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Update golang x/crypto dependencies (#2923)

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Lauris BH 2017-11-16 07:53:23 +02:00 committed by GitHub
parent 074f6c1b49
commit 3138417c63
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GPG key ID: 4AEE18F83AFDEB23
31 changed files with 1332 additions and 1317 deletions
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8
vendor/golang.org/x/crypto/curve25519/const_amd64.h generated vendored Normal file
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@ -0,0 +1,8 @@
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This code was translated into a form compatible with 6a from the public
// domain sources in SUPERCOP: https://bench.cr.yp.to/supercop.html
#define REDMASK51 0x0007FFFFFFFFFFFF

6
vendor/golang.org/x/crypto/curve25519/const_amd64.s generated vendored
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@ -3,12 +3,12 @@
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// This code was translated into a form compatible with 6a from the public // This code was translated into a form compatible with 6a from the public
// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html // domain sources in SUPERCOP: https://bench.cr.yp.to/supercop.html
// +build amd64,!gccgo,!appengine // +build amd64,!gccgo,!appengine
DATA ·REDMASK51(SB)/8, $0x0007FFFFFFFFFFFF // These constants cannot be encoded in non-MOVQ immediates.
GLOBL ·REDMASK51(SB), 8, $8 // We access them directly from memory instead.
DATA ·_121666_213(SB)/8, $996687872 DATA ·_121666_213(SB)/8, $996687872
GLOBL ·_121666_213(SB), 8, $8 GLOBL ·_121666_213(SB), 8, $8

131
vendor/golang.org/x/crypto/curve25519/cswap_amd64.s generated vendored
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@ -2,87 +2,64 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// This code was translated into a form compatible with 6a from the public
// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html
// +build amd64,!gccgo,!appengine // +build amd64,!gccgo,!appengine
// func cswap(inout *[5]uint64, v uint64) // func cswap(inout *[4][5]uint64, v uint64)
TEXT ·cswap(SB),7,$0 TEXT ·cswap(SB),7,$0
MOVQ inout+0(FP),DI MOVQ inout+0(FP),DI
MOVQ v+8(FP),SI MOVQ v+8(FP),SI
CMPQ SI,$1 SUBQ $1, SI
MOVQ 0(DI),SI NOTQ SI
MOVQ 80(DI),DX MOVQ SI, X15
MOVQ 8(DI),CX PSHUFD $0x44, X15, X15
MOVQ 88(DI),R8
MOVQ SI,R9 MOVOU 0(DI), X0
CMOVQEQ DX,SI MOVOU 16(DI), X2
CMOVQEQ R9,DX MOVOU 32(DI), X4
MOVQ CX,R9 MOVOU 48(DI), X6
CMOVQEQ R8,CX MOVOU 64(DI), X8
CMOVQEQ R9,R8 MOVOU 80(DI), X1
MOVQ SI,0(DI) MOVOU 96(DI), X3
MOVQ DX,80(DI) MOVOU 112(DI), X5
MOVQ CX,8(DI) MOVOU 128(DI), X7
MOVQ R8,88(DI) MOVOU 144(DI), X9
MOVQ 16(DI),SI
MOVQ 96(DI),DX MOVO X1, X10
MOVQ 24(DI),CX MOVO X3, X11
MOVQ 104(DI),R8 MOVO X5, X12
MOVQ SI,R9 MOVO X7, X13
CMOVQEQ DX,SI MOVO X9, X14
CMOVQEQ R9,DX
MOVQ CX,R9 PXOR X0, X10
CMOVQEQ R8,CX PXOR X2, X11
CMOVQEQ R9,R8 PXOR X4, X12
MOVQ SI,16(DI) PXOR X6, X13
MOVQ DX,96(DI) PXOR X8, X14
MOVQ CX,24(DI) PAND X15, X10
MOVQ R8,104(DI) PAND X15, X11
MOVQ 32(DI),SI PAND X15, X12
MOVQ 112(DI),DX PAND X15, X13
MOVQ 40(DI),CX PAND X15, X14
MOVQ 120(DI),R8 PXOR X10, X0
MOVQ SI,R9 PXOR X10, X1
CMOVQEQ DX,SI PXOR X11, X2
CMOVQEQ R9,DX PXOR X11, X3
MOVQ CX,R9 PXOR X12, X4
CMOVQEQ R8,CX PXOR X12, X5
CMOVQEQ R9,R8 PXOR X13, X6
MOVQ SI,32(DI) PXOR X13, X7
MOVQ DX,112(DI) PXOR X14, X8
MOVQ CX,40(DI) PXOR X14, X9
MOVQ R8,120(DI)
MOVQ 48(DI),SI MOVOU X0, 0(DI)
MOVQ 128(DI),DX MOVOU X2, 16(DI)
MOVQ 56(DI),CX MOVOU X4, 32(DI)
MOVQ 136(DI),R8 MOVOU X6, 48(DI)
MOVQ SI,R9 MOVOU X8, 64(DI)
CMOVQEQ DX,SI MOVOU X1, 80(DI)
CMOVQEQ R9,DX MOVOU X3, 96(DI)
MOVQ CX,R9 MOVOU X5, 112(DI)
CMOVQEQ R8,CX MOVOU X7, 128(DI)
CMOVQEQ R9,R8 MOVOU X9, 144(DI)
MOVQ SI,48(DI)
MOVQ DX,128(DI)
MOVQ CX,56(DI)
MOVQ R8,136(DI)
MOVQ 64(DI),SI
MOVQ 144(DI),DX
MOVQ 72(DI),CX
MOVQ 152(DI),R8
MOVQ SI,R9
CMOVQEQ DX,SI
CMOVQEQ R9,DX
MOVQ CX,R9
CMOVQEQ R8,CX
CMOVQEQ R9,R8
MOVQ SI,64(DI)
MOVQ DX,144(DI)
MOVQ CX,72(DI)
MOVQ R8,152(DI)
MOVQ DI,AX
MOVQ SI,DX
RET RET

841
vendor/golang.org/x/crypto/curve25519/curve25519.go generated vendored
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@ -1,841 +0,0 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// We have a implementation in amd64 assembly so this code is only run on
// non-amd64 platforms. The amd64 assembly does not support gccgo.
// +build !amd64 gccgo appengine
package curve25519
// This code is a port of the public domain, "ref10" implementation of
// curve25519 from SUPERCOP 20130419 by D. J. Bernstein.
// fieldElement represents an element of the field GF(2^255 - 19). An element
// t, entries t[0]...t[9], represents the integer t[0]+2^26 t[1]+2^51 t[2]+2^77
// t[3]+2^102 t[4]+...+2^230 t[9]. Bounds on each t[i] vary depending on
// context.
type fieldElement [10]int32
func feZero(fe *fieldElement) {
for i := range fe {
fe[i] = 0
}
}
func feOne(fe *fieldElement) {
feZero(fe)
fe[0] = 1
}
func feAdd(dst, a, b *fieldElement) {
for i := range dst {
dst[i] = a[i] + b[i]
}
}
func feSub(dst, a, b *fieldElement) {
for i := range dst {
dst[i] = a[i] - b[i]
}
}
func feCopy(dst, src *fieldElement) {
for i := range dst {
dst[i] = src[i]
}
}
// feCSwap replaces (f,g) with (g,f) if b == 1; replaces (f,g) with (f,g) if b == 0.
//
// Preconditions: b in {0,1}.
func feCSwap(f, g *fieldElement, b int32) {
var x fieldElement
b = -b
for i := range x {
x[i] = b & (f[i] ^ g[i])
}
for i := range f {
f[i] ^= x[i]
}
for i := range g {
g[i] ^= x[i]
}
}
// load3 reads a 24-bit, little-endian value from in.
func load3(in []byte) int64 {
var r int64
r = int64(in[0])
r |= int64(in[1]) << 8
r |= int64(in[2]) << 16
return r
}
// load4 reads a 32-bit, little-endian value from in.
func load4(in []byte) int64 {
var r int64
r = int64(in[0])
r |= int64(in[1]) << 8
r |= int64(in[2]) << 16
r |= int64(in[3]) << 24
return r
}
func feFromBytes(dst *fieldElement, src *[32]byte) {
h0 := load4(src[:])
h1 := load3(src[4:]) << 6
h2 := load3(src[7:]) << 5
h3 := load3(src[10:]) << 3
h4 := load3(src[13:]) << 2
h5 := load4(src[16:])
h6 := load3(src[20:]) << 7
h7 := load3(src[23:]) << 5
h8 := load3(src[26:]) << 4
h9 := load3(src[29:]) << 2
var carry [10]int64
carry[9] = (h9 + 1<<24) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
carry[1] = (h1 + 1<<24) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[3] = (h3 + 1<<24) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[5] = (h5 + 1<<24) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
carry[7] = (h7 + 1<<24) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
carry[0] = (h0 + 1<<25) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[2] = (h2 + 1<<25) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[4] = (h4 + 1<<25) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[6] = (h6 + 1<<25) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
carry[8] = (h8 + 1<<25) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
dst[0] = int32(h0)
dst[1] = int32(h1)
dst[2] = int32(h2)
dst[3] = int32(h3)
dst[4] = int32(h4)
dst[5] = int32(h5)
dst[6] = int32(h6)
dst[7] = int32(h7)
dst[8] = int32(h8)
dst[9] = int32(h9)
}
// feToBytes marshals h to s.
// Preconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
//
// Write p=2^255-19; q=floor(h/p).
// Basic claim: q = floor(2^(-255)(h + 19 2^(-25)h9 + 2^(-1))).
//
// Proof:
// Have |h|<=p so |q|<=1 so |19^2 2^(-255) q|<1/4.
// Also have |h-2^230 h9|<2^230 so |19 2^(-255)(h-2^230 h9)|<1/4.
//
// Write y=2^(-1)-19^2 2^(-255)q-19 2^(-255)(h-2^230 h9).
// Then 0<y<1.
//
// Write r=h-pq.
// Have 0<=r<=p-1=2^255-20.
// Thus 0<=r+19(2^-255)r<r+19(2^-255)2^255<=2^255-1.
//
// Write x=r+19(2^-255)r+y.
// Then 0<x<2^255 so floor(2^(-255)x) = 0 so floor(q+2^(-255)x) = q.
//
// Have q+2^(-255)x = 2^(-255)(h + 19 2^(-25) h9 + 2^(-1))
// so floor(2^(-255)(h + 19 2^(-25) h9 + 2^(-1))) = q.
func feToBytes(s *[32]byte, h *fieldElement) {
var carry [10]int32
q := (19*h[9] + (1 << 24)) >> 25
q = (h[0] + q) >> 26
q = (h[1] + q) >> 25
q = (h[2] + q) >> 26
q = (h[3] + q) >> 25
q = (h[4] + q) >> 26
q = (h[5] + q) >> 25
q = (h[6] + q) >> 26
q = (h[7] + q) >> 25
q = (h[8] + q) >> 26
q = (h[9] + q) >> 25
// Goal: Output h-(2^255-19)q, which is between 0 and 2^255-20.
h[0] += 19 * q
// Goal: Output h-2^255 q, which is between 0 and 2^255-20.
carry[0] = h[0] >> 26
h[1] += carry[0]
h[0] -= carry[0] << 26
carry[1] = h[1] >> 25
h[2] += carry[1]
h[1] -= carry[1] << 25
carry[2] = h[2] >> 26
h[3] += carry[2]
h[2] -= carry[2] << 26
carry[3] = h[3] >> 25
h[4] += carry[3]
h[3] -= carry[3] << 25
carry[4] = h[4] >> 26
h[5] += carry[4]
h[4] -= carry[4] << 26
carry[5] = h[5] >> 25
h[6] += carry[5]
h[5] -= carry[5] << 25
carry[6] = h[6] >> 26
h[7] += carry[6]
h[6] -= carry[6] << 26
carry[7] = h[7] >> 25
h[8] += carry[7]
h[7] -= carry[7] << 25
carry[8] = h[8] >> 26
h[9] += carry[8]
h[8] -= carry[8] << 26
carry[9] = h[9] >> 25
h[9] -= carry[9] << 25
// h10 = carry9
// Goal: Output h[0]+...+2^255 h10-2^255 q, which is between 0 and 2^255-20.
// Have h[0]+...+2^230 h[9] between 0 and 2^255-1;
// evidently 2^255 h10-2^255 q = 0.
// Goal: Output h[0]+...+2^230 h[9].
s[0] = byte(h[0] >> 0)
s[1] = byte(h[0] >> 8)
s[2] = byte(h[0] >> 16)
s[3] = byte((h[0] >> 24) | (h[1] << 2))
s[4] = byte(h[1] >> 6)
s[5] = byte(h[1] >> 14)
s[6] = byte((h[1] >> 22) | (h[2] << 3))
s[7] = byte(h[2] >> 5)
s[8] = byte(h[2] >> 13)
s[9] = byte((h[2] >> 21) | (h[3] << 5))
s[10] = byte(h[3] >> 3)
s[11] = byte(h[3] >> 11)
s[12] = byte((h[3] >> 19) | (h[4] << 6))
s[13] = byte(h[4] >> 2)
s[14] = byte(h[4] >> 10)
s[15] = byte(h[4] >> 18)
s[16] = byte(h[5] >> 0)
s[17] = byte(h[5] >> 8)
s[18] = byte(h[5] >> 16)
s[19] = byte((h[5] >> 24) | (h[6] << 1))
s[20] = byte(h[6] >> 7)
s[21] = byte(h[6] >> 15)
s[22] = byte((h[6] >> 23) | (h[7] << 3))
s[23] = byte(h[7] >> 5)
s[24] = byte(h[7] >> 13)
s[25] = byte((h[7] >> 21) | (h[8] << 4))
s[26] = byte(h[8] >> 4)
s[27] = byte(h[8] >> 12)
s[28] = byte((h[8] >> 20) | (h[9] << 6))
s[29] = byte(h[9] >> 2)
s[30] = byte(h[9] >> 10)
s[31] = byte(h[9] >> 18)
}
// feMul calculates h = f * g
// Can overlap h with f or g.
//
// Preconditions:
// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
// |g| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
//
// Postconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
//
// Notes on implementation strategy:
//
// Using schoolbook multiplication.
// Karatsuba would save a little in some cost models.
//
// Most multiplications by 2 and 19 are 32-bit precomputations;
// cheaper than 64-bit postcomputations.
//
// There is one remaining multiplication by 19 in the carry chain;
// one *19 precomputation can be merged into this,
// but the resulting data flow is considerably less clean.
//
// There are 12 carries below.
// 10 of them are 2-way parallelizable and vectorizable.
// Can get away with 11 carries, but then data flow is much deeper.
//
// With tighter constraints on inputs can squeeze carries into int32.
func feMul(h, f, g *fieldElement) {
f0 := f[0]
f1 := f[1]
f2 := f[2]
f3 := f[3]
f4 := f[4]
f5 := f[5]
f6 := f[6]
f7 := f[7]
f8 := f[8]
f9 := f[9]
g0 := g[0]
g1 := g[1]
g2 := g[2]
g3 := g[3]
g4 := g[4]
g5 := g[5]
g6 := g[6]
g7 := g[7]
g8 := g[8]
g9 := g[9]
g1_19 := 19 * g1 // 1.4*2^29
g2_19 := 19 * g2 // 1.4*2^30; still ok
g3_19 := 19 * g3
g4_19 := 19 * g4
g5_19 := 19 * g5
g6_19 := 19 * g6
g7_19 := 19 * g7
g8_19 := 19 * g8
g9_19 := 19 * g9
f1_2 := 2 * f1
f3_2 := 2 * f3
f5_2 := 2 * f5
f7_2 := 2 * f7
f9_2 := 2 * f9
f0g0 := int64(f0) * int64(g0)
f0g1 := int64(f0) * int64(g1)
f0g2 := int64(f0) * int64(g2)
f0g3 := int64(f0) * int64(g3)
f0g4 := int64(f0) * int64(g4)
f0g5 := int64(f0) * int64(g5)
f0g6 := int64(f0) * int64(g6)
f0g7 := int64(f0) * int64(g7)
f0g8 := int64(f0) * int64(g8)
f0g9 := int64(f0) * int64(g9)
f1g0 := int64(f1) * int64(g0)
f1g1_2 := int64(f1_2) * int64(g1)
f1g2 := int64(f1) * int64(g2)
f1g3_2 := int64(f1_2) * int64(g3)
f1g4 := int64(f1) * int64(g4)
f1g5_2 := int64(f1_2) * int64(g5)
f1g6 := int64(f1) * int64(g6)
f1g7_2 := int64(f1_2) * int64(g7)
f1g8 := int64(f1) * int64(g8)
f1g9_38 := int64(f1_2) * int64(g9_19)
f2g0 := int64(f2) * int64(g0)
f2g1 := int64(f2) * int64(g1)
f2g2 := int64(f2) * int64(g2)
f2g3 := int64(f2) * int64(g3)
f2g4 := int64(f2) * int64(g4)
f2g5 := int64(f2) * int64(g5)
f2g6 := int64(f2) * int64(g6)
f2g7 := int64(f2) * int64(g7)
f2g8_19 := int64(f2) * int64(g8_19)
f2g9_19 := int64(f2) * int64(g9_19)
f3g0 := int64(f3) * int64(g0)
f3g1_2 := int64(f3_2) * int64(g1)
f3g2 := int64(f3) * int64(g2)
f3g3_2 := int64(f3_2) * int64(g3)
f3g4 := int64(f3) * int64(g4)
f3g5_2 := int64(f3_2) * int64(g5)
f3g6 := int64(f3) * int64(g6)
f3g7_38 := int64(f3_2) * int64(g7_19)
f3g8_19 := int64(f3) * int64(g8_19)
f3g9_38 := int64(f3_2) * int64(g9_19)
f4g0 := int64(f4) * int64(g0)
f4g1 := int64(f4) * int64(g1)
f4g2 := int64(f4) * int64(g2)
f4g3 := int64(f4) * int64(g3)
f4g4 := int64(f4) * int64(g4)
f4g5 := int64(f4) * int64(g5)
f4g6_19 := int64(f4) * int64(g6_19)
f4g7_19 := int64(f4) * int64(g7_19)
f4g8_19 := int64(f4) * int64(g8_19)
f4g9_19 := int64(f4) * int64(g9_19)
f5g0 := int64(f5) * int64(g0)
f5g1_2 := int64(f5_2) * int64(g1)
f5g2 := int64(f5) * int64(g2)
f5g3_2 := int64(f5_2) * int64(g3)
f5g4 := int64(f5) * int64(g4)
f5g5_38 := int64(f5_2) * int64(g5_19)
f5g6_19 := int64(f5) * int64(g6_19)
f5g7_38 := int64(f5_2) * int64(g7_19)
f5g8_19 := int64(f5) * int64(g8_19)
f5g9_38 := int64(f5_2) * int64(g9_19)
f6g0 := int64(f6) * int64(g0)
f6g1 := int64(f6) * int64(g1)
f6g2 := int64(f6) * int64(g2)
f6g3 := int64(f6) * int64(g3)
f6g4_19 := int64(f6) * int64(g4_19)
f6g5_19 := int64(f6) * int64(g5_19)
f6g6_19 := int64(f6) * int64(g6_19)
f6g7_19 := int64(f6) * int64(g7_19)
f6g8_19 := int64(f6) * int64(g8_19)
f6g9_19 := int64(f6) * int64(g9_19)
f7g0 := int64(f7) * int64(g0)
f7g1_2 := int64(f7_2) * int64(g1)
f7g2 := int64(f7) * int64(g2)
f7g3_38 := int64(f7_2) * int64(g3_19)
f7g4_19 := int64(f7) * int64(g4_19)
f7g5_38 := int64(f7_2) * int64(g5_19)
f7g6_19 := int64(f7) * int64(g6_19)
f7g7_38 := int64(f7_2) * int64(g7_19)
f7g8_19 := int64(f7) * int64(g8_19)
f7g9_38 := int64(f7_2) * int64(g9_19)
f8g0 := int64(f8) * int64(g0)
f8g1 := int64(f8) * int64(g1)
f8g2_19 := int64(f8) * int64(g2_19)
f8g3_19 := int64(f8) * int64(g3_19)
f8g4_19 := int64(f8) * int64(g4_19)
f8g5_19 := int64(f8) * int64(g5_19)
f8g6_19 := int64(f8) * int64(g6_19)
f8g7_19 := int64(f8) * int64(g7_19)
f8g8_19 := int64(f8) * int64(g8_19)
f8g9_19 := int64(f8) * int64(g9_19)
f9g0 := int64(f9) * int64(g0)
f9g1_38 := int64(f9_2) * int64(g1_19)
f9g2_19 := int64(f9) * int64(g2_19)
f9g3_38 := int64(f9_2) * int64(g3_19)
f9g4_19 := int64(f9) * int64(g4_19)
f9g5_38 := int64(f9_2) * int64(g5_19)
f9g6_19 := int64(f9) * int64(g6_19)
f9g7_38 := int64(f9_2) * int64(g7_19)
f9g8_19 := int64(f9) * int64(g8_19)
f9g9_38 := int64(f9_2) * int64(g9_19)
h0 := f0g0 + f1g9_38 + f2g8_19 + f3g7_38 + f4g6_19 + f5g5_38 + f6g4_19 + f7g3_38 + f8g2_19 + f9g1_38
h1 := f0g1 + f1g0 + f2g9_19 + f3g8_19 + f4g7_19 + f5g6_19 + f6g5_19 + f7g4_19 + f8g3_19 + f9g2_19
h2 := f0g2 + f1g1_2 + f2g0 + f3g9_38 + f4g8_19 + f5g7_38 + f6g6_19 + f7g5_38 + f8g4_19 + f9g3_38
h3 := f0g3 + f1g2 + f2g1 + f3g0 + f4g9_19 + f5g8_19 + f6g7_19 + f7g6_19 + f8g5_19 + f9g4_19
h4 := f0g4 + f1g3_2 + f2g2 + f3g1_2 + f4g0 + f5g9_38 + f6g8_19 + f7g7_38 + f8g6_19 + f9g5_38
h5 := f0g5 + f1g4 + f2g3 + f3g2 + f4g1 + f5g0 + f6g9_19 + f7g8_19 + f8g7_19 + f9g6_19
h6 := f0g6 + f1g5_2 + f2g4 + f3g3_2 + f4g2 + f5g1_2 + f6g0 + f7g9_38 + f8g8_19 + f9g7_38
h7 := f0g7 + f1g6 + f2g5 + f3g4 + f4g3 + f5g2 + f6g1 + f7g0 + f8g9_19 + f9g8_19
h8 := f0g8 + f1g7_2 + f2g6 + f3g5_2 + f4g4 + f5g3_2 + f6g2 + f7g1_2 + f8g0 + f9g9_38
h9 := f0g9 + f1g8 + f2g7 + f3g6 + f4g5 + f5g4 + f6g3 + f7g2 + f8g1 + f9g0
var carry [10]int64
// |h0| <= (1.1*1.1*2^52*(1+19+19+19+19)+1.1*1.1*2^50*(38+38+38+38+38))
// i.e. |h0| <= 1.2*2^59; narrower ranges for h2, h4, h6, h8
// |h1| <= (1.1*1.1*2^51*(1+1+19+19+19+19+19+19+19+19))
// i.e. |h1| <= 1.5*2^58; narrower ranges for h3, h5, h7, h9
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
// |h0| <= 2^25
// |h4| <= 2^25
// |h1| <= 1.51*2^58
// |h5| <= 1.51*2^58
carry[1] = (h1 + (1 << 24)) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[5] = (h5 + (1 << 24)) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
// |h1| <= 2^24; from now on fits into int32
// |h5| <= 2^24; from now on fits into int32
// |h2| <= 1.21*2^59
// |h6| <= 1.21*2^59
carry[2] = (h2 + (1 << 25)) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[6] = (h6 + (1 << 25)) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
// |h2| <= 2^25; from now on fits into int32 unchanged
// |h6| <= 2^25; from now on fits into int32 unchanged
// |h3| <= 1.51*2^58
// |h7| <= 1.51*2^58
carry[3] = (h3 + (1 << 24)) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[7] = (h7 + (1 << 24)) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
// |h3| <= 2^24; from now on fits into int32 unchanged
// |h7| <= 2^24; from now on fits into int32 unchanged
// |h4| <= 1.52*2^33
// |h8| <= 1.52*2^33
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[8] = (h8 + (1 << 25)) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
// |h4| <= 2^25; from now on fits into int32 unchanged
// |h8| <= 2^25; from now on fits into int32 unchanged
// |h5| <= 1.01*2^24
// |h9| <= 1.51*2^58
carry[9] = (h9 + (1 << 24)) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
// |h9| <= 2^24; from now on fits into int32 unchanged
// |h0| <= 1.8*2^37
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
// |h0| <= 2^25; from now on fits into int32 unchanged
// |h1| <= 1.01*2^24
h[0] = int32(h0)
h[1] = int32(h1)
h[2] = int32(h2)
h[3] = int32(h3)
h[4] = int32(h4)
h[5] = int32(h5)
h[6] = int32(h6)
h[7] = int32(h7)
h[8] = int32(h8)
h[9] = int32(h9)
}
// feSquare calculates h = f*f. Can overlap h with f.
//
// Preconditions:
// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
//
// Postconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
func feSquare(h, f *fieldElement) {
f0 := f[0]
f1 := f[1]
f2 := f[2]
f3 := f[3]
f4 := f[4]
f5 := f[5]
f6 := f[6]
f7 := f[7]
f8 := f[8]
f9 := f[9]
f0_2 := 2 * f0
f1_2 := 2 * f1
f2_2 := 2 * f2
f3_2 := 2 * f3
f4_2 := 2 * f4
f5_2 := 2 * f5
f6_2 := 2 * f6
f7_2 := 2 * f7
f5_38 := 38 * f5 // 1.31*2^30
f6_19 := 19 * f6 // 1.31*2^30
f7_38 := 38 * f7 // 1.31*2^30
f8_19 := 19 * f8 // 1.31*2^30
f9_38 := 38 * f9 // 1.31*2^30
f0f0 := int64(f0) * int64(f0)
f0f1_2 := int64(f0_2) * int64(f1)
f0f2_2 := int64(f0_2) * int64(f2)
f0f3_2 := int64(f0_2) * int64(f3)
f0f4_2 := int64(f0_2) * int64(f4)
f0f5_2 := int64(f0_2) * int64(f5)
f0f6_2 := int64(f0_2) * int64(f6)
f0f7_2 := int64(f0_2) * int64(f7)
f0f8_2 := int64(f0_2) * int64(f8)
f0f9_2 := int64(f0_2) * int64(f9)
f1f1_2 := int64(f1_2) * int64(f1)
f1f2_2 := int64(f1_2) * int64(f2)
f1f3_4 := int64(f1_2) * int64(f3_2)
f1f4_2 := int64(f1_2) * int64(f4)
f1f5_4 := int64(f1_2) * int64(f5_2)
f1f6_2 := int64(f1_2) * int64(f6)
f1f7_4 := int64(f1_2) * int64(f7_2)
f1f8_2 := int64(f1_2) * int64(f8)
f1f9_76 := int64(f1_2) * int64(f9_38)
f2f2 := int64(f2) * int64(f2)
f2f3_2 := int64(f2_2) * int64(f3)
f2f4_2 := int64(f2_2) * int64(f4)
f2f5_2 := int64(f2_2) * int64(f5)
f2f6_2 := int64(f2_2) * int64(f6)
f2f7_2 := int64(f2_2) * int64(f7)
f2f8_38 := int64(f2_2) * int64(f8_19)
f2f9_38 := int64(f2) * int64(f9_38)
f3f3_2 := int64(f3_2) * int64(f3)
f3f4_2 := int64(f3_2) * int64(f4)
f3f5_4 := int64(f3_2) * int64(f5_2)
f3f6_2 := int64(f3_2) * int64(f6)
f3f7_76 := int64(f3_2) * int64(f7_38)
f3f8_38 := int64(f3_2) * int64(f8_19)
f3f9_76 := int64(f3_2) * int64(f9_38)
f4f4 := int64(f4) * int64(f4)
f4f5_2 := int64(f4_2) * int64(f5)
f4f6_38 := int64(f4_2) * int64(f6_19)
f4f7_38 := int64(f4) * int64(f7_38)
f4f8_38 := int64(f4_2) * int64(f8_19)
f4f9_38 := int64(f4) * int64(f9_38)
f5f5_38 := int64(f5) * int64(f5_38)
f5f6_38 := int64(f5_2) * int64(f6_19)
f5f7_76 := int64(f5_2) * int64(f7_38)
f5f8_38 := int64(f5_2) * int64(f8_19)
f5f9_76 := int64(f5_2) * int64(f9_38)
f6f6_19 := int64(f6) * int64(f6_19)
f6f7_38 := int64(f6) * int64(f7_38)
f6f8_38 := int64(f6_2) * int64(f8_19)
f6f9_38 := int64(f6) * int64(f9_38)
f7f7_38 := int64(f7) * int64(f7_38)
f7f8_38 := int64(f7_2) * int64(f8_19)
f7f9_76 := int64(f7_2) * int64(f9_38)
f8f8_19 := int64(f8) * int64(f8_19)
f8f9_38 := int64(f8) * int64(f9_38)
f9f9_38 := int64(f9) * int64(f9_38)
h0 := f0f0 + f1f9_76 + f2f8_38 + f3f7_76 + f4f6_38 + f5f5_38
h1 := f0f1_2 + f2f9_38 + f3f8_38 + f4f7_38 + f5f6_38
h2 := f0f2_2 + f1f1_2 + f3f9_76 + f4f8_38 + f5f7_76 + f6f6_19
h3 := f0f3_2 + f1f2_2 + f4f9_38 + f5f8_38 + f6f7_38
h4 := f0f4_2 + f1f3_4 + f2f2 + f5f9_76 + f6f8_38 + f7f7_38
h5 := f0f5_2 + f1f4_2 + f2f3_2 + f6f9_38 + f7f8_38
h6 := f0f6_2 + f1f5_4 + f2f4_2 + f3f3_2 + f7f9_76 + f8f8_19
h7 := f0f7_2 + f1f6_2 + f2f5_2 + f3f4_2 + f8f9_38
h8 := f0f8_2 + f1f7_4 + f2f6_2 + f3f5_4 + f4f4 + f9f9_38
h9 := f0f9_2 + f1f8_2 + f2f7_2 + f3f6_2 + f4f5_2
var carry [10]int64
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[1] = (h1 + (1 << 24)) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[5] = (h5 + (1 << 24)) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
carry[2] = (h2 + (1 << 25)) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[6] = (h6 + (1 << 25)) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
carry[3] = (h3 + (1 << 24)) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[7] = (h7 + (1 << 24)) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[8] = (h8 + (1 << 25)) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
carry[9] = (h9 + (1 << 24)) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
h[0] = int32(h0)
h[1] = int32(h1)
h[2] = int32(h2)
h[3] = int32(h3)
h[4] = int32(h4)
h[5] = int32(h5)
h[6] = int32(h6)
h[7] = int32(h7)
h[8] = int32(h8)
h[9] = int32(h9)
}
// feMul121666 calculates h = f * 121666. Can overlap h with f.
//
// Preconditions:
// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
//
// Postconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
func feMul121666(h, f *fieldElement) {
h0 := int64(f[0]) * 121666
h1 := int64(f[1]) * 121666
h2 := int64(f[2]) * 121666
h3 := int64(f[3]) * 121666
h4 := int64(f[4]) * 121666
h5 := int64(f[5]) * 121666
h6 := int64(f[6]) * 121666
h7 := int64(f[7]) * 121666
h8 := int64(f[8]) * 121666
h9 := int64(f[9]) * 121666
var carry [10]int64
carry[9] = (h9 + (1 << 24)) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
carry[1] = (h1 + (1 << 24)) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[3] = (h3 + (1 << 24)) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[5] = (h5 + (1 << 24)) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
carry[7] = (h7 + (1 << 24)) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[2] = (h2 + (1 << 25)) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[6] = (h6 + (1 << 25)) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
carry[8] = (h8 + (1 << 25)) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
h[0] = int32(h0)
h[1] = int32(h1)
h[2] = int32(h2)
h[3] = int32(h3)
h[4] = int32(h4)
h[5] = int32(h5)
h[6] = int32(h6)
h[7] = int32(h7)
h[8] = int32(h8)
h[9] = int32(h9)
}
// feInvert sets out = z^-1.
func feInvert(out, z *fieldElement) {
var t0, t1, t2, t3 fieldElement
var i int
feSquare(&t0, z)
for i = 1; i < 1; i++ {
feSquare(&t0, &t0)
}
feSquare(&t1, &t0)
for i = 1; i < 2; i++ {
feSquare(&t1, &t1)
}
feMul(&t1, z, &t1)
feMul(&t0, &t0, &t1)
feSquare(&t2, &t0)
for i = 1; i < 1; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t1, &t2)
feSquare(&t2, &t1)
for i = 1; i < 5; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t2, &t1)
feSquare(&t2, &t1)
for i = 1; i < 10; i++ {
feSquare(&t2, &t2)
}
feMul(&t2, &t2, &t1)
feSquare(&t3, &t2)
for i = 1; i < 20; i++ {
feSquare(&t3, &t3)
}
feMul(&t2, &t3, &t2)
feSquare(&t2, &t2)
for i = 1; i < 10; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t2, &t1)
feSquare(&t2, &t1)
for i = 1; i < 50; i++ {
feSquare(&t2, &t2)
}
feMul(&t2, &t2, &t1)
feSquare(&t3, &t2)
for i = 1; i < 100; i++ {
feSquare(&t3, &t3)
}
feMul(&t2, &t3, &t2)
feSquare(&t2, &t2)
for i = 1; i < 50; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t2, &t1)
feSquare(&t1, &t1)
for i = 1; i < 5; i++ {
feSquare(&t1, &t1)
}
feMul(out, &t1, &t0)
}
func scalarMult(out, in, base *[32]byte) {
var e [32]byte
copy(e[:], in[:])
e[0] &= 248
e[31] &= 127
e[31] |= 64
var x1, x2, z2, x3, z3, tmp0, tmp1 fieldElement
feFromBytes(&x1, base)
feOne(&x2)
feCopy(&x3, &x1)
feOne(&z3)
swap := int32(0)
for pos := 254; pos >= 0; pos-- {
b := e[pos/8] >> uint(pos&7)
b &= 1
swap ^= int32(b)
feCSwap(&x2, &x3, swap)
feCSwap(&z2, &z3, swap)
swap = int32(b)
feSub(&tmp0, &x3, &z3)
feSub(&tmp1, &x2, &z2)
feAdd(&x2, &x2, &z2)
feAdd(&z2, &x3, &z3)
feMul(&z3, &tmp0, &x2)
feMul(&z2, &z2, &tmp1)
feSquare(&tmp0, &tmp1)
feSquare(&tmp1, &x2)
feAdd(&x3, &z3, &z2)
feSub(&z2, &z3, &z2)
feMul(&x2, &tmp1, &tmp0)
feSub(&tmp1, &tmp1, &tmp0)
feSquare(&z2, &z2)
feMul121666(&z3, &tmp1)
feSquare(&x3, &x3)
feAdd(&tmp0, &tmp0, &z3)
feMul(&z3, &x1, &z2)
feMul(&z2, &tmp1, &tmp0)
}
feCSwap(&x2, &x3, swap)
feCSwap(&z2, &z3, swap)
feInvert(&z2, &z2)
feMul(&x2, &x2, &z2)
feToBytes(out, &x2)
}

2
vendor/golang.org/x/crypto/curve25519/doc.go generated vendored
View file

@ -3,7 +3,7 @@
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// Package curve25519 provides an implementation of scalar multiplication on // Package curve25519 provides an implementation of scalar multiplication on
// the elliptic curve known as curve25519. See http://cr.yp.to/ecdh.html // the elliptic curve known as curve25519. See https://cr.yp.to/ecdh.html
package curve25519 // import "golang.org/x/crypto/curve25519" package curve25519 // import "golang.org/x/crypto/curve25519"
// basePoint is the x coordinate of the generator of the curve. // basePoint is the x coordinate of the generator of the curve.

6
vendor/golang.org/x/crypto/curve25519/freeze_amd64.s generated vendored
View file

@ -3,10 +3,12 @@
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// This code was translated into a form compatible with 6a from the public // This code was translated into a form compatible with 6a from the public
// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html // domain sources in SUPERCOP: https://bench.cr.yp.to/supercop.html
// +build amd64,!gccgo,!appengine // +build amd64,!gccgo,!appengine
#include "const_amd64.h"
// func freeze(inout *[5]uint64) // func freeze(inout *[5]uint64)
TEXT ·freeze(SB),7,$0-8 TEXT ·freeze(SB),7,$0-8
MOVQ inout+0(FP), DI MOVQ inout+0(FP), DI
@ -16,7 +18,7 @@ TEXT ·freeze(SB),7,$0-8
MOVQ 16(DI),CX MOVQ 16(DI),CX
MOVQ 24(DI),R8 MOVQ 24(DI),R8
MOVQ 32(DI),R9 MOVQ 32(DI),R9
MOVQ ·REDMASK51(SB),AX MOVQ $REDMASK51,AX
MOVQ AX,R10 MOVQ AX,R10
SUBQ $18,R10 SUBQ $18,R10
MOVQ $3,R11 MOVQ $3,R11

22
vendor/golang.org/x/crypto/curve25519/ladderstep_amd64.s generated vendored
View file

@ -3,10 +3,12 @@
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// This code was translated into a form compatible with 6a from the public // This code was translated into a form compatible with 6a from the public
// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html // domain sources in SUPERCOP: https://bench.cr.yp.to/supercop.html
// +build amd64,!gccgo,!appengine // +build amd64,!gccgo,!appengine
#include "const_amd64.h"
// func ladderstep(inout *[5][5]uint64) // func ladderstep(inout *[5][5]uint64)
TEXT ·ladderstep(SB),0,$296-8 TEXT ·ladderstep(SB),0,$296-8
MOVQ inout+0(FP),DI MOVQ inout+0(FP),DI
@ -118,7 +120,7 @@ TEXT ·ladderstep(SB),0,$296-8
MULQ 72(SP) MULQ 72(SP)
ADDQ AX,R12 ADDQ AX,R12
ADCQ DX,R13 ADCQ DX,R13
MOVQ ·REDMASK51(SB),DX MOVQ $REDMASK51,DX
SHLQ $13,CX:SI SHLQ $13,CX:SI
ANDQ DX,SI ANDQ DX,SI
SHLQ $13,R9:R8 SHLQ $13,R9:R8
@ -233,7 +235,7 @@ TEXT ·ladderstep(SB),0,$296-8
MULQ 32(SP) MULQ 32(SP)
ADDQ AX,R12 ADDQ AX,R12
ADCQ DX,R13 ADCQ DX,R13
MOVQ ·REDMASK51(SB),DX MOVQ $REDMASK51,DX
SHLQ $13,CX:SI SHLQ $13,CX:SI
ANDQ DX,SI ANDQ DX,SI
SHLQ $13,R9:R8 SHLQ $13,R9:R8
@ -438,7 +440,7 @@ TEXT ·ladderstep(SB),0,$296-8
MULQ 72(SP) MULQ 72(SP)
ADDQ AX,R12 ADDQ AX,R12
ADCQ DX,R13 ADCQ DX,R13
MOVQ ·REDMASK51(SB),DX MOVQ $REDMASK51,DX
SHLQ $13,CX:SI SHLQ $13,CX:SI
ANDQ DX,SI ANDQ DX,SI
SHLQ $13,R9:R8 SHLQ $13,R9:R8
@ -588,7 +590,7 @@ TEXT ·ladderstep(SB),0,$296-8
MULQ 32(SP) MULQ 32(SP)
ADDQ AX,R12 ADDQ AX,R12
ADCQ DX,R13 ADCQ DX,R13
MOVQ ·REDMASK51(SB),DX MOVQ $REDMASK51,DX
SHLQ $13,CX:SI SHLQ $13,CX:SI
ANDQ DX,SI ANDQ DX,SI
SHLQ $13,R9:R8 SHLQ $13,R9:R8
@ -728,7 +730,7 @@ TEXT ·ladderstep(SB),0,$296-8
MULQ 152(DI) MULQ 152(DI)
ADDQ AX,R12 ADDQ AX,R12
ADCQ DX,R13 ADCQ DX,R13
MOVQ ·REDMASK51(SB),DX MOVQ $REDMASK51,DX
SHLQ $13,CX:SI SHLQ $13,CX:SI
ANDQ DX,SI ANDQ DX,SI
SHLQ $13,R9:R8 SHLQ $13,R9:R8
@ -843,7 +845,7 @@ TEXT ·ladderstep(SB),0,$296-8
MULQ 192(DI) MULQ 192(DI)
ADDQ AX,R12 ADDQ AX,R12
ADCQ DX,R13 ADCQ DX,R13
MOVQ ·REDMASK51(SB),DX MOVQ $REDMASK51,DX
SHLQ $13,CX:SI SHLQ $13,CX:SI
ANDQ DX,SI ANDQ DX,SI
SHLQ $13,R9:R8 SHLQ $13,R9:R8
@ -993,7 +995,7 @@ TEXT ·ladderstep(SB),0,$296-8
MULQ 32(DI) MULQ 32(DI)
ADDQ AX,R12 ADDQ AX,R12
ADCQ DX,R13 ADCQ DX,R13
MOVQ ·REDMASK51(SB),DX MOVQ $REDMASK51,DX
SHLQ $13,CX:SI SHLQ $13,CX:SI
ANDQ DX,SI ANDQ DX,SI
SHLQ $13,R9:R8 SHLQ $13,R9:R8
@ -1143,7 +1145,7 @@ TEXT ·ladderstep(SB),0,$296-8
MULQ 112(SP) MULQ 112(SP)
ADDQ AX,R12 ADDQ AX,R12
ADCQ DX,R13 ADCQ DX,R13
MOVQ ·REDMASK51(SB),DX MOVQ $REDMASK51,DX
SHLQ $13,CX:SI SHLQ $13,CX:SI
ANDQ DX,SI ANDQ DX,SI
SHLQ $13,R9:R8 SHLQ $13,R9:R8
@ -1329,7 +1331,7 @@ TEXT ·ladderstep(SB),0,$296-8
MULQ 192(SP) MULQ 192(SP)
ADDQ AX,R12 ADDQ AX,R12
ADCQ DX,R13 ADCQ DX,R13
MOVQ ·REDMASK51(SB),DX MOVQ $REDMASK51,DX
SHLQ $13,CX:SI SHLQ $13,CX:SI
ANDQ DX,SI ANDQ DX,SI
SHLQ $13,R9:R8 SHLQ $13,R9:R8

6
vendor/golang.org/x/crypto/curve25519/mul_amd64.s generated vendored
View file

@ -3,10 +3,12 @@
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// This code was translated into a form compatible with 6a from the public // This code was translated into a form compatible with 6a from the public
// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html // domain sources in SUPERCOP: https://bench.cr.yp.to/supercop.html
// +build amd64,!gccgo,!appengine // +build amd64,!gccgo,!appengine
#include "const_amd64.h"
// func mul(dest, a, b *[5]uint64) // func mul(dest, a, b *[5]uint64)
TEXT ·mul(SB),0,$16-24 TEXT ·mul(SB),0,$16-24
MOVQ dest+0(FP), DI MOVQ dest+0(FP), DI
@ -121,7 +123,7 @@ TEXT ·mul(SB),0,$16-24
MULQ 32(CX) MULQ 32(CX)
ADDQ AX,R14 ADDQ AX,R14
ADCQ DX,R15 ADCQ DX,R15
MOVQ ·REDMASK51(SB),SI MOVQ $REDMASK51,SI
SHLQ $13,R9:R8 SHLQ $13,R9:R8
ANDQ SI,R8 ANDQ SI,R8
SHLQ $13,R11:R10 SHLQ $13,R11:R10

6
vendor/golang.org/x/crypto/curve25519/square_amd64.s generated vendored
View file

@ -3,10 +3,12 @@
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// This code was translated into a form compatible with 6a from the public // This code was translated into a form compatible with 6a from the public
// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html // domain sources in SUPERCOP: https://bench.cr.yp.to/supercop.html
// +build amd64,!gccgo,!appengine // +build amd64,!gccgo,!appengine
#include "const_amd64.h"
// func square(out, in *[5]uint64) // func square(out, in *[5]uint64)
TEXT ·square(SB),7,$0-16 TEXT ·square(SB),7,$0-16
MOVQ out+0(FP), DI MOVQ out+0(FP), DI
@ -84,7 +86,7 @@ TEXT ·square(SB),7,$0-16
MULQ 32(SI) MULQ 32(SI)
ADDQ AX,R13 ADDQ AX,R13
ADCQ DX,R14 ADCQ DX,R14
MOVQ ·REDMASK51(SB),SI MOVQ $REDMASK51,SI
SHLQ $13,R8:CX SHLQ $13,R8:CX
ANDQ SI,CX ANDQ SI,CX
SHLQ $13,R10:R9 SHLQ $13,R10:R9

8
vendor/golang.org/x/crypto/ed25519/ed25519.go generated vendored
View file

@ -3,20 +3,20 @@
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// Package ed25519 implements the Ed25519 signature algorithm. See // Package ed25519 implements the Ed25519 signature algorithm. See
// http://ed25519.cr.yp.to/. // https://ed25519.cr.yp.to/.
// //
// These functions are also compatible with the “Ed25519” function defined in // These functions are also compatible with the “Ed25519” function defined in
// https://tools.ietf.org/html/draft-irtf-cfrg-eddsa-05. // RFC 8032.
package ed25519 package ed25519
// This code is a port of the public domain, “ref10” implementation of ed25519 // This code is a port of the public domain, “ref10” implementation of ed25519
// from SUPERCOP. // from SUPERCOP.
import ( import (
"bytes"
"crypto" "crypto"
cryptorand "crypto/rand" cryptorand "crypto/rand"
"crypto/sha512" "crypto/sha512"
"crypto/subtle"
"errors" "errors"
"io" "io"
"strconv" "strconv"
@ -177,5 +177,5 @@ func Verify(publicKey PublicKey, message, sig []byte) bool {
var checkR [32]byte var checkR [32]byte
R.ToBytes(&checkR) R.ToBytes(&checkR)
return subtle.ConstantTimeCompare(sig[:32], checkR[:]) == 1 return bytes.Equal(sig[:32], checkR[:])
} }

5
vendor/golang.org/x/crypto/ssh/buffer.go generated vendored
View file

@ -51,13 +51,12 @@ func (b *buffer) write(buf []byte) {
} }
// eof closes the buffer. Reads from the buffer once all // eof closes the buffer. Reads from the buffer once all
// the data has been consumed will receive os.EOF. // the data has been consumed will receive io.EOF.
func (b *buffer) eof() error { func (b *buffer) eof() {
b.Cond.L.Lock() b.Cond.L.Lock()
b.closed = true b.closed = true
b.Cond.Signal() b.Cond.Signal()
b.Cond.L.Unlock() b.Cond.L.Unlock()
return nil
} }
// Read reads data from the internal buffer in buf. Reads will block // Read reads data from the internal buffer in buf. Reads will block

36
vendor/golang.org/x/crypto/ssh/certs.go generated vendored
View file

@ -251,10 +251,18 @@ type CertChecker struct {
// for user certificates. // for user certificates.
SupportedCriticalOptions []string SupportedCriticalOptions []string
// IsAuthority should return true if the key is recognized as // IsUserAuthority should return true if the key is recognized as an
// an authority. This allows for certificates to be signed by other // authority for the given user certificate. This allows for
// certificates. // certificates to be signed by other certificates. This must be set
IsAuthority func(auth PublicKey) bool // if this CertChecker will be checking user certificates.
IsUserAuthority func(auth PublicKey) bool
// IsHostAuthority should report whether the key is recognized as
// an authority for this host. This allows for certificates to be
// signed by other keys, and for those other keys to only be valid
// signers for particular hostnames. This must be set if this
// CertChecker will be checking host certificates.
IsHostAuthority func(auth PublicKey, address string) bool
// Clock is used for verifying time stamps. If nil, time.Now // Clock is used for verifying time stamps. If nil, time.Now
// is used. // is used.
@ -268,7 +276,7 @@ type CertChecker struct {
// HostKeyFallback is called when CertChecker.CheckHostKey encounters a // HostKeyFallback is called when CertChecker.CheckHostKey encounters a
// public key that is not a certificate. It must implement host key // public key that is not a certificate. It must implement host key
// validation or else, if nil, all such keys are rejected. // validation or else, if nil, all such keys are rejected.
HostKeyFallback func(addr string, remote net.Addr, key PublicKey) error HostKeyFallback HostKeyCallback
// IsRevoked is called for each certificate so that revocation checking // IsRevoked is called for each certificate so that revocation checking
// can be implemented. It should return true if the given certificate // can be implemented. It should return true if the given certificate
@ -290,8 +298,17 @@ func (c *CertChecker) CheckHostKey(addr string, remote net.Addr, key PublicKey)
if cert.CertType != HostCert { if cert.CertType != HostCert {
return fmt.Errorf("ssh: certificate presented as a host key has type %d", cert.CertType) return fmt.Errorf("ssh: certificate presented as a host key has type %d", cert.CertType)
} }
if !c.IsHostAuthority(cert.SignatureKey, addr) {
return fmt.Errorf("ssh: no authorities for hostname: %v", addr)
}
return c.CheckCert(addr, cert) hostname, _, err := net.SplitHostPort(addr)
if err != nil {
return err
}
// Pass hostname only as principal for host certificates (consistent with OpenSSH)
return c.CheckCert(hostname, cert)
} }
// Authenticate checks a user certificate. Authenticate can be used as // Authenticate checks a user certificate. Authenticate can be used as
@ -308,6 +325,9 @@ func (c *CertChecker) Authenticate(conn ConnMetadata, pubKey PublicKey) (*Permis
if cert.CertType != UserCert { if cert.CertType != UserCert {
return nil, fmt.Errorf("ssh: cert has type %d", cert.CertType) return nil, fmt.Errorf("ssh: cert has type %d", cert.CertType)
} }
if !c.IsUserAuthority(cert.SignatureKey) {
return nil, fmt.Errorf("ssh: certificate signed by unrecognized authority")
}
if err := c.CheckCert(conn.User(), cert); err != nil { if err := c.CheckCert(conn.User(), cert); err != nil {
return nil, err return nil, err
@ -356,10 +376,6 @@ func (c *CertChecker) CheckCert(principal string, cert *Certificate) error {
} }
} }
if !c.IsAuthority(cert.SignatureKey) {
return fmt.Errorf("ssh: certificate signed by unrecognized authority")
}
clock := c.Clock clock := c.Clock
if clock == nil { if clock == nil {
clock = time.Now clock = time.Now

4
vendor/golang.org/x/crypto/ssh/channel.go generated vendored
View file

@ -461,8 +461,8 @@ func (m *mux) newChannel(chanType string, direction channelDirection, extraData
pending: newBuffer(), pending: newBuffer(),
extPending: newBuffer(), extPending: newBuffer(),
direction: direction, direction: direction,
incomingRequests: make(chan *Request, 16), incomingRequests: make(chan *Request, chanSize),
msg: make(chan interface{}, 16), msg: make(chan interface{}, chanSize),
chanType: chanType, chanType: chanType,
extraData: extraData, extraData: extraData,
mux: m, mux: m,

70
vendor/golang.org/x/crypto/ssh/cipher.go generated vendored
View file

@ -135,6 +135,7 @@ const prefixLen = 5
type streamPacketCipher struct { type streamPacketCipher struct {
mac hash.Hash mac hash.Hash
cipher cipher.Stream cipher cipher.Stream
etm bool
// The following members are to avoid per-packet allocations. // The following members are to avoid per-packet allocations.
prefix [prefixLen]byte prefix [prefixLen]byte
@ -150,7 +151,14 @@ func (s *streamPacketCipher) readPacket(seqNum uint32, r io.Reader) ([]byte, err
return nil, err return nil, err
} }
s.cipher.XORKeyStream(s.prefix[:], s.prefix[:]) var encryptedPaddingLength [1]byte
if s.mac != nil && s.etm {
copy(encryptedPaddingLength[:], s.prefix[4:5])
s.cipher.XORKeyStream(s.prefix[4:5], s.prefix[4:5])
} else {
s.cipher.XORKeyStream(s.prefix[:], s.prefix[:])
}
length := binary.BigEndian.Uint32(s.prefix[0:4]) length := binary.BigEndian.Uint32(s.prefix[0:4])
paddingLength := uint32(s.prefix[4]) paddingLength := uint32(s.prefix[4])
@ -159,7 +167,12 @@ func (s *streamPacketCipher) readPacket(seqNum uint32, r io.Reader) ([]byte, err
s.mac.Reset() s.mac.Reset()
binary.BigEndian.PutUint32(s.seqNumBytes[:], seqNum) binary.BigEndian.PutUint32(s.seqNumBytes[:], seqNum)
s.mac.Write(s.seqNumBytes[:]) s.mac.Write(s.seqNumBytes[:])
s.mac.Write(s.prefix[:]) if s.etm {
s.mac.Write(s.prefix[:4])
s.mac.Write(encryptedPaddingLength[:])
} else {
s.mac.Write(s.prefix[:])
}
macSize = uint32(s.mac.Size()) macSize = uint32(s.mac.Size())
} }
@ -184,10 +197,17 @@ func (s *streamPacketCipher) readPacket(seqNum uint32, r io.Reader) ([]byte, err
} }
mac := s.packetData[length-1:] mac := s.packetData[length-1:]
data := s.packetData[:length-1] data := s.packetData[:length-1]
if s.mac != nil && s.etm {
s.mac.Write(data)
}
s.cipher.XORKeyStream(data, data) s.cipher.XORKeyStream(data, data)
if s.mac != nil { if s.mac != nil {
s.mac.Write(data) if !s.etm {
s.mac.Write(data)
}
s.macResult = s.mac.Sum(s.macResult[:0]) s.macResult = s.mac.Sum(s.macResult[:0])
if subtle.ConstantTimeCompare(s.macResult, mac) != 1 { if subtle.ConstantTimeCompare(s.macResult, mac) != 1 {
return nil, errors.New("ssh: MAC failure") return nil, errors.New("ssh: MAC failure")
@ -203,7 +223,13 @@ func (s *streamPacketCipher) writePacket(seqNum uint32, w io.Writer, rand io.Rea
return errors.New("ssh: packet too large") return errors.New("ssh: packet too large")
} }
paddingLength := packetSizeMultiple - (prefixLen+len(packet))%packetSizeMultiple aadlen := 0
if s.mac != nil && s.etm {
// packet length is not encrypted for EtM modes
aadlen = 4
}
paddingLength := packetSizeMultiple - (prefixLen+len(packet)-aadlen)%packetSizeMultiple
if paddingLength < 4 { if paddingLength < 4 {
paddingLength += packetSizeMultiple paddingLength += packetSizeMultiple
} }
@ -220,15 +246,37 @@ func (s *streamPacketCipher) writePacket(seqNum uint32, w io.Writer, rand io.Rea
s.mac.Reset() s.mac.Reset()
binary.BigEndian.PutUint32(s.seqNumBytes[:], seqNum) binary.BigEndian.PutUint32(s.seqNumBytes[:], seqNum)
s.mac.Write(s.seqNumBytes[:]) s.mac.Write(s.seqNumBytes[:])
if s.etm {
// For EtM algorithms, the packet length must stay unencrypted,
// but the following data (padding length) must be encrypted
s.cipher.XORKeyStream(s.prefix[4:5], s.prefix[4:5])
}
s.mac.Write(s.prefix[:]) s.mac.Write(s.prefix[:])
if !s.etm {
// For non-EtM algorithms, the algorithm is applied on unencrypted data
s.mac.Write(packet)
s.mac.Write(padding)
}
}
if !(s.mac != nil && s.etm) {
// For EtM algorithms, the padding length has already been encrypted
// and the packet length must remain unencrypted
s.cipher.XORKeyStream(s.prefix[:], s.prefix[:])
}
s.cipher.XORKeyStream(packet, packet)
s.cipher.XORKeyStream(padding, padding)
if s.mac != nil && s.etm {
// For EtM algorithms, packet and padding must be encrypted
s.mac.Write(packet) s.mac.Write(packet)
s.mac.Write(padding) s.mac.Write(padding)
} }
s.cipher.XORKeyStream(s.prefix[:], s.prefix[:])
s.cipher.XORKeyStream(packet, packet)
s.cipher.XORKeyStream(padding, padding)
if _, err := w.Write(s.prefix[:]); err != nil { if _, err := w.Write(s.prefix[:]); err != nil {
return err return err
} }
@ -256,7 +304,7 @@ type gcmCipher struct {
buf []byte buf []byte
} }
func newGCMCipher(iv, key, macKey []byte) (packetCipher, error) { func newGCMCipher(iv, key []byte) (packetCipher, error) {
c, err := aes.NewCipher(key) c, err := aes.NewCipher(key)
if err != nil { if err != nil {
return nil, err return nil, err
@ -344,7 +392,9 @@ func (c *gcmCipher) readPacket(seqNum uint32, r io.Reader) ([]byte, error) {
c.incIV() c.incIV()
padding := plain[0] padding := plain[0]
if padding < 4 || padding >= 20 { if padding < 4 {
// padding is a byte, so it automatically satisfies
// the maximum size, which is 255.
return nil, fmt.Errorf("ssh: illegal padding %d", padding) return nil, fmt.Errorf("ssh: illegal padding %d", padding)
} }

83
vendor/golang.org/x/crypto/ssh/client.go generated vendored
View file

@ -5,15 +5,17 @@
package ssh package ssh
import ( import (
"bytes"
"errors" "errors"
"fmt" "fmt"
"net" "net"
"os"
"sync" "sync"
"time" "time"
) )
// Client implements a traditional SSH client that supports shells, // Client implements a traditional SSH client that supports shells,
// subprocesses, port forwarding and tunneled dialing. // subprocesses, TCP port/streamlocal forwarding and tunneled dialing.
type Client struct { type Client struct {
Conn Conn
@ -40,7 +42,7 @@ func (c *Client) HandleChannelOpen(channelType string) <-chan NewChannel {
return nil return nil
} }
ch = make(chan NewChannel, 16) ch = make(chan NewChannel, chanSize)
c.channelHandlers[channelType] = ch c.channelHandlers[channelType] = ch
return ch return ch
} }
@ -59,6 +61,7 @@ func NewClient(c Conn, chans <-chan NewChannel, reqs <-chan *Request) *Client {
conn.forwards.closeAll() conn.forwards.closeAll()
}() }()
go conn.forwards.handleChannels(conn.HandleChannelOpen("forwarded-tcpip")) go conn.forwards.handleChannels(conn.HandleChannelOpen("forwarded-tcpip"))
go conn.forwards.handleChannels(conn.HandleChannelOpen("forwarded-streamlocal@openssh.com"))
return conn return conn
} }
@ -68,6 +71,11 @@ func NewClient(c Conn, chans <-chan NewChannel, reqs <-chan *Request) *Client {
func NewClientConn(c net.Conn, addr string, config *ClientConfig) (Conn, <-chan NewChannel, <-chan *Request, error) { func NewClientConn(c net.Conn, addr string, config *ClientConfig) (Conn, <-chan NewChannel, <-chan *Request, error) {
fullConf := *config fullConf := *config
fullConf.SetDefaults() fullConf.SetDefaults()
if fullConf.HostKeyCallback == nil {
c.Close()
return nil, nil, nil, errors.New("ssh: must specify HostKeyCallback")
}
conn := &connection{ conn := &connection{
sshConn: sshConn{conn: c}, sshConn: sshConn{conn: c},
} }
@ -97,13 +105,11 @@ func (c *connection) clientHandshake(dialAddress string, config *ClientConfig) e
c.transport = newClientTransport( c.transport = newClientTransport(
newTransport(c.sshConn.conn, config.Rand, true /* is client */), newTransport(c.sshConn.conn, config.Rand, true /* is client */),
c.clientVersion, c.serverVersion, config, dialAddress, c.sshConn.RemoteAddr()) c.clientVersion, c.serverVersion, config, dialAddress, c.sshConn.RemoteAddr())
if err := c.transport.requestInitialKeyChange(); err != nil { if err := c.transport.waitSession(); err != nil {
return err return err
} }
// We just did the key change, so the session ID is established.
c.sessionID = c.transport.getSessionID() c.sessionID = c.transport.getSessionID()
return c.clientAuthenticate(config) return c.clientAuthenticate(config)
} }
@ -175,6 +181,17 @@ func Dial(network, addr string, config *ClientConfig) (*Client, error) {
return NewClient(c, chans, reqs), nil return NewClient(c, chans, reqs), nil
} }
// HostKeyCallback is the function type used for verifying server
// keys. A HostKeyCallback must return nil if the host key is OK, or
// an error to reject it. It receives the hostname as passed to Dial
// or NewClientConn. The remote address is the RemoteAddr of the
// net.Conn underlying the the SSH connection.
type HostKeyCallback func(hostname string, remote net.Addr, key PublicKey) error
// BannerCallback is the function type used for treat the banner sent by
// the server. A BannerCallback receives the message sent by the remote server.
type BannerCallback func(message string) error
// A ClientConfig structure is used to configure a Client. It must not be // A ClientConfig structure is used to configure a Client. It must not be
// modified after having been passed to an SSH function. // modified after having been passed to an SSH function.
type ClientConfig struct { type ClientConfig struct {
@ -190,10 +207,18 @@ type ClientConfig struct {
// be used during authentication. // be used during authentication.
Auth []AuthMethod Auth []AuthMethod
// HostKeyCallback, if not nil, is called during the cryptographic // HostKeyCallback is called during the cryptographic
// handshake to validate the server's host key. A nil HostKeyCallback // handshake to validate the server's host key. The client
// implies that all host keys are accepted. // configuration must supply this callback for the connection
HostKeyCallback func(hostname string, remote net.Addr, key PublicKey) error // to succeed. The functions InsecureIgnoreHostKey or
// FixedHostKey can be used for simplistic host key checks.
HostKeyCallback HostKeyCallback
// BannerCallback is called during the SSH dance to display a custom
// server's message. The client configuration can supply this callback to
// handle it as wished. The function BannerDisplayStderr can be used for
// simplistic display on Stderr.
BannerCallback BannerCallback
// ClientVersion contains the version identification string that will // ClientVersion contains the version identification string that will
// be used for the connection. If empty, a reasonable default is used. // be used for the connection. If empty, a reasonable default is used.
@ -211,3 +236,43 @@ type ClientConfig struct {
// A Timeout of zero means no timeout. // A Timeout of zero means no timeout.
Timeout time.Duration Timeout time.Duration
} }
// InsecureIgnoreHostKey returns a function that can be used for
// ClientConfig.HostKeyCallback to accept any host key. It should
// not be used for production code.
func InsecureIgnoreHostKey() HostKeyCallback {
return func(hostname string, remote net.Addr, key PublicKey) error {
return nil
}
}
type fixedHostKey struct {
key PublicKey
}
func (f *fixedHostKey) check(hostname string, remote net.Addr, key PublicKey) error {
if f.key == nil {
return fmt.Errorf("ssh: required host key was nil")
}
if !bytes.Equal(key.Marshal(), f.key.Marshal()) {
return fmt.Errorf("ssh: host key mismatch")
}
return nil
}
// FixedHostKey returns a function for use in
// ClientConfig.HostKeyCallback to accept only a specific host key.
func FixedHostKey(key PublicKey) HostKeyCallback {
hk := &fixedHostKey{key}
return hk.check
}
// BannerDisplayStderr returns a function that can be used for
// ClientConfig.BannerCallback to display banners on os.Stderr.
func BannerDisplayStderr() BannerCallback {
return func(banner string) error {
_, err := os.Stderr.WriteString(banner)
return err
}
}

85
vendor/golang.org/x/crypto/ssh/client_auth.go generated vendored
View file

@ -30,8 +30,10 @@ func (c *connection) clientAuthenticate(config *ClientConfig) error {
// then any untried methods suggested by the server. // then any untried methods suggested by the server.
tried := make(map[string]bool) tried := make(map[string]bool)
var lastMethods []string var lastMethods []string
sessionID := c.transport.getSessionID()
for auth := AuthMethod(new(noneAuth)); auth != nil; { for auth := AuthMethod(new(noneAuth)); auth != nil; {
ok, methods, err := auth.auth(c.transport.getSessionID(), config.User, c.transport, config.Rand) ok, methods, err := auth.auth(sessionID, config.User, c.transport, config.Rand)
if err != nil { if err != nil {
return err return err
} }
@ -177,31 +179,26 @@ func (cb publicKeyCallback) method() string {
} }
func (cb publicKeyCallback) auth(session []byte, user string, c packetConn, rand io.Reader) (bool, []string, error) { func (cb publicKeyCallback) auth(session []byte, user string, c packetConn, rand io.Reader) (bool, []string, error) {
// Authentication is performed in two stages. The first stage sends an // Authentication is performed by sending an enquiry to test if a key is
// enquiry to test if each key is acceptable to the remote. The second // acceptable to the remote. If the key is acceptable, the client will
// stage attempts to authenticate with the valid keys obtained in the // attempt to authenticate with the valid key. If not the client will repeat
// first stage. // the process with the remaining keys.
signers, err := cb() signers, err := cb()
if err != nil { if err != nil {
return false, nil, err return false, nil, err
} }
var validKeys []Signer
for _, signer := range signers {
if ok, err := validateKey(signer.PublicKey(), user, c); ok {
validKeys = append(validKeys, signer)
} else {
if err != nil {
return false, nil, err
}
}
}
// methods that may continue if this auth is not successful.
var methods []string var methods []string
for _, signer := range validKeys { for _, signer := range signers {
pub := signer.PublicKey() ok, err := validateKey(signer.PublicKey(), user, c)
if err != nil {
return false, nil, err
}
if !ok {
continue
}
pub := signer.PublicKey()
pubKey := pub.Marshal() pubKey := pub.Marshal()
sign, err := signer.Sign(rand, buildDataSignedForAuth(session, userAuthRequestMsg{ sign, err := signer.Sign(rand, buildDataSignedForAuth(session, userAuthRequestMsg{
User: user, User: user,
@ -234,13 +231,29 @@ func (cb publicKeyCallback) auth(session []byte, user string, c packetConn, rand
if err != nil { if err != nil {
return false, nil, err return false, nil, err
} }
if success {
// If authentication succeeds or the list of available methods does not
// contain the "publickey" method, do not attempt to authenticate with any
// other keys. According to RFC 4252 Section 7, the latter can occur when
// additional authentication methods are required.
if success || !containsMethod(methods, cb.method()) {
return success, methods, err return success, methods, err
} }
} }
return false, methods, nil return false, methods, nil
} }
func containsMethod(methods []string, method string) bool {
for _, m := range methods {
if m == method {
return true
}
}
return false
}
// validateKey validates the key provided is acceptable to the server. // validateKey validates the key provided is acceptable to the server.
func validateKey(key PublicKey, user string, c packetConn) (bool, error) { func validateKey(key PublicKey, user string, c packetConn) (bool, error) {
pubKey := key.Marshal() pubKey := key.Marshal()
@ -270,7 +283,9 @@ func confirmKeyAck(key PublicKey, c packetConn) (bool, error) {
} }
switch packet[0] { switch packet[0] {
case msgUserAuthBanner: case msgUserAuthBanner:
// TODO(gpaul): add callback to present the banner to the user if err := handleBannerResponse(c, packet); err != nil {
return false, err
}
case msgUserAuthPubKeyOk: case msgUserAuthPubKeyOk:
var msg userAuthPubKeyOkMsg var msg userAuthPubKeyOkMsg
if err := Unmarshal(packet, &msg); err != nil { if err := Unmarshal(packet, &msg); err != nil {
@ -312,7 +327,9 @@ func handleAuthResponse(c packetConn) (bool, []string, error) {
switch packet[0] { switch packet[0] {
case msgUserAuthBanner: case msgUserAuthBanner:
// TODO: add callback to present the banner to the user if err := handleBannerResponse(c, packet); err != nil {
return false, nil, err
}
case msgUserAuthFailure: case msgUserAuthFailure:
var msg userAuthFailureMsg var msg userAuthFailureMsg
if err := Unmarshal(packet, &msg); err != nil { if err := Unmarshal(packet, &msg); err != nil {
@ -327,6 +344,24 @@ func handleAuthResponse(c packetConn) (bool, []string, error) {
} }
} }
func handleBannerResponse(c packetConn, packet []byte) error {
var msg userAuthBannerMsg
if err := Unmarshal(packet, &msg); err != nil {
return err
}
transport, ok := c.(*handshakeTransport)
if !ok {
return nil
}
if transport.bannerCallback != nil {
return transport.bannerCallback(msg.Message)
}
return nil
}
// KeyboardInteractiveChallenge should print questions, optionally // KeyboardInteractiveChallenge should print questions, optionally
// disabling echoing (e.g. for passwords), and return all the answers. // disabling echoing (e.g. for passwords), and return all the answers.
// Challenge may be called multiple times in a single session. After // Challenge may be called multiple times in a single session. After
@ -336,7 +371,7 @@ func handleAuthResponse(c packetConn) (bool, []string, error) {
// both CLI and GUI environments. // both CLI and GUI environments.
type KeyboardInteractiveChallenge func(user, instruction string, questions []string, echos []bool) (answers []string, err error) type KeyboardInteractiveChallenge func(user, instruction string, questions []string, echos []bool) (answers []string, err error)
// KeyboardInteractive returns a AuthMethod using a prompt/response // KeyboardInteractive returns an AuthMethod using a prompt/response
// sequence controlled by the server. // sequence controlled by the server.
func KeyboardInteractive(challenge KeyboardInteractiveChallenge) AuthMethod { func KeyboardInteractive(challenge KeyboardInteractiveChallenge) AuthMethod {
return challenge return challenge
@ -372,7 +407,9 @@ func (cb KeyboardInteractiveChallenge) auth(session []byte, user string, c packe
// like handleAuthResponse, but with less options. // like handleAuthResponse, but with less options.
switch packet[0] { switch packet[0] {
case msgUserAuthBanner: case msgUserAuthBanner:
// TODO: Print banners during userauth. if err := handleBannerResponse(c, packet); err != nil {
return false, nil, err
}
continue continue
case msgUserAuthInfoRequest: case msgUserAuthInfoRequest:
// OK // OK

31
vendor/golang.org/x/crypto/ssh/common.go generated vendored
View file

@ -9,6 +9,7 @@ import (
"crypto/rand" "crypto/rand"
"fmt" "fmt"
"io" "io"
"math"
"sync" "sync"
_ "crypto/sha1" _ "crypto/sha1"
@ -40,7 +41,7 @@ var supportedKexAlgos = []string{
kexAlgoDH14SHA1, kexAlgoDH1SHA1, kexAlgoDH14SHA1, kexAlgoDH1SHA1,
} }
// supportedKexAlgos specifies the supported host-key algorithms (i.e. methods // supportedHostKeyAlgos specifies the supported host-key algorithms (i.e. methods
// of authenticating servers) in preference order. // of authenticating servers) in preference order.
var supportedHostKeyAlgos = []string{ var supportedHostKeyAlgos = []string{
CertAlgoRSAv01, CertAlgoDSAv01, CertAlgoECDSA256v01, CertAlgoRSAv01, CertAlgoDSAv01, CertAlgoECDSA256v01,
@ -56,7 +57,7 @@ var supportedHostKeyAlgos = []string{
// This is based on RFC 4253, section 6.4, but with hmac-md5 variants removed // This is based on RFC 4253, section 6.4, but with hmac-md5 variants removed
// because they have reached the end of their useful life. // because they have reached the end of their useful life.
var supportedMACs = []string{ var supportedMACs = []string{
"hmac-sha2-256", "hmac-sha1", "hmac-sha1-96", "hmac-sha2-256-etm@openssh.com", "hmac-sha2-256", "hmac-sha1", "hmac-sha1-96",
} }
var supportedCompressions = []string{compressionNone} var supportedCompressions = []string{compressionNone}
@ -104,6 +105,21 @@ type directionAlgorithms struct {
Compression string Compression string
} }
// rekeyBytes returns a rekeying intervals in bytes.
func (a *directionAlgorithms) rekeyBytes() int64 {
// According to RFC4344 block ciphers should rekey after
// 2^(BLOCKSIZE/4) blocks. For all AES flavors BLOCKSIZE is
// 128.
switch a.Cipher {
case "aes128-ctr", "aes192-ctr", "aes256-ctr", gcmCipherID, aes128cbcID:
return 16 * (1 << 32)
}
// For others, stick with RFC4253 recommendation to rekey after 1 Gb of data.
return 1 << 30
}
type algorithms struct { type algorithms struct {
kex string kex string
hostKey string hostKey string
@ -171,7 +187,7 @@ type Config struct {
// The maximum number of bytes sent or received after which a // The maximum number of bytes sent or received after which a
// new key is negotiated. It must be at least 256. If // new key is negotiated. It must be at least 256. If
// unspecified, 1 gigabyte is used. // unspecified, a size suitable for the chosen cipher is used.
RekeyThreshold uint64 RekeyThreshold uint64
// The allowed key exchanges algorithms. If unspecified then a // The allowed key exchanges algorithms. If unspecified then a
@ -215,11 +231,12 @@ func (c *Config) SetDefaults() {
} }
if c.RekeyThreshold == 0 { if c.RekeyThreshold == 0 {
// RFC 4253, section 9 suggests rekeying after 1G. // cipher specific default
c.RekeyThreshold = 1 << 30 } else if c.RekeyThreshold < minRekeyThreshold {
}
if c.RekeyThreshold < minRekeyThreshold {
c.RekeyThreshold = minRekeyThreshold c.RekeyThreshold = minRekeyThreshold
} else if c.RekeyThreshold >= math.MaxInt64 {
// Avoid weirdness if somebody uses -1 as a threshold.
c.RekeyThreshold = math.MaxInt64
} }
} }

2
vendor/golang.org/x/crypto/ssh/connection.go generated vendored
View file

@ -25,7 +25,7 @@ type ConnMetadata interface {
// User returns the user ID for this connection. // User returns the user ID for this connection.
User() string User() string
// SessionID returns the sesson hash, also denoted by H. // SessionID returns the session hash, also denoted by H.
SessionID() []byte SessionID() []byte
// ClientVersion returns the client's version string as hashed // ClientVersion returns the client's version string as hashed

3
vendor/golang.org/x/crypto/ssh/doc.go generated vendored
View file

@ -14,5 +14,8 @@ others.
References: References:
[PROTOCOL.certkeys]: http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/PROTOCOL.certkeys?rev=HEAD [PROTOCOL.certkeys]: http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/PROTOCOL.certkeys?rev=HEAD
[SSH-PARAMETERS]: http://www.iana.org/assignments/ssh-parameters/ssh-parameters.xml#ssh-parameters-1 [SSH-PARAMETERS]: http://www.iana.org/assignments/ssh-parameters/ssh-parameters.xml#ssh-parameters-1
This package does not fall under the stability promise of the Go language itself,
so its API may be changed when pressing needs arise.
*/ */
package ssh // import "golang.org/x/crypto/ssh" package ssh // import "golang.org/x/crypto/ssh"

468
vendor/golang.org/x/crypto/ssh/handshake.go generated vendored
View file

@ -19,6 +19,11 @@ import (
// messages are wrong when using ECDH. // messages are wrong when using ECDH.
const debugHandshake = false const debugHandshake = false
// chanSize sets the amount of buffering SSH connections. This is
// primarily for testing: setting chanSize=0 uncovers deadlocks more
// quickly.
const chanSize = 16
// keyingTransport is a packet based transport that supports key // keyingTransport is a packet based transport that supports key
// changes. It need not be thread-safe. It should pass through // changes. It need not be thread-safe. It should pass through
// msgNewKeys in both directions. // msgNewKeys in both directions.
@ -53,34 +58,65 @@ type handshakeTransport struct {
incoming chan []byte incoming chan []byte
readError error readError error
mu sync.Mutex
writeError error
sentInitPacket []byte
sentInitMsg *kexInitMsg
pendingPackets [][]byte // Used when a key exchange is in progress.
// If the read loop wants to schedule a kex, it pings this
// channel, and the write loop will send out a kex
// message.
requestKex chan struct{}
// If the other side requests or confirms a kex, its kexInit
// packet is sent here for the write loop to find it.
startKex chan *pendingKex
// data for host key checking // data for host key checking
hostKeyCallback func(hostname string, remote net.Addr, key PublicKey) error hostKeyCallback HostKeyCallback
dialAddress string dialAddress string
remoteAddr net.Addr remoteAddr net.Addr
readSinceKex uint64 // bannerCallback is non-empty if we are the client and it has been set in
// ClientConfig. In that case it is called during the user authentication
// dance to handle a custom server's message.
bannerCallback BannerCallback
// Protects the writing side of the connection // Algorithms agreed in the last key exchange.
mu sync.Mutex algorithms *algorithms
cond *sync.Cond
sentInitPacket []byte readPacketsLeft uint32
sentInitMsg *kexInitMsg readBytesLeft int64
writtenSinceKex uint64
writeError error writePacketsLeft uint32
writeBytesLeft int64
// The session ID or nil if first kex did not complete yet. // The session ID or nil if first kex did not complete yet.
sessionID []byte sessionID []byte
} }
type pendingKex struct {
otherInit []byte
done chan error
}
func newHandshakeTransport(conn keyingTransport, config *Config, clientVersion, serverVersion []byte) *handshakeTransport { func newHandshakeTransport(conn keyingTransport, config *Config, clientVersion, serverVersion []byte) *handshakeTransport {
t := &handshakeTransport{ t := &handshakeTransport{
conn: conn, conn: conn,
serverVersion: serverVersion, serverVersion: serverVersion,
clientVersion: clientVersion, clientVersion: clientVersion,
incoming: make(chan []byte, 16), incoming: make(chan []byte, chanSize),
config: config, requestKex: make(chan struct{}, 1),
startKex: make(chan *pendingKex, 1),
config: config,
} }
t.cond = sync.NewCond(&t.mu) t.resetReadThresholds()
t.resetWriteThresholds()
// We always start with a mandatory key exchange.
t.requestKex <- struct{}{}
return t return t
} }
@ -89,12 +125,14 @@ func newClientTransport(conn keyingTransport, clientVersion, serverVersion []byt
t.dialAddress = dialAddr t.dialAddress = dialAddr
t.remoteAddr = addr t.remoteAddr = addr
t.hostKeyCallback = config.HostKeyCallback t.hostKeyCallback = config.HostKeyCallback
t.bannerCallback = config.BannerCallback
if config.HostKeyAlgorithms != nil { if config.HostKeyAlgorithms != nil {
t.hostKeyAlgorithms = config.HostKeyAlgorithms t.hostKeyAlgorithms = config.HostKeyAlgorithms
} else { } else {
t.hostKeyAlgorithms = supportedHostKeyAlgos t.hostKeyAlgorithms = supportedHostKeyAlgos
} }
go t.readLoop() go t.readLoop()
go t.kexLoop()
return t return t
} }
@ -102,6 +140,7 @@ func newServerTransport(conn keyingTransport, clientVersion, serverVersion []byt
t := newHandshakeTransport(conn, &config.Config, clientVersion, serverVersion) t := newHandshakeTransport(conn, &config.Config, clientVersion, serverVersion)
t.hostKeys = config.hostKeys t.hostKeys = config.hostKeys
go t.readLoop() go t.readLoop()
go t.kexLoop()
return t return t
} }
@ -109,6 +148,20 @@ func (t *handshakeTransport) getSessionID() []byte {
return t.sessionID return t.sessionID
} }
// waitSession waits for the session to be established. This should be
// the first thing to call after instantiating handshakeTransport.
func (t *handshakeTransport) waitSession() error {
p, err := t.readPacket()
if err != nil {
return err
}
if p[0] != msgNewKeys {
return fmt.Errorf("ssh: first packet should be msgNewKeys")
}
return nil
}
func (t *handshakeTransport) id() string { func (t *handshakeTransport) id() string {
if len(t.hostKeys) > 0 { if len(t.hostKeys) > 0 {
return "server" return "server"
@ -116,6 +169,20 @@ func (t *handshakeTransport) id() string {
return "client" return "client"
} }
func (t *handshakeTransport) printPacket(p []byte, write bool) {
action := "got"
if write {
action = "sent"
}
if p[0] == msgChannelData || p[0] == msgChannelExtendedData {
log.Printf("%s %s data (packet %d bytes)", t.id(), action, len(p))
} else {
msg, err := decode(p)
log.Printf("%s %s %T %v (%v)", t.id(), action, msg, msg, err)
}
}
func (t *handshakeTransport) readPacket() ([]byte, error) { func (t *handshakeTransport) readPacket() ([]byte, error) {
p, ok := <-t.incoming p, ok := <-t.incoming
if !ok { if !ok {
@ -125,8 +192,10 @@ func (t *handshakeTransport) readPacket() ([]byte, error) {
} }
func (t *handshakeTransport) readLoop() { func (t *handshakeTransport) readLoop() {
first := true
for { for {
p, err := t.readOnePacket() p, err := t.readOnePacket(first)
first = false
if err != nil { if err != nil {
t.readError = err t.readError = err
close(t.incoming) close(t.incoming)
@ -138,67 +207,217 @@ func (t *handshakeTransport) readLoop() {
t.incoming <- p t.incoming <- p
} }
// If we can't read, declare the writing part dead too. // Stop writers too.
t.mu.Lock() t.recordWriteError(t.readError)
defer t.mu.Unlock()
if t.writeError == nil { // Unblock the writer should it wait for this.
t.writeError = t.readError close(t.startKex)
}
t.cond.Broadcast() // Don't close t.requestKex; it's also written to from writePacket.
} }
func (t *handshakeTransport) readOnePacket() ([]byte, error) { func (t *handshakeTransport) pushPacket(p []byte) error {
if t.readSinceKex > t.config.RekeyThreshold { if debugHandshake {
if err := t.requestKeyChange(); err != nil { t.printPacket(p, true)
return nil, err }
return t.conn.writePacket(p)
}
func (t *handshakeTransport) getWriteError() error {
t.mu.Lock()
defer t.mu.Unlock()
return t.writeError
}
func (t *handshakeTransport) recordWriteError(err error) {
t.mu.Lock()
defer t.mu.Unlock()
if t.writeError == nil && err != nil {
t.writeError = err
}
}
func (t *handshakeTransport) requestKeyExchange() {
select {
case t.requestKex <- struct{}{}:
default:
// something already requested a kex, so do nothing.
}
}
func (t *handshakeTransport) resetWriteThresholds() {
t.writePacketsLeft = packetRekeyThreshold
if t.config.RekeyThreshold > 0 {
t.writeBytesLeft = int64(t.config.RekeyThreshold)
} else if t.algorithms != nil {
t.writeBytesLeft = t.algorithms.w.rekeyBytes()
} else {
t.writeBytesLeft = 1 << 30
}
}
func (t *handshakeTransport) kexLoop() {
write:
for t.getWriteError() == nil {
var request *pendingKex
var sent bool
for request == nil || !sent {
var ok bool
select {
case request, ok = <-t.startKex:
if !ok {
break write
}
case <-t.requestKex:
break
}
if !sent {
if err := t.sendKexInit(); err != nil {
t.recordWriteError(err)
break
}
sent = true
}
} }
if err := t.getWriteError(); err != nil {
if request != nil {
request.done <- err
}
break
}
// We're not servicing t.requestKex, but that is OK:
// we never block on sending to t.requestKex.
// We're not servicing t.startKex, but the remote end
// has just sent us a kexInitMsg, so it can't send
// another key change request, until we close the done
// channel on the pendingKex request.
err := t.enterKeyExchange(request.otherInit)
t.mu.Lock()
t.writeError = err
t.sentInitPacket = nil
t.sentInitMsg = nil
t.resetWriteThresholds()
// we have completed the key exchange. Since the
// reader is still blocked, it is safe to clear out
// the requestKex channel. This avoids the situation
// where: 1) we consumed our own request for the
// initial kex, and 2) the kex from the remote side
// caused another send on the requestKex channel,
clear:
for {
select {
case <-t.requestKex:
//
default:
break clear
}
}
request.done <- t.writeError
// kex finished. Push packets that we received while
// the kex was in progress. Don't look at t.startKex
// and don't increment writtenSinceKex: if we trigger
// another kex while we are still busy with the last
// one, things will become very confusing.
for _, p := range t.pendingPackets {
t.writeError = t.pushPacket(p)
if t.writeError != nil {
break
}
}
t.pendingPackets = t.pendingPackets[:0]
t.mu.Unlock()
} }
// drain startKex channel. We don't service t.requestKex
// because nobody does blocking sends there.
go func() {
for init := range t.startKex {
init.done <- t.writeError
}
}()
// Unblock reader.
t.conn.Close()
}
// The protocol uses uint32 for packet counters, so we can't let them
// reach 1<<32. We will actually read and write more packets than
// this, though: the other side may send more packets, and after we
// hit this limit on writing we will send a few more packets for the
// key exchange itself.
const packetRekeyThreshold = (1 << 31)
func (t *handshakeTransport) resetReadThresholds() {
t.readPacketsLeft = packetRekeyThreshold
if t.config.RekeyThreshold > 0 {
t.readBytesLeft = int64(t.config.RekeyThreshold)
} else if t.algorithms != nil {
t.readBytesLeft = t.algorithms.r.rekeyBytes()
} else {
t.readBytesLeft = 1 << 30
}
}
func (t *handshakeTransport) readOnePacket(first bool) ([]byte, error) {
p, err := t.conn.readPacket() p, err := t.conn.readPacket()
if err != nil { if err != nil {
return nil, err return nil, err
} }
t.readSinceKex += uint64(len(p)) if t.readPacketsLeft > 0 {
if debugHandshake { t.readPacketsLeft--
if p[0] == msgChannelData || p[0] == msgChannelExtendedData { } else {
log.Printf("%s got data (packet %d bytes)", t.id(), len(p)) t.requestKeyExchange()
} else {
msg, err := decode(p)
log.Printf("%s got %T %v (%v)", t.id(), msg, msg, err)
}
} }
if t.readBytesLeft > 0 {
t.readBytesLeft -= int64(len(p))
} else {
t.requestKeyExchange()
}
if debugHandshake {
t.printPacket(p, false)
}
if first && p[0] != msgKexInit {
return nil, fmt.Errorf("ssh: first packet should be msgKexInit")
}
if p[0] != msgKexInit { if p[0] != msgKexInit {
return p, nil return p, nil
} }
t.mu.Lock()
firstKex := t.sessionID == nil firstKex := t.sessionID == nil
err = t.enterKeyExchangeLocked(p) kex := pendingKex{
if err != nil { done: make(chan error, 1),
// drop connection otherInit: p,
t.conn.Close()
t.writeError = err
} }
t.startKex <- &kex
err = <-kex.done
if debugHandshake { if debugHandshake {
log.Printf("%s exited key exchange (first %v), err %v", t.id(), firstKex, err) log.Printf("%s exited key exchange (first %v), err %v", t.id(), firstKex, err)
} }
// Unblock writers.
t.sentInitMsg = nil
t.sentInitPacket = nil
t.cond.Broadcast()
t.writtenSinceKex = 0
t.mu.Unlock()
if err != nil { if err != nil {
return nil, err return nil, err
} }
t.readSinceKex = 0 t.resetReadThresholds()
// By default, a key exchange is hidden from higher layers by // By default, a key exchange is hidden from higher layers by
// translating it into msgIgnore. // translating it into msgIgnore.
@ -213,61 +432,16 @@ func (t *handshakeTransport) readOnePacket() ([]byte, error) {
return successPacket, nil return successPacket, nil
} }
// keyChangeCategory describes whether a key exchange is the first on a // sendKexInit sends a key change message.
// connection, or a subsequent one. func (t *handshakeTransport) sendKexInit() error {
type keyChangeCategory bool
const (
firstKeyExchange keyChangeCategory = true
subsequentKeyExchange keyChangeCategory = false
)
// sendKexInit sends a key change message, and returns the message
// that was sent. After initiating the key change, all writes will be
// blocked until the change is done, and a failed key change will
// close the underlying transport. This function is safe for
// concurrent use by multiple goroutines.
func (t *handshakeTransport) sendKexInit(isFirst keyChangeCategory) error {
var err error
t.mu.Lock() t.mu.Lock()
// If this is the initial key change, but we already have a sessionID, defer t.mu.Unlock()
// then do nothing because the key exchange has already completed
// asynchronously.
if !isFirst || t.sessionID == nil {
_, _, err = t.sendKexInitLocked(isFirst)
}
t.mu.Unlock()
if err != nil {
return err
}
if isFirst {
if packet, err := t.readPacket(); err != nil {
return err
} else if packet[0] != msgNewKeys {
return unexpectedMessageError(msgNewKeys, packet[0])
}
}
return nil
}
func (t *handshakeTransport) requestInitialKeyChange() error {
return t.sendKexInit(firstKeyExchange)
}
func (t *handshakeTransport) requestKeyChange() error {
return t.sendKexInit(subsequentKeyExchange)
}
// sendKexInitLocked sends a key change message. t.mu must be locked
// while this happens.
func (t *handshakeTransport) sendKexInitLocked(isFirst keyChangeCategory) (*kexInitMsg, []byte, error) {
// kexInits may be sent either in response to the other side,
// or because our side wants to initiate a key change, so we
// may have already sent a kexInit. In that case, don't send a
// second kexInit.
if t.sentInitMsg != nil { if t.sentInitMsg != nil {
return t.sentInitMsg, t.sentInitPacket, nil // kexInits may be sent either in response to the other side,
// or because our side wants to initiate a key change, so we
// may have already sent a kexInit. In that case, don't send a
// second kexInit.
return nil
} }
msg := &kexInitMsg{ msg := &kexInitMsg{
@ -295,53 +469,65 @@ func (t *handshakeTransport) sendKexInitLocked(isFirst keyChangeCategory) (*kexI
packetCopy := make([]byte, len(packet)) packetCopy := make([]byte, len(packet))
copy(packetCopy, packet) copy(packetCopy, packet)
if err := t.conn.writePacket(packetCopy); err != nil { if err := t.pushPacket(packetCopy); err != nil {
return nil, nil, err return err
} }
t.sentInitMsg = msg t.sentInitMsg = msg
t.sentInitPacket = packet t.sentInitPacket = packet
return msg, packet, nil
return nil
} }
func (t *handshakeTransport) writePacket(p []byte) error { func (t *handshakeTransport) writePacket(p []byte) error {
t.mu.Lock()
defer t.mu.Unlock()
if t.writtenSinceKex > t.config.RekeyThreshold {
t.sendKexInitLocked(subsequentKeyExchange)
}
for t.sentInitMsg != nil && t.writeError == nil {
t.cond.Wait()
}
if t.writeError != nil {
return t.writeError
}
t.writtenSinceKex += uint64(len(p))
switch p[0] { switch p[0] {
case msgKexInit: case msgKexInit:
return errors.New("ssh: only handshakeTransport can send kexInit") return errors.New("ssh: only handshakeTransport can send kexInit")
case msgNewKeys: case msgNewKeys:
return errors.New("ssh: only handshakeTransport can send newKeys") return errors.New("ssh: only handshakeTransport can send newKeys")
default:
return t.conn.writePacket(p)
} }
t.mu.Lock()
defer t.mu.Unlock()
if t.writeError != nil {
return t.writeError
}
if t.sentInitMsg != nil {
// Copy the packet so the writer can reuse the buffer.
cp := make([]byte, len(p))
copy(cp, p)
t.pendingPackets = append(t.pendingPackets, cp)
return nil
}
if t.writeBytesLeft > 0 {
t.writeBytesLeft -= int64(len(p))
} else {
t.requestKeyExchange()
}
if t.writePacketsLeft > 0 {
t.writePacketsLeft--
} else {
t.requestKeyExchange()
}
if err := t.pushPacket(p); err != nil {
t.writeError = err
}
return nil
} }
func (t *handshakeTransport) Close() error { func (t *handshakeTransport) Close() error {
return t.conn.Close() return t.conn.Close()
} }
// enterKeyExchange runs the key exchange. t.mu must be held while running this. func (t *handshakeTransport) enterKeyExchange(otherInitPacket []byte) error {
func (t *handshakeTransport) enterKeyExchangeLocked(otherInitPacket []byte) error {
if debugHandshake { if debugHandshake {
log.Printf("%s entered key exchange", t.id()) log.Printf("%s entered key exchange", t.id())
} }
myInit, myInitPacket, err := t.sendKexInitLocked(subsequentKeyExchange)
if err != nil {
return err
}
otherInit := &kexInitMsg{} otherInit := &kexInitMsg{}
if err := Unmarshal(otherInitPacket, otherInit); err != nil { if err := Unmarshal(otherInitPacket, otherInit); err != nil {
@ -352,20 +538,20 @@ func (t *handshakeTransport) enterKeyExchangeLocked(otherInitPacket []byte) erro
clientVersion: t.clientVersion, clientVersion: t.clientVersion,
serverVersion: t.serverVersion, serverVersion: t.serverVersion,
clientKexInit: otherInitPacket, clientKexInit: otherInitPacket,
serverKexInit: myInitPacket, serverKexInit: t.sentInitPacket,
} }
clientInit := otherInit clientInit := otherInit
serverInit := myInit serverInit := t.sentInitMsg
if len(t.hostKeys) == 0 { if len(t.hostKeys) == 0 {
clientInit = myInit clientInit, serverInit = serverInit, clientInit
serverInit = otherInit
magics.clientKexInit = myInitPacket magics.clientKexInit = t.sentInitPacket
magics.serverKexInit = otherInitPacket magics.serverKexInit = otherInitPacket
} }
algs, err := findAgreedAlgorithms(clientInit, serverInit) var err error
t.algorithms, err = findAgreedAlgorithms(clientInit, serverInit)
if err != nil { if err != nil {
return err return err
} }
@ -388,16 +574,16 @@ func (t *handshakeTransport) enterKeyExchangeLocked(otherInitPacket []byte) erro
} }
} }
kex, ok := kexAlgoMap[algs.kex] kex, ok := kexAlgoMap[t.algorithms.kex]
if !ok { if !ok {
return fmt.Errorf("ssh: unexpected key exchange algorithm %v", algs.kex) return fmt.Errorf("ssh: unexpected key exchange algorithm %v", t.algorithms.kex)
} }
var result *kexResult var result *kexResult
if len(t.hostKeys) > 0 { if len(t.hostKeys) > 0 {
result, err = t.server(kex, algs, &magics) result, err = t.server(kex, t.algorithms, &magics)
} else { } else {
result, err = t.client(kex, algs, &magics) result, err = t.client(kex, t.algorithms, &magics)
} }
if err != nil { if err != nil {
@ -409,7 +595,9 @@ func (t *handshakeTransport) enterKeyExchangeLocked(otherInitPacket []byte) erro
} }
result.SessionID = t.sessionID result.SessionID = t.sessionID
t.conn.prepareKeyChange(algs, result) if err := t.conn.prepareKeyChange(t.algorithms, result); err != nil {
return err
}
if err = t.conn.writePacket([]byte{msgNewKeys}); err != nil { if err = t.conn.writePacket([]byte{msgNewKeys}); err != nil {
return err return err
} }
@ -449,11 +637,9 @@ func (t *handshakeTransport) client(kex kexAlgorithm, algs *algorithms, magics *
return nil, err return nil, err
} }
if t.hostKeyCallback != nil { err = t.hostKeyCallback(t.dialAddress, t.remoteAddr, hostKey)
err = t.hostKeyCallback(t.dialAddress, t.remoteAddr, hostKey) if err != nil {
if err != nil { return nil, err
return nil, err
}
} }
return result, nil return result, nil

8
vendor/golang.org/x/crypto/ssh/kex.go generated vendored
View file

@ -383,8 +383,8 @@ func init() {
// 4253 and Oakley Group 2 in RFC 2409. // 4253 and Oakley Group 2 in RFC 2409.
p, _ := new(big.Int).SetString("FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF", 16) p, _ := new(big.Int).SetString("FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF", 16)
kexAlgoMap[kexAlgoDH1SHA1] = &dhGroup{ kexAlgoMap[kexAlgoDH1SHA1] = &dhGroup{
g: new(big.Int).SetInt64(2), g: new(big.Int).SetInt64(2),
p: p, p: p,
pMinus1: new(big.Int).Sub(p, bigOne), pMinus1: new(big.Int).Sub(p, bigOne),
} }
@ -393,8 +393,8 @@ func init() {
p, _ = new(big.Int).SetString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p, _ = new(big.Int).SetString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
kexAlgoMap[kexAlgoDH14SHA1] = &dhGroup{ kexAlgoMap[kexAlgoDH14SHA1] = &dhGroup{
g: new(big.Int).SetInt64(2), g: new(big.Int).SetInt64(2),
p: p, p: p,
pMinus1: new(big.Int).Sub(p, bigOne), pMinus1: new(big.Int).Sub(p, bigOne),
} }

217
vendor/golang.org/x/crypto/ssh/keys.go generated vendored
View file

@ -10,10 +10,13 @@ import (
"crypto/dsa" "crypto/dsa"
"crypto/ecdsa" "crypto/ecdsa"
"crypto/elliptic" "crypto/elliptic"
"crypto/md5"
"crypto/rsa" "crypto/rsa"
"crypto/sha256"
"crypto/x509" "crypto/x509"
"encoding/asn1" "encoding/asn1"
"encoding/base64" "encoding/base64"
"encoding/hex"
"encoding/pem" "encoding/pem"
"errors" "errors"
"fmt" "fmt"
@ -364,6 +367,17 @@ func (r *dsaPublicKey) Type() string {
return "ssh-dss" return "ssh-dss"
} }
func checkDSAParams(param *dsa.Parameters) error {
// SSH specifies FIPS 186-2, which only provided a single size
// (1024 bits) DSA key. FIPS 186-3 allows for larger key
// sizes, which would confuse SSH.
if l := param.P.BitLen(); l != 1024 {
return fmt.Errorf("ssh: unsupported DSA key size %d", l)
}
return nil
}
// parseDSA parses an DSA key according to RFC 4253, section 6.6. // parseDSA parses an DSA key according to RFC 4253, section 6.6.
func parseDSA(in []byte) (out PublicKey, rest []byte, err error) { func parseDSA(in []byte) (out PublicKey, rest []byte, err error) {
var w struct { var w struct {
@ -374,13 +388,18 @@ func parseDSA(in []byte) (out PublicKey, rest []byte, err error) {
return nil, nil, err return nil, nil, err
} }
param := dsa.Parameters{
P: w.P,
Q: w.Q,
G: w.G,
}
if err := checkDSAParams(&param); err != nil {
return nil, nil, err
}
key := &dsaPublicKey{ key := &dsaPublicKey{
Parameters: dsa.Parameters{ Parameters: param,
P: w.P, Y: w.Y,
Q: w.Q,
G: w.G,
},
Y: w.Y,
} }
return key, w.Rest, nil return key, w.Rest, nil
} }
@ -627,19 +646,28 @@ func (k *ecdsaPublicKey) CryptoPublicKey() crypto.PublicKey {
} }
// NewSignerFromKey takes an *rsa.PrivateKey, *dsa.PrivateKey, // NewSignerFromKey takes an *rsa.PrivateKey, *dsa.PrivateKey,
// *ecdsa.PrivateKey or any other crypto.Signer and returns a corresponding // *ecdsa.PrivateKey or any other crypto.Signer and returns a
// Signer instance. ECDSA keys must use P-256, P-384 or P-521. // corresponding Signer instance. ECDSA keys must use P-256, P-384 or
// P-521. DSA keys must use parameter size L1024N160.
func NewSignerFromKey(key interface{}) (Signer, error) { func NewSignerFromKey(key interface{}) (Signer, error) {
switch key := key.(type) { switch key := key.(type) {
case crypto.Signer: case crypto.Signer:
return NewSignerFromSigner(key) return NewSignerFromSigner(key)
case *dsa.PrivateKey: case *dsa.PrivateKey:
return &dsaPrivateKey{key}, nil return newDSAPrivateKey(key)
default: default:
return nil, fmt.Errorf("ssh: unsupported key type %T", key) return nil, fmt.Errorf("ssh: unsupported key type %T", key)
} }
} }
func newDSAPrivateKey(key *dsa.PrivateKey) (Signer, error) {
if err := checkDSAParams(&key.PublicKey.Parameters); err != nil {
return nil, err
}
return &dsaPrivateKey{key}, nil
}
type wrappedSigner struct { type wrappedSigner struct {
signer crypto.Signer signer crypto.Signer
pubKey PublicKey pubKey PublicKey
@ -753,6 +781,18 @@ func ParsePrivateKey(pemBytes []byte) (Signer, error) {
return NewSignerFromKey(key) return NewSignerFromKey(key)
} }
// ParsePrivateKeyWithPassphrase returns a Signer from a PEM encoded private
// key and passphrase. It supports the same keys as
// ParseRawPrivateKeyWithPassphrase.
func ParsePrivateKeyWithPassphrase(pemBytes, passPhrase []byte) (Signer, error) {
key, err := ParseRawPrivateKeyWithPassphrase(pemBytes, passPhrase)
if err != nil {
return nil, err
}
return NewSignerFromKey(key)
}
// encryptedBlock tells whether a private key is // encryptedBlock tells whether a private key is
// encrypted by examining its Proc-Type header // encrypted by examining its Proc-Type header
// for a mention of ENCRYPTED // for a mention of ENCRYPTED
@ -787,6 +827,43 @@ func ParseRawPrivateKey(pemBytes []byte) (interface{}, error) {
} }
} }
// ParseRawPrivateKeyWithPassphrase returns a private key decrypted with
// passphrase from a PEM encoded private key. If wrong passphrase, return
// x509.IncorrectPasswordError.
func ParseRawPrivateKeyWithPassphrase(pemBytes, passPhrase []byte) (interface{}, error) {
block, _ := pem.Decode(pemBytes)
if block == nil {
return nil, errors.New("ssh: no key found")
}
buf := block.Bytes
if encryptedBlock(block) {
if x509.IsEncryptedPEMBlock(block) {
var err error
buf, err = x509.DecryptPEMBlock(block, passPhrase)
if err != nil {
if err == x509.IncorrectPasswordError {
return nil, err
}
return nil, fmt.Errorf("ssh: cannot decode encrypted private keys: %v", err)
}
}
}
switch block.Type {
case "RSA PRIVATE KEY":
return x509.ParsePKCS1PrivateKey(buf)
case "EC PRIVATE KEY":
return x509.ParseECPrivateKey(buf)
case "DSA PRIVATE KEY":
return ParseDSAPrivateKey(buf)
case "OPENSSH PRIVATE KEY":
return parseOpenSSHPrivateKey(buf)
default:
return nil, fmt.Errorf("ssh: unsupported key type %q", block.Type)
}
}
// ParseDSAPrivateKey returns a DSA private key from its ASN.1 DER encoding, as // ParseDSAPrivateKey returns a DSA private key from its ASN.1 DER encoding, as
// specified by the OpenSSL DSA man page. // specified by the OpenSSL DSA man page.
func ParseDSAPrivateKey(der []byte) (*dsa.PrivateKey, error) { func ParseDSAPrivateKey(der []byte) (*dsa.PrivateKey, error) {
@ -795,8 +872,8 @@ func ParseDSAPrivateKey(der []byte) (*dsa.PrivateKey, error) {
P *big.Int P *big.Int
Q *big.Int Q *big.Int
G *big.Int G *big.Int
Priv *big.Int
Pub *big.Int Pub *big.Int
Priv *big.Int
} }
rest, err := asn1.Unmarshal(der, &k) rest, err := asn1.Unmarshal(der, &k)
if err != nil { if err != nil {
@ -813,15 +890,15 @@ func ParseDSAPrivateKey(der []byte) (*dsa.PrivateKey, error) {
Q: k.Q, Q: k.Q,
G: k.G, G: k.G,
}, },
Y: k.Priv, Y: k.Pub,
}, },
X: k.Pub, X: k.Priv,
}, nil }, nil
} }
// Implemented based on the documentation at // Implemented based on the documentation at
// https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.key // https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.key
func parseOpenSSHPrivateKey(key []byte) (*ed25519.PrivateKey, error) { func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) {
magic := append([]byte("openssh-key-v1"), 0) magic := append([]byte("openssh-key-v1"), 0)
if !bytes.Equal(magic, key[0:len(magic)]) { if !bytes.Equal(magic, key[0:len(magic)]) {
return nil, errors.New("ssh: invalid openssh private key format") return nil, errors.New("ssh: invalid openssh private key format")
@ -841,14 +918,15 @@ func parseOpenSSHPrivateKey(key []byte) (*ed25519.PrivateKey, error) {
return nil, err return nil, err
} }
if w.KdfName != "none" || w.CipherName != "none" {
return nil, errors.New("ssh: cannot decode encrypted private keys")
}
pk1 := struct { pk1 := struct {
Check1 uint32 Check1 uint32
Check2 uint32 Check2 uint32
Keytype string Keytype string
Pub []byte Rest []byte `ssh:"rest"`
Priv []byte
Comment string
Pad []byte `ssh:"rest"`
}{} }{}
if err := Unmarshal(w.PrivKeyBlock, &pk1); err != nil { if err := Unmarshal(w.PrivKeyBlock, &pk1); err != nil {
@ -859,22 +937,95 @@ func parseOpenSSHPrivateKey(key []byte) (*ed25519.PrivateKey, error) {
return nil, errors.New("ssh: checkint mismatch") return nil, errors.New("ssh: checkint mismatch")
} }
// we only handle ed25519 keys currently // we only handle ed25519 and rsa keys currently
if pk1.Keytype != KeyAlgoED25519 { switch pk1.Keytype {
case KeyAlgoRSA:
// https://github.com/openssh/openssh-portable/blob/master/sshkey.c#L2760-L2773
key := struct {
N *big.Int
E *big.Int
D *big.Int
Iqmp *big.Int
P *big.Int
Q *big.Int
Comment string
Pad []byte `ssh:"rest"`
}{}
if err := Unmarshal(pk1.Rest, &key); err != nil {
return nil, err
}
for i, b := range key.Pad {
if int(b) != i+1 {
return nil, errors.New("ssh: padding not as expected")
}
}
pk := &rsa.PrivateKey{
PublicKey: rsa.PublicKey{
N: key.N,
E: int(key.E.Int64()),
},
D: key.D,
Primes: []*big.Int{key.P, key.Q},
}
if err := pk.Validate(); err != nil {
return nil, err
}
pk.Precompute()
return pk, nil
case KeyAlgoED25519:
key := struct {
Pub []byte
Priv []byte
Comment string
Pad []byte `ssh:"rest"`
}{}
if err := Unmarshal(pk1.Rest, &key); err != nil {
return nil, err
}
if len(key.Priv) != ed25519.PrivateKeySize {
return nil, errors.New("ssh: private key unexpected length")
}
for i, b := range key.Pad {
if int(b) != i+1 {
return nil, errors.New("ssh: padding not as expected")
}
}
pk := ed25519.PrivateKey(make([]byte, ed25519.PrivateKeySize))
copy(pk, key.Priv)
return &pk, nil
default:
return nil, errors.New("ssh: unhandled key type") return nil, errors.New("ssh: unhandled key type")
} }
}
for i, b := range pk1.Pad {
if int(b) != i+1 { // FingerprintLegacyMD5 returns the user presentation of the key's
return nil, errors.New("ssh: padding not as expected") // fingerprint as described by RFC 4716 section 4.
} func FingerprintLegacyMD5(pubKey PublicKey) string {
} md5sum := md5.Sum(pubKey.Marshal())
hexarray := make([]string, len(md5sum))
if len(pk1.Priv) != ed25519.PrivateKeySize { for i, c := range md5sum {
return nil, errors.New("ssh: private key unexpected length") hexarray[i] = hex.EncodeToString([]byte{c})
} }
return strings.Join(hexarray, ":")
pk := ed25519.PrivateKey(make([]byte, ed25519.PrivateKeySize)) }
copy(pk, pk1.Priv)
return &pk, nil // FingerprintSHA256 returns the user presentation of the key's
// fingerprint as unpadded base64 encoded sha256 hash.
// This format was introduced from OpenSSH 6.8.
// https://www.openssh.com/txt/release-6.8
// https://tools.ietf.org/html/rfc4648#section-3.2 (unpadded base64 encoding)
func FingerprintSHA256(pubKey PublicKey) string {
sha256sum := sha256.Sum256(pubKey.Marshal())
hash := base64.RawStdEncoding.EncodeToString(sha256sum[:])
return "SHA256:" + hash
} }

10
vendor/golang.org/x/crypto/ssh/mac.go generated vendored
View file

@ -15,6 +15,7 @@ import (
type macMode struct { type macMode struct {
keySize int keySize int
etm bool
new func(key []byte) hash.Hash new func(key []byte) hash.Hash
} }
@ -45,13 +46,16 @@ func (t truncatingMAC) Size() int {
func (t truncatingMAC) BlockSize() int { return t.hmac.BlockSize() } func (t truncatingMAC) BlockSize() int { return t.hmac.BlockSize() }
var macModes = map[string]*macMode{ var macModes = map[string]*macMode{
"hmac-sha2-256": {32, func(key []byte) hash.Hash { "hmac-sha2-256-etm@openssh.com": {32, true, func(key []byte) hash.Hash {
return hmac.New(sha256.New, key) return hmac.New(sha256.New, key)
}}, }},
"hmac-sha1": {20, func(key []byte) hash.Hash { "hmac-sha2-256": {32, false, func(key []byte) hash.Hash {
return hmac.New(sha256.New, key)
}},
"hmac-sha1": {20, false, func(key []byte) hash.Hash {
return hmac.New(sha1.New, key) return hmac.New(sha1.New, key)
}}, }},
"hmac-sha1-96": {20, func(key []byte) hash.Hash { "hmac-sha1-96": {20, false, func(key []byte) hash.Hash {
return truncatingMAC{12, hmac.New(sha1.New, key)} return truncatingMAC{12, hmac.New(sha1.New, key)}
}}, }},
} }

16
vendor/golang.org/x/crypto/ssh/messages.go generated vendored
View file

@ -23,10 +23,6 @@ const (
msgUnimplemented = 3 msgUnimplemented = 3
msgDebug = 4 msgDebug = 4
msgNewKeys = 21 msgNewKeys = 21
// Standard authentication messages
msgUserAuthSuccess = 52
msgUserAuthBanner = 53
) )
// SSH messages: // SSH messages:
@ -137,6 +133,18 @@ type userAuthFailureMsg struct {
PartialSuccess bool PartialSuccess bool
} }
// See RFC 4252, section 5.1
const msgUserAuthSuccess = 52
// See RFC 4252, section 5.4
const msgUserAuthBanner = 53
type userAuthBannerMsg struct {
Message string `sshtype:"53"`
// unused, but required to allow message parsing
Language string
}
// See RFC 4256, section 3.2 // See RFC 4256, section 3.2
const msgUserAuthInfoRequest = 60 const msgUserAuthInfoRequest = 60
const msgUserAuthInfoResponse = 61 const msgUserAuthInfoResponse = 61

4
vendor/golang.org/x/crypto/ssh/mux.go generated vendored
View file

@ -116,9 +116,9 @@ func (m *mux) Wait() error {
func newMux(p packetConn) *mux { func newMux(p packetConn) *mux {
m := &mux{ m := &mux{
conn: p, conn: p,
incomingChannels: make(chan NewChannel, 16), incomingChannels: make(chan NewChannel, chanSize),
globalResponses: make(chan interface{}, 1), globalResponses: make(chan interface{}, 1),
incomingRequests: make(chan *Request, 16), incomingRequests: make(chan *Request, chanSize),
errCond: newCond(), errCond: newCond(),
} }
if debugMux { if debugMux {

158
vendor/golang.org/x/crypto/ssh/server.go generated vendored
View file

@ -10,26 +10,38 @@ import (
"fmt" "fmt"
"io" "io"
"net" "net"
"strings"
) )
// The Permissions type holds fine-grained permissions that are // The Permissions type holds fine-grained permissions that are
// specific to a user or a specific authentication method for a // specific to a user or a specific authentication method for a user.
// user. Permissions, except for "source-address", must be enforced in // The Permissions value for a successful authentication attempt is
// the server application layer, after successful authentication. The // available in ServerConn, so it can be used to pass information from
// Permissions are passed on in ServerConn so a server implementation // the user-authentication phase to the application layer.
// can honor them.
type Permissions struct { type Permissions struct {
// Critical options restrict default permissions. Common // CriticalOptions indicate restrictions to the default
// restrictions are "source-address" and "force-command". If // permissions, and are typically used in conjunction with
// the server cannot enforce the restriction, or does not // user certificates. The standard for SSH certificates
// recognize it, the user should not authenticate. // defines "force-command" (only allow the given command to
// execute) and "source-address" (only allow connections from
// the given address). The SSH package currently only enforces
// the "source-address" critical option. It is up to server
// implementations to enforce other critical options, such as
// "force-command", by checking them after the SSH handshake
// is successful. In general, SSH servers should reject
// connections that specify critical options that are unknown
// or not supported.
CriticalOptions map[string]string CriticalOptions map[string]string
// Extensions are extra functionality that the server may // Extensions are extra functionality that the server may
// offer on authenticated connections. Common extensions are // offer on authenticated connections. Lack of support for an
// "permit-agent-forwarding", "permit-X11-forwarding". Lack of // extension does not preclude authenticating a user. Common
// support for an extension does not preclude authenticating a // extensions are "permit-agent-forwarding",
// user. // "permit-X11-forwarding". The Go SSH library currently does
// not act on any extension, and it is up to server
// implementations to honor them. Extensions can be used to
// pass data from the authentication callbacks to the server
// application layer.
Extensions map[string]string Extensions map[string]string
} }
@ -44,13 +56,24 @@ type ServerConfig struct {
// authenticating. // authenticating.
NoClientAuth bool NoClientAuth bool
// MaxAuthTries specifies the maximum number of authentication attempts
// permitted per connection. If set to a negative number, the number of
// attempts are unlimited. If set to zero, the number of attempts are limited
// to 6.
MaxAuthTries int
// PasswordCallback, if non-nil, is called when a user // PasswordCallback, if non-nil, is called when a user
// attempts to authenticate using a password. // attempts to authenticate using a password.
PasswordCallback func(conn ConnMetadata, password []byte) (*Permissions, error) PasswordCallback func(conn ConnMetadata, password []byte) (*Permissions, error)
// PublicKeyCallback, if non-nil, is called when a client attempts public // PublicKeyCallback, if non-nil, is called when a client
// key authentication. It must return true if the given public key is // offers a public key for authentication. It must return a nil error
// valid for the given user. For example, see CertChecker.Authenticate. // if the given public key can be used to authenticate the
// given user. For example, see CertChecker.Authenticate. A
// call to this function does not guarantee that the key
// offered is in fact used to authenticate. To record any data
// depending on the public key, store it inside a
// Permissions.Extensions entry.
PublicKeyCallback func(conn ConnMetadata, key PublicKey) (*Permissions, error) PublicKeyCallback func(conn ConnMetadata, key PublicKey) (*Permissions, error)
// KeyboardInteractiveCallback, if non-nil, is called when // KeyboardInteractiveCallback, if non-nil, is called when
@ -72,6 +95,10 @@ type ServerConfig struct {
// Note that RFC 4253 section 4.2 requires that this string start with // Note that RFC 4253 section 4.2 requires that this string start with
// "SSH-2.0-". // "SSH-2.0-".
ServerVersion string ServerVersion string
// BannerCallback, if present, is called and the return string is sent to
// the client after key exchange completed but before authentication.
BannerCallback func(conn ConnMetadata) string
} }
// AddHostKey adds a private key as a host key. If an existing host // AddHostKey adds a private key as a host key. If an existing host
@ -142,6 +169,10 @@ type ServerConn struct {
func NewServerConn(c net.Conn, config *ServerConfig) (*ServerConn, <-chan NewChannel, <-chan *Request, error) { func NewServerConn(c net.Conn, config *ServerConfig) (*ServerConn, <-chan NewChannel, <-chan *Request, error) {
fullConf := *config fullConf := *config
fullConf.SetDefaults() fullConf.SetDefaults()
if fullConf.MaxAuthTries == 0 {
fullConf.MaxAuthTries = 6
}
s := &connection{ s := &connection{
sshConn: sshConn{conn: c}, sshConn: sshConn{conn: c},
} }
@ -188,7 +219,7 @@ func (s *connection) serverHandshake(config *ServerConfig) (*Permissions, error)
tr := newTransport(s.sshConn.conn, config.Rand, false /* not client */) tr := newTransport(s.sshConn.conn, config.Rand, false /* not client */)
s.transport = newServerTransport(tr, s.clientVersion, s.serverVersion, config) s.transport = newServerTransport(tr, s.clientVersion, s.serverVersion, config)
if err := s.transport.requestInitialKeyChange(); err != nil { if err := s.transport.waitSession(); err != nil {
return nil, err return nil, err
} }
@ -231,7 +262,7 @@ func isAcceptableAlgo(algo string) bool {
return false return false
} }
func checkSourceAddress(addr net.Addr, sourceAddr string) error { func checkSourceAddress(addr net.Addr, sourceAddrs string) error {
if addr == nil { if addr == nil {
return errors.New("ssh: no address known for client, but source-address match required") return errors.New("ssh: no address known for client, but source-address match required")
} }
@ -241,33 +272,71 @@ func checkSourceAddress(addr net.Addr, sourceAddr string) error {
return fmt.Errorf("ssh: remote address %v is not an TCP address when checking source-address match", addr) return fmt.Errorf("ssh: remote address %v is not an TCP address when checking source-address match", addr)
} }
if allowedIP := net.ParseIP(sourceAddr); allowedIP != nil { for _, sourceAddr := range strings.Split(sourceAddrs, ",") {
if bytes.Equal(allowedIP, tcpAddr.IP) { if allowedIP := net.ParseIP(sourceAddr); allowedIP != nil {
return nil if allowedIP.Equal(tcpAddr.IP) {
} return nil
} else { }
_, ipNet, err := net.ParseCIDR(sourceAddr) } else {
if err != nil { _, ipNet, err := net.ParseCIDR(sourceAddr)
return fmt.Errorf("ssh: error parsing source-address restriction %q: %v", sourceAddr, err) if err != nil {
} return fmt.Errorf("ssh: error parsing source-address restriction %q: %v", sourceAddr, err)
}
if ipNet.Contains(tcpAddr.IP) { if ipNet.Contains(tcpAddr.IP) {
return nil return nil
}
} }
} }
return fmt.Errorf("ssh: remote address %v is not allowed because of source-address restriction", addr) return fmt.Errorf("ssh: remote address %v is not allowed because of source-address restriction", addr)
} }
// ServerAuthError implements the error interface. It appends any authentication
// errors that may occur, and is returned if all of the authentication methods
// provided by the user failed to authenticate.
type ServerAuthError struct {
// Errors contains authentication errors returned by the authentication
// callback methods.
Errors []error
}
func (l ServerAuthError) Error() string {
var errs []string
for _, err := range l.Errors {
errs = append(errs, err.Error())
}
return "[" + strings.Join(errs, ", ") + "]"
}
func (s *connection) serverAuthenticate(config *ServerConfig) (*Permissions, error) { func (s *connection) serverAuthenticate(config *ServerConfig) (*Permissions, error) {
var err error sessionID := s.transport.getSessionID()
var cache pubKeyCache var cache pubKeyCache
var perms *Permissions var perms *Permissions
authFailures := 0
var authErrs []error
userAuthLoop: userAuthLoop:
for { for {
if authFailures >= config.MaxAuthTries && config.MaxAuthTries > 0 {
discMsg := &disconnectMsg{
Reason: 2,
Message: "too many authentication failures",
}
if err := s.transport.writePacket(Marshal(discMsg)); err != nil {
return nil, err
}
return nil, discMsg
}
var userAuthReq userAuthRequestMsg var userAuthReq userAuthRequestMsg
if packet, err := s.transport.readPacket(); err != nil { if packet, err := s.transport.readPacket(); err != nil {
if err == io.EOF {
return nil, &ServerAuthError{Errors: authErrs}
}
return nil, err return nil, err
} else if err = Unmarshal(packet, &userAuthReq); err != nil { } else if err = Unmarshal(packet, &userAuthReq); err != nil {
return nil, err return nil, err
@ -278,6 +347,19 @@ userAuthLoop:
} }
s.user = userAuthReq.User s.user = userAuthReq.User
if authFailures == 0 && config.BannerCallback != nil {
msg := config.BannerCallback(s)
if msg != "" {
bannerMsg := &userAuthBannerMsg{
Message: msg,
}
if err := s.transport.writePacket(Marshal(bannerMsg)); err != nil {
return nil, err
}
}
}
perms = nil perms = nil
authErr := errors.New("no auth passed yet") authErr := errors.New("no auth passed yet")
@ -286,6 +368,11 @@ userAuthLoop:
if config.NoClientAuth { if config.NoClientAuth {
authErr = nil authErr = nil
} }
// allow initial attempt of 'none' without penalty
if authFailures == 0 {
authFailures--
}
case "password": case "password":
if config.PasswordCallback == nil { if config.PasswordCallback == nil {
authErr = errors.New("ssh: password auth not configured") authErr = errors.New("ssh: password auth not configured")
@ -357,6 +444,7 @@ userAuthLoop:
if isQuery { if isQuery {
// The client can query if the given public key // The client can query if the given public key
// would be okay. // would be okay.
if len(payload) > 0 { if len(payload) > 0 {
return nil, parseError(msgUserAuthRequest) return nil, parseError(msgUserAuthRequest)
} }
@ -385,7 +473,7 @@ userAuthLoop:
if !isAcceptableAlgo(sig.Format) { if !isAcceptableAlgo(sig.Format) {
break break
} }
signedData := buildDataSignedForAuth(s.transport.getSessionID(), userAuthReq, algoBytes, pubKeyData) signedData := buildDataSignedForAuth(sessionID, userAuthReq, algoBytes, pubKeyData)
if err := pubKey.Verify(signedData, sig); err != nil { if err := pubKey.Verify(signedData, sig); err != nil {
return nil, err return nil, err
@ -398,6 +486,8 @@ userAuthLoop:
authErr = fmt.Errorf("ssh: unknown method %q", userAuthReq.Method) authErr = fmt.Errorf("ssh: unknown method %q", userAuthReq.Method)
} }
authErrs = append(authErrs, authErr)
if config.AuthLogCallback != nil { if config.AuthLogCallback != nil {
config.AuthLogCallback(s, userAuthReq.Method, authErr) config.AuthLogCallback(s, userAuthReq.Method, authErr)
} }
@ -406,6 +496,8 @@ userAuthLoop:
break userAuthLoop break userAuthLoop
} }
authFailures++
var failureMsg userAuthFailureMsg var failureMsg userAuthFailureMsg
if config.PasswordCallback != nil { if config.PasswordCallback != nil {
failureMsg.Methods = append(failureMsg.Methods, "password") failureMsg.Methods = append(failureMsg.Methods, "password")
@ -421,12 +513,12 @@ userAuthLoop:
return nil, errors.New("ssh: no authentication methods configured but NoClientAuth is also false") return nil, errors.New("ssh: no authentication methods configured but NoClientAuth is also false")
} }
if err = s.transport.writePacket(Marshal(&failureMsg)); err != nil { if err := s.transport.writePacket(Marshal(&failureMsg)); err != nil {
return nil, err return nil, err
} }
} }
if err = s.transport.writePacket([]byte{msgUserAuthSuccess}); err != nil { if err := s.transport.writePacket([]byte{msgUserAuthSuccess}); err != nil {
return nil, err return nil, err
} }
return perms, nil return perms, nil

20
vendor/golang.org/x/crypto/ssh/session.go generated vendored
View file

@ -231,6 +231,26 @@ func (s *Session) RequestSubsystem(subsystem string) error {
return err return err
} }
// RFC 4254 Section 6.7.
type ptyWindowChangeMsg struct {
Columns uint32
Rows uint32
Width uint32
Height uint32
}
// WindowChange informs the remote host about a terminal window dimension change to h rows and w columns.
func (s *Session) WindowChange(h, w int) error {
req := ptyWindowChangeMsg{
Columns: uint32(w),
Rows: uint32(h),
Width: uint32(w * 8),
Height: uint32(h * 8),
}
_, err := s.ch.SendRequest("window-change", false, Marshal(&req))
return err
}
// RFC 4254 Section 6.9. // RFC 4254 Section 6.9.
type signalMsg struct { type signalMsg struct {
Signal string Signal string

115
vendor/golang.org/x/crypto/ssh/streamlocal.go generated vendored Normal file
View file

@ -0,0 +1,115 @@
package ssh
import (
"errors"
"io"
"net"
)
// streamLocalChannelOpenDirectMsg is a struct used for SSH_MSG_CHANNEL_OPEN message
// with "direct-streamlocal@openssh.com" string.
//
// See openssh-portable/PROTOCOL, section 2.4. connection: Unix domain socket forwarding
// https://github.com/openssh/openssh-portable/blob/master/PROTOCOL#L235
type streamLocalChannelOpenDirectMsg struct {
socketPath string
reserved0 string
reserved1 uint32
}
// forwardedStreamLocalPayload is a struct used for SSH_MSG_CHANNEL_OPEN message
// with "forwarded-streamlocal@openssh.com" string.
type forwardedStreamLocalPayload struct {
SocketPath string
Reserved0 string
}
// streamLocalChannelForwardMsg is a struct used for SSH2_MSG_GLOBAL_REQUEST message
// with "streamlocal-forward@openssh.com"/"cancel-streamlocal-forward@openssh.com" string.
type streamLocalChannelForwardMsg struct {
socketPath string
}
// ListenUnix is similar to ListenTCP but uses a Unix domain socket.
func (c *Client) ListenUnix(socketPath string) (net.Listener, error) {
m := streamLocalChannelForwardMsg{
socketPath,
}
// send message
ok, _, err := c.SendRequest("streamlocal-forward@openssh.com", true, Marshal(&m))
if err != nil {
return nil, err
}
if !ok {
return nil, errors.New("ssh: streamlocal-forward@openssh.com request denied by peer")
}
ch := c.forwards.add(&net.UnixAddr{Name: socketPath, Net: "unix"})
return &unixListener{socketPath, c, ch}, nil
}
func (c *Client) dialStreamLocal(socketPath string) (Channel, error) {
msg := streamLocalChannelOpenDirectMsg{
socketPath: socketPath,
}
ch, in, err := c.OpenChannel("direct-streamlocal@openssh.com", Marshal(&msg))
if err != nil {
return nil, err
}
go DiscardRequests(in)
return ch, err
}
type unixListener struct {
socketPath string
conn *Client
in <-chan forward
}
// Accept waits for and returns the next connection to the listener.
func (l *unixListener) Accept() (net.Conn, error) {
s, ok := <-l.in
if !ok {
return nil, io.EOF
}
ch, incoming, err := s.newCh.Accept()
if err != nil {
return nil, err
}
go DiscardRequests(incoming)
return &chanConn{
Channel: ch,
laddr: &net.UnixAddr{
Name: l.socketPath,
Net: "unix",
},
raddr: &net.UnixAddr{
Name: "@",
Net: "unix",
},
}, nil
}
// Close closes the listener.
func (l *unixListener) Close() error {
// this also closes the listener.
l.conn.forwards.remove(&net.UnixAddr{Name: l.socketPath, Net: "unix"})
m := streamLocalChannelForwardMsg{
l.socketPath,
}
ok, _, err := l.conn.SendRequest("cancel-streamlocal-forward@openssh.com", true, Marshal(&m))
if err == nil && !ok {
err = errors.New("ssh: cancel-streamlocal-forward@openssh.com failed")
}
return err
}
// Addr returns the listener's network address.
func (l *unixListener) Addr() net.Addr {
return &net.UnixAddr{
Name: l.socketPath,
Net: "unix",
}
}

196
vendor/golang.org/x/crypto/ssh/tcpip.go generated vendored
View file

@ -20,12 +20,20 @@ import (
// addr. Incoming connections will be available by calling Accept on // addr. Incoming connections will be available by calling Accept on
// the returned net.Listener. The listener must be serviced, or the // the returned net.Listener. The listener must be serviced, or the
// SSH connection may hang. // SSH connection may hang.
// N must be "tcp", "tcp4", "tcp6", or "unix".
func (c *Client) Listen(n, addr string) (net.Listener, error) { func (c *Client) Listen(n, addr string) (net.Listener, error) {
laddr, err := net.ResolveTCPAddr(n, addr) switch n {
if err != nil { case "tcp", "tcp4", "tcp6":
return nil, err laddr, err := net.ResolveTCPAddr(n, addr)
if err != nil {
return nil, err
}
return c.ListenTCP(laddr)
case "unix":
return c.ListenUnix(addr)
default:
return nil, fmt.Errorf("ssh: unsupported protocol: %s", n)
} }
return c.ListenTCP(laddr)
} }
// Automatic port allocation is broken with OpenSSH before 6.0. See // Automatic port allocation is broken with OpenSSH before 6.0. See
@ -116,7 +124,7 @@ func (c *Client) ListenTCP(laddr *net.TCPAddr) (net.Listener, error) {
} }
// Register this forward, using the port number we obtained. // Register this forward, using the port number we obtained.
ch := c.forwards.add(*laddr) ch := c.forwards.add(laddr)
return &tcpListener{laddr, c, ch}, nil return &tcpListener{laddr, c, ch}, nil
} }
@ -131,7 +139,7 @@ type forwardList struct {
// forwardEntry represents an established mapping of a laddr on a // forwardEntry represents an established mapping of a laddr on a
// remote ssh server to a channel connected to a tcpListener. // remote ssh server to a channel connected to a tcpListener.
type forwardEntry struct { type forwardEntry struct {
laddr net.TCPAddr laddr net.Addr
c chan forward c chan forward
} }
@ -139,16 +147,16 @@ type forwardEntry struct {
// arguments to add/remove/lookup should be address as specified in // arguments to add/remove/lookup should be address as specified in
// the original forward-request. // the original forward-request.
type forward struct { type forward struct {
newCh NewChannel // the ssh client channel underlying this forward newCh NewChannel // the ssh client channel underlying this forward
raddr *net.TCPAddr // the raddr of the incoming connection raddr net.Addr // the raddr of the incoming connection
} }
func (l *forwardList) add(addr net.TCPAddr) chan forward { func (l *forwardList) add(addr net.Addr) chan forward {
l.Lock() l.Lock()
defer l.Unlock() defer l.Unlock()
f := forwardEntry{ f := forwardEntry{
addr, laddr: addr,
make(chan forward, 1), c: make(chan forward, 1),
} }
l.entries = append(l.entries, f) l.entries = append(l.entries, f)
return f.c return f.c
@ -176,44 +184,69 @@ func parseTCPAddr(addr string, port uint32) (*net.TCPAddr, error) {
func (l *forwardList) handleChannels(in <-chan NewChannel) { func (l *forwardList) handleChannels(in <-chan NewChannel) {
for ch := range in { for ch := range in {
var payload forwardedTCPPayload var (
if err := Unmarshal(ch.ExtraData(), &payload); err != nil { laddr net.Addr
ch.Reject(ConnectionFailed, "could not parse forwarded-tcpip payload: "+err.Error()) raddr net.Addr
continue err error
} )
switch channelType := ch.ChannelType(); channelType {
case "forwarded-tcpip":
var payload forwardedTCPPayload
if err = Unmarshal(ch.ExtraData(), &payload); err != nil {
ch.Reject(ConnectionFailed, "could not parse forwarded-tcpip payload: "+err.Error())
continue
}
// RFC 4254 section 7.2 specifies that incoming // RFC 4254 section 7.2 specifies that incoming
// addresses should list the address, in string // addresses should list the address, in string
// format. It is implied that this should be an IP // format. It is implied that this should be an IP
// address, as it would be impossible to connect to it // address, as it would be impossible to connect to it
// otherwise. // otherwise.
laddr, err := parseTCPAddr(payload.Addr, payload.Port) laddr, err = parseTCPAddr(payload.Addr, payload.Port)
if err != nil { if err != nil {
ch.Reject(ConnectionFailed, err.Error()) ch.Reject(ConnectionFailed, err.Error())
continue continue
} }
raddr, err := parseTCPAddr(payload.OriginAddr, payload.OriginPort) raddr, err = parseTCPAddr(payload.OriginAddr, payload.OriginPort)
if err != nil { if err != nil {
ch.Reject(ConnectionFailed, err.Error()) ch.Reject(ConnectionFailed, err.Error())
continue continue
} }
if ok := l.forward(*laddr, *raddr, ch); !ok { case "forwarded-streamlocal@openssh.com":
var payload forwardedStreamLocalPayload
if err = Unmarshal(ch.ExtraData(), &payload); err != nil {
ch.Reject(ConnectionFailed, "could not parse forwarded-streamlocal@openssh.com payload: "+err.Error())
continue
}
laddr = &net.UnixAddr{
Name: payload.SocketPath,
Net: "unix",
}
raddr = &net.UnixAddr{
Name: "@",
Net: "unix",
}
default:
panic(fmt.Errorf("ssh: unknown channel type %s", channelType))
}
if ok := l.forward(laddr, raddr, ch); !ok {
// Section 7.2, implementations MUST reject spurious incoming // Section 7.2, implementations MUST reject spurious incoming
// connections. // connections.
ch.Reject(Prohibited, "no forward for address") ch.Reject(Prohibited, "no forward for address")
continue continue
} }
} }
} }
// remove removes the forward entry, and the channel feeding its // remove removes the forward entry, and the channel feeding its
// listener. // listener.
func (l *forwardList) remove(addr net.TCPAddr) { func (l *forwardList) remove(addr net.Addr) {
l.Lock() l.Lock()
defer l.Unlock() defer l.Unlock()
for i, f := range l.entries { for i, f := range l.entries {
if addr.IP.Equal(f.laddr.IP) && addr.Port == f.laddr.Port { if addr.Network() == f.laddr.Network() && addr.String() == f.laddr.String() {
l.entries = append(l.entries[:i], l.entries[i+1:]...) l.entries = append(l.entries[:i], l.entries[i+1:]...)
close(f.c) close(f.c)
return return
@ -231,12 +264,12 @@ func (l *forwardList) closeAll() {
l.entries = nil l.entries = nil
} }
func (l *forwardList) forward(laddr, raddr net.TCPAddr, ch NewChannel) bool { func (l *forwardList) forward(laddr, raddr net.Addr, ch NewChannel) bool {
l.Lock() l.Lock()
defer l.Unlock() defer l.Unlock()
for _, f := range l.entries { for _, f := range l.entries {
if laddr.IP.Equal(f.laddr.IP) && laddr.Port == f.laddr.Port { if laddr.Network() == f.laddr.Network() && laddr.String() == f.laddr.String() {
f.c <- forward{ch, &raddr} f.c <- forward{newCh: ch, raddr: raddr}
return true return true
} }
} }
@ -262,7 +295,7 @@ func (l *tcpListener) Accept() (net.Conn, error) {
} }
go DiscardRequests(incoming) go DiscardRequests(incoming)
return &tcpChanConn{ return &chanConn{
Channel: ch, Channel: ch,
laddr: l.laddr, laddr: l.laddr,
raddr: s.raddr, raddr: s.raddr,
@ -277,7 +310,7 @@ func (l *tcpListener) Close() error {
} }
// this also closes the listener. // this also closes the listener.
l.conn.forwards.remove(*l.laddr) l.conn.forwards.remove(l.laddr)
ok, _, err := l.conn.SendRequest("cancel-tcpip-forward", true, Marshal(&m)) ok, _, err := l.conn.SendRequest("cancel-tcpip-forward", true, Marshal(&m))
if err == nil && !ok { if err == nil && !ok {
err = errors.New("ssh: cancel-tcpip-forward failed") err = errors.New("ssh: cancel-tcpip-forward failed")
@ -293,29 +326,52 @@ func (l *tcpListener) Addr() net.Addr {
// Dial initiates a connection to the addr from the remote host. // Dial initiates a connection to the addr from the remote host.
// The resulting connection has a zero LocalAddr() and RemoteAddr(). // The resulting connection has a zero LocalAddr() and RemoteAddr().
func (c *Client) Dial(n, addr string) (net.Conn, error) { func (c *Client) Dial(n, addr string) (net.Conn, error) {
// Parse the address into host and numeric port. var ch Channel
host, portString, err := net.SplitHostPort(addr) switch n {
if err != nil { case "tcp", "tcp4", "tcp6":
return nil, err // Parse the address into host and numeric port.
host, portString, err := net.SplitHostPort(addr)
if err != nil {
return nil, err
}
port, err := strconv.ParseUint(portString, 10, 16)
if err != nil {
return nil, err
}
ch, err = c.dial(net.IPv4zero.String(), 0, host, int(port))
if err != nil {
return nil, err
}
// Use a zero address for local and remote address.
zeroAddr := &net.TCPAddr{
IP: net.IPv4zero,
Port: 0,
}
return &chanConn{
Channel: ch,
laddr: zeroAddr,
raddr: zeroAddr,
}, nil
case "unix":
var err error
ch, err = c.dialStreamLocal(addr)
if err != nil {
return nil, err
}
return &chanConn{
Channel: ch,
laddr: &net.UnixAddr{
Name: "@",
Net: "unix",
},
raddr: &net.UnixAddr{
Name: addr,
Net: "unix",
},
}, nil
default:
return nil, fmt.Errorf("ssh: unsupported protocol: %s", n)
} }
port, err := strconv.ParseUint(portString, 10, 16)
if err != nil {
return nil, err
}
// Use a zero address for local and remote address.
zeroAddr := &net.TCPAddr{
IP: net.IPv4zero,
Port: 0,
}
ch, err := c.dial(net.IPv4zero.String(), 0, host, int(port))
if err != nil {
return nil, err
}
return &tcpChanConn{
Channel: ch,
laddr: zeroAddr,
raddr: zeroAddr,
}, nil
} }
// DialTCP connects to the remote address raddr on the network net, // DialTCP connects to the remote address raddr on the network net,
@ -332,7 +388,7 @@ func (c *Client) DialTCP(n string, laddr, raddr *net.TCPAddr) (net.Conn, error)
if err != nil { if err != nil {
return nil, err return nil, err
} }
return &tcpChanConn{ return &chanConn{
Channel: ch, Channel: ch,
laddr: laddr, laddr: laddr,
raddr: raddr, raddr: raddr,
@ -366,26 +422,26 @@ type tcpChan struct {
Channel // the backing channel Channel // the backing channel
} }
// tcpChanConn fulfills the net.Conn interface without // chanConn fulfills the net.Conn interface without
// the tcpChan having to hold laddr or raddr directly. // the tcpChan having to hold laddr or raddr directly.
type tcpChanConn struct { type chanConn struct {
Channel Channel
laddr, raddr net.Addr laddr, raddr net.Addr
} }
// LocalAddr returns the local network address. // LocalAddr returns the local network address.
func (t *tcpChanConn) LocalAddr() net.Addr { func (t *chanConn) LocalAddr() net.Addr {
return t.laddr return t.laddr
} }
// RemoteAddr returns the remote network address. // RemoteAddr returns the remote network address.
func (t *tcpChanConn) RemoteAddr() net.Addr { func (t *chanConn) RemoteAddr() net.Addr {
return t.raddr return t.raddr
} }
// SetDeadline sets the read and write deadlines associated // SetDeadline sets the read and write deadlines associated
// with the connection. // with the connection.
func (t *tcpChanConn) SetDeadline(deadline time.Time) error { func (t *chanConn) SetDeadline(deadline time.Time) error {
if err := t.SetReadDeadline(deadline); err != nil { if err := t.SetReadDeadline(deadline); err != nil {
return err return err
} }
@ -396,12 +452,14 @@ func (t *tcpChanConn) SetDeadline(deadline time.Time) error {
// A zero value for t means Read will not time out. // A zero value for t means Read will not time out.
// After the deadline, the error from Read will implement net.Error // After the deadline, the error from Read will implement net.Error
// with Timeout() == true. // with Timeout() == true.
func (t *tcpChanConn) SetReadDeadline(deadline time.Time) error { func (t *chanConn) SetReadDeadline(deadline time.Time) error {
// for compatibility with previous version,
// the error message contains "tcpChan"
return errors.New("ssh: tcpChan: deadline not supported") return errors.New("ssh: tcpChan: deadline not supported")
} }
// SetWriteDeadline exists to satisfy the net.Conn interface // SetWriteDeadline exists to satisfy the net.Conn interface
// but is not implemented by this type. It always returns an error. // but is not implemented by this type. It always returns an error.
func (t *tcpChanConn) SetWriteDeadline(deadline time.Time) error { func (t *chanConn) SetWriteDeadline(deadline time.Time) error {
return errors.New("ssh: tcpChan: deadline not supported") return errors.New("ssh: tcpChan: deadline not supported")
} }

52
vendor/golang.org/x/crypto/ssh/transport.go generated vendored
View file

@ -8,8 +8,13 @@ import (
"bufio" "bufio"
"errors" "errors"
"io" "io"
"log"
) )
// debugTransport if set, will print packet types as they go over the
// wire. No message decoding is done, to minimize the impact on timing.
const debugTransport = false
const ( const (
gcmCipherID = "aes128-gcm@openssh.com" gcmCipherID = "aes128-gcm@openssh.com"
aes128cbcID = "aes128-cbc" aes128cbcID = "aes128-cbc"
@ -22,7 +27,9 @@ type packetConn interface {
// Encrypt and send a packet of data to the remote peer. // Encrypt and send a packet of data to the remote peer.
writePacket(packet []byte) error writePacket(packet []byte) error
// Read a packet from the connection // Read a packet from the connection. The read is blocking,
// i.e. if error is nil, then the returned byte slice is
// always non-empty.
readPacket() ([]byte, error) readPacket() ([]byte, error)
// Close closes the write-side of the connection. // Close closes the write-side of the connection.
@ -38,7 +45,7 @@ type transport struct {
bufReader *bufio.Reader bufReader *bufio.Reader
bufWriter *bufio.Writer bufWriter *bufio.Writer
rand io.Reader rand io.Reader
isClient bool
io.Closer io.Closer
} }
@ -84,9 +91,38 @@ func (t *transport) prepareKeyChange(algs *algorithms, kexResult *kexResult) err
return nil return nil
} }
func (t *transport) printPacket(p []byte, write bool) {
if len(p) == 0 {
return
}
who := "server"
if t.isClient {
who = "client"
}
what := "read"
if write {
what = "write"
}
log.Println(what, who, p[0])
}
// Read and decrypt next packet. // Read and decrypt next packet.
func (t *transport) readPacket() ([]byte, error) { func (t *transport) readPacket() (p []byte, err error) {
return t.reader.readPacket(t.bufReader) for {
p, err = t.reader.readPacket(t.bufReader)
if err != nil {
break
}
if len(p) == 0 || (p[0] != msgIgnore && p[0] != msgDebug) {
break
}
}
if debugTransport {
t.printPacket(p, false)
}
return p, err
} }
func (s *connectionState) readPacket(r *bufio.Reader) ([]byte, error) { func (s *connectionState) readPacket(r *bufio.Reader) ([]byte, error) {
@ -129,6 +165,9 @@ func (s *connectionState) readPacket(r *bufio.Reader) ([]byte, error) {
} }
func (t *transport) writePacket(packet []byte) error { func (t *transport) writePacket(packet []byte) error {
if debugTransport {
t.printPacket(packet, true)
}
return t.writer.writePacket(t.bufWriter, t.rand, packet) return t.writer.writePacket(t.bufWriter, t.rand, packet)
} }
@ -169,6 +208,8 @@ func newTransport(rwc io.ReadWriteCloser, rand io.Reader, isClient bool) *transp
}, },
Closer: rwc, Closer: rwc,
} }
t.isClient = isClient
if isClient { if isClient {
t.reader.dir = serverKeys t.reader.dir = serverKeys
t.writer.dir = clientKeys t.writer.dir = clientKeys
@ -213,7 +254,7 @@ func newPacketCipher(d direction, algs directionAlgorithms, kex *kexResult) (pac
iv, key, macKey := generateKeys(d, algs, kex) iv, key, macKey := generateKeys(d, algs, kex)
if algs.Cipher == gcmCipherID { if algs.Cipher == gcmCipherID {
return newGCMCipher(iv, key, macKey) return newGCMCipher(iv, key)
} }
if algs.Cipher == aes128cbcID { if algs.Cipher == aes128cbcID {
@ -226,6 +267,7 @@ func newPacketCipher(d direction, algs directionAlgorithms, kex *kexResult) (pac
c := &streamPacketCipher{ c := &streamPacketCipher{
mac: macModes[algs.MAC].new(macKey), mac: macModes[algs.MAC].new(macKey),
etm: macModes[algs.MAC].etm,
} }
c.macResult = make([]byte, c.mac.Size()) c.macResult = make([]byte, c.mac.Size())

30
vendor/vendor.json vendored
View file

@ -1279,40 +1279,40 @@
"revisionTime": "2016-09-14T08:04:27Z" "revisionTime": "2016-09-14T08:04:27Z"
}, },
{ {
"checksumSHA1": "dwOedwBJ1EIK9+S3t108Bx054Y8=", "checksumSHA1": "sFH/xPPl/UZgLj+ypPNPlT+2Sx0=",
"path": "golang.org/x/crypto/curve25519", "path": "golang.org/x/crypto/curve25519",
"revision": "9477e0b78b9ac3d0b03822fd95422e2fe07627cd", "revision": "9f005a07e0d31d45e6656d241bb5c0f2efd4bc94",
"revisionTime": "2016-10-31T15:37:30Z" "revisionTime": "2017-09-21T17:41:56Z"
}, },
{ {
"checksumSHA1": "wGb//LjBPNxYHqk+dcLo7BjPXK8=", "checksumSHA1": "1hwn8cgg4EVXhCpJIqmMbzqnUo0=",
"path": "golang.org/x/crypto/ed25519", "path": "golang.org/x/crypto/ed25519",
"revision": "9477e0b78b9ac3d0b03822fd95422e2fe07627cd", "revision": "9f005a07e0d31d45e6656d241bb5c0f2efd4bc94",
"revisionTime": "2016-10-31T15:37:30Z" "revisionTime": "2017-09-21T17:41:56Z"
}, },
{ {
"checksumSHA1": "LXFcVx8I587SnWmKycSDEq9yvK8=", "checksumSHA1": "LXFcVx8I587SnWmKycSDEq9yvK8=",
"path": "golang.org/x/crypto/ed25519/internal/edwards25519", "path": "golang.org/x/crypto/ed25519/internal/edwards25519",
"revision": "9477e0b78b9ac3d0b03822fd95422e2fe07627cd", "revision": "9f005a07e0d31d45e6656d241bb5c0f2efd4bc94",
"revisionTime": "2016-10-31T15:37:30Z" "revisionTime": "2017-09-21T17:41:56Z"
}, },
{ {
"checksumSHA1": "MCeXr2RNeiG1XG6V+er1OR0qyeo=", "checksumSHA1": "MCeXr2RNeiG1XG6V+er1OR0qyeo=",
"path": "golang.org/x/crypto/md4", "path": "golang.org/x/crypto/md4",
"revision": "ede567c8e044a5913dad1d1af3696d9da953104c", "revision": "9f005a07e0d31d45e6656d241bb5c0f2efd4bc94",
"revisionTime": "2016-11-04T19:41:44Z" "revisionTime": "2017-09-21T17:41:56Z"
}, },
{ {
"checksumSHA1": "1MGpGDQqnUoRpv7VEcQrXOBydXE=", "checksumSHA1": "1MGpGDQqnUoRpv7VEcQrXOBydXE=",
"path": "golang.org/x/crypto/pbkdf2", "path": "golang.org/x/crypto/pbkdf2",
"revision": "8e06e8ddd9629eb88639aba897641bff8031f1d3", "revision": "9f005a07e0d31d45e6656d241bb5c0f2efd4bc94",
"revisionTime": "2016-09-10T18:59:01Z" "revisionTime": "2017-09-21T17:41:56Z"
}, },
{ {
"checksumSHA1": "LlElMHeTC34ng8eHzjvtUhAgrr8=", "checksumSHA1": "YXeyyvak2xbvsqj5MBHMzyG+22M=",
"path": "golang.org/x/crypto/ssh", "path": "golang.org/x/crypto/ssh",
"revision": "9477e0b78b9ac3d0b03822fd95422e2fe07627cd", "revision": "9f005a07e0d31d45e6656d241bb5c0f2efd4bc94",
"revisionTime": "2016-10-31T15:37:30Z" "revisionTime": "2017-09-21T17:41:56Z"
}, },
{ {
"checksumSHA1": "9jjO5GjLa0XF/nfWihF02RoH4qc=", "checksumSHA1": "9jjO5GjLa0XF/nfWihF02RoH4qc=",