bench-forgejo/models/ssh_key.go
mrsdizzie dce22efbee Fix SSH2 conditonal in key parsing code (#8806)
Avoid out of bounds error by using strings.HasPrefix to check for
starting SSH2 text rather than assuming user input has at least 31
characters.

Add tests for bad input as well.

Fixes #8800
2019-11-03 19:08:18 +08:00

998 lines
27 KiB
Go

// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package models
import (
"bufio"
"crypto/rsa"
"crypto/x509"
"encoding/asn1"
"encoding/base64"
"encoding/binary"
"encoding/pem"
"errors"
"fmt"
"io/ioutil"
"math/big"
"os"
"path/filepath"
"strings"
"sync"
"time"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/timeutil"
"github.com/unknwon/com"
"golang.org/x/crypto/ssh"
"xorm.io/builder"
"xorm.io/xorm"
)
const (
tplCommentPrefix = `# gitea public key`
tplPublicKey = tplCommentPrefix + "\n" + `command="%s --config='%s' serv key-%d",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty %s` + "\n"
)
var sshOpLocker sync.Mutex
// KeyType specifies the key type
type KeyType int
const (
// KeyTypeUser specifies the user key
KeyTypeUser = iota + 1
// KeyTypeDeploy specifies the deploy key
KeyTypeDeploy
)
// PublicKey represents a user or deploy SSH public key.
type PublicKey struct {
ID int64 `xorm:"pk autoincr"`
OwnerID int64 `xorm:"INDEX NOT NULL"`
Name string `xorm:"NOT NULL"`
Fingerprint string `xorm:"INDEX NOT NULL"`
Content string `xorm:"TEXT NOT NULL"`
Mode AccessMode `xorm:"NOT NULL DEFAULT 2"`
Type KeyType `xorm:"NOT NULL DEFAULT 1"`
LoginSourceID int64 `xorm:"NOT NULL DEFAULT 0"`
CreatedUnix timeutil.TimeStamp `xorm:"created"`
UpdatedUnix timeutil.TimeStamp `xorm:"updated"`
HasRecentActivity bool `xorm:"-"`
HasUsed bool `xorm:"-"`
}
// AfterLoad is invoked from XORM after setting the values of all fields of this object.
func (key *PublicKey) AfterLoad() {
key.HasUsed = key.UpdatedUnix > key.CreatedUnix
key.HasRecentActivity = key.UpdatedUnix.AddDuration(7*24*time.Hour) > timeutil.TimeStampNow()
}
// OmitEmail returns content of public key without email address.
func (key *PublicKey) OmitEmail() string {
return strings.Join(strings.Split(key.Content, " ")[:2], " ")
}
// AuthorizedString returns formatted public key string for authorized_keys file.
func (key *PublicKey) AuthorizedString() string {
return fmt.Sprintf(tplPublicKey, setting.AppPath, setting.CustomConf, key.ID, key.Content)
}
func extractTypeFromBase64Key(key string) (string, error) {
b, err := base64.StdEncoding.DecodeString(key)
if err != nil || len(b) < 4 {
return "", fmt.Errorf("invalid key format: %v", err)
}
keyLength := int(binary.BigEndian.Uint32(b))
if len(b) < 4+keyLength {
return "", fmt.Errorf("invalid key format: not enough length %d", keyLength)
}
return string(b[4 : 4+keyLength]), nil
}
const ssh2keyStart = "---- BEGIN SSH2 PUBLIC KEY ----"
// parseKeyString parses any key string in OpenSSH or SSH2 format to clean OpenSSH string (RFC4253).
func parseKeyString(content string) (string, error) {
// remove whitespace at start and end
content = strings.TrimSpace(content)
var keyType, keyContent, keyComment string
if strings.HasPrefix(content, ssh2keyStart) {
// Parse SSH2 file format.
// Transform all legal line endings to a single "\n".
content = strings.NewReplacer("\r\n", "\n", "\r", "\n").Replace(content)
lines := strings.Split(content, "\n")
continuationLine := false
for _, line := range lines {
// Skip lines that:
// 1) are a continuation of the previous line,
// 2) contain ":" as that are comment lines
// 3) contain "-" as that are begin and end tags
if continuationLine || strings.ContainsAny(line, ":-") {
continuationLine = strings.HasSuffix(line, "\\")
} else {
keyContent += line
}
}
t, err := extractTypeFromBase64Key(keyContent)
if err != nil {
return "", fmt.Errorf("extractTypeFromBase64Key: %v", err)
}
keyType = t
} else {
if strings.Contains(content, "-----BEGIN") {
// Convert PEM Keys to OpenSSH format
// Transform all legal line endings to a single "\n".
content = strings.NewReplacer("\r\n", "\n", "\r", "\n").Replace(content)
block, _ := pem.Decode([]byte(content))
if block == nil {
return "", fmt.Errorf("failed to parse PEM block containing the public key")
}
pub, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
var pk rsa.PublicKey
_, err2 := asn1.Unmarshal(block.Bytes, &pk)
if err2 != nil {
return "", fmt.Errorf("failed to parse DER encoded public key as either PKIX or PEM RSA Key: %v %v", err, err2)
}
pub = &pk
}
sshKey, err := ssh.NewPublicKey(pub)
if err != nil {
return "", fmt.Errorf("unable to convert to ssh public key: %v", err)
}
content = string(ssh.MarshalAuthorizedKey(sshKey))
}
// Parse OpenSSH format.
// Remove all newlines
content = strings.NewReplacer("\r\n", "", "\n", "").Replace(content)
parts := strings.SplitN(content, " ", 3)
switch len(parts) {
case 0:
return "", errors.New("empty key")
case 1:
keyContent = parts[0]
case 2:
keyType = parts[0]
keyContent = parts[1]
default:
keyType = parts[0]
keyContent = parts[1]
keyComment = parts[2]
}
// If keyType is not given, extract it from content. If given, validate it.
t, err := extractTypeFromBase64Key(keyContent)
if err != nil {
return "", fmt.Errorf("extractTypeFromBase64Key: %v", err)
}
if len(keyType) == 0 {
keyType = t
} else if keyType != t {
return "", fmt.Errorf("key type and content does not match: %s - %s", keyType, t)
}
}
// Finally we need to check whether we can actually read the proposed key:
_, _, _, _, err := ssh.ParseAuthorizedKey([]byte(keyType + " " + keyContent + " " + keyComment))
if err != nil {
return "", fmt.Errorf("invalid ssh public key: %v", err)
}
return keyType + " " + keyContent + " " + keyComment, nil
}
// writeTmpKeyFile writes key content to a temporary file
// and returns the name of that file, along with any possible errors.
func writeTmpKeyFile(content string) (string, error) {
tmpFile, err := ioutil.TempFile(setting.SSH.KeyTestPath, "gitea_keytest")
if err != nil {
return "", fmt.Errorf("TempFile: %v", err)
}
defer tmpFile.Close()
if _, err = tmpFile.WriteString(content); err != nil {
return "", fmt.Errorf("WriteString: %v", err)
}
return tmpFile.Name(), nil
}
// SSHKeyGenParsePublicKey extracts key type and length using ssh-keygen.
func SSHKeyGenParsePublicKey(key string) (string, int, error) {
// The ssh-keygen in Windows does not print key type, so no need go further.
if setting.IsWindows {
return "", 0, nil
}
tmpName, err := writeTmpKeyFile(key)
if err != nil {
return "", 0, fmt.Errorf("writeTmpKeyFile: %v", err)
}
defer os.Remove(tmpName)
stdout, stderr, err := process.GetManager().Exec("SSHKeyGenParsePublicKey", setting.SSH.KeygenPath, "-lf", tmpName)
if err != nil {
return "", 0, fmt.Errorf("fail to parse public key: %s - %s", err, stderr)
}
if strings.Contains(stdout, "is not a public key file") {
return "", 0, ErrKeyUnableVerify{stdout}
}
fields := strings.Split(stdout, " ")
if len(fields) < 4 {
return "", 0, fmt.Errorf("invalid public key line: %s", stdout)
}
keyType := strings.Trim(fields[len(fields)-1], "()\r\n")
return strings.ToLower(keyType), com.StrTo(fields[0]).MustInt(), nil
}
// SSHNativeParsePublicKey extracts the key type and length using the golang SSH library.
func SSHNativeParsePublicKey(keyLine string) (string, int, error) {
fields := strings.Fields(keyLine)
if len(fields) < 2 {
return "", 0, fmt.Errorf("not enough fields in public key line: %s", keyLine)
}
raw, err := base64.StdEncoding.DecodeString(fields[1])
if err != nil {
return "", 0, err
}
pkey, err := ssh.ParsePublicKey(raw)
if err != nil {
if strings.Contains(err.Error(), "ssh: unknown key algorithm") {
return "", 0, ErrKeyUnableVerify{err.Error()}
}
return "", 0, fmt.Errorf("ParsePublicKey: %v", err)
}
// The ssh library can parse the key, so next we find out what key exactly we have.
switch pkey.Type() {
case ssh.KeyAlgoDSA:
rawPub := struct {
Name string
P, Q, G, Y *big.Int
}{}
if err := ssh.Unmarshal(pkey.Marshal(), &rawPub); err != nil {
return "", 0, err
}
// as per https://bugzilla.mindrot.org/show_bug.cgi?id=1647 we should never
// see dsa keys != 1024 bit, but as it seems to work, we will not check here
return "dsa", rawPub.P.BitLen(), nil // use P as per crypto/dsa/dsa.go (is L)
case ssh.KeyAlgoRSA:
rawPub := struct {
Name string
E *big.Int
N *big.Int
}{}
if err := ssh.Unmarshal(pkey.Marshal(), &rawPub); err != nil {
return "", 0, err
}
return "rsa", rawPub.N.BitLen(), nil // use N as per crypto/rsa/rsa.go (is bits)
case ssh.KeyAlgoECDSA256:
return "ecdsa", 256, nil
case ssh.KeyAlgoECDSA384:
return "ecdsa", 384, nil
case ssh.KeyAlgoECDSA521:
return "ecdsa", 521, nil
case ssh.KeyAlgoED25519:
return "ed25519", 256, nil
}
return "", 0, fmt.Errorf("unsupported key length detection for type: %s", pkey.Type())
}
// CheckPublicKeyString checks if the given public key string is recognized by SSH.
// It returns the actual public key line on success.
func CheckPublicKeyString(content string) (_ string, err error) {
if setting.SSH.Disabled {
return "", ErrSSHDisabled{}
}
content, err = parseKeyString(content)
if err != nil {
return "", err
}
content = strings.TrimRight(content, "\n\r")
if strings.ContainsAny(content, "\n\r") {
return "", errors.New("only a single line with a single key please")
}
// remove any unnecessary whitespace now
content = strings.TrimSpace(content)
if !setting.SSH.MinimumKeySizeCheck {
return content, nil
}
var (
fnName string
keyType string
length int
)
if setting.SSH.StartBuiltinServer {
fnName = "SSHNativeParsePublicKey"
keyType, length, err = SSHNativeParsePublicKey(content)
} else {
fnName = "SSHKeyGenParsePublicKey"
keyType, length, err = SSHKeyGenParsePublicKey(content)
}
if err != nil {
return "", fmt.Errorf("%s: %v", fnName, err)
}
log.Trace("Key info [native: %v]: %s-%d", setting.SSH.StartBuiltinServer, keyType, length)
if minLen, found := setting.SSH.MinimumKeySizes[keyType]; found && length >= minLen {
return content, nil
} else if found && length < minLen {
return "", fmt.Errorf("key length is not enough: got %d, needs %d", length, minLen)
}
return "", fmt.Errorf("key type is not allowed: %s", keyType)
}
// appendAuthorizedKeysToFile appends new SSH keys' content to authorized_keys file.
func appendAuthorizedKeysToFile(keys ...*PublicKey) error {
// Don't need to rewrite this file if builtin SSH server is enabled.
if setting.SSH.StartBuiltinServer {
return nil
}
sshOpLocker.Lock()
defer sshOpLocker.Unlock()
if setting.SSH.RootPath != "" {
// First of ensure that the RootPath is present, and if not make it with 0700 permissions
// This of course doesn't guarantee that this is the right directory for authorized_keys
// but at least if it's supposed to be this directory and it doesn't exist and we're the
// right user it will at least be created properly.
err := os.MkdirAll(setting.SSH.RootPath, 0700)
if err != nil {
log.Error("Unable to MkdirAll(%s): %v", setting.SSH.RootPath, err)
return err
}
}
fPath := filepath.Join(setting.SSH.RootPath, "authorized_keys")
f, err := os.OpenFile(fPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600)
if err != nil {
return err
}
defer f.Close()
// Note: chmod command does not support in Windows.
if !setting.IsWindows {
fi, err := f.Stat()
if err != nil {
return err
}
// .ssh directory should have mode 700, and authorized_keys file should have mode 600.
if fi.Mode().Perm() > 0600 {
log.Error("authorized_keys file has unusual permission flags: %s - setting to -rw-------", fi.Mode().Perm().String())
if err = f.Chmod(0600); err != nil {
return err
}
}
}
for _, key := range keys {
if _, err = f.WriteString(key.AuthorizedString()); err != nil {
return err
}
}
return nil
}
// checkKeyFingerprint only checks if key fingerprint has been used as public key,
// it is OK to use same key as deploy key for multiple repositories/users.
func checkKeyFingerprint(e Engine, fingerprint string) error {
has, err := e.Get(&PublicKey{
Fingerprint: fingerprint,
})
if err != nil {
return err
} else if has {
return ErrKeyAlreadyExist{0, fingerprint, ""}
}
return nil
}
func calcFingerprintSSHKeygen(publicKeyContent string) (string, error) {
// Calculate fingerprint.
tmpPath, err := writeTmpKeyFile(publicKeyContent)
if err != nil {
return "", err
}
defer os.Remove(tmpPath)
stdout, stderr, err := process.GetManager().Exec("AddPublicKey", "ssh-keygen", "-lf", tmpPath)
if err != nil {
return "", fmt.Errorf("'ssh-keygen -lf %s' failed with error '%s': %s", tmpPath, err, stderr)
} else if len(stdout) < 2 {
return "", errors.New("not enough output for calculating fingerprint: " + stdout)
}
return strings.Split(stdout, " ")[1], nil
}
func calcFingerprintNative(publicKeyContent string) (string, error) {
// Calculate fingerprint.
pk, _, _, _, err := ssh.ParseAuthorizedKey([]byte(publicKeyContent))
if err != nil {
return "", err
}
return ssh.FingerprintSHA256(pk), nil
}
func calcFingerprint(publicKeyContent string) (string, error) {
//Call the method based on configuration
var (
fnName, fp string
err error
)
if setting.SSH.StartBuiltinServer {
fnName = "calcFingerprintNative"
fp, err = calcFingerprintNative(publicKeyContent)
} else {
fnName = "calcFingerprintSSHKeygen"
fp, err = calcFingerprintSSHKeygen(publicKeyContent)
}
if err != nil {
return "", fmt.Errorf("%s: %v", fnName, err)
}
return fp, nil
}
func addKey(e Engine, key *PublicKey) (err error) {
if len(key.Fingerprint) == 0 {
key.Fingerprint, err = calcFingerprint(key.Content)
if err != nil {
return err
}
}
// Save SSH key.
if _, err = e.Insert(key); err != nil {
return err
}
return appendAuthorizedKeysToFile(key)
}
// AddPublicKey adds new public key to database and authorized_keys file.
func AddPublicKey(ownerID int64, name, content string, loginSourceID int64) (*PublicKey, error) {
log.Trace(content)
fingerprint, err := calcFingerprint(content)
if err != nil {
return nil, err
}
sess := x.NewSession()
defer sess.Close()
if err = sess.Begin(); err != nil {
return nil, err
}
if err := checkKeyFingerprint(sess, fingerprint); err != nil {
return nil, err
}
// Key name of same user cannot be duplicated.
has, err := sess.
Where("owner_id = ? AND name = ?", ownerID, name).
Get(new(PublicKey))
if err != nil {
return nil, err
} else if has {
return nil, ErrKeyNameAlreadyUsed{ownerID, name}
}
key := &PublicKey{
OwnerID: ownerID,
Name: name,
Fingerprint: fingerprint,
Content: content,
Mode: AccessModeWrite,
Type: KeyTypeUser,
LoginSourceID: loginSourceID,
}
if err = addKey(sess, key); err != nil {
return nil, fmt.Errorf("addKey: %v", err)
}
return key, sess.Commit()
}
// GetPublicKeyByID returns public key by given ID.
func GetPublicKeyByID(keyID int64) (*PublicKey, error) {
key := new(PublicKey)
has, err := x.
Id(keyID).
Get(key)
if err != nil {
return nil, err
} else if !has {
return nil, ErrKeyNotExist{keyID}
}
return key, nil
}
func searchPublicKeyByContentWithEngine(e Engine, content string) (*PublicKey, error) {
key := new(PublicKey)
has, err := e.
Where("content like ?", content+"%").
Get(key)
if err != nil {
return nil, err
} else if !has {
return nil, ErrKeyNotExist{}
}
return key, nil
}
// SearchPublicKeyByContent searches content as prefix (leak e-mail part)
// and returns public key found.
func SearchPublicKeyByContent(content string) (*PublicKey, error) {
return searchPublicKeyByContentWithEngine(x, content)
}
// SearchPublicKey returns a list of public keys matching the provided arguments.
func SearchPublicKey(uid int64, fingerprint string) ([]*PublicKey, error) {
keys := make([]*PublicKey, 0, 5)
cond := builder.NewCond()
if uid != 0 {
cond = cond.And(builder.Eq{"owner_id": uid})
}
if fingerprint != "" {
cond = cond.And(builder.Eq{"fingerprint": fingerprint})
}
return keys, x.Where(cond).Find(&keys)
}
// ListPublicKeys returns a list of public keys belongs to given user.
func ListPublicKeys(uid int64) ([]*PublicKey, error) {
keys := make([]*PublicKey, 0, 5)
return keys, x.
Where("owner_id = ?", uid).
Find(&keys)
}
// ListPublicLdapSSHKeys returns a list of synchronized public ldap ssh keys belongs to given user and login source.
func ListPublicLdapSSHKeys(uid int64, loginSourceID int64) ([]*PublicKey, error) {
keys := make([]*PublicKey, 0, 5)
return keys, x.
Where("owner_id = ? AND login_source_id = ?", uid, loginSourceID).
Find(&keys)
}
// UpdatePublicKeyUpdated updates public key use time.
func UpdatePublicKeyUpdated(id int64) error {
// Check if key exists before update as affected rows count is unreliable
// and will return 0 affected rows if two updates are made at the same time
if cnt, err := x.ID(id).Count(&PublicKey{}); err != nil {
return err
} else if cnt != 1 {
return ErrKeyNotExist{id}
}
_, err := x.ID(id).Cols("updated_unix").Update(&PublicKey{
UpdatedUnix: timeutil.TimeStampNow(),
})
if err != nil {
return err
}
return nil
}
// deletePublicKeys does the actual key deletion but does not update authorized_keys file.
func deletePublicKeys(e Engine, keyIDs ...int64) error {
if len(keyIDs) == 0 {
return nil
}
_, err := e.In("id", keyIDs).Delete(new(PublicKey))
return err
}
// DeletePublicKey deletes SSH key information both in database and authorized_keys file.
func DeletePublicKey(doer *User, id int64) (err error) {
key, err := GetPublicKeyByID(id)
if err != nil {
return err
}
// Check if user has access to delete this key.
if !doer.IsAdmin && doer.ID != key.OwnerID {
return ErrKeyAccessDenied{doer.ID, key.ID, "public"}
}
sess := x.NewSession()
defer sess.Close()
if err = sess.Begin(); err != nil {
return err
}
if err = deletePublicKeys(sess, id); err != nil {
return err
}
if err = sess.Commit(); err != nil {
return err
}
sess.Close()
return RewriteAllPublicKeys()
}
// RewriteAllPublicKeys removes any authorized key and rewrite all keys from database again.
// Note: x.Iterate does not get latest data after insert/delete, so we have to call this function
// outside any session scope independently.
func RewriteAllPublicKeys() error {
return rewriteAllPublicKeys(x)
}
func rewriteAllPublicKeys(e Engine) error {
//Don't rewrite key if internal server
if setting.SSH.StartBuiltinServer || !setting.SSH.CreateAuthorizedKeysFile {
return nil
}
sshOpLocker.Lock()
defer sshOpLocker.Unlock()
if setting.SSH.RootPath != "" {
// First of ensure that the RootPath is present, and if not make it with 0700 permissions
// This of course doesn't guarantee that this is the right directory for authorized_keys
// but at least if it's supposed to be this directory and it doesn't exist and we're the
// right user it will at least be created properly.
err := os.MkdirAll(setting.SSH.RootPath, 0700)
if err != nil {
log.Error("Unable to MkdirAll(%s): %v", setting.SSH.RootPath, err)
return err
}
}
fPath := filepath.Join(setting.SSH.RootPath, "authorized_keys")
tmpPath := fPath + ".tmp"
t, err := os.OpenFile(tmpPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
if err != nil {
return err
}
defer func() {
t.Close()
os.Remove(tmpPath)
}()
if setting.SSH.AuthorizedKeysBackup && com.IsExist(fPath) {
bakPath := fmt.Sprintf("%s_%d.gitea_bak", fPath, time.Now().Unix())
if err = com.Copy(fPath, bakPath); err != nil {
return err
}
}
err = e.Iterate(new(PublicKey), func(idx int, bean interface{}) (err error) {
_, err = t.WriteString((bean.(*PublicKey)).AuthorizedString())
return err
})
if err != nil {
return err
}
if com.IsExist(fPath) {
f, err := os.Open(fPath)
if err != nil {
return err
}
scanner := bufio.NewScanner(f)
for scanner.Scan() {
line := scanner.Text()
if strings.HasPrefix(line, tplCommentPrefix) {
scanner.Scan()
continue
}
_, err = t.WriteString(line + "\n")
if err != nil {
f.Close()
return err
}
}
f.Close()
}
t.Close()
return os.Rename(tmpPath, fPath)
}
// ________ .__ ____ __.
// \______ \ ____ ______ | | ____ ___.__.| |/ _|____ ___.__.
// | | \_/ __ \\____ \| | / _ < | || <_/ __ < | |
// | ` \ ___/| |_> > |_( <_> )___ || | \ ___/\___ |
// /_______ /\___ > __/|____/\____// ____||____|__ \___ > ____|
// \/ \/|__| \/ \/ \/\/
// DeployKey represents deploy key information and its relation with repository.
type DeployKey struct {
ID int64 `xorm:"pk autoincr"`
KeyID int64 `xorm:"UNIQUE(s) INDEX"`
RepoID int64 `xorm:"UNIQUE(s) INDEX"`
Name string
Fingerprint string
Content string `xorm:"-"`
Mode AccessMode `xorm:"NOT NULL DEFAULT 1"`
CreatedUnix timeutil.TimeStamp `xorm:"created"`
UpdatedUnix timeutil.TimeStamp `xorm:"updated"`
HasRecentActivity bool `xorm:"-"`
HasUsed bool `xorm:"-"`
}
// AfterLoad is invoked from XORM after setting the values of all fields of this object.
func (key *DeployKey) AfterLoad() {
key.HasUsed = key.UpdatedUnix > key.CreatedUnix
key.HasRecentActivity = key.UpdatedUnix.AddDuration(7*24*time.Hour) > timeutil.TimeStampNow()
}
// GetContent gets associated public key content.
func (key *DeployKey) GetContent() error {
pkey, err := GetPublicKeyByID(key.KeyID)
if err != nil {
return err
}
key.Content = pkey.Content
return nil
}
// IsReadOnly checks if the key can only be used for read operations
func (key *DeployKey) IsReadOnly() bool {
return key.Mode == AccessModeRead
}
func checkDeployKey(e Engine, keyID, repoID int64, name string) error {
// Note: We want error detail, not just true or false here.
has, err := e.
Where("key_id = ? AND repo_id = ?", keyID, repoID).
Get(new(DeployKey))
if err != nil {
return err
} else if has {
return ErrDeployKeyAlreadyExist{keyID, repoID}
}
has, err = e.
Where("repo_id = ? AND name = ?", repoID, name).
Get(new(DeployKey))
if err != nil {
return err
} else if has {
return ErrDeployKeyNameAlreadyUsed{repoID, name}
}
return nil
}
// addDeployKey adds new key-repo relation.
func addDeployKey(e *xorm.Session, keyID, repoID int64, name, fingerprint string, mode AccessMode) (*DeployKey, error) {
if err := checkDeployKey(e, keyID, repoID, name); err != nil {
return nil, err
}
key := &DeployKey{
KeyID: keyID,
RepoID: repoID,
Name: name,
Fingerprint: fingerprint,
Mode: mode,
}
_, err := e.Insert(key)
return key, err
}
// HasDeployKey returns true if public key is a deploy key of given repository.
func HasDeployKey(keyID, repoID int64) bool {
has, _ := x.
Where("key_id = ? AND repo_id = ?", keyID, repoID).
Get(new(DeployKey))
return has
}
// AddDeployKey add new deploy key to database and authorized_keys file.
func AddDeployKey(repoID int64, name, content string, readOnly bool) (*DeployKey, error) {
fingerprint, err := calcFingerprint(content)
if err != nil {
return nil, err
}
accessMode := AccessModeRead
if !readOnly {
accessMode = AccessModeWrite
}
sess := x.NewSession()
defer sess.Close()
if err = sess.Begin(); err != nil {
return nil, err
}
pkey := &PublicKey{
Fingerprint: fingerprint,
}
has, err := sess.Get(pkey)
if err != nil {
return nil, err
}
if has {
if pkey.Type != KeyTypeDeploy {
return nil, ErrKeyAlreadyExist{0, fingerprint, ""}
}
} else {
// First time use this deploy key.
pkey.Mode = accessMode
pkey.Type = KeyTypeDeploy
pkey.Content = content
pkey.Name = name
if err = addKey(sess, pkey); err != nil {
return nil, fmt.Errorf("addKey: %v", err)
}
}
key, err := addDeployKey(sess, pkey.ID, repoID, name, pkey.Fingerprint, accessMode)
if err != nil {
return nil, err
}
return key, sess.Commit()
}
// GetDeployKeyByID returns deploy key by given ID.
func GetDeployKeyByID(id int64) (*DeployKey, error) {
return getDeployKeyByID(x, id)
}
func getDeployKeyByID(e Engine, id int64) (*DeployKey, error) {
key := new(DeployKey)
has, err := e.ID(id).Get(key)
if err != nil {
return nil, err
} else if !has {
return nil, ErrDeployKeyNotExist{id, 0, 0}
}
return key, nil
}
// GetDeployKeyByRepo returns deploy key by given public key ID and repository ID.
func GetDeployKeyByRepo(keyID, repoID int64) (*DeployKey, error) {
return getDeployKeyByRepo(x, keyID, repoID)
}
func getDeployKeyByRepo(e Engine, keyID, repoID int64) (*DeployKey, error) {
key := &DeployKey{
KeyID: keyID,
RepoID: repoID,
}
has, err := e.Get(key)
if err != nil {
return nil, err
} else if !has {
return nil, ErrDeployKeyNotExist{0, keyID, repoID}
}
return key, nil
}
// UpdateDeployKeyCols updates deploy key information in the specified columns.
func UpdateDeployKeyCols(key *DeployKey, cols ...string) error {
_, err := x.ID(key.ID).Cols(cols...).Update(key)
return err
}
// UpdateDeployKey updates deploy key information.
func UpdateDeployKey(key *DeployKey) error {
_, err := x.ID(key.ID).AllCols().Update(key)
return err
}
// DeleteDeployKey deletes deploy key from its repository authorized_keys file if needed.
func DeleteDeployKey(doer *User, id int64) error {
sess := x.NewSession()
defer sess.Close()
if err := sess.Begin(); err != nil {
return err
}
if err := deleteDeployKey(sess, doer, id); err != nil {
return err
}
return sess.Commit()
}
func deleteDeployKey(sess Engine, doer *User, id int64) error {
key, err := getDeployKeyByID(sess, id)
if err != nil {
if IsErrDeployKeyNotExist(err) {
return nil
}
return fmt.Errorf("GetDeployKeyByID: %v", err)
}
// Check if user has access to delete this key.
if !doer.IsAdmin {
repo, err := getRepositoryByID(sess, key.RepoID)
if err != nil {
return fmt.Errorf("GetRepositoryByID: %v", err)
}
has, err := isUserRepoAdmin(sess, repo, doer)
if err != nil {
return fmt.Errorf("GetUserRepoPermission: %v", err)
} else if !has {
return ErrKeyAccessDenied{doer.ID, key.ID, "deploy"}
}
}
if _, err = sess.ID(key.ID).Delete(new(DeployKey)); err != nil {
return fmt.Errorf("delete deploy key [%d]: %v", key.ID, err)
}
// Check if this is the last reference to same key content.
has, err := sess.
Where("key_id = ?", key.KeyID).
Get(new(DeployKey))
if err != nil {
return err
} else if !has {
if err = deletePublicKeys(sess, key.KeyID); err != nil {
return err
}
// after deleted the public keys, should rewrite the public keys file
if err = rewriteAllPublicKeys(sess); err != nil {
return err
}
}
return nil
}
// ListDeployKeys returns all deploy keys by given repository ID.
func ListDeployKeys(repoID int64) ([]*DeployKey, error) {
return listDeployKeys(x, repoID)
}
func listDeployKeys(e Engine, repoID int64) ([]*DeployKey, error) {
keys := make([]*DeployKey, 0, 5)
return keys, e.
Where("repo_id = ?", repoID).
Find(&keys)
}
// SearchDeployKeys returns a list of deploy keys matching the provided arguments.
func SearchDeployKeys(repoID int64, keyID int64, fingerprint string) ([]*DeployKey, error) {
keys := make([]*DeployKey, 0, 5)
cond := builder.NewCond()
if repoID != 0 {
cond = cond.And(builder.Eq{"repo_id": repoID})
}
if keyID != 0 {
cond = cond.And(builder.Eq{"key_id": keyID})
}
if fingerprint != "" {
cond = cond.And(builder.Eq{"fingerprint": fingerprint})
}
return keys, x.Where(cond).Find(&keys)
}