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Trace Logging on Permission Denied & ColorFormat (#6618)

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* Add log.ColorFormat and log.ColorFormatted

Structs can now implement log.ColorFormatted to provide their own
colored format when logged with `%-v` or additional flags.

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add basic ColorFormat to repository and user

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add basic ColorFormat to access and unit

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add ColorFormat to permission and on trace log it

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add log.NewColoredIDValue to make ID value coloring consistent

Signed-off-by: Andrew Thornton <art27@cantab.net>

* formatting changes

* Add some better tracing to permission denied for read issues/pulls

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add Trace logging on permission denied

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Remove isTrace() check from deferred func

* Adjust repo and allow logging of team

* use FormatInt instead of Itoa

* Add blank line

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Update access.go
This commit is contained in:
zeripath 2019-04-22 21:40:51 +01:00 committed by Lauris BH
parent b83114f140
commit be666b03ee
17 changed files with 418 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
docs/content/doc/advanced/logging-documentation.en-us.md
View file

@ -362,6 +362,17 @@ also set the `resetBytes` to the cached `resetBytes`.
The `colorBytes` and `resetBytes` are not exported to prevent
accidental overwriting of internal values.
## ColorFormat & ColorFormatted
Structs may implement the `log.ColorFormatted` interface by implementing the `ColorFormat(fmt.State)` function.
If a `log.ColorFormatted` struct is logged with `%-v` format, its `ColorFormat` will be used instead of the usual `%v`. The full `fmt.State` will be passed to allow implementers to look at additional flags.
In order to help implementers provide `ColorFormat` methods. There is a
`log.ColorFprintf(...)` function in the log module that will wrap values in `log.ColoredValue` and recognise `%-v`.
In general it is recommended not to make the results of this function too verbose to help increase its versatility. Usually this should simply be an `ID`:`Name`. If you wish to make a more verbose result, it is recommended to use `%-+v` as your marker.
## Log Spoofing protection
In order to protect the logs from being spoofed with cleverly

14
models/access.go
View file

@ -1,10 +1,15 @@
// 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 "fmt"
import (
"fmt"
"code.gitea.io/gitea/modules/log"
)
// AccessMode specifies the users access mode
type AccessMode int
@ -37,6 +42,13 @@ func (mode AccessMode) String() string {
}
}
// ColorFormat provides a ColorFormatted version of this AccessMode
func (mode AccessMode) ColorFormat(s fmt.State) {
log.ColorFprintf(s, "%d:%s",
log.NewColoredIDValue(mode),
mode)
}
// ParseAccessMode returns corresponding access mode to given permission string.
func ParseAccessMode(permission string) AccessMode {
switch permission {

10
models/org_team.go
View file

@ -34,6 +34,16 @@ type Team struct {
Units []*TeamUnit `xorm:"-"`
}
// ColorFormat provides a basic color format for a Team
func (t *Team) ColorFormat(s fmt.State) {
log.ColorFprintf(s, "%d:%s (OrgID: %d) %-v",
log.NewColoredIDValue(t.ID),
t.Name,
log.NewColoredIDValue(t.OrgID),
t.Authorize)
}
// GetUnits return a list of available units for a team
func (t *Team) GetUnits() error {
return t.getUnits(x)

19
models/repo.go
View file

@ -18,6 +18,7 @@ import (
"path/filepath"
"regexp"
"sort"
"strconv"
"strings"
"time"
@ -210,6 +211,24 @@ type Repository struct {
UpdatedUnix util.TimeStamp `xorm:"INDEX updated"`
}
// ColorFormat returns a colored string to represent this repo
func (repo *Repository) ColorFormat(s fmt.State) {
var ownerName interface{}
if repo.OwnerName != "" {
ownerName = repo.OwnerName
} else if repo.Owner != nil {
ownerName = repo.Owner.Name
} else {
ownerName = log.NewColoredIDValue(strconv.FormatInt(repo.OwnerID, 10))
}
log.ColorFprintf(s, "%d:%s/%s",
log.NewColoredIDValue(repo.ID),
ownerName,
repo.Name)
}
// AfterLoad is invoked from XORM after setting the values of all fields of this object.
func (repo *Repository) AfterLoad() {
// FIXME: use models migration to solve all at once.

61
models/repo_permission.go
View file

@ -4,6 +4,12 @@
package models
import (
"fmt"
"code.gitea.io/gitea/modules/log"
)
// Permission contains all the permissions related variables to a repository for a user
type Permission struct {
AccessMode AccessMode
@ -90,12 +96,67 @@ func (p *Permission) CanWriteIssuesOrPulls(isPull bool) bool {
return p.CanWrite(UnitTypeIssues)
}
// ColorFormat writes a colored string for these Permissions
func (p *Permission) ColorFormat(s fmt.State) {
noColor := log.ColorBytes(log.Reset)
format := "AccessMode: %-v, %d Units, %d UnitsMode(s): [ "
args := []interface{}{
p.AccessMode,
log.NewColoredValueBytes(len(p.Units), &noColor),
log.NewColoredValueBytes(len(p.UnitsMode), &noColor),
}
if s.Flag('+') {
for i, unit := range p.Units {
config := ""
if unit.Config != nil {
configBytes, err := unit.Config.ToDB()
config = string(configBytes)
if err != nil {
config = string(err.Error())
}
}
format += "\nUnits[%d]: ID: %d RepoID: %d Type: %-v Config: %s"
args = append(args,
log.NewColoredValueBytes(i, &noColor),
log.NewColoredIDValue(unit.ID),
log.NewColoredIDValue(unit.RepoID),
unit.Type,
config)
}
for key, value := range p.UnitsMode {
format += "\nUnitMode[%-v]: %-v"
args = append(args,
key,
value)
}
} else {
format += "..."
}
format += " ]"
log.ColorFprintf(s, format, args...)
}
// GetUserRepoPermission returns the user permissions to the repository
func GetUserRepoPermission(repo *Repository, user *User) (Permission, error) {
return getUserRepoPermission(x, repo, user)
}
func getUserRepoPermission(e Engine, repo *Repository, user *User) (perm Permission, err error) {
if log.IsTrace() {
defer func() {
if user == nil {
log.Trace("Permission Loaded for anonymous user in %-v:\nPermissions: %-+v",
repo,
perm)
return
}
log.Trace("Permission Loaded for %-v in %-v:\nPermissions: %-+v",
user,
repo,
perm)
}()
}
// anonymous user visit private repo.
// TODO: anonymous user visit public unit of private repo???
if user == nil && repo.IsPrivate {

30
models/unit.go
View file

@ -5,7 +5,10 @@
package models
import (
"fmt"
"strings"
"code.gitea.io/gitea/modules/log"
)
// UnitType is Unit's Type
@ -22,6 +25,33 @@ const (
UnitTypeExternalTracker // 7 ExternalTracker
)
func (u UnitType) String() string {
switch u {
case UnitTypeCode:
return "UnitTypeCode"
case UnitTypeIssues:
return "UnitTypeIssues"
case UnitTypePullRequests:
return "UnitTypePullRequests"
case UnitTypeReleases:
return "UnitTypeReleases"
case UnitTypeWiki:
return "UnitTypeWiki"
case UnitTypeExternalWiki:
return "UnitTypeExternalWiki"
case UnitTypeExternalTracker:
return "UnitTypeExternalTracker"
}
return fmt.Sprintf("Unknown UnitType %d", u)
}
// ColorFormat provides a ColorFormatted version of this UnitType
func (u UnitType) ColorFormat(s fmt.State) {
log.ColorFprintf(s, "%d:%s",
log.NewColoredIDValue(u),
u)
}
var (
// allRepUnitTypes contains all the unit types
allRepUnitTypes = []UnitType{

7
models/user.go
View file

@ -146,6 +146,13 @@ type User struct {
Theme string `xorm:"NOT NULL DEFAULT ''"`
}
// ColorFormat writes a colored string to identify this struct
func (u *User) ColorFormat(s fmt.State) {
log.ColorFprintf(s, "%d:%s",
log.NewColoredIDValue(u.ID),
log.NewColoredValue(u.Name))
}
// BeforeUpdate is invoked from XORM before updating this object.
func (u *User) BeforeUpdate() {
if u.MaxRepoCreation < -1 {

37
modules/context/permission.go
View file

@ -6,6 +6,8 @@ package context
import (
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/log"
macaron "gopkg.in/macaron.v1"
)
@ -45,6 +47,22 @@ func RequireRepoWriterOr(unitTypes ...models.UnitType) macaron.Handler {
func RequireRepoReader(unitType models.UnitType) macaron.Handler {
return func(ctx *Context) {
if !ctx.Repo.CanRead(unitType) {
if log.IsTrace() {
if ctx.IsSigned {
log.Trace("Permission Denied: User %-v cannot read %-v in Repo %-v\n"+
"User in Repo has Permissions: %-+v",
ctx.User,
unitType,
ctx.Repo.Repository,
ctx.Repo.Permission)
} else {
log.Trace("Permission Denied: Anonymous user cannot read %-v in Repo %-v\n"+
"Anonymous user in Repo has Permissions: %-+v",
unitType,
ctx.Repo.Repository,
ctx.Repo.Permission)
}
}
ctx.NotFound(ctx.Req.RequestURI, nil)
return
}
@ -59,6 +77,25 @@ func RequireRepoReaderOr(unitTypes ...models.UnitType) macaron.Handler {
return
}
}
if log.IsTrace() {
var format string
var args []interface{}
if ctx.IsSigned {
format = "Permission Denied: User %-v cannot read ["
args = append(args, ctx.User)
} else {
format = "Permission Denied: Anonymous user cannot read ["
}
for _, unit := range unitTypes {
format += "%-v, "
args = append(args, unit)
}
format = format[:len(format)-2] + "] in Repo %-v\n" +
"User in Repo has Permissions: %-+v"
args = append(args, ctx.Repo.Repository, ctx.Repo.Permission)
log.Trace(format, args...)
}
ctx.NotFound(ctx.Req.RequestURI, nil)
}
}

66
modules/log/colors.go
View file

@ -7,6 +7,7 @@ package log
import (
"fmt"
"io"
"reflect"
"strconv"
"strings"
)
@ -195,11 +196,12 @@ normalLoop:
lasti := i
if c.mode == escapeAll {
for i < end && (bytes[i] >= ' ' || bytes[i] == '\n') {
for i < end && (bytes[i] >= ' ' || bytes[i] == '\n' || bytes[i] == '\t') {
i++
}
} else {
for i < end && bytes[i] >= ' ' {
// Allow tabs if we're not escaping everything
for i < end && (bytes[i] >= ' ' || bytes[i] == '\t') {
i++
}
}
@ -266,6 +268,39 @@ normalLoop:
return totalWritten, nil
}
// ColorSprintf returns a colored string from a format and arguments
// arguments will be wrapped in ColoredValues to protect against color spoofing
func ColorSprintf(format string, args ...interface{}) string {
if len(args) > 0 {
v := make([]interface{}, len(args))
for i := 0; i < len(v); i++ {
v[i] = NewColoredValuePointer(&args[i])
}
return fmt.Sprintf(format, v...)
}
return fmt.Sprintf(format)
}
// ColorFprintf will write to the provided writer similar to ColorSprintf
func ColorFprintf(w io.Writer, format string, args ...interface{}) (int, error) {
if len(args) > 0 {
v := make([]interface{}, len(args))
for i := 0; i < len(v); i++ {
v[i] = NewColoredValuePointer(&args[i])
}
return fmt.Fprintf(w, format, v...)
}
return fmt.Fprintf(w, format)
}
// ColorFormatted structs provide their own colored string when formatted with ColorSprintf
type ColorFormatted interface {
// ColorFormat provides the colored representation of the value
ColorFormat(s fmt.State)
}
var colorFormattedType = reflect.TypeOf((*ColorFormatted)(nil)).Elem()
// ColoredValue will Color the provided value
type ColoredValue struct {
colorBytes *[]byte
@ -316,8 +351,33 @@ func NewColoredValueBytes(value interface{}, colorBytes *[]byte) *ColoredValue {
}
}
// Format will format the provided value and protect against ANSI spoofing within the value
// NewColoredIDValue is a helper function to create a ColoredValue from a Value
// The Value will be colored with FgCyan
// If a ColoredValue is provided it is not changed
func NewColoredIDValue(value interface{}) *ColoredValue {
return NewColoredValueBytes(&value, &fgCyanBytes)
}
// Format will format the provided value and protect against ANSI color spoofing within the value
// If the wrapped value is ColorFormatted and the format is "%-v" then its ColorString will
// be used. It is presumed that this ColorString is safe.
func (cv *ColoredValue) Format(s fmt.State, c rune) {
if c == 'v' && s.Flag('-') {
if val, ok := (*cv.Value).(ColorFormatted); ok {
val.ColorFormat(s)
return
}
v := reflect.ValueOf(*cv.Value)
t := v.Type()
if reflect.PtrTo(t).Implements(colorFormattedType) {
vp := reflect.New(t)
vp.Elem().Set(v)
val := vp.Interface().(ColorFormatted)
val.ColorFormat(s)
return
}
}
s.Write([]byte(*cv.colorBytes))
fmt.Fprintf(&protectedANSIWriter{w: s}, fmtString(s, c), *(cv.Value))
s.Write([]byte(*cv.resetBytes))

6
modules/log/logger.go
View file

@ -69,11 +69,7 @@ func (l *Logger) Log(skip int, level Level, format string, v ...interface{}) err
}
msg := format
if len(v) > 0 {
args := make([]interface{}, len(v))
for i := 0; i < len(args); i++ {
args[i] = NewColoredValuePointer(&v[i])
}
msg = fmt.Sprintf(format, args...)
msg = ColorSprintf(format, v...)
}
stack := ""
if l.GetStacktraceLevel() <= level {

50
routers/api/v1/api.go
View file

@ -369,6 +369,22 @@ func orgAssignment(args ...bool) macaron.Handler {
func mustEnableIssues(ctx *context.APIContext) {
if !ctx.Repo.CanRead(models.UnitTypeIssues) {
if log.IsTrace() {
if ctx.IsSigned {
log.Trace("Permission Denied: User %-v cannot read %-v in Repo %-v\n"+
"User in Repo has Permissions: %-+v",
ctx.User,
models.UnitTypeIssues,
ctx.Repo.Repository,
ctx.Repo.Permission)
} else {
log.Trace("Permission Denied: Anonymous user cannot read %-v in Repo %-v\n"+
"Anonymous user in Repo has Permissions: %-+v",
models.UnitTypeIssues,
ctx.Repo.Repository,
ctx.Repo.Permission)
}
}
ctx.NotFound()
return
}
@ -376,6 +392,22 @@ func mustEnableIssues(ctx *context.APIContext) {
func mustAllowPulls(ctx *context.APIContext) {
if !(ctx.Repo.Repository.CanEnablePulls() && ctx.Repo.CanRead(models.UnitTypePullRequests)) {
if ctx.Repo.Repository.CanEnablePulls() && log.IsTrace() {
if ctx.IsSigned {
log.Trace("Permission Denied: User %-v cannot read %-v in Repo %-v\n"+
"User in Repo has Permissions: %-+v",
ctx.User,
models.UnitTypePullRequests,
ctx.Repo.Repository,
ctx.Repo.Permission)
} else {
log.Trace("Permission Denied: Anonymous user cannot read %-v in Repo %-v\n"+
"Anonymous user in Repo has Permissions: %-+v",
models.UnitTypePullRequests,
ctx.Repo.Repository,
ctx.Repo.Permission)
}
}
ctx.NotFound()
return
}
@ -384,6 +416,24 @@ func mustAllowPulls(ctx *context.APIContext) {
func mustEnableIssuesOrPulls(ctx *context.APIContext) {
if !ctx.Repo.CanRead(models.UnitTypeIssues) &&
!(ctx.Repo.Repository.CanEnablePulls() && ctx.Repo.CanRead(models.UnitTypePullRequests)) {
if ctx.Repo.Repository.CanEnablePulls() && log.IsTrace() {
if ctx.IsSigned {
log.Trace("Permission Denied: User %-v cannot read %-v and %-v in Repo %-v\n"+
"User in Repo has Permissions: %-+v",
ctx.User,
models.UnitTypeIssues,
models.UnitTypePullRequests,
ctx.Repo.Repository,
ctx.Repo.Permission)
} else {
log.Trace("Permission Denied: Anonymous user cannot read %-v and %-v in Repo %-v\n"+
"Anonymous user in Repo has Permissions: %-+v",
models.UnitTypeIssues,
models.UnitTypePullRequests,
ctx.Repo.Repository,
ctx.Repo.Permission)
}
}
ctx.NotFound()
return
}

7
routers/api/v1/repo/pull.go
View file

@ -672,7 +672,12 @@ func parseCompareInfo(ctx *context.APIContext, form api.CreatePullRequestOption)
return nil, nil, nil, nil, "", ""
}
if !perm.CanReadIssuesOrPulls(true) {
log.Trace("ParseCompareInfo[%d]: cannot create/read pull requests", baseRepo.ID)
if log.IsTrace() {
log.Trace("Permission Denied: User %-v cannot create/read pull requests in Repo %-v\nUser in headRepo has Permissions: %-+v",
ctx.User,
headRepo,
perm)
}
ctx.NotFound()
return nil, nil, nil, nil, "", ""
}

54
routers/repo/issue.go
View file

@ -1163,6 +1163,24 @@ func NewComment(ctx *context.Context, form auth.CreateCommentForm) {
}
if !ctx.IsSigned || (ctx.User.ID != issue.PosterID && !ctx.Repo.CanReadIssuesOrPulls(issue.IsPull)) {
if log.IsTrace() {
if ctx.IsSigned {
issueType := "issues"
if issue.IsPull {
issueType = "pulls"
}
log.Trace("Permission Denied: User %-v not the Poster (ID: %d) and cannot read %s in Repo %-v.\n"+
"User in Repo has Permissions: %-+v",
ctx.User,
log.NewColoredIDValue(issue.PosterID),
issueType,
ctx.Repo.Repository,
ctx.Repo.Permission)
} else {
log.Trace("Permission Denied: Not logged in")
}
}
ctx.Error(403)
}
@ -1353,6 +1371,24 @@ func ChangeIssueReaction(ctx *context.Context, form auth.ReactionForm) {
}
if !ctx.IsSigned || (ctx.User.ID != issue.PosterID && !ctx.Repo.CanReadIssuesOrPulls(issue.IsPull)) {
if log.IsTrace() {
if ctx.IsSigned {
issueType := "issues"
if issue.IsPull {
issueType = "pulls"
}
log.Trace("Permission Denied: User %-v not the Poster (ID: %d) and cannot read %s in Repo %-v.\n"+
"User in Repo has Permissions: %-+v",
ctx.User,
log.NewColoredIDValue(issue.PosterID),
issueType,
ctx.Repo.Repository,
ctx.Repo.Permission)
} else {
log.Trace("Permission Denied: Not logged in")
}
}
ctx.Error(403)
return
}
@ -1432,6 +1468,24 @@ func ChangeCommentReaction(ctx *context.Context, form auth.ReactionForm) {
}
if !ctx.IsSigned || (ctx.User.ID != comment.PosterID && !ctx.Repo.CanReadIssuesOrPulls(comment.Issue.IsPull)) {
if log.IsTrace() {
if ctx.IsSigned {
issueType := "issues"
if comment.Issue.IsPull {
issueType = "pulls"
}
log.Trace("Permission Denied: User %-v not the Poster (ID: %d) and cannot read %s in Repo %-v.\n"+
"User in Repo has Permissions: %-+v",
ctx.User,
log.NewColoredIDValue(comment.Issue.PosterID),
issueType,
ctx.Repo.Repository,
ctx.Repo.Permission)
} else {
log.Trace("Permission Denied: Not logged in")
}
}
ctx.Error(403)
return
} else if comment.Type != models.CommentTypeComment && comment.Type != models.CommentTypeCode {

18
routers/repo/issue_watch.go
View file

@ -11,6 +11,7 @@ import (
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/log"
)
// IssueWatch sets issue watching
@ -21,6 +22,23 @@ func IssueWatch(ctx *context.Context) {
}
if !ctx.IsSigned || (ctx.User.ID != issue.PosterID && !ctx.Repo.CanReadIssuesOrPulls(issue.IsPull)) {
if log.IsTrace() {
if ctx.IsSigned {
issueType := "issues"
if issue.IsPull {
issueType = "pulls"
}
log.Trace("Permission Denied: User %-v not the Poster (ID: %d) and cannot read %s in Repo %-v.\n"+
"User in Repo has Permissions: %-+v",
ctx.User,
log.NewColoredIDValue(issue.PosterID),
issueType,
ctx.Repo.Repository,
ctx.Repo.Permission)
} else {
log.Trace("Permission Denied: Not logged in")
}
}
ctx.Error(403)
return
}

19
routers/repo/pull.go
View file

@ -64,6 +64,18 @@ func getForkRepository(ctx *context.Context) *models.Repository {
}
if forkRepo.IsEmpty || !perm.CanRead(models.UnitTypeCode) {
if log.IsTrace() {
if forkRepo.IsEmpty {
log.Trace("Empty fork repository %-v", forkRepo)
} else {
log.Trace("Permission Denied: User %-v cannot read %-v of forkRepo %-v\n"+
"User in forkRepo has Permissions: %-+v",
ctx.User,
models.UnitTypeCode,
ctx.Repo,
perm)
}
}
ctx.NotFound("getForkRepository", nil)
return nil
}
@ -704,7 +716,12 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
return nil, nil, nil, nil, "", ""
}
if !perm.CanReadIssuesOrPulls(true) {
log.Trace("ParseCompareInfo[%d]: cannot create/read pull requests", baseRepo.ID)
if log.IsTrace() {
log.Trace("Permission Denied: User: %-v cannot create/read pull requests in Repo: %-v\nUser in headRepo has Permissions: %-+v",
ctx.User,
headRepo,
perm)
}
ctx.NotFound("ParseCompareInfo", nil)
return nil, nil, nil, nil, "", ""
}

10
routers/repo/wiki.go
View file

@ -16,6 +16,7 @@ import (
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/markup/markdown"
"code.gitea.io/gitea/modules/util"
@ -32,6 +33,15 @@ const (
func MustEnableWiki(ctx *context.Context) {
if !ctx.Repo.CanRead(models.UnitTypeWiki) &&
!ctx.Repo.CanRead(models.UnitTypeExternalWiki) {
if log.IsTrace() {
log.Trace("Permission Denied: User %-v cannot read %-v or %-v of repo %-v\n"+
"User in repo has Permissions: %-+v",
ctx.User,
models.UnitTypeWiki,
models.UnitTypeExternalWiki,
ctx.Repo.Repository,
ctx.Repo.Permission)
}
ctx.NotFound("MustEnableWiki", nil)
return
}

9
routers/user/home.go
View file

@ -14,6 +14,7 @@ import (
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
@ -308,6 +309,14 @@ func Issues(ctx *context.Context) {
return
}
if !perm.CanRead(models.UnitTypeIssues) {
if log.IsTrace() {
log.Trace("Permission Denied: User %-v cannot read %-v of repo %-v\n"+
"User in repo has Permissions: %-+v",
ctxUser,
models.UnitTypeIssues,
repo,
perm)
}
ctx.Status(404)
return
}