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Merge pull request 'fix: ensure correct ssh public key is used for authentication' (#6248) from earl-warren/forgejo:wip-ssh into forgejo

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Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/6248
This commit is contained in:
Earl Warren 2024-12-12 05:57:17 +00:00
commit a6d4505d76
3 changed files with 13 additions and 10 deletions
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2
go.mod
View file

@ -301,3 +301,5 @@ replace github.com/nektos/act => code.forgejo.org/forgejo/act v1.22.0
replace github.com/mholt/archiver/v3 => code.forgejo.org/forgejo/archiver/v3 v3.5.1 replace github.com/mholt/archiver/v3 => code.forgejo.org/forgejo/archiver/v3 v3.5.1
replace github.com/goccy/go-json => github.com/grafana/go-json v0.0.0-20241210211703-a119ee5a0a3b replace github.com/goccy/go-json => github.com/grafana/go-json v0.0.0-20241210211703-a119ee5a0a3b
replace github.com/gliderlabs/ssh => code.forgejo.org/forgejo/ssh v0.0.0-20241211213324-5fc306ca0616

4
go.sum
View file

@ -10,6 +10,8 @@ code.forgejo.org/forgejo/archiver/v3 v3.5.1 h1:UmmbA7D5550uf71SQjarmrn6yKwOGxtEj
code.forgejo.org/forgejo/archiver/v3 v3.5.1/go.mod h1:e3dqJ7H78uzsRSEACH1joayhuSyhnonssnDhppzS1L4= code.forgejo.org/forgejo/archiver/v3 v3.5.1/go.mod h1:e3dqJ7H78uzsRSEACH1joayhuSyhnonssnDhppzS1L4=
code.forgejo.org/forgejo/reply v1.0.2 h1:dMhQCHV6/O3L5CLWNTol+dNzDAuyCK88z4J/lCdgFuQ= code.forgejo.org/forgejo/reply v1.0.2 h1:dMhQCHV6/O3L5CLWNTol+dNzDAuyCK88z4J/lCdgFuQ=
code.forgejo.org/forgejo/reply v1.0.2/go.mod h1:RyZUfzQLc+fuLIGjTSQWDAJWPiL4WtKXB/FifT5fM7U= code.forgejo.org/forgejo/reply v1.0.2/go.mod h1:RyZUfzQLc+fuLIGjTSQWDAJWPiL4WtKXB/FifT5fM7U=
code.forgejo.org/forgejo/ssh v0.0.0-20241211213324-5fc306ca0616 h1:kEZL84+02jY9RxXM4zHBWZ3Fml0B09cmP1LGkDsCfIA=
code.forgejo.org/forgejo/ssh v0.0.0-20241211213324-5fc306ca0616/go.mod h1:zpHEXBstFnQYtGnB8k8kQLol82umzn/2/snG7alWVD8=
code.forgejo.org/go-chi/binding v1.0.0 h1:EIDJtk9brK7WsT7rvS/D4cxX8XlnhY3LMy8ex1jeHu0= code.forgejo.org/go-chi/binding v1.0.0 h1:EIDJtk9brK7WsT7rvS/D4cxX8XlnhY3LMy8ex1jeHu0=
code.forgejo.org/go-chi/binding v1.0.0/go.mod h1:fWwqaHj0H1/KeCpBqdvKunflq8pYfciEHI5v3UUeE2E= code.forgejo.org/go-chi/binding v1.0.0/go.mod h1:fWwqaHj0H1/KeCpBqdvKunflq8pYfciEHI5v3UUeE2E=
code.forgejo.org/go-chi/cache v1.0.0 h1:akLfGxNlHcacmtutovNtYFSTMsbdcp5MGjAEsP4pxnE= code.forgejo.org/go-chi/cache v1.0.0 h1:akLfGxNlHcacmtutovNtYFSTMsbdcp5MGjAEsP4pxnE=
@ -225,8 +227,6 @@ github.com/fsnotify/fsnotify v1.8.0 h1:dAwr6QBTBZIkG8roQaJjGof0pp0EeF+tNV7YBP3F/
github.com/fsnotify/fsnotify v1.8.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0= github.com/fsnotify/fsnotify v1.8.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
github.com/fxamacker/cbor/v2 v2.7.0 h1:iM5WgngdRBanHcxugY4JySA0nk1wZorNOpTgCMedv5E= github.com/fxamacker/cbor/v2 v2.7.0 h1:iM5WgngdRBanHcxugY4JySA0nk1wZorNOpTgCMedv5E=
github.com/fxamacker/cbor/v2 v2.7.0/go.mod h1:pxXPTn3joSm21Gbwsv0w9OSA2y1HFR9qXEeXQVeNoDQ= github.com/fxamacker/cbor/v2 v2.7.0/go.mod h1:pxXPTn3joSm21Gbwsv0w9OSA2y1HFR9qXEeXQVeNoDQ=
github.com/gliderlabs/ssh v0.3.7 h1:iV3Bqi942d9huXnzEF2Mt+CY9gLu8DNM4Obd+8bODRE=
github.com/gliderlabs/ssh v0.3.7/go.mod h1:zpHEXBstFnQYtGnB8k8kQLol82umzn/2/snG7alWVD8=
github.com/go-ap/activitypub v0.0.0-20231114162308-e219254dc5c9 h1:j2TrkUG/NATGi/EQS+MvEoF79CxiRUmT16ErFroNcKI= github.com/go-ap/activitypub v0.0.0-20231114162308-e219254dc5c9 h1:j2TrkUG/NATGi/EQS+MvEoF79CxiRUmT16ErFroNcKI=
github.com/go-ap/activitypub v0.0.0-20231114162308-e219254dc5c9/go.mod h1:cJ9Ye0ZNSMN7RzZDBRY3E+8M3Bpf/R1JX22Ir9yX6WI= github.com/go-ap/activitypub v0.0.0-20231114162308-e219254dc5c9/go.mod h1:cJ9Ye0ZNSMN7RzZDBRY3E+8M3Bpf/R1JX22Ir9yX6WI=
github.com/go-ap/errors v0.0.0-20231003111023-183eef4b31b7 h1:I2nuhyVI/48VXoRCCZR2hYBgnSXa+EuDJf/VyX06TC0= github.com/go-ap/errors v0.0.0-20231003111023-183eef4b31b7 h1:I2nuhyVI/48VXoRCCZR2hYBgnSXa+EuDJf/VyX06TC0=

17
modules/ssh/ssh.go
View file

@ -11,7 +11,6 @@ import (
"crypto/x509" "crypto/x509"
"encoding/pem" "encoding/pem"
"errors" "errors"
"fmt"
"io" "io"
"net" "net"
"os" "os"
@ -33,10 +32,6 @@ import (
gossh "golang.org/x/crypto/ssh" gossh "golang.org/x/crypto/ssh"
) )
type contextKey string
const giteaKeyID = contextKey("gitea-key-id")
func getExitStatusFromError(err error) int { func getExitStatusFromError(err error) int {
if err == nil { if err == nil {
return 0 return 0
@ -62,7 +57,7 @@ func getExitStatusFromError(err error) int {
} }
func sessionHandler(session ssh.Session) { func sessionHandler(session ssh.Session) {
keyID := fmt.Sprintf("%d", session.Context().Value(giteaKeyID).(int64)) keyID := session.ConnPermissions().Extensions["forgejo-key-id"]
command := session.RawCommand() command := session.RawCommand()
@ -238,7 +233,10 @@ func publicKeyHandler(ctx ssh.Context, key ssh.PublicKey) bool {
if log.IsDebug() { // <- FingerprintSHA256 is kinda expensive so only calculate it if necessary if log.IsDebug() { // <- FingerprintSHA256 is kinda expensive so only calculate it if necessary
log.Debug("Successfully authenticated: %s Certificate Fingerprint: %s Principal: %s", ctx.RemoteAddr(), gossh.FingerprintSHA256(key), principal) log.Debug("Successfully authenticated: %s Certificate Fingerprint: %s Principal: %s", ctx.RemoteAddr(), gossh.FingerprintSHA256(key), principal)
} }
ctx.SetValue(giteaKeyID, pkey.ID) if ctx.Permissions().Extensions == nil {
ctx.Permissions().Extensions = map[string]string{}
}
ctx.Permissions().Extensions["forgejo-key-id"] = strconv.FormatInt(pkey.ID, 10)
return true return true
} }
@ -266,7 +264,10 @@ func publicKeyHandler(ctx ssh.Context, key ssh.PublicKey) bool {
if log.IsDebug() { // <- FingerprintSHA256 is kinda expensive so only calculate it if necessary if log.IsDebug() { // <- FingerprintSHA256 is kinda expensive so only calculate it if necessary
log.Debug("Successfully authenticated: %s Public Key Fingerprint: %s", ctx.RemoteAddr(), gossh.FingerprintSHA256(key)) log.Debug("Successfully authenticated: %s Public Key Fingerprint: %s", ctx.RemoteAddr(), gossh.FingerprintSHA256(key))
} }
ctx.SetValue(giteaKeyID, pkey.ID) if ctx.Permissions().Extensions == nil {
ctx.Permissions().Extensions = map[string]string{}
}
ctx.Permissions().Extensions["forgejo-key-id"] = strconv.FormatInt(pkey.ID, 10)
return true return true
} }