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Retry SSH key verification with additional CRLF if it failed (#28392) 

Windows-based shells will add a CRLF when piping the token into
ssh-keygen command resulting in
verification error. This resolves #21527.

---------

Co-authored-by: Heiko Besemann <heiko.besemann@qbeyond.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
nekrondev 2023-12-14 03:39:32 +01:00 committed by GitHub
parent cbf923e87b
commit 52046b934d
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 4 deletions
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13
models/asymkey/ssh_key_verify.go
View File

@ -30,10 +30,15 @@ func VerifySSHKey(ctx context.Context, ownerID int64, fingerprint, token, signat
return "", ErrKeyNotExist{}
}
if err := sshsig.Verify(bytes.NewBuffer([]byte(token)), []byte(signature), []byte(key.Content), "gitea"); err != nil {
log.Error("Unable to validate token signature. Error: %v", err)
return "", ErrSSHInvalidTokenSignature{
Fingerprint: key.Fingerprint,
err = sshsig.Verify(bytes.NewBuffer([]byte(token)), []byte(signature), []byte(key.Content), "gitea")
if err != nil {
// edge case for Windows based shells that will add CR LF if piped to ssh-keygen command
// see https://github.com/PowerShell/PowerShell/issues/5974
if sshsig.Verify(bytes.NewBuffer([]byte(token+"\r\n")), []byte(signature), []byte(key.Content), "gitea") != nil {
log.Error("Unable to validate token signature. Error: %v", err)
return "", ErrSSHInvalidTokenSignature{
Fingerprint: key.Fingerprint,
}
}
}