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don't check minimum key size when disabled (#1754)

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* cleanup old comments for ed25519

These comments were added when x/crypto/ed25519 could not yet handle
ed25519. It does now, so it should be removed.
Also the key type is now replaced with the proper constant.

* move the minimum key size config before the check

This moves the actual config lookup before any check is done. This
avoids problems with calling to ssh-keygen which doesn't support the
expected output format and returning an error, when the check is disabled.
This commit is contained in:
Gibheer 2017-10-26 03:49:41 +02:00 committed by Lunny Xiao
parent eca05b09aa
commit bc84110989
1 changed files with 5 additions and 5 deletions
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10
models/ssh_key.go
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@ -202,7 +202,6 @@ func SSHKeyGenParsePublicKey(key string) (string, int, error) {
}
// SSHNativeParsePublicKey extracts the key type and length using the golang SSH library.
// NOTE: ed25519 is not supported.
func SSHNativeParsePublicKey(keyLine string) (string, int, error) {
fields := strings.Fields(keyLine)
if len(fields) < 2 {
@ -251,7 +250,7 @@ func SSHNativeParsePublicKey(keyLine string) (string, int, error) {
return "ecdsa", 384, nil
case ssh.KeyAlgoECDSA521:
return "ecdsa", 521, nil
case "ssh-ed25519": // TODO: replace with ssh constant when available
case ssh.KeyAlgoED25519:
return "ed25519", 256, nil
}
return "", 0, fmt.Errorf("unsupported key length detection for type: %s", pkey.Type())
@ -277,6 +276,10 @@ func CheckPublicKeyString(content string) (_ string, err error) {
// remove any unnecessary whitespace now
content = strings.TrimSpace(content)
if !setting.SSH.MinimumKeySizeCheck {
return content, nil
}
var (
fnName string
keyType string
@ -294,9 +297,6 @@ func CheckPublicKeyString(content string) (_ string, err error) {
}
log.Trace("Key info [native: %v]: %s-%d", setting.SSH.StartBuiltinServer, keyType, length)
if !setting.SSH.MinimumKeySizeCheck {
return content, nil
}
if minLen, found := setting.SSH.MinimumKeySizes[keyType]; found && length >= minLen {
return content, nil
} else if found && length < minLen {