I'm using this method to extract and get the public key string from an
original ssh private key. They key ends up to be broken/badly formatted.
I've checked it against the key generated by ssh-keygen and the first few
chars are different. Anyone has any ideas?
func ExtractPublicKey(der []byte) (*string, error) {
var privateKey crypto.PrivateKey
var publicKey crypto.PublicKey
var ok bool = true
var err error
privateKey, err = ssh.ParseRawPrivateKey([]byte(der))
if err != nil {
return nil, err
}
switch privateKey.(type) {
case *rsa.PrivateKey:
fmt.Println("*rsa.PrivateKey")
key := privateKey.(*rsa.PrivateKey)
publicKey = key.PublicKey
case *ecdsa.PrivateKey:
fmt.Println("*ecdsa.PrivateKey")
key := privateKey.(*ecdsa.PrivateKey)
publicKey = key.Public()
case *dsa.PrivateKey:
fmt.Println("*dsa.PrivateKey")
key := privateKey.(*dsa.PrivateKey)
publicKey = key.PublicKey
case *ed25519.PrivateKey:
fmt.Println("*ed25519.PrivateKey")
key := privateKey.(*ed25519.PrivateKey)
publicKey = key.Public()
default:
return nil, errors.New("Failed to defined key type")
}
if !ok {
return nil, fmt.Errorf("Failed to convert key to %s",
"rsa.PrivateKey")
}
fmt.Println(string(ssh.Marshal(publicKey)))
str := base64.StdEncoding.EncodeToString(ssh.Marshal(publicKey))
return &str, nil
}
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