forked from aleksandrpak/go-urlsign
/
verifier_parse.go
62 lines (47 loc) · 1.12 KB
/
verifier_parse.go
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package services
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
"golang.org/x/crypto/ssh"
)
func VerifierFromString(publicKey string) (*Verifier, error) {
return VerifierFromBytes([]byte(publicKey))
}
func VerifierFromBytes(publicKey []byte) (*Verifier, error) {
return parsePublicKey(publicKey)
}
func parsePublicKey(bytes []byte) (*Verifier, error) {
block, _ := pem.Decode(bytes)
if block == nil {
key, err := ssh.ParsePublicKey(bytes)
if err != nil {
return nil, errors.New("no key found")
}
return &Verifier{&sshPublicKey{key}}, nil
}
var rawkey interface{}
switch block.Type {
case "PUBLIC KEY":
rsa, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return nil, err
}
rawkey = rsa
default:
return nil, fmt.Errorf("unsupported key type %q", block.Type)
}
return newVerifierFromKey(rawkey)
}
func newVerifierFromKey(key interface{}) (*Verifier, error) {
var verifier Verifier
switch k := key.(type) {
case *rsa.PublicKey:
verifier = Verifier{&rsaPublicKey{k}}
default:
return nil, fmt.Errorf("unsupported key type %T", key)
}
return &verifier, nil
}