71 lines
1.7 KiB
Go
71 lines
1.7 KiB
Go
|
package crypto
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto/rsa"
|
||
|
|
"crypto/x509"
|
||
|
|
"encoding/pem"
|
||
|
|
"errors"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Errors specific to rsa_utils.
|
||
|
|
var (
|
||
|
|
ErrKeyMustBePEMEncoded = errors.New("invalid key: Key must be PEM encoded PKCS1 or PKCS8 private key")
|
||
|
|
ErrNotRSAPrivateKey = errors.New("key is not a valid RSA private key")
|
||
|
|
ErrNotRSAPublicKey = errors.New("key is not a valid RSA public key")
|
||
|
|
)
|
||
|
|
|
||
|
|
// ParseRSAPrivateKeyFromPEM parses a PEM encoded PKCS1 or PKCS8 private key.
|
||
|
|
func ParseRSAPrivateKeyFromPEM(key []byte) (*rsa.PrivateKey, error) {
|
||
|
|
var err error
|
||
|
|
|
||
|
|
// Parse PEM block
|
||
|
|
var block *pem.Block
|
||
|
|
if block, _ = pem.Decode(key); block == nil {
|
||
|
|
return nil, ErrKeyMustBePEMEncoded
|
||
|
|
}
|
||
|
|
|
||
|
|
var parsedKey interface{}
|
||
|
|
if parsedKey, err = x509.ParsePKCS1PrivateKey(block.Bytes); err != nil {
|
||
|
|
if parsedKey, err = x509.ParsePKCS8PrivateKey(block.Bytes); err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var pkey *rsa.PrivateKey
|
||
|
|
var ok bool
|
||
|
|
if pkey, ok = parsedKey.(*rsa.PrivateKey); !ok {
|
||
|
|
return nil, ErrNotRSAPrivateKey
|
||
|
|
}
|
||
|
|
|
||
|
|
return pkey, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// ParseRSAPublicKeyFromPEM parses PEM encoded PKCS1 or PKCS8 public key.
|
||
|
|
func ParseRSAPublicKeyFromPEM(key []byte) (*rsa.PublicKey, error) {
|
||
|
|
var err error
|
||
|
|
|
||
|
|
// Parse PEM block
|
||
|
|
var block *pem.Block
|
||
|
|
if block, _ = pem.Decode(key); block == nil {
|
||
|
|
return nil, ErrKeyMustBePEMEncoded
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse the key
|
||
|
|
var parsedKey interface{}
|
||
|
|
if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
|
||
|
|
if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
|
||
|
|
parsedKey = cert.PublicKey
|
||
|
|
} else {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var pkey *rsa.PublicKey
|
||
|
|
var ok bool
|
||
|
|
if pkey, ok = parsedKey.(*rsa.PublicKey); !ok {
|
||
|
|
return nil, ErrNotRSAPublicKey
|
||
|
|
}
|
||
|
|
|
||
|
|
return pkey, nil
|
||
|
|
}
|