forked from lug/matterbridge
32 lines
708 B
Go
32 lines
708 B
Go
package cryptoutil
|
|
|
|
import (
|
|
"crypto/rand"
|
|
"crypto/rsa"
|
|
"crypto/sha1"
|
|
"crypto/x509"
|
|
"errors"
|
|
)
|
|
|
|
// Parses a DER encoded RSA public key
|
|
func ParseASN1RSAPublicKey(derBytes []byte) (*rsa.PublicKey, error) {
|
|
key, err := x509.ParsePKIXPublicKey(derBytes)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
pubKey, ok := key.(*rsa.PublicKey)
|
|
if !ok {
|
|
return nil, errors.New("not an RSA public key")
|
|
}
|
|
return pubKey, nil
|
|
}
|
|
|
|
// Encrypts a message with the given public key using RSA-OAEP and the sha1 hash function.
|
|
func RSAEncrypt(pub *rsa.PublicKey, msg []byte) []byte {
|
|
b, err := rsa.EncryptOAEP(sha1.New(), rand.Reader, pub, msg, nil)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return b
|
|
}
|