blob: 78cd954a41ee64375f3dc5fa1fa57edb8ccc1880 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
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
}
|
