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
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package util
import (
"crypto"
"crypto/rand"
"crypto/rsa"
"crypto/sha256"
"crypto/x509"
"encoding/pem"
)
// GenerateKeyPair generates a public and private keypair
func GenerateKeyPair(bits int) (string, string, error) {
priv, _ := rsa.GenerateKey(rand.Reader, bits)
privPem := pemBlockForPriv(priv)
pubPem, err := pemBlockForPub(&priv.PublicKey)
if err != nil {
return "", "", err
}
return privPem, pubPem, nil
}
func pemBlockForPriv(priv *rsa.PrivateKey) string {
privBytes := pem.EncodeToMemory(&pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: x509.MarshalPKCS1PrivateKey(priv),
})
return string(privBytes)
}
func pemBlockForPub(pub *rsa.PublicKey) (string, error) {
pubASN1, err := x509.MarshalPKIXPublicKey(pub)
if err != nil {
return "", err
}
pubBytes := pem.EncodeToMemory(&pem.Block{
Type: "PUBLIC KEY",
Bytes: pubASN1,
})
return string(pubBytes), nil
}
// CreatePublicKeyFingerprint creates a fingerprint of the given key.
// The fingerprint is the sha256 sum of the PKIX structure of the key.
func CreatePublicKeyFingerprint(key crypto.PublicKey) ([]byte, error) {
bytes, err := x509.MarshalPKIXPublicKey(key)
if err != nil {
return nil, err
}
checksum := sha256.Sum256(bytes)
return checksum[:], nil
}
|
