108 lines
2.5 KiB
Go
108 lines
2.5 KiB
Go
// cryptopasta - basic cryptography examples
|
|
//
|
|
// Written in 2015 by George Tankersley <george.tankersley@gmail.com>
|
|
//
|
|
// To the extent possible under law, the author(s) have dedicated all copyright
|
|
// and related and neighboring rights to this software to the public domain
|
|
// worldwide. This software is distributed without any warranty.
|
|
//
|
|
// You should have received a copy of the CC0 Public Domain Dedication along
|
|
// with this software. If not, see // <http://creativecommons.org/publicdomain/zero/1.0/>.
|
|
|
|
package cryptopasta
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/ecdsa"
|
|
"crypto/elliptic"
|
|
"crypto/rand"
|
|
"encoding/hex"
|
|
"testing"
|
|
)
|
|
|
|
// https://groups.google.com/d/msg/sci.crypt/OolWgsgQD-8/jHciyWkaL0gJ
|
|
var hmacTests = []struct {
|
|
key string
|
|
data string
|
|
digest string
|
|
}{
|
|
{
|
|
key: "0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b",
|
|
data: "4869205468657265", // "Hi There"
|
|
digest: "9f9126c3d9c3c330d760425ca8a217e31feae31bfe70196ff81642b868402eab",
|
|
},
|
|
{
|
|
key: "4a656665", // "Jefe"
|
|
data: "7768617420646f2079612077616e7420666f72206e6f7468696e673f", // "what do ya want for nothing?"
|
|
digest: "6df7b24630d5ccb2ee335407081a87188c221489768fa2020513b2d593359456",
|
|
},
|
|
}
|
|
|
|
func TestHMAC(t *testing.T) {
|
|
for idx, tt := range hmacTests {
|
|
keySlice, _ := hex.DecodeString(tt.key)
|
|
dataBytes, _ := hex.DecodeString(tt.data)
|
|
expectedDigest, _ := hex.DecodeString(tt.digest)
|
|
|
|
keyBytes := &[32]byte{}
|
|
copy(keyBytes[:], keySlice)
|
|
|
|
macDigest := GenerateHMAC(dataBytes, keyBytes)
|
|
if !bytes.Equal(macDigest, expectedDigest) {
|
|
t.Errorf("test %d generated unexpected mac", idx)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestSign(t *testing.T) {
|
|
message := []byte("Hello, world!")
|
|
|
|
key, err := NewSigningKey()
|
|
if err != nil {
|
|
t.Error(err)
|
|
return
|
|
}
|
|
|
|
signature, err := Sign(message, key)
|
|
if err != nil {
|
|
t.Error(err)
|
|
return
|
|
}
|
|
|
|
if !Verify(message, signature, &key.PublicKey) {
|
|
t.Error("signature was not correct")
|
|
return
|
|
}
|
|
|
|
message[0] ^= 0xff
|
|
if Verify(message, signature, &key.PublicKey) {
|
|
t.Error("signature was good for altered message")
|
|
}
|
|
}
|
|
|
|
func TestSignWithP384(t *testing.T) {
|
|
message := []byte("Hello, world!")
|
|
|
|
key, err := ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
|
|
if err != nil {
|
|
t.Error(err)
|
|
return
|
|
}
|
|
|
|
signature, err := Sign(message, key)
|
|
if err != nil {
|
|
t.Error(err)
|
|
return
|
|
}
|
|
|
|
if !Verify(message, signature, &key.PublicKey) {
|
|
t.Error("signature was not correct")
|
|
return
|
|
}
|
|
|
|
message[0] ^= 0xff
|
|
if Verify(message, signature, &key.PublicKey) {
|
|
t.Error("signature was good for altered message")
|
|
}
|
|
}
|