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package pemutil
import (
"crypto"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/x509"
"encoding/json"
"encoding/pem"
"errors"
"math/big"
"os"
"reflect"
"testing"
"golang.org/x/crypto/nacl/secretbox"
"golang.org/x/crypto/scrypt"
)
func TestParseCosignPrivateKey(t *testing.T) {
b, err := os.ReadFile("testdata/cosign.enc.pem")
if err != nil {
t.Fatal(err)
}
block, _ := pem.Decode(b)
if block == nil {
t.Fatal("error decoding testdata/cosign.enc.pem")
}
var env cosignEnvelope
if err := json.Unmarshal(block.Bytes, &env); err != nil {
t.Fatal(err)
}
marshalEnv := func(in cosignEnvelope) []byte {
b, err := json.Marshal(in)
if err != nil {
t.Fatal(err)
}
return b
}
want := &ecdsa.PrivateKey{
PublicKey: ecdsa.PublicKey{
Curve: elliptic.P256(),
X: big.NewInt(0).SetBytes([]byte{
0xdb, 0xa8, 0x69, 0x99, 0xc1, 0xda, 0xd8, 0x26,
0x1a, 0xcf, 0xb9, 0x60, 0x4d, 0x62, 0x8b, 0x04,
0xd9, 0x52, 0xbf, 0x61, 0x32, 0x3f, 0x14, 0xa2,
0x2c, 0x61, 0xbc, 0xcb, 0xd5, 0xe4, 0xd9, 0x63,
}),
Y: big.NewInt(0).SetBytes([]byte{
0x97, 0xab, 0x65, 0xa5, 0xd6, 0x76, 0x8f, 0xbe,
0xb5, 0xb9, 0xe5, 0x9d, 0x5f, 0x93, 0xe5, 0xde,
0x07, 0x58, 0x5e, 0xa6, 0x3a, 0x32, 0x26, 0x71,
0xba, 0x06, 0x3f, 0x0c, 0xd6, 0x5e, 0x97, 0x2a,
}),
},
D: big.NewInt(0).SetBytes([]byte{
0x4c, 0x96, 0x4f, 0x6b, 0x65, 0x3b, 0x61, 0x1e,
0xe1, 0x84, 0x4b, 0xa2, 0xf7, 0x5a, 0x59, 0xf2,
0xab, 0x56, 0xf5, 0xdb, 0x6a, 0x96, 0x54, 0x6f,
0xf0, 0xd7, 0x51, 0x99, 0x0f, 0x0b, 0xa5, 0x38,
}),
}
type args struct {
data []byte
password []byte
}
tests := []struct {
name string
args args
want crypto.PrivateKey
wantErr bool
}{
{"ok", args{block.Bytes, []byte("mypassword")}, want, false},
{"fail password", args{block.Bytes, []byte("password")}, nil, true},
{"fail unmarshal", args{block.Bytes[1:], []byte("mypassword")}, nil, true},
{"fail kdf", args{func() []byte {
key := env
key.KDF.Name = "bcrypt"
return marshalEnv(key)
}(), []byte("mypassword")}, nil, true},
{"fail cipher", args{func() []byte {
key := env
key.Cipher.Name = "nacl/box"
return marshalEnv(key)
}(), []byte("mypassword")}, nil, true},
{"fail nonce too large", args{func() []byte {
key := env
key.Cipher.Nonce = append(key.Cipher.Nonce, '0')
return marshalEnv(key)
}(), []byte("mypassword")}, nil, true},
{"fail nonce too short", args{func() []byte {
key := env
key.Cipher.Nonce = key.Cipher.Nonce[:23]
return marshalEnv(key)
}(), []byte("mypassword")}, nil, true},
{"fail kdf.N", args{func() []byte {
key := env
key.KDF.Params.N++
return marshalEnv(key)
}(), []byte("mypassword")}, nil, true},
{"fail kdf.R", args{func() []byte {
key := env
key.KDF.Params.R++
return marshalEnv(key)
}(), []byte("mypassword")}, nil, true},
{"fail kdf.P", args{func() []byte {
key := env
key.KDF.Params.P++
return marshalEnv(key)
}(), []byte("mypassword")}, nil, true},
{"fail kdf.Salt", args{func() []byte {
key := env
key.KDF.Salt[10]++
return marshalEnv(key)
}(), []byte("mypassword")}, nil, true},
{"fail ciphertext", args{func() []byte {
key := env
key.Ciphertext[10]++
return marshalEnv(key)
}(), []byte("mypassword")}, nil, true},
{"fail parsePKCS8PrivateKey", args{func() []byte {
var n [24]byte
var k [32]byte
key := env
b, err := scrypt.Key([]byte("mypassword"), key.KDF.Salt,
key.KDF.Params.N, key.KDF.Params.R, key.KDF.Params.P, 32)
if err != nil {
t.Fatal(err)
}
copy(n[:], key.Cipher.Nonce)
copy(k[:], b)
key.Ciphertext = secretbox.Seal(nil, []byte("not a key"), &n, &k)
return marshalEnv(key)
}(), []byte("mypassword")}, nil, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := ParseCosignPrivateKey(tt.args.data, tt.args.password)
if (err != nil) != tt.wantErr {
t.Errorf("ParseCosignPrivateKey() error = %v, wantErr %v", err, tt.wantErr)
return
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("ParseCosignPrivateKey() = %v, want %v", got, tt.want)
}
})
}
}
func TestParseCosignPrivateKey_equal(t *testing.T) {
parsePem := func(fn string) []byte {
b, err := os.ReadFile(fn)
if err != nil {
t.Fatal(err)
}
block, _ := pem.Decode(b)
if block == nil {
t.Fatalf("error decoding %s", fn)
}
return block.Bytes
}
key, err := ParseCosignPrivateKey(parsePem("testdata/cosign.enc.pem"), []byte("mypassword"))
if err != nil {
t.Errorf("ParseCosignPrivateKey() error = %v", err)
return
}
priv, err := x509.ParsePKCS8PrivateKey(parsePem("testdata/cosign.pem"))
if err != nil {
t.Errorf("ParsePKCS8PrivateKey() error = %v", err)
return
}
if !reflect.DeepEqual(priv, key) {
t.Errorf("Private keys do not match() = %v, want %v", priv, key)
}
pub, err := x509.ParsePKIXPublicKey(parsePem("testdata/cosign.pub.pem"))
if err != nil {
t.Errorf("ParsePKIXPublicKey() error = %v", err)
return
}
if !reflect.DeepEqual(pub, key.(crypto.Signer).Public()) {
t.Errorf("Public keys do not match() = %v, want %v", pub, key.(crypto.Signer).Public())
}
}
func TestParseCosignPrivateKey_IncorrectPasswordError(t *testing.T) {
b, err := os.ReadFile("testdata/cosign.enc.pem")
if err != nil {
t.Fatal(err)
}
block, _ := pem.Decode(b)
if block == nil {
t.Fatal("error decoding testdata/cosign.enc.pem")
}
_, err = ParseCosignPrivateKey(block.Bytes, []byte("mypassword"))
if err != nil {
t.Errorf("ParseCosignPrivateKey() error = %v", err)
}
_, err = ParseCosignPrivateKey(block.Bytes, []byte("foobar"))
if !errors.Is(err, x509.IncorrectPasswordError) {
t.Errorf("ParseCosignPrivateKey() error = %v, wantErr = %v", err, x509.IncorrectPasswordError)
}
}
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