--- /dev/null
+// GoGOST -- Pure Go GOST cryptographic functions library
+// Copyright (C) 2015-2019 Sergey Matveev <stargrave@stargrave.org>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 3 of the License.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+package mgm
+
+import (
+ "bytes"
+ "crypto/cipher"
+ "crypto/rand"
+ "testing"
+ "testing/quick"
+
+ "go.cypherpunks.ru/gogost/v4/gost3412128"
+ "go.cypherpunks.ru/gogost/v4/gost341264"
+)
+
+func TestVector(t *testing.T) {
+ key := []byte{
+ 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
+ 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
+ 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10,
+ 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF,
+ }
+ additionalData := []byte{
+ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
+ 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
+ 0xEA, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+ 0x05,
+ }
+ plaintext := []byte{
+ 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x00,
+ 0xFF, 0xEE, 0xDD, 0xCC, 0xBB, 0xAA, 0x99, 0x88,
+ 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
+ 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xEE, 0xFF, 0x0A,
+ 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88,
+ 0x99, 0xAA, 0xBB, 0xCC, 0xEE, 0xFF, 0x0A, 0x00,
+ 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99,
+ 0xAA, 0xBB, 0xCC, 0xEE, 0xFF, 0x0A, 0x00, 0x11,
+ 0xAA, 0xBB, 0xCC,
+ }
+ c := gost3412128.NewCipher(key)
+ nonce := plaintext[:16]
+ aead, _ := NewMGM(c, 16)
+ sealed := aead.Seal(nil, nonce, plaintext, additionalData)
+ if bytes.Compare(sealed[:len(plaintext)], []byte{
+ 0xA9, 0x75, 0x7B, 0x81, 0x47, 0x95, 0x6E, 0x90,
+ 0x55, 0xB8, 0xA3, 0x3D, 0xE8, 0x9F, 0x42, 0xFC,
+ 0x80, 0x75, 0xD2, 0x21, 0x2B, 0xF9, 0xFD, 0x5B,
+ 0xD3, 0xF7, 0x06, 0x9A, 0xAD, 0xC1, 0x6B, 0x39,
+ 0x49, 0x7A, 0xB1, 0x59, 0x15, 0xA6, 0xBA, 0x85,
+ 0x93, 0x6B, 0x5D, 0x0E, 0xA9, 0xF6, 0x85, 0x1C,
+ 0xC6, 0x0C, 0x14, 0xD4, 0xD3, 0xF8, 0x83, 0xD0,
+ 0xAB, 0x94, 0x42, 0x06, 0x95, 0xC7, 0x6D, 0xEB,
+ 0x2C, 0x75, 0x52,
+ }) != 0 {
+ t.FailNow()
+ }
+ if bytes.Compare(sealed[len(plaintext):], []byte{
+ 0xCF, 0x5D, 0x65, 0x6F, 0x40, 0xC3, 0x4F, 0x5C,
+ 0x46, 0xE8, 0xBB, 0x0E, 0x29, 0xFC, 0xDB, 0x4C,
+ }) != 0 {
+ t.FailNow()
+ }
+ _, err := aead.Open(sealed[:0], nonce, sealed, additionalData)
+ if err != nil {
+ t.FailNow()
+ }
+ if bytes.Compare(sealed[:len(plaintext)], plaintext) != 0 {
+ t.FailNow()
+ }
+}
+
+func TestSymmetric(t *testing.T) {
+ sym := func(keySize, blockSize int, c cipher.Block, nonce []byte) {
+ f := func(
+ plaintext, additionalData []byte,
+ initials [][]byte,
+ tagSize uint8,
+ ) bool {
+ if len(plaintext) == 0 && len(additionalData) == 0 {
+ return true
+ }
+ tagSize = 4 + tagSize%uint8(blockSize-4)
+ aead, err := NewMGM(c, int(tagSize))
+ if err != nil {
+ return false
+ }
+ for _, initial := range initials {
+ sealed := aead.Seal(initial, nonce, plaintext, additionalData)
+ if bytes.Compare(sealed[:len(initial)], initial) != 0 {
+ return false
+ }
+ pt, err := aead.Open(
+ sealed[:0],
+ nonce,
+ sealed[len(initial):],
+ additionalData,
+ )
+ if err != nil || bytes.Compare(pt, plaintext) != 0 {
+ return false
+ }
+ }
+ return true
+ }
+ if err := quick.Check(f, nil); err != nil {
+ t.Error(err)
+ }
+ }
+
+ key128 := new([gost3412128.KeySize]byte)
+ if _, err := rand.Read(key128[:]); err != nil {
+ panic(err)
+ }
+ nonce := make([]byte, gost3412128.BlockSize)
+ if _, err := rand.Read(key128[1:]); err != nil {
+ panic(err)
+ }
+ sym(
+ gost3412128.KeySize,
+ gost3412128.BlockSize,
+ gost3412128.NewCipher(key128[:]),
+ nonce[:gost3412128.BlockSize],
+ )
+
+ key64 := new([gost341264.KeySize]byte)
+ copy(key64[:], key128[:])
+ sym(
+ gost341264.KeySize,
+ gost341264.BlockSize,
+ gost341264.NewCipher(key64[:]),
+ nonce[:gost341264.BlockSize],
+ )
+}