mgm/mode_test.go

   1 // GoGOST -- Pure Go GOST cryptographic functions library
   2 // Copyright (C) 2015-2021 Sergey Matveev <stargrave@stargrave.org>
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, version 3 of the License.
   7 //
   8 // This program is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 // GNU General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU General Public License
  14 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 package mgm
  17
  18 import (
  19         "bytes"
  20         "crypto/cipher"
  21         "crypto/rand"
  22         "testing"
  23         "testing/quick"
  24
  25         "go.cypherpunks.ru/gogost/v5/gost3412128"
  26         "go.cypherpunks.ru/gogost/v5/gost341264"
  27 )
  28
  29 func TestVector(t *testing.T) {
  30         key := []byte{
  31                 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
  32                 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
  33                 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10,
  34                 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF,
  35         }
  36         additionalData := []byte{
  37                 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
  38                 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
  39                 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
  40                 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
  41                 0xEA, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
  42                 0x05,
  43         }
  44         plaintext := []byte{
  45                 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x00,
  46                 0xFF, 0xEE, 0xDD, 0xCC, 0xBB, 0xAA, 0x99, 0x88,
  47                 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
  48                 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xEE, 0xFF, 0x0A,
  49                 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88,
  50                 0x99, 0xAA, 0xBB, 0xCC, 0xEE, 0xFF, 0x0A, 0x00,
  51                 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99,
  52                 0xAA, 0xBB, 0xCC, 0xEE, 0xFF, 0x0A, 0x00, 0x11,
  53                 0xAA, 0xBB, 0xCC,
  54         }
  55         c := gost3412128.NewCipher(key)
  56         nonce := plaintext[:16]
  57         aead, _ := NewMGM(c, 16)
  58         sealed := aead.Seal(nil, nonce, plaintext, additionalData)
  59         if bytes.Compare(sealed[:len(plaintext)], []byte{
  60                 0xA9, 0x75, 0x7B, 0x81, 0x47, 0x95, 0x6E, 0x90,
  61                 0x55, 0xB8, 0xA3, 0x3D, 0xE8, 0x9F, 0x42, 0xFC,
  62                 0x80, 0x75, 0xD2, 0x21, 0x2B, 0xF9, 0xFD, 0x5B,
  63                 0xD3, 0xF7, 0x06, 0x9A, 0xAD, 0xC1, 0x6B, 0x39,
  64                 0x49, 0x7A, 0xB1, 0x59, 0x15, 0xA6, 0xBA, 0x85,
  65                 0x93, 0x6B, 0x5D, 0x0E, 0xA9, 0xF6, 0x85, 0x1C,
  66                 0xC6, 0x0C, 0x14, 0xD4, 0xD3, 0xF8, 0x83, 0xD0,
  67                 0xAB, 0x94, 0x42, 0x06, 0x95, 0xC7, 0x6D, 0xEB,
  68                 0x2C, 0x75, 0x52,
  69         }) != 0 {
  70                 t.FailNow()
  71         }
  72         if bytes.Compare(sealed[len(plaintext):], []byte{
  73                 0xCF, 0x5D, 0x65, 0x6F, 0x40, 0xC3, 0x4F, 0x5C,
  74                 0x46, 0xE8, 0xBB, 0x0E, 0x29, 0xFC, 0xDB, 0x4C,
  75         }) != 0 {
  76                 t.FailNow()
  77         }
  78         _, err := aead.Open(sealed[:0], nonce, sealed, additionalData)
  79         if err != nil {
  80                 t.FailNow()
  81         }
  82         if bytes.Compare(sealed[:len(plaintext)], plaintext) != 0 {
  83                 t.FailNow()
  84         }
  85 }
  86
  87 func TestSymmetric(t *testing.T) {
  88         sym := func(keySize, blockSize int, c cipher.Block, nonce []byte) {
  89                 f := func(
  90                         plaintext, additionalData []byte,
  91                         initials [][]byte,
  92                         tagSize uint8,
  93                 ) bool {
  94                         if len(plaintext) == 0 && len(additionalData) == 0 {
  95                                 return true
  96                         }
  97                         tagSize = 4 + tagSize%uint8(blockSize-4)
  98                         aead, err := NewMGM(c, int(tagSize))
  99                         if err != nil {
 100                                 return false
 101                         }
 102                         for _, initial := range initials {
 103                                 sealed := aead.Seal(initial, nonce, plaintext, additionalData)
 104                                 if bytes.Compare(sealed[:len(initial)], initial) != 0 {
 105                                         return false
 106                                 }
 107                                 pt, err := aead.Open(
 108                                         sealed[:0],
 109                                         nonce,
 110                                         sealed[len(initial):],
 111                                         additionalData,
 112                                 )
 113                                 if err != nil || bytes.Compare(pt, plaintext) != 0 {
 114                                         return false
 115                                 }
 116                         }
 117                         return true
 118                 }
 119                 if err := quick.Check(f, nil); err != nil {
 120                         t.Error(err)
 121                 }
 122         }
 123
 124         key128 := new([gost3412128.KeySize]byte)
 125         if _, err := rand.Read(key128[:]); err != nil {
 126                 panic(err)
 127         }
 128         nonce := make([]byte, gost3412128.BlockSize)
 129         if _, err := rand.Read(key128[1:]); err != nil {
 130                 panic(err)
 131         }
 132         sym(
 133                 gost3412128.KeySize,
 134                 gost3412128.BlockSize,
 135                 gost3412128.NewCipher(key128[:]),
 136                 nonce[:gost3412128.BlockSize],
 137         )
 138
 139         key64 := new([gost341264.KeySize]byte)
 140         copy(key64[:], key128[:])
 141         sym(
 142                 gost341264.KeySize,
 143                 gost341264.BlockSize,
 144                 gost341264.NewCipher(key64[:]),
 145                 nonce[:gost341264.BlockSize],
 146         )
 147 }