| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // OFB AES test vectors. |
| |
| // See U.S. National Institute of Standards and Technology (NIST) |
| // Special Publication 800-38A, ``Recommendation for Block Cipher |
| // Modes of Operation,'' 2001 Edition, pp. 52-55. |
| |
| package cipher_test |
| |
| import ( |
| "bytes" |
| "crypto/aes" |
| "crypto/cipher" |
| "crypto/des" |
| "crypto/internal/cryptotest" |
| "fmt" |
| "testing" |
| ) |
| |
| type ofbTest struct { |
| name string |
| key []byte |
| iv []byte |
| in []byte |
| out []byte |
| } |
| |
| var ofbTests = []ofbTest{ |
| // NIST SP 800-38A pp 52-55 |
| { |
| "OFB-AES128", |
| commonKey128, |
| commonIV, |
| commonInput, |
| []byte{ |
| 0x3b, 0x3f, 0xd9, 0x2e, 0xb7, 0x2d, 0xad, 0x20, 0x33, 0x34, 0x49, 0xf8, 0xe8, 0x3c, 0xfb, 0x4a, |
| 0x77, 0x89, 0x50, 0x8d, 0x16, 0x91, 0x8f, 0x03, 0xf5, 0x3c, 0x52, 0xda, 0xc5, 0x4e, 0xd8, 0x25, |
| 0x97, 0x40, 0x05, 0x1e, 0x9c, 0x5f, 0xec, 0xf6, 0x43, 0x44, 0xf7, 0xa8, 0x22, 0x60, 0xed, 0xcc, |
| 0x30, 0x4c, 0x65, 0x28, 0xf6, 0x59, 0xc7, 0x78, 0x66, 0xa5, 0x10, 0xd9, 0xc1, 0xd6, 0xae, 0x5e, |
| }, |
| }, |
| { |
| "OFB-AES192", |
| commonKey192, |
| commonIV, |
| commonInput, |
| []byte{ |
| 0xcd, 0xc8, 0x0d, 0x6f, 0xdd, 0xf1, 0x8c, 0xab, 0x34, 0xc2, 0x59, 0x09, 0xc9, 0x9a, 0x41, 0x74, |
| 0xfc, 0xc2, 0x8b, 0x8d, 0x4c, 0x63, 0x83, 0x7c, 0x09, 0xe8, 0x17, 0x00, 0xc1, 0x10, 0x04, 0x01, |
| 0x8d, 0x9a, 0x9a, 0xea, 0xc0, 0xf6, 0x59, 0x6f, 0x55, 0x9c, 0x6d, 0x4d, 0xaf, 0x59, 0xa5, 0xf2, |
| 0x6d, 0x9f, 0x20, 0x08, 0x57, 0xca, 0x6c, 0x3e, 0x9c, 0xac, 0x52, 0x4b, 0xd9, 0xac, 0xc9, 0x2a, |
| }, |
| }, |
| { |
| "OFB-AES256", |
| commonKey256, |
| commonIV, |
| commonInput, |
| []byte{ |
| 0xdc, 0x7e, 0x84, 0xbf, 0xda, 0x79, 0x16, 0x4b, 0x7e, 0xcd, 0x84, 0x86, 0x98, 0x5d, 0x38, 0x60, |
| 0x4f, 0xeb, 0xdc, 0x67, 0x40, 0xd2, 0x0b, 0x3a, 0xc8, 0x8f, 0x6a, 0xd8, 0x2a, 0x4f, 0xb0, 0x8d, |
| 0x71, 0xab, 0x47, 0xa0, 0x86, 0xe8, 0x6e, 0xed, 0xf3, 0x9d, 0x1c, 0x5b, 0xba, 0x97, 0xc4, 0x08, |
| 0x01, 0x26, 0x14, 0x1d, 0x67, 0xf3, 0x7b, 0xe8, 0x53, 0x8f, 0x5a, 0x8b, 0xe7, 0x40, 0xe4, 0x84, |
| }, |
| }, |
| } |
| |
| func TestOFB(t *testing.T) { |
| for _, tt := range ofbTests { |
| test := tt.name |
| |
| c, err := aes.NewCipher(tt.key) |
| if err != nil { |
| t.Errorf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err) |
| continue |
| } |
| |
| for j := 0; j <= 5; j += 5 { |
| plaintext := tt.in[0 : len(tt.in)-j] |
| ofb := cipher.NewOFB(c, tt.iv) |
| ciphertext := make([]byte, len(plaintext)) |
| ofb.XORKeyStream(ciphertext, plaintext) |
| if !bytes.Equal(ciphertext, tt.out[:len(plaintext)]) { |
| t.Errorf("%s/%d: encrypting\ninput % x\nhave % x\nwant % x", test, len(plaintext), plaintext, ciphertext, tt.out) |
| } |
| } |
| |
| for j := 0; j <= 5; j += 5 { |
| ciphertext := tt.out[0 : len(tt.in)-j] |
| ofb := cipher.NewOFB(c, tt.iv) |
| plaintext := make([]byte, len(ciphertext)) |
| ofb.XORKeyStream(plaintext, ciphertext) |
| if !bytes.Equal(plaintext, tt.in[:len(ciphertext)]) { |
| t.Errorf("%s/%d: decrypting\nhave % x\nwant % x", test, len(ciphertext), plaintext, tt.in) |
| } |
| } |
| |
| if t.Failed() { |
| break |
| } |
| } |
| } |
| |
| func TestOFBStream(t *testing.T) { |
| |
| for _, keylen := range []int{128, 192, 256} { |
| |
| t.Run(fmt.Sprintf("AES-%d", keylen), func(t *testing.T) { |
| rng := newRandReader(t) |
| |
| key := make([]byte, keylen/8) |
| rng.Read(key) |
| |
| block, err := aes.NewCipher(key) |
| if err != nil { |
| panic(err) |
| } |
| |
| cryptotest.TestStreamFromBlock(t, block, cipher.NewOFB) |
| }) |
| } |
| |
| t.Run("DES", func(t *testing.T) { |
| rng := newRandReader(t) |
| |
| key := make([]byte, 8) |
| rng.Read(key) |
| |
| block, err := des.NewCipher(key) |
| if err != nil { |
| panic(err) |
| } |
| |
| cryptotest.TestStreamFromBlock(t, block, cipher.NewOFB) |
| }) |
| } |