ctr_aes_test.go

Documentation: crypto/cipher

     1  // Copyright 2009 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // CTR AES test vectors.
     6  
     7  // See U.S. National Institute of Standards and Technology (NIST)
     8  // Special Publication 800-38A, ``Recommendation for Block Cipher
     9  // Modes of Operation,'' 2001 Edition, pp. 55-58.
    10  
    11  package cipher_test
    12  
    13  import (
    14  	"bytes"
    15  	"crypto/aes"
    16  	"crypto/cipher"
    17  	"testing"
    18  )
    19  
    20  var commonCounter = []byte{0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff}
    21  
    22  var ctrAESTests = []struct {
    23  	name string
    24  	key  []byte
    25  	iv   []byte
    26  	in   []byte
    27  	out  []byte
    28  }{
    29  	// NIST SP 800-38A pp 55-58
    30  	{
    31  		"CTR-AES128",
    32  		commonKey128,
    33  		commonCounter,
    34  		commonInput,
    35  		[]byte{
    36  			0x87, 0x4d, 0x61, 0x91, 0xb6, 0x20, 0xe3, 0x26, 0x1b, 0xef, 0x68, 0x64, 0x99, 0x0d, 0xb6, 0xce,
    37  			0x98, 0x06, 0xf6, 0x6b, 0x79, 0x70, 0xfd, 0xff, 0x86, 0x17, 0x18, 0x7b, 0xb9, 0xff, 0xfd, 0xff,
    38  			0x5a, 0xe4, 0xdf, 0x3e, 0xdb, 0xd5, 0xd3, 0x5e, 0x5b, 0x4f, 0x09, 0x02, 0x0d, 0xb0, 0x3e, 0xab,
    39  			0x1e, 0x03, 0x1d, 0xda, 0x2f, 0xbe, 0x03, 0xd1, 0x79, 0x21, 0x70, 0xa0, 0xf3, 0x00, 0x9c, 0xee,
    40  		},
    41  	},
    42  	{
    43  		"CTR-AES192",
    44  		commonKey192,
    45  		commonCounter,
    46  		commonInput,
    47  		[]byte{
    48  			0x1a, 0xbc, 0x93, 0x24, 0x17, 0x52, 0x1c, 0xa2, 0x4f, 0x2b, 0x04, 0x59, 0xfe, 0x7e, 0x6e, 0x0b,
    49  			0x09, 0x03, 0x39, 0xec, 0x0a, 0xa6, 0xfa, 0xef, 0xd5, 0xcc, 0xc2, 0xc6, 0xf4, 0xce, 0x8e, 0x94,
    50  			0x1e, 0x36, 0xb2, 0x6b, 0xd1, 0xeb, 0xc6, 0x70, 0xd1, 0xbd, 0x1d, 0x66, 0x56, 0x20, 0xab, 0xf7,
    51  			0x4f, 0x78, 0xa7, 0xf6, 0xd2, 0x98, 0x09, 0x58, 0x5a, 0x97, 0xda, 0xec, 0x58, 0xc6, 0xb0, 0x50,
    52  		},
    53  	},
    54  	{
    55  		"CTR-AES256",
    56  		commonKey256,
    57  		commonCounter,
    58  		commonInput,
    59  		[]byte{
    60  			0x60, 0x1e, 0xc3, 0x13, 0x77, 0x57, 0x89, 0xa5, 0xb7, 0xa7, 0xf5, 0x04, 0xbb, 0xf3, 0xd2, 0x28,
    61  			0xf4, 0x43, 0xe3, 0xca, 0x4d, 0x62, 0xb5, 0x9a, 0xca, 0x84, 0xe9, 0x90, 0xca, 0xca, 0xf5, 0xc5,
    62  			0x2b, 0x09, 0x30, 0xda, 0xa2, 0x3d, 0xe9, 0x4c, 0xe8, 0x70, 0x17, 0xba, 0x2d, 0x84, 0x98, 0x8d,
    63  			0xdf, 0xc9, 0xc5, 0x8d, 0xb6, 0x7a, 0xad, 0xa6, 0x13, 0xc2, 0xdd, 0x08, 0x45, 0x79, 0x41, 0xa6,
    64  		},
    65  	},
    66  }
    67  
    68  func TestCTR_AES(t *testing.T) {
    69  	for _, tt := range ctrAESTests {
    70  		test := tt.name
    71  
    72  		c, err := aes.NewCipher(tt.key)
    73  		if err != nil {
    74  			t.Errorf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err)
    75  			continue
    76  		}
    77  
    78  		for j := 0; j <= 5; j += 5 {
    79  			in := tt.in[0 : len(tt.in)-j]
    80  			ctr := cipher.NewCTR(c, tt.iv)
    81  			encrypted := make([]byte, len(in))
    82  			ctr.XORKeyStream(encrypted, in)
    83  			if out := tt.out[0:len(in)]; !bytes.Equal(out, encrypted) {
    84  				t.Errorf("%s/%d: CTR\ninpt %x\nhave %x\nwant %x", test, len(in), in, encrypted, out)
    85  			}
    86  		}
    87  
    88  		for j := 0; j <= 7; j += 7 {
    89  			in := tt.out[0 : len(tt.out)-j]
    90  			ctr := cipher.NewCTR(c, tt.iv)
    91  			plain := make([]byte, len(in))
    92  			ctr.XORKeyStream(plain, in)
    93  			if out := tt.in[0:len(in)]; !bytes.Equal(out, plain) {
    94  				t.Errorf("%s/%d: CTRReader\nhave %x\nwant %x", test, len(out), plain, out)
    95  			}
    96  		}
    97  
    98  		if t.Failed() {
    99  			break
   100  		}
   101  	}
   102  }
   103
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