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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