OLD | NEW |
1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 part of crypto; | 5 part of crypto; |
6 | 6 |
7 /** | 7 /** |
8 * MD5 hash function implementation. | 8 * MD5 hash function implementation. |
9 * | 9 * |
10 * WARNING: MD5 has known collisions and should only be used when | 10 * WARNING: MD5 has known collisions and should only be used when |
11 * required for backwards compatibility. | 11 * required for backwards compatibility. |
12 */ | 12 */ |
13 class MD5 extends _HashBase { | 13 class MD5 extends _HashBase { |
14 MD5(): super(16, 4, false) { | 14 MD5() : super(16, 4, false) { |
15 _h[0] = 0x67452301; | 15 _h[0] = 0x67452301; |
16 _h[1] = 0xefcdab89; | 16 _h[1] = 0xefcdab89; |
17 _h[2] = 0x98badcfe; | 17 _h[2] = 0x98badcfe; |
18 _h[3] = 0x10325476; | 18 _h[3] = 0x10325476; |
19 } | 19 } |
20 | 20 |
21 // Returns a new instance of this Hash. | 21 // Returns a new instance of this Hash. |
22 MD5 newInstance() { | 22 MD5 newInstance() { |
23 return new MD5(); | 23 return new MD5(); |
24 } | 24 } |
25 | 25 |
26 static const _k = const [ | 26 static const _k = const [ |
27 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 0xf57c0faf, 0x4787c62a, | 27 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 0xf57c0faf, 0x4787c62a, |
28 0xa8304613, 0xfd469501, 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, | 28 0xa8304613, 0xfd469501, 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, |
29 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, 0xf61e2562, 0xc040b340, | 29 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, 0xf61e2562, 0xc040b340, |
30 0x265e5a51, 0xe9b6c7aa, 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8, | 30 0x265e5a51, 0xe9b6c7aa, 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8, |
31 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, 0xa9e3e905, 0xfcefa3f8, | 31 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, 0xa9e3e905, 0xfcefa3f8, |
32 0x676f02d9, 0x8d2a4c8a, 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, | 32 0x676f02d9, 0x8d2a4c8a, 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, |
33 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, 0x289b7ec6, 0xeaa127fa, | 33 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, 0x289b7ec6, 0xeaa127fa, |
34 0xd4ef3085, 0x04881d05, 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665, | 34 0xd4ef3085, 0x04881d05, 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665, |
35 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, 0x655b59c3, 0x8f0ccc92, | 35 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, 0x655b59c3, 0x8f0ccc92, |
36 0xffeff47d, 0x85845dd1, 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, | 36 0xffeff47d, 0x85845dd1, 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, |
37 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391 ]; | 37 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391 |
| 38 ]; |
38 | 39 |
39 static const _r = const [ | 40 static const _r = const [ |
40 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 5, 9, 14, | 41 07, 12, 17, 22, 07, 12, 17, 22, 07, 12, 17, 22, 07, 12, 17, 22, 05, 09, 14, |
41 20, 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, 4, 11, 16, 23, 4, 11, | 42 20, 05, 09, 14, 20, 05, 09, 14, 20, 05, 09, 14, 20, 04, 11, 16, 23, 04, 11, |
42 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 6, 10, 15, 21, 6, 10, 15, 21, 6, | 43 16, 23, 04, 11, 16, 23, 04, 11, 16, 23, 06, 10, 15, 21, 06, 10, 15, 21, 06, |
43 10, 15, 21, 6, 10, 15, 21 ]; | 44 10, 15, 21, 06, 10, 15, 21 |
| 45 ]; |
44 | 46 |
45 // Compute one iteration of the MD5 algorithm with a chunk of | 47 // Compute one iteration of the MD5 algorithm with a chunk of |
46 // 16 32-bit pieces. | 48 // 16 32-bit pieces. |
47 void _updateHash(Uint32List m) { | 49 void _updateHash(Uint32List m) { |
48 assert(m.length == 16); | 50 assert(m.length == 16); |
49 | 51 |
50 var a = _h[0]; | 52 var a = _h[0]; |
51 var b = _h[1]; | 53 var b = _h[1]; |
52 var c = _h[2]; | 54 var c = _h[2]; |
53 var d = _h[3]; | 55 var d = _h[3]; |
(...skipping 12 matching lines...) Expand all Loading... |
66 t0 = b ^ c ^ d; | 68 t0 = b ^ c ^ d; |
67 t1 = ((3 * i) + 5) % 16; | 69 t1 = ((3 * i) + 5) % 16; |
68 } else { | 70 } else { |
69 t0 = c ^ (b | (~d & _MASK_32)); | 71 t0 = c ^ (b | (~d & _MASK_32)); |
70 t1 = (7 * i) % 16; | 72 t1 = (7 * i) % 16; |
71 } | 73 } |
72 | 74 |
73 var temp = d; | 75 var temp = d; |
74 d = c; | 76 d = c; |
75 c = b; | 77 c = b; |
76 b = _add32(b, _rotl32(_add32(_add32(a, t0), | 78 b = _add32( |
77 _add32(_k[i], m[t1])), | 79 b, _rotl32(_add32(_add32(a, t0), _add32(_k[i], m[t1])), _r[i])); |
78 _r[i])); | |
79 a = temp; | 80 a = temp; |
80 } | 81 } |
81 | 82 |
82 _h[0] = _add32(a, _h[0]); | 83 _h[0] = _add32(a, _h[0]); |
83 _h[1] = _add32(b, _h[1]); | 84 _h[1] = _add32(b, _h[1]); |
84 _h[2] = _add32(c, _h[2]); | 85 _h[2] = _add32(c, _h[2]); |
85 _h[3] = _add32(d, _h[3]); | 86 _h[3] = _add32(d, _h[3]); |
86 } | 87 } |
87 } | 88 } |
OLD | NEW |