Crypto++  5.6.3
Free C++ class library of cryptographic schemes
md4.cpp
1 // md4.cpp - modified by Wei Dai from Andrew M. Kuchling's md4.c
2 // The original code and all modifications are in the public domain.
3 
4 // This is the original introductory comment:
5 
6 /*
7  * md4.c : MD4 hash algorithm.
8  *
9  * Part of the Python Cryptography Toolkit, version 1.1
10  *
11  * Distribute and use freely; there are no restrictions on further
12  * dissemination and usage except those imposed by the laws of your
13  * country of residence.
14  *
15  */
16 
17 #include "pch.h"
18 #define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1
19 #include "md4.h"
20 #include "misc.h"
21 
22 NAMESPACE_BEGIN(CryptoPP)
23 namespace Weak1 {
24 
25 void MD4::InitState(HashWordType *state)
26 {
27  state[0] = 0x67452301L;
28  state[1] = 0xefcdab89L;
29  state[2] = 0x98badcfeL;
30  state[3] = 0x10325476L;
31 }
32 
33 void MD4::Transform (word32 *digest, const word32 *in)
34 {
35 // #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
36 #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
37 #define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
38 #define H(x, y, z) ((x) ^ (y) ^ (z))
39 
40  word32 A, B, C, D;
41 
42  A=digest[0];
43  B=digest[1];
44  C=digest[2];
45  D=digest[3];
46 
47 #define function(a,b,c,d,k,s) a=rotlFixed(a+F(b,c,d)+in[k],s);
48  function(A,B,C,D, 0, 3);
49  function(D,A,B,C, 1, 7);
50  function(C,D,A,B, 2,11);
51  function(B,C,D,A, 3,19);
52  function(A,B,C,D, 4, 3);
53  function(D,A,B,C, 5, 7);
54  function(C,D,A,B, 6,11);
55  function(B,C,D,A, 7,19);
56  function(A,B,C,D, 8, 3);
57  function(D,A,B,C, 9, 7);
58  function(C,D,A,B,10,11);
59  function(B,C,D,A,11,19);
60  function(A,B,C,D,12, 3);
61  function(D,A,B,C,13, 7);
62  function(C,D,A,B,14,11);
63  function(B,C,D,A,15,19);
64 
65 #undef function
66 #define function(a,b,c,d,k,s) a=rotlFixed(a+G(b,c,d)+in[k]+0x5a827999,s);
67  function(A,B,C,D, 0, 3);
68  function(D,A,B,C, 4, 5);
69  function(C,D,A,B, 8, 9);
70  function(B,C,D,A,12,13);
71  function(A,B,C,D, 1, 3);
72  function(D,A,B,C, 5, 5);
73  function(C,D,A,B, 9, 9);
74  function(B,C,D,A,13,13);
75  function(A,B,C,D, 2, 3);
76  function(D,A,B,C, 6, 5);
77  function(C,D,A,B,10, 9);
78  function(B,C,D,A,14,13);
79  function(A,B,C,D, 3, 3);
80  function(D,A,B,C, 7, 5);
81  function(C,D,A,B,11, 9);
82  function(B,C,D,A,15,13);
83 
84 #undef function
85 #define function(a,b,c,d,k,s) a=rotlFixed(a+H(b,c,d)+in[k]+0x6ed9eba1,s);
86  function(A,B,C,D, 0, 3);
87  function(D,A,B,C, 8, 9);
88  function(C,D,A,B, 4,11);
89  function(B,C,D,A,12,15);
90  function(A,B,C,D, 2, 3);
91  function(D,A,B,C,10, 9);
92  function(C,D,A,B, 6,11);
93  function(B,C,D,A,14,15);
94  function(A,B,C,D, 1, 3);
95  function(D,A,B,C, 9, 9);
96  function(C,D,A,B, 5,11);
97  function(B,C,D,A,13,15);
98  function(A,B,C,D, 3, 3);
99  function(D,A,B,C,11, 9);
100  function(C,D,A,B, 7,11);
101  function(B,C,D,A,15,15);
102 
103  digest[0]+=A;
104  digest[1]+=B;
105  digest[2]+=C;
106  digest[3]+=D;
107 }
108 
109 }
110 NAMESPACE_END
Utility functions for the Crypto++ library.
Crypto++ library namespace.