md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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2 F, y: E4 F! Z! s0 n4 D( ^/* Constants for MD5Transform routine.
*/


#define S11 7
J1 o( C7 z, `$ i0 [#define S12 12
' @7 f+ g9 e0 e: x4 K N9 z0 H#define S13 17
#define S14 22
#define S21 5
#define S22 9
/ f$ i. A' p2 X#define S23 14
#define S24 20
#define S31 4
h% J) j- G- H) N4 q#define S32 11
- h6 K A+ I4 b/ F+ z: K$ S#define S33 16
" ]) t' K& f0 Y#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21
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$ i, k G7 R/ ~6 s2 |# G2 n Dstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
5 @. y. n' f" l( }static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
) Y2 T0 b! G7 ]. L' }0 Istatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
# j1 v+ Y7 \: ?4 @7 {% Zstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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; F% g7 Q( Q; A: q d; Jstatic unsigned char PADDING[64] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};

' k# l( S/ T8 H, I# H5 d0 ^/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
' O7 F$ o) }7 I& E0 ?# z9 D/ ^6 ^#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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- N1 h; s! s. [/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
! S+ X( u1 K7 i4 Q% I# `' r1 U. B#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
( T9 q' A! u+ W3 L2 o& |# n#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
' q% A% K/ c9 ^& A# F3 wvoid MD5Init (context)
MD5_CTX *context; /* context */
/ X( B/ C2 Y1 X- F{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
5 c; }) b' I3 Q( t8 ~$ J*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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( ], h8 u# L) }# |% w/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
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/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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