md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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1 O. ~0 z T( J#define S11 7
#define S12 12
#define S13 17
, |, j" ]" ]+ D1 W5 d8 N#define S14 22
5 E. @2 X- V. N! u4 X9 Z" c#define S21 5
#define S22 9
#define S23 14
; p$ P0 s# b- c4 y. [9 G#define S24 20
- b' @# K, t' k' b#define S31 4
5 G4 I- D/ Z7 u: @6 i8 S* Y+ l5 Z) Q#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
* f, u2 q# _7 K v3 B#define S43 15
#define S44 21

& K$ e8 G# d7 x7 ~' X: I, \$ m( D7 Astatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
$ U1 Q n; t6 H: Kstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
4 J" c* |, m0 Ostatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
8 c/ f) q# T5 `static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
* c' z& }/ C' @, Ostatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

static 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
};

/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
. g U; J, N2 L0 j$ C( _- T, f#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
; \1 _5 z( r" L( o: ]0 P' W: T#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

1 e8 _3 |; N- W7 U$ o1 Y/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
8 r4 y& e& j D+ t, {7 TRotation is separate from addition to prevent recomputation.
*/
#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); \
}
% m3 D+ m; i0 Y0 D# r1 K' i1 [#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
% b) F2 [4 `* a. O% z#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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; z7 v: J9 Z% n% H/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
4 A0 b% A- N, O# ]" Bvoid MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
8 i- L% w# f" v/ O% }*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
5 A+ l) E9 }9 u7 v- I8 T* ]void MD5Update (context, input, inputLen)
0 I, R" B4 [0 |, ~* zMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
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unsigned int i, index, partLen;
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/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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