md5加密算法C++程序

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#include "global.h"
#include "md5.h"

/* Constants for MD5Transform routine.
*/
, [4 z% L0 ~' [
7 j2 Y3 e0 X" Q: Q3 ~
2 D1 N8 E/ s4 s9 B. ]. q% m1 s#define S11 7
#define S12 12
& C8 a$ J1 d/ F5 \. S6 M5 w#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
+ V( T5 V( F" k#define S24 20
- m! j, k$ Z6 u2 H( A+ w9 M g#define S31 4
9 f" F6 d7 m! c" S; l" j#define S32 11
* z5 W _6 K7 f2 r#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
. r/ p& O; s. Z5 I#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
4 Z3 g r% C$ B( n+ astatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

& ?0 P+ r" s. Astatic 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
9 q1 T# P7 u. ?- e) ?% c$ M% x};

- x) c1 a. G1 {! B& q% n/* F, G, H and I are basic MD5 functions.
*/
: y+ P7 \$ S2 c/ a#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
# a4 ~* R3 O8 S! F2 j#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
; y% E# Q1 D6 B5 |) q; K#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

; g/ L; [* ?1 w% d/ \9 q" o' E/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
; y8 s0 N! }# Z) \0 [ K( J ORotation 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); \
}
& F5 a2 {) o1 ~, h1 D b1 R#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
4 z: f% @. V9 q) ?#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#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.
*/
void MD5Init (context)
( f, n: B- K i3 KMD5_CTX *context; /* context */
1 m6 q- `5 m: f' E{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
3 B' i) k& k. t6 z" q; L}

: ]6 M( b' c3 Y! r3 X/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
5 l2 s6 C, x# Z+ `. p" t" _4 evoid MD5Update (context, input, inputLen)
4 f- ]* F4 ?6 L0 SMD5_CTX *context; /* context */
unsigned char *input; /* input block */
( M4 N y% _, f% [unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;

/* 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))
&

guoyun786

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