md5加密算法C++程序

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

. P9 l3 g4 @- X! @! ?7 H/* Constants for MD5Transform routine.
*/
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#define S11 7
4 A8 ~9 ^- f& `! Q u#define S12 12
: \1 n& V8 W# [: m8 L/ P, N) h#define S13 17
#define S14 22
% u# N6 s* f2 _" o, Y, g, r$ @; C#define S21 5
7 W6 @& m2 R- W3 ^9 e" e+ p! k" h#define S22 9
#define S23 14
1 t7 o+ R/ H* {* i; u7 [6 X#define S24 20
# \+ g7 z' _; P$ ^1 w7 D9 H' F#define S31 4
+ ]6 a% q" x a$ Q) `- D! t ~#define S32 11
#define S33 16
#define S34 23
; L$ j7 p, m4 v9 ?9 y( ~5 r( W6 N! a4 E#define S41 6
" z/ u) j8 t2 I9 k0 M5 g; |#define S42 10
#define S43 15
#define S44 21
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6 B$ F8 f) c2 X2 w% `7 `4 a# estatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
! [ Q/ m! t5 F" B, m. O$ rstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
3 d$ \! g& C Y! u8 ^static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
2 ]8 |2 n+ C7 ^3 z Lstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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9 d" K N/ ]1 l( o( z* w( istatic 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
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/* F, G, H and I are basic MD5 functions.
*/
! O- [! l9 O7 y+ M6 n0 L: i#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
$ {, j9 e' F2 p8 k8 w) l#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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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
* D# x2 V J9 M& RRotation 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); \
}
3 q# X: L* a2 F: t2 z& e l* N' `! G#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
6 \. M' \' k/ k$ m2 Q7 F#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
' K! a7 O5 X. C4 w#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
u+ |' u" R1 n- ]+ ~4 _/ I3 Xvoid MD5Init (context)
+ ?# j. h1 t2 v* T% QMD5_CTX *context; /* context */
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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;
}
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: l( E$ ]' g* Y2 ^/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
, W% O4 V" r5 XMD5_CTX *context; /* context */
8 `) _# q; y( q/ J5 I3 A& \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);

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

guoyun786

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