md5加密算法C++程序

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#include "global.h"
7 {" U/ t9 Z3 ~, U7 q; I#include "md5.h"

/* Constants for MD5Transform routine.
*/
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+ c' Z4 ^ ~, k: x- T
#define S11 7
#define S12 12
8 R% {& t# X/ L3 P8 v l#define S13 17
- N1 o7 k. |! O* m! j) f#define S14 22
#define S21 5
#define S22 9
! M" }9 x2 u- r. n; u B4 s#define S23 14
#define S24 20
5 h( S* {2 [- \$ R! e, L" N#define S31 4
#define S32 11
#define S33 16
#define S34 23
) u1 q5 s- b3 z" q% |7 l3 D0 f#define S41 6
9 e8 U8 U0 \! T) w7 Y& G* x$ T2 A#define S42 10
1 ~$ C6 B5 c" _: V+ v7 c7 t#define S43 15
' _$ }1 c1 Z' a5 Z9 Z+ H#define S44 21

) F% D& z8 P/ [1 Z2 P% J$ U( W. bstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
. ^: ~+ U4 H1 [6 |- f: Estatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
; J. u2 }! _7 T( r7 }static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

1 Z/ b6 [4 }/ ?) V- T) }1 qstatic 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
! {7 w7 T( f% N8 S0 V};
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/* F, G, H and I are basic MD5 functions.
*/
! I" J* c" S- x8 b; c9 g: v#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))
# l1 a; _7 M; ]0 T; {#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))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
' ?+ Y! {' e7 c3 H/ QRotation 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); \
}
# O7 S, z; S/ \, v9 j#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
- r1 \, a' U ?#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); \
}

* a. y1 U8 f4 l) D' A/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
, x- Y; t) e3 e6 UMD5_CTX *context; /* context */
7 \* `5 i5 {# |6 C6 i{
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;
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
7 P' y. r/ H D* ~1 ~void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
1 |! U+ i' k$ K+ A& kunsigned int inputLen; /* length of input block */
% Z, S' c: I% o{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
, J& y) I$ G* [8 @) G; P. l, c5 V
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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