md5加密算法C++程序

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#include "global.h"
+ J: _/ j/ k1 p1 O, u+ f' V. V#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
, x1 {5 U4 K1 {#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
% Y, o: D1 |" ]6 ]; L#define S33 16
6 S$ O4 Z! _9 x) I8 H0 ]$ t. _#define S34 23
#define S41 6
# T& m5 R, T5 {- D5 q" U#define S42 10
#define S43 15
#define S44 21
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/ q( \/ f) m" W) j& v/ Xstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
! B& E# p9 Q0 Lstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
& o% V6 A& j0 Z! [ y. a' kstatic 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));
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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
5 l6 E5 L0 d4 X};
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4 [' K5 i$ J' k5 X/* F, G, H and I are basic MD5 functions.
*/
) f m! Z7 P% D! [#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
) O, C/ l+ M* z. V+ x: l" F. o#define H(x, y, z) ((x) ^ (y) ^ (z))
% _/ X. B& T3 ]3 j: }#define I(x, y, z) ((y) ^ ((x) | (~z)))
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6 j; Y- a' V9 m8 I- K/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

" P6 ?: v- N/ r: E; Z/ b/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
7 u: k Z, ^" p, t# A* G$ _#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
& L8 I% t" z2 ~3 F#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
: d2 Z: p+ \4 K3 @1 f: G& E/ 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); \
}
/ f J3 C( N. v/ u#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)
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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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% T/ ]- Q5 w: C+ N, O/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
5 V, a; s4 F, p/ m' v7 Yvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
( F2 ~) q) q9 ~2 Z/ ounsigned int inputLen; /* length of input block */
& N) d: m4 n0 y{
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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