md5加密算法C++程序

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#include "global.h"
9 C. |" P# }5 z; z#include "md5.h"

/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
6 C# P" h2 y: U$ l4 ]4 U#define S14 22
3 ~# Z1 J( f/ h1 L8 m+ h3 b: @5 s#define S21 5
( [) Z+ |* H, g/ p" J5 E7 s+ T#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
" y% L* {8 e. q( Z% s#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
, \5 V0 F) N- O9 M% Nstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
& y' ]# s+ _ g# hstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
% o: h | r+ r4 o; K3 b! kstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static 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
};
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/* F, G, H and I are basic MD5 functions.
*/
" g$ E: A9 c: U#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
% p6 Z+ U3 J9 [; S5 N5 p- ~#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
) `5 S; \3 H2 s5 E$ u' c1 t#define I(x, y, z) ((y) ^ ((x) | (~z)))
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9 Z- _" A. a O7 S+ I3 ~' S6 ~/* ROTATE_LEFT rotates x left n bits.
*/
& {4 l& F% a: C, h4 ?6 f0 F R6 v/ T#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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" p4 Q+ ?. L; X: s* A' ~+ n/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
" ^/ V3 e. v' Z0 g7 N' uRotation 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); \
}
& h8 y8 v# j6 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); \
}
#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.
*/
. k: w$ C5 S9 b& @void MD5Init (context)
3 v9 E/ q5 x$ w6 jMD5_CTX *context; /* context */
{
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;
+ D6 j! a1 E) @2 f a6 w4 q}
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& W( V& H/ J# I. g% x/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
: |6 ^# N$ a9 t. tMD5_CTX *context; /* context */
unsigned char *input; /* input block */
8 [7 i# ?6 o* H( R3 _1 Hunsigned int inputLen; /* length of input block */
9 w; o5 X& U0 g{
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))
&

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