md5加密算法C++程序

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#include "global.h"
! k7 f: {- L. a" m#include "md5.h"

4 m) m, A. |/ m% g/* Constants for MD5Transform routine.
*/

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#define S11 7
/ z) n5 B# e/ I [# X#define S12 12
#define S13 17
' o+ M5 @! N5 c0 w8 C3 w#define S14 22
! v, M% R; y7 y" n9 ^#define S21 5
0 u. ]4 n8 r' u: | N#define S22 9
+ u! q) v3 g- L* a$ ~% z+ s5 E#define S23 14
#define S24 20
6 b/ H4 F8 ~ v$ H2 X+ b#define S31 4
& i; L# t5 ^5 ?- O#define S32 11
0 l( ]" V) M, y0 K#define S33 16
#define S34 23
9 l: }0 Q3 r! M4 H#define S41 6
#define S42 10
#define S43 15
# f1 Y) m; I# W: P; n#define S44 21

' F4 G# Y* p# C: ?' r8 Nstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
8 B! B9 ?/ _ Z$ _. |( sstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static 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));
) a) Z. W x [
- f y! |# b- m2 u6 R4 C' A. ]. Wstatic 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 T& y" X$ Q3 }4 V2 B+ L- F+ i};
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) A) [3 H0 H% ^3 E6 Y% Z1 q$ @/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
7 r7 s* O, f9 c" `# U9 Y' O#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
1 t/ {1 u* a! E9 p2 Z' Q#define H(x, y, z) ((x) ^ (y) ^ (z))
$ \9 x. w; j, w3 ?) L( o#define I(x, y, z) ((y) ^ ((x) | (~z)))
( J4 X5 |/ \1 ~# T
/* ROTATE_LEFT rotates x left n bits.
*/
' `4 f4 l. E1 ? s N#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
, I3 i5 t" |5 e% A) S# t/ E5 \
3 q: H+ H- K6 X8 z5 M/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
" g" l! Q# @1 X7 f- Y#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
5 M x) Q- z% k3 r# g4 x8 n#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.
*/
) d) y$ d. q' d; @, E+ Y* @void MD5Init (context)
3 ~* t. T+ i8 Q4 cMD5_CTX *context; /* context */
" c( Q: Y. B2 E8 G. ?* Y7 K{
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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1 i: D9 B9 d3 g1 r3 k6 U: U/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
# o" M W i3 V& d2 D, \MD5_CTX *context; /* context */
unsigned char *input; /* input block */
: N+ B: Y1 E' ?' h2 ]& ^6 w* vunsigned 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);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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