md5加密算法C++程序

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

5 f0 r$ O r; W V) J/ e/* Constants for MD5Transform routine.
*/
% {2 D n. Z8 ?- i8 X; s

#define S11 7
#define S12 12
: C$ v% O7 S* s#define S13 17
! N) D% U! R: W: h! Y* e$ W' ?#define S14 22
#define S21 5
#define S22 9
9 M0 M3 g6 L) I5 j5 H$ m7 b' x4 _#define S23 14
#define S24 20
#define S31 4
, O( M5 ?. C6 }+ U2 R; Y8 O& V#define S32 11
+ {7 }7 k% t5 G. W' G#define S33 16
#define S34 23
( x" d! I: y7 y: f4 i7 a$ F#define S41 6
#define S42 10
3 w! c: I2 O# `" y: w( X#define S43 15
- e! R& W) m( ?7 |- k; q#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
6 I/ |. K( @; N. i2 y, ~" p% v* l0 Gstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
& G) L( d& S+ `/ S4 e# |5 ustatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
* t1 G% Z8 P! ^# `2 bstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

& ~0 o/ X- c3 t/ H7 d9 n( C9 vstatic 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
};
1 |! y H* h+ S% a+ t
/* F, G, H and I are basic MD5 functions.
*/
3 ~ N7 z7 a# v! W, U#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))
$ o4 X. \1 s. v' `, r, i#define I(x, y, z) ((y) ^ ((x) | (~z)))

0 ]+ o* ]7 x: ~8 R' V8 [/* ROTATE_LEFT rotates x left n bits.
*/
6 H Z8 x% Q% F; F7 J+ v#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
" {# ]" F, _3 N* {; ~2 M( |9 x
/ H# }" T0 }3 l- l+ p/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation 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); \
}
# \0 F: Z$ u- q: [: [# y#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
- n0 ^8 _& B* n3 N& g1 u- B1 Y#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.
*/
! U* {! k0 h+ R. N+ K1 gvoid MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
1 a6 \* O7 ~. U0 c& N3 ~*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
' G. L0 F9 A5 Y: S0 p' ]}

% ^, X: Y+ x: ~/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
9 h6 K* i j# _* cvoid MD5Update (context, input, inputLen)
' u6 I& A* S* @1 [, [/ g! H2 EMD5_CTX *context; /* context */
5 ] W7 I6 S% r" X0 Eunsigned char *input; /* input block */
( E$ @; X7 i8 X# Punsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
, e3 m$ i& |/ w6 |" A
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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