md5加密算法C++程序

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#include "global.h"
9 f* u& W) C4 H: m4 r; M, N#include "md5.h"

/* Constants for MD5Transform routine.
*/

$ ?5 ~3 \% ]5 y+ N
#define S11 7
+ @( Q0 @5 M4 ]6 J- }, P7 r% |#define S12 12
#define S13 17
& I; U/ s" k* k i7 ^: l" l#define S14 22
#define S21 5
#define S22 9
. q/ U/ ^, a: p#define S23 14
! ^' U' H: {; n$ e9 [#define S24 20
0 Q5 ], g: T0 ]2 f! O, b. {& Y" m- A#define S31 4
$ A5 d. d5 ~0 ~9 |0 S1 _& G" U#define S32 11
#define S33 16
9 [( I2 l/ ]/ c/ B+ \% U! z% G#define S34 23
#define S41 6
#define S42 10
/ P2 ^: W D: c3 x# G# H#define S43 15
) |" y% P' V3 X1 S4 o#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
& w4 s, L& l$ q- W' ?static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
5 v, E$ b% f6 r7 }7 o4 Nstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

" G+ T! D f- @4 d7 \; ]% V6 W; O" Astatic 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
};

0 P. @. }' P b& f) {, U8 [/* F, G, H and I are basic MD5 functions.
*/
- o1 | b1 e3 F* g- D#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
. Q; y4 i2 S `8 `& y4 g* P#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
2 \' _! ^ U+ f
# G8 P0 y) u; L% G; V- n/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

5 G# B1 y6 M+ D/* 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); \
}
+ p, c: i3 a8 q; r: e5 a D: C( i#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); \
}
" J: N" c. w' @) O& T#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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+ o8 D- p; Z& `5 @1 |; n/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
: i& p Y" e0 x+ Yvoid MD5Init (context)
MD5_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;
; A" H3 ?3 e- X% V8 ~3 j) t}

3 P8 z, I. ^/ u. A/ C" Q9 f6 C0 V/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
6 d* k; w4 d% J8 S# Dvoid MD5Update (context, input, inputLen)
& H+ q6 I* k# X/ @; P9 `( M9 `MD5_CTX *context; /* context */
' m5 c2 q6 J3 Aunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
; r. Z- l% ]0 y3 S{
unsigned int i, index, partLen;
: v& _+ H9 m) Q* F! a K' }
/* 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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