md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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+ C4 N. m8 j9 G# `# e9 t1 N#define S11 7
6 `6 V( K- I! { Q) }#define S12 12
#define S13 17
* g/ ]* T6 [, Z2 K#define S14 22
#define S21 5
/ h! x, `2 Z- B" p1 _ S#define S22 9
( e" q6 I5 X* i# y/ X#define S23 14
! Q& q' s) S3 g" H% ~$ s#define S24 20
6 ]1 }3 [! f0 p7 ~& `0 L#define S31 4
' M# P* o2 }" ]" R0 j#define S32 11
$ o- @/ g$ s3 L' y, u& |1 |#define S33 16
#define S34 23
' ?& G' H0 D' e+ c+ R- `#define S41 6
0 B+ f1 o' ?+ e#define S42 10
#define S43 15
#define S44 21
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" c- s. o( D5 P3 L" tstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
1 d: q7 U% [1 r% o8 Wstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
& h, P1 N& H' D* U! E+ @static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
8 ^+ }$ i8 @3 k; r+ M8 }/ M2 q, ]static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
1 o" {* F) A% j. J9 S$ q' N6 T. ^& jstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

: b- B2 Z! U* B7 R: E8 estatic 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
};

& o3 C3 Q7 \% N/ {% y/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
4 p# K" C4 J! g# L4 t+ H#define H(x, y, z) ((x) ^ (y) ^ (z))
5 x8 g3 Q p1 Z#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
6 I5 X* g: Q8 C#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

+ d% j: _ S+ B8 {. ?. j, f/ r" x/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
9 z, @( ]5 R2 a! B+ ~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); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
& ]/ l* t4 r, e! `& R! C- ]; A#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
5 R- t+ X E2 q" e# N: [: K#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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( X# c# ?9 f; |$ Z" w3 L/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void 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;
/ ]4 t& P. @/ c2 P1 v}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
2 D+ X6 Y! E; G* ~6 y% x1 funsigned char *input; /* input block */
6 i. `3 |0 E) O, ?- }- ounsigned 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);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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