md5加密算法C++程序

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#include "global.h"
) A$ k! z* ~0 h" j#include "md5.h"
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0 e! H& H( O( d( R- n5 T- M* u8 Z/* Constants for MD5Transform routine.
*/

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$ B0 p! a9 ]# X) r. Q6 U- R9 s#define S11 7
. Y6 e8 W# @- w2 U7 J#define S12 12
4 F& ?, d. C' u7 L#define S13 17
#define S14 22
#define S21 5
#define S22 9
. e8 G1 O3 {; E( {4 B#define S23 14
0 e' w9 a l+ R7 S7 Q* r; f% Q#define S24 20
+ J/ q- p7 F/ \* G1 u/ b8 |5 [#define S31 4
#define S32 11
#define S33 16
% F# k0 W0 ~7 Q0 g#define S34 23
#define S41 6
#define S42 10
+ z: T! T9 l1 A; `% K, U. ^: A#define S43 15
#define S44 21

0 a4 r) B$ ]) T& E0 b1 t7 e1 K% qstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static 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));
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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
; Q5 a$ {- M$ P+ t) k};

/* F, G, H and I are basic MD5 functions.
*/
: M/ d- @) F' w- q7 H#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
! ]# ` u' _2 | |: o#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
! l$ T2 Z7 Q; |#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* 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); \
}
#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); \
}
- q! e+ l( h4 u6 T h) ~$ [#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.
*/
* N- ~6 V/ g( q f+ {void MD5Init (context)
MD5_CTX *context; /* context */
4 y1 O% W; o7 d) P) `{
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;
: s7 O' F$ Q/ _! t" ~) }* R" y! \}
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0 O9 c3 I6 G1 v5 u+ B/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
5 H" b; ?; J3 x) h& u" Ovoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
& h5 U$ b& [- D& p+ w# Zunsigned 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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