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.
*/


1 {3 B9 s: e G" M/ `; G#define S11 7
#define S12 12
#define S13 17
, O7 G3 W* s( e0 l$ s#define S14 22
6 ~& `9 E: K* H6 D2 l9 n" l#define S21 5
! G0 ` n6 h. R7 A/ V" d) G2 t) U#define S22 9
7 u+ @1 p# r- a r8 L# ]# u#define S23 14
* A1 C, C7 z6 `/ ]) Z#define S24 20
~8 @$ a: U' q% ~9 {#define S31 4
2 s" C" P: h! U/ v, N& y#define S32 11
#define S33 16
#define S34 23
. y" M, Z: f9 r* P0 h/ O C; g#define S41 6
#define S42 10
#define S43 15
# D* f8 |$ C( ?; g#define S44 21
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$ z1 K4 w/ P$ C# o" Kstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
) L0 @. G, ]" i) L. J: f4 R; Tstatic 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));
" [$ |/ W$ f+ ^static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

* Z- n2 _. ~6 A. [9 {. ^/ v& tstatic 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
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2 G1 f/ t/ j; g/* F, G, H and I are basic MD5 functions.
*/
- W# |- ^4 @- X) Y( x# Q _#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
' O& E5 V6 u$ M1 |7 f" }" N" G#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
8 g* R. ^8 a0 I( g#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

1 U9 [' c0 x6 U! x$ z' Q' I ~$ Q/ A/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
! M* r) t+ ~( h+ F3 z#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); \
}
#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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- w: _( \, s" X4 K* m/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
! L' b- K6 b: z; n& ^9 B9 Ovoid MD5Init (context)
MD5_CTX *context; /* context */
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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;
! { x7 F; H3 e3 _+ a5 t$ l}
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) A6 ?1 `1 h' a: V; Q4 r( p& E8 K/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
1 `! T1 I4 q2 y- x1 ?( h8 uMD5_CTX *context; /* context */
% c2 \+ `' B- V" `6 c# }7 Tunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
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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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