md5加密算法C++程序

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#include "global.h"
5 Y/ t1 @, r* m" U#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
( c! i, B: b0 N" Q" \#define S14 22
7 ~! o7 d" i* u& X9 ^" M" ~#define S21 5
2 d: ]7 b% ?% O9 X2 W#define S22 9
#define S23 14
, Q& B! C2 y9 Y: O" |#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
0 c) e0 ]! T) F, X5 E#define S41 6
( E% r9 c8 O. b) \#define S42 10
#define S43 15
5 X$ B' r2 u; n* g#define S44 21
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/ t0 \$ r! h, C9 W$ }; O: I$ f8 ?) vstatic 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));
9 F7 ]' u6 v. y, x# B( X& Ystatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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. Q7 W' Y1 o" E4 u, F' Mstatic 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
};

( b9 C$ F+ b0 Y: t( i9 F; I' }0 a/* 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)))
; B4 b O0 i( q4 o#define H(x, y, z) ((x) ^ (y) ^ (z))
. ^2 z. y! h7 }$ B, e" \#define I(x, y, z) ((y) ^ ((x) | (~z)))
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7 a5 u5 m. G4 T9 k0 W, c/* ROTATE_LEFT rotates x left n bits.
*/
* |' @4 i" L% g: R. m, X4 Y#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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9 t, w; E! o6 E. w. p! r' @: q/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
+ e0 l- _5 x& S5 L& r. cRotation is separate from addition to prevent recomputation.
*/
1 v# z& O/ Y( G, D) E1 m#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 }0 n1 Z$ W% G& Q/ b9 E2 T#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); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
6 F6 w& s0 @' y* nvoid 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;
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
/ n" ^+ ^0 z9 h" x3 g9 V6 Ovoid MD5Update (context, input, inputLen)
1 E9 _6 z) _5 F, TMD5_CTX *context; /* context */
7 J9 G3 x* W2 P g1 Z- ~5 D: \unsigned char *input; /* input block */
unsigned 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);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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