md5加密算法C++程序

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#include "global.h"
8 }( c5 ~: L' w; ? O, e. \0 H. ~#include "md5.h"

5 z+ Y& k( K1 d5 _) P* q0 ]/* Constants for MD5Transform routine.
*/
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& k# d4 S1 g5 C: m+ H#define S11 7
; q3 r$ B, R6 L8 }$ ?& {#define S12 12
#define S13 17
" q$ g' d. D6 s8 j/ X8 A#define S14 22
#define S21 5
#define S22 9
#define S23 14
: Z' n$ A0 m4 W# K- _7 i X#define S24 20
#define S31 4
1 f$ ^) I. H+ r& x0 L' B#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
; l) z0 G' i3 z5 z3 D#define S43 15
* [# h8 G6 V. w5 S#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
$ u( I5 I+ I; p" F/ nstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
G2 |) A5 }$ i) ?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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) r* C3 E* q; h ~9 J. G9 qstatic 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
2 A7 E2 T; |6 A5 z; N6 z! L};

8 D8 ~3 {3 _" v: z0 b/* F, G, H and I are basic MD5 functions.
*/
4 I/ w) K* r& s#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
# v% @2 [% Y+ c& q#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
1 R: D$ a' _, l( I: B: u6 J J#define I(x, y, z) ((y) ^ ((x) | (~z)))
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7 f+ Q. ?& B/ ]2 K, f, y" o/* ROTATE_LEFT rotates x left n bits.
*/
. r3 \4 P' Z, P1 C$ T* u#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

' z" H# e" {) ~2 Q4 M/* 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); \
}
- Y+ S6 }7 x1 Q#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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3 o4 r- u" c9 B/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
( }! D1 E' y- z8 S+ cvoid MD5Init (context)
( @: z5 f! g& c5 J3 d9 {, G' UMD5_CTX *context; /* context */
+ [0 c, L8 u/ f+ D{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
0 L$ Y/ _1 G( _! K9 H# U* }*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

; [7 e" d/ {, V/ G* e+ R5 ]/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
, }, J$ [+ z. j6 E) Yvoid MD5Update (context, input, inputLen)
$ r8 D7 f* \1 \- S6 ?/ FMD5_CTX *context; /* context */
* Z, |2 T2 `; a2 p" _unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
; I% Z& j [# U; }4 s3 y$ o1 }{
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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