md5加密算法C++程序

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#include "global.h"
5 o2 p7 n; X" C7 d" [0 }#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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t5 k( K% z1 t#define S11 7
! {" Q3 q; _( u/ H' o' A! ~#define S12 12
#define S13 17
: R. i; k1 P9 L! N. t+ v#define S14 22
#define S21 5
/ u& {6 T# ~) E0 Q3 Z#define S22 9
6 q: R6 i* W, F4 o' G#define S23 14
9 W* r J$ ~8 N5 l3 a& _+ i#define S24 20
#define S31 4
2 P8 z8 r- V* `# r#define S32 11
7 f; W- ?7 L* n6 _#define S33 16
% ~+ L. D+ w5 E- m; U#define S34 23
3 a" I: Q# l' l, n- e0 p% d#define S41 6
+ V8 A' v% J2 p/ K2 @- ?- z9 N#define S42 10
8 R$ y5 E* {0 q3 N" o0 M% L#define S43 15
" D' o+ \! F# m#define S44 21

3 D7 l0 K9 b, N* x9 ^static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
, |: |$ Y; M! k# K* Q [0 Estatic 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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( G) W; b: r- ^. r+ T/ Sstatic 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
) |, v' S7 t& }6 Z/ M5 Z. i};
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/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
1 _2 `" B4 u# p+ L* z#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
) a) f6 u4 g q1 [8 r+ q1 F4 A7 H' `#define H(x, y, z) ((x) ^ (y) ^ (z))
% @/ c7 h" C& ]9 b6 l$ }! v3 r, l#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))))

+ d* k1 [ K- J2 m Q1 N+ o/* 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); \
}
5 l2 _9 i* I$ j% Y/ x#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.
*/
void 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;
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/* 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 */
unsigned char *input; /* input block */
, ^( X5 D% f M: p/ q! M. f( vunsigned 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);

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

guoyun786

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