md5加密算法C++程序

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#include "global.h"
& T2 p/ W$ c5 U/ u* H9 N% G( I#include "md5.h"
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/* Constants for MD5Transform routine.
*/


, j$ @: `* g* j) Y: \#define S11 7
#define S12 12
#define S13 17
. O7 _% H/ E. s; D% c1 ^' @#define S14 22
3 |( x4 R$ t- G. y. f% A#define S21 5
. C" Q( A8 T4 m( Q: |#define S22 9
' }, \1 ~7 |2 u3 a#define S23 14
#define S24 20
9 ~9 g5 c1 K9 p- g& }& t#define S31 4
#define S32 11
: W- d' T( C# v! n0 f) u6 {; @0 `#define S33 16
#define S34 23
) \) {) h8 }$ u9 Z, W+ Z& d9 {#define S41 6
7 |# H8 d% y7 R5 M- h9 i9 J9 u#define S42 10
; {* F% l* n- p/ G7 A8 w#define S43 15
#define S44 21
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# B: R; l& a4 c" F! tstatic 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 A( b7 Q# q" @0 a' H' }' Ostatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

% P2 J0 z$ g l! L3 Istatic 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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# a; {9 p' l* J: |5 S+ d/* F, G, H and I are basic MD5 functions.
*/
. r. B& ?8 p1 H( i# F#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
" {) P" F- O3 ]8 [; V#define H(x, y, z) ((x) ^ (y) ^ (z))
! Z; S$ m G3 ~- j#define I(x, y, z) ((y) ^ ((x) | (~z)))

+ C1 S) q# W# }' N9 I/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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3 A9 p4 T1 z L4 k6 v/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
. r% ~ V+ S" z- W- bRotation 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); \
}
+ K1 L3 b- i. }. @3 F( S0 @#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); \
}

' u& _3 V$ |9 Q+ z5 ~0 J/ _8 E/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
: e# o, v7 A3 T+ ~- B( z' \* y" pvoid MD5Init (context)
+ m7 y8 o& F; W) q' LMD5_CTX *context; /* context */
3 L/ ?* L+ y6 m! I; M) I5 G7 l& ?- o{
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;
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
& K2 |9 ^& D2 f- U; J& t! j8 gvoid MD5Update (context, input, inputLen)
, i; p7 f2 Y: P U5 [1 qMD5_CTX *context; /* context */
unsigned char *input; /* input block */
1 i1 p* ]5 M" M6 M' t+ n( Y; _unsigned 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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