md5加密算法C++程序

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#include "global.h"
' f2 C6 [- w* f% E" X7 D#include "md5.h"
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/* Constants for MD5Transform routine.
*/


3 J2 W) c% x3 q5 \# f8 r+ |#define S11 7
0 X6 H% A; {0 t& u3 X% x1 j#define S12 12
' L. K' ]9 M# j8 S) \#define S13 17
( [# n7 W7 P( v$ j Q8 @6 G4 q. _#define S14 22
#define S21 5
#define S22 9
5 q4 l$ i. O, s2 I; i' C0 Q: r: |#define S23 14
1 h& t0 A) h- B#define S24 20
- M* ^0 Y, P* H1 y7 O/ d#define S31 4
1 C( }! y4 Y% G+ R) w9 X#define S32 11
3 ]% w$ O1 A( I5 I' P8 f3 g#define S33 16
#define S34 23
#define S41 6
4 H1 y: X! x2 J$ i N#define S42 10
) @9 O( F/ h4 h0 t( ~. }( D#define S43 15
#define S44 21

9 E5 ^2 b- \2 G: A7 s. ~static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
! K9 D5 u( e% B* hstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
/ U0 v: q/ Z! sstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
1 }$ K) t- }) U2 d/ q. lstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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/ D7 }1 G2 y% v! \: Xstatic 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
};

/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
1 I" L6 o \7 z! c#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#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))))
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/* 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); \
}
" `% G2 P, H$ \2 Z5 g#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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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
% T# v) J1 L, t o' ^* b8 ~MD5_CTX *context; /* context */
+ ~1 s4 d/ i1 Y! R4 N{
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)
+ S" [" z% p4 PMD5_CTX *context; /* context */
unsigned char *input; /* input block */
8 X6 {- f# X# Y8 r& lunsigned int inputLen; /* length of input block */
- F1 D1 F, K9 x! M# d% A{
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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