md5加密算法C++程序

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#include "global.h"
0 B7 Q4 r" e0 w5 N) a3 H% L#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
4 v1 k" d( v, K% ?. _' R4 I/ f#define S13 17
#define S14 22
+ s3 u' f, K! T& |2 B3 P" I#define S21 5
#define S22 9
#define S23 14
$ p# K8 ^0 o; I; v0 k# | E5 t#define S24 20
- H! `; d/ M) r% a#define S31 4
8 i2 v" s( Q* `8 o#define S32 11
; G/ g8 ~5 p3 d) [; c! ]#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
1 s' g6 B2 m# v0 ^1 a#define S44 21
# |1 z& p2 V! A% G
4 ~* r# d+ T+ e5 q- `+ e+ gstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
/ i! }+ d4 T9 w! \" h" Z$ Istatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
) Z% E8 m" P: U Pstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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( C0 H7 L* h- Z3 O* d1 C; _static 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
+ @5 s" n. F- R3 g. h};

/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
. n! t" t/ `8 j+ O+ M8 J$ ~) j6 B& C: f#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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; k! j1 L% ~" p$ R' C/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
- C% x( n; n+ ^ H% }0 n5 hRotation 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); \
}
) O, W) P6 G+ H; M6 L. x#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
; D8 @3 L% F/ \4 Z. b3 S8 \/ T Z#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.
*/
2 W. f, @( F7 y* C/ |, s9 _9 Uvoid MD5Init (context)
MD5_CTX *context; /* context */
3 k- B3 E& X: q! ?" Q5 k4 C{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
6 g4 l4 d3 {, h& d8 g! m" d9 W*/
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.
*/
$ y% Q- o. G! D8 ~7 ?void MD5Update (context, input, inputLen)
3 P" c3 D3 }% ]( ~6 X9 I& O/ d$ CMD5_CTX *context; /* context */
5 t ^9 ?" V- s1 E$ N/ h. m, sunsigned char *input; /* input block */
+ n' E4 o6 j# H ]unsigned int inputLen; /* length of input block */
% ~1 p! p; z" k+ }8 J{
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))
&

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