md5加密算法C++程序

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#include "global.h"
E" N q3 |( Q6 o! h#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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z7 M0 J4 G6 l/ m
( Y+ \2 B# W6 c% d; p' F" n#define S11 7
% ]" Q; a8 n ~% J7 [7 f#define S12 12
#define S13 17
#define S14 22
#define S21 5
/ Y7 S- _* A5 F( p#define S22 9
#define S23 14
, Y- u3 T4 ~ j1 [, \1 w#define S24 20
9 ^' l0 A J$ u( Z#define S31 4
~; f8 T" m2 R/ ~ v8 {#define S32 11
#define S33 16
#define S34 23
+ F' C) y, [& ^, Z0 B |" u7 p#define S41 6
#define S42 10
# `& ^8 P( b" W# ` ~#define S43 15
0 Y* `" U: A1 @3 D: }#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
& |* K3 C5 D. x, E/ V3 H4 n* ^static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
, Z0 [. ]" @1 L, K) r$ Y# nstatic 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));

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
4 Z# X6 r8 \5 E9 x* T9 G};
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" D* ]3 z0 m, D. n5 l( F1 C/ r/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
& L- N" b- k# J/ n6 G#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
6 _2 O7 ^2 s( v1 q, v. X- S#define I(x, y, z) ((y) ^ ((x) | (~z)))

1 |! w% A6 T1 A+ `7 q4 P$ W6 d! u/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

* O, M% A3 ?: l8 E I% Q- Z/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
8 u+ l* Q. X' L5 D. pRotation is separate from addition to prevent recomputation.
*/
B% R, l2 t F! i1 r6 w#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
, e& ~% k' L; S8 w( o$ \! \#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.
*/
7 l c. S7 r# w' l U& k. ]7 u* Qvoid MD5Init (context)
) G: ?8 `4 O$ l# g6 TMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
# m" ]0 h' G" j. f& M*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
; ?/ W1 o' S& B" C7 e) x! a}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
& s7 N- A& X* NMD5_CTX *context; /* context */
$ o0 S9 L2 d4 A' {* Punsigned char *input; /* input block */
/ w5 y5 ^; Q* u1 U) G. ^unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;

/* 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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