md5加密算法C++程序

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#include "global.h"
3 N" r0 Q! U* e( p; Q3 J+ P#include "md5.h"
1 ?3 ]% e/ T6 N% C
& K4 Y- r; v0 \7 R+ o1 l4 ?! Z7 _/* Constants for MD5Transform routine.
*/

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#define S11 7
. o3 e. @: e7 m0 w5 U, y0 N#define S12 12
& a+ b5 Y( v" z4 ?: v, a#define S13 17
#define S14 22
, r7 P& F( ^1 C7 V" H. X( u1 J$ A#define S21 5
8 o! L" @* \$ M, R0 ]" F#define S22 9
#define S23 14
9 c2 v8 V0 o1 t3 O( r: s4 H$ E#define S24 20
#define S31 4
/ v) c* t( l. G; [( G( W8 a#define S32 11
#define S33 16
- q8 @& v. m2 v#define S34 23
" A. y: [4 ~, {6 ?5 g. H, D' T0 a! Y#define S41 6
#define S42 10
# Y, T3 D! r. q8 s& [% d#define S43 15
% j9 e9 L, V& E#define S44 21

* _$ H% p# ^: e% R+ n! ?static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
6 @+ t8 H3 ^2 C3 }% k& p5 \1 Dstatic 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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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
};
' m$ O; a! h5 ` }
/* F, G, H and I are basic MD5 functions.
*/
* |3 |8 B: J6 r9 S9 C, Q/ A: V. i#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
! Z. i$ }5 y2 n" b#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
( ?3 F: A0 \! u, p: {#define H(x, y, z) ((x) ^ (y) ^ (z))
& e$ X- w! p+ L2 b8 l+ E5 f; L$ S#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
! |4 j$ Y$ }7 e: H0 s#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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8 C6 B. C# D) e/ s7 m6 A1 n% F/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
/ S& z7 C; G& nRotation 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); \
}
# k; B T) _9 M0 q" h& w2 I. m#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
E2 F- A6 a9 q e, E# j% d# a#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
* p O* u" b& O#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)
0 y4 I( g8 d2 s1 IMD5_CTX *context; /* context */
8 x3 D! ^( {: Y) H$ }' z# ]. 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;
, X2 W- J, y/ `" @: m- ^ ]4 F}
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( r. o& D; t' W/ U/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
! N9 h! @% ]3 F1 l& C& |MD5_CTX *context; /* context */
. g% Q+ a0 V) S8 x H; F; |7 punsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
$ \3 ~4 v) B/ |{
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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