md5加密算法C++程序

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#include "global.h"
x% R8 A+ }( `: U#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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* c- h3 @' ~, @5 K#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
- t, G$ A# E: ~, M( R1 ?* Q#define S22 9
#define S23 14
3 R7 B9 E0 K5 D/ C0 P4 i#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
, s! k, L! R0 z) M* f6 T( j* \#define S42 10
/ H6 ^7 L' l# ~2 t: l0 {0 v- \#define S43 15
9 A$ S% X) x6 A: C: A#define S44 21
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4 d4 }0 P; K. i& R2 z4 o5 q4 Ostatic 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));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
' @$ C0 Q ?" q( B9 Hstatic 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
};

* F- D1 h6 `0 K# N& \/* F, G, H and I are basic MD5 functions.
*/
4 { s7 F/ }1 _+ J e% n#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
4 Q# F* @8 p0 G' L0 T#define I(x, y, z) ((y) ^ ((x) | (~z)))

Y$ v. @$ h* P& p. j. ^$ A0 A/* ROTATE_LEFT rotates x left n bits.
*/
6 G) I( I' P+ Y' i#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

$ g1 _) V) a: ^, E0 n7 U/* 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); \
}
; L r( Q4 U" z2 S. \#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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1 B* l' k' n* u9 _: c" O1 j/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
5 |# V' n, X& B1 B, I7 D# lMD5_CTX *context; /* context */
1 I- G0 H) k n0 a7 e{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
. | M7 @( z2 f- a; f*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
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8 ~) |0 f" t' ^/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
0 b; }8 O" n' i+ @9 o( Ovoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
$ M' u6 o+ M) I9 G* s3 W, ounsigned char *input; /* input block */
. E2 X9 A% `1 g$ p$ D; x, I5 C Zunsigned 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);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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