md5加密算法C++程序

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#include "global.h"
7 \* C/ k8 D- ]) y* f' S! n4 l#include "md5.h"
6 t; H1 D( Q- w) P& h! S [# x* F
& L! h3 g+ X* B. C7 h% y$ I/* Constants for MD5Transform routine.
*/
( } V7 v/ i' ? Q: p: i3 u: G' ^

8 F4 z5 E0 [, l& F1 @5 x#define S11 7
% I6 Y3 P& r7 o0 B/ F+ z) b#define S12 12
K% @* k; G \( k#define S13 17
" V1 t; E% o' F6 o#define S14 22
#define S21 5
#define S22 9
8 ?1 O0 G2 A; }- ?* L {4 h# p2 W#define S23 14
! C M: \0 `2 H9 I# q#define S24 20
% N( W/ j& e/ ^+ h; D3 V$ X; q( _#define S31 4
#define S32 11
#define S33 16
8 q3 C* N! v0 X$ P1 y2 `" z0 ^! t#define S34 23
#define S41 6
#define S42 10
#define S43 15
0 b! b/ H7 }% Q/ y( ^#define S44 21

static 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));
9 t6 H1 |1 C; z2 Q4 I3 S+ E( ]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
};

- U2 r' ]7 i' P) Y0 \/* F, G, H and I are basic MD5 functions.
*/
$ }: v, @6 _8 m9 F& a#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
+ U2 W) [$ ^9 ?4 [ t4 O1 G#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
3 k& m$ Q- x1 @' v! _#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* 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.
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); \
}
/ z. `* q5 B3 z#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
# S* C( P6 f7 U6 t/ M) Q#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.
*/
! X- b' O3 _9 I$ d9 s. | `& Y9 [8 kvoid MD5Init (context)
/ j2 `- N& d* b1 V% g3 i+ LMD5_CTX *context; /* context */
{
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;
: B( v3 l/ [ p/ Z6 B6 z}

T! z: ?3 Q/ w/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
# V; K, Q0 i- S& E6 _3 L& Hvoid MD5Update (context, input, inputLen)
# {, n1 w9 N+ h1 Y1 a1 ?- hMD5_CTX *context; /* context */
Z% a& L/ _" s! {9 p3 j- zunsigned char *input; /* input block */
7 I2 [/ e* i$ O+ H6 f. kunsigned int inputLen; /* length of input block */
4 X7 M, U8 \* w! m# ]3 e{
unsigned int i, index, partLen;
5 N4 [2 N1 T3 ]- ^, \
/* 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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