md5加密算法C++程序

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#include "global.h"
#include "md5.h"

- G3 Y G6 R( Q/* Constants for MD5Transform routine.
*/
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#define S11 7
' z( V7 b' w5 z$ ]% K: C#define S12 12
! ^, E6 x" D. G+ B#define S13 17
1 W/ B! v r6 M/ f#define S14 22
- b; U: l- @1 p" J( t2 g, A! a#define S21 5
9 I; }, P5 O- V8 Y#define S22 9
#define S23 14
- L) g' u& d |* J; E: V#define S24 20
#define S31 4
* J4 L" y5 v3 \. S5 I) F6 c#define S32 11
#define S33 16
#define S34 23
! A+ C( B# \5 Q; N/ z2 ~#define S41 6
/ j4 T/ H) K% ~9 O1 t#define S42 10
& |! N' n" d( n1 b% a#define S43 15
#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));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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5 f9 [0 I2 L7 g6 Y% i* s* ~& qstatic 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
! y' B7 B7 X, k1 L; Y$ F0 y5 m};
& C4 H; _9 d0 p( M
/* F, G, H and I are basic MD5 functions.
*/
/ d' ?& B+ E! P3 I/ m#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
0 {! w: `3 B. C#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)))

) s6 x0 I, G# T( y0 W! ^3 W; @/* ROTATE_LEFT rotates x left n bits.
*/
' h p: W3 `0 r& }#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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2 V" e/ F% d0 ~6 t/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
) z8 c' l: j/ Y7 r) O#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
, M4 [* f* F1 k3 P/ g/ x#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); \
}
* L A6 s4 A2 V% G) w" }: y#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.
*/
2 _. _& J N8 y n; d0 z wvoid MD5Init (context)
MD5_CTX *context; /* context */
8 O+ D# u4 u8 a7 g3 E. ]+ {{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
" M9 I* Q2 ]: v1 m*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
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* p5 `5 ]; T8 _7 f5 p/ {8 @. D! r+ b/ Y/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
8 k: M6 b$ |3 e. ` z& M# Q# P2 Mvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
9 u+ H* c0 w+ F B, yunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
) v" F; x5 ]) b% d4 Z7 O- K; H, F{
unsigned int i, index, partLen;
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/* 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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