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#include "global.h"
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#include "md5.h"
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$ y# v2 L1 V( S/* Constants for MD5Transform routine.
*/
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#define S11 7
" a) ?; F1 ~. C/ D4 k' G#define S12 12
2 \% M; Y" o4 _7 Y" G' e#define S13 17
0 z# ~- o& A; {9 P% U#define S14 22
`# d) C+ m3 v6 u5 L5 @#define S21 5
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#define S22 9
! P* X9 r* \2 O: z#define S23 14
7 B% F% Q- m% q1 m+ F#define S24 20
# k: g+ r) W1 _% h3 T#define S31 4
+ Y3 i! F; x, F#define S32 11
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#define S33 16
/ ?1 Y; U3 b0 Y$ j3 a! z3 r#define S34 23
& S- h0 L- F. [1 h#define S41 6
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#define S42 10
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#define S43 15
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#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
, M5 X4 a" @" k9 t0 ]static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
' A; m( b( v6 Y4 j, ]$ b0 k$ b; c% Xstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
0 D9 _- L& e7 v6 i+ u: I4 u* |' |static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
, O! J7 }! _6 ?! L: Qstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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/ M$ b4 j8 D9 m% |& k n) C7 w+ J1 Lstatic 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
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};
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/* F, G, H and I are basic MD5 functions.
*/
9 \" s. |" M" D* K#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
+ |* |& u8 P! D- z#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | (~z)))
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1 z# B5 ^: n. H2 \+ t7 c/* ROTATE_LEFT rotates x left n bits.
*/
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#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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Rotation is separate from addition to prevent recomputation.
*/
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#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
7 e B# ~* T+ `- S#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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#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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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
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void MD5Init (context)
$ F5 l9 D( H5 B+ F% ^MD5_CTX *context; /* context */
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context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
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*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
& X- D+ a% N4 D5 s2 C# U& Lvoid MD5Update (context, input, inputLen)
: a( b. i' a( I/ P! hMD5_CTX *context; /* context */
$ \: G. a2 J( Bunsigned char *input; /* input block */
2 T9 V& Z: J" V' e7 Funsigned int inputLen; /* length of input block */
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{
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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发表于 2004-11-26 20:11:20
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