#include "StdAfx.h"
#include "MD5.h"
/* constants for md5transform routine.*/
#define s11 7
#define s12 12
#define s13 17
#define s14 22
#define s21 5
#define s22 9
#define s23 14
#define s24 20
#define s31 4
#define s32 11
#define s33 16
#define s34 23
#define s41 6
#define s42 10
#define s43 15
#define s44 21
/* f, g, h and i are basic md5 functions.*/
#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))
#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) + (unsigned long int)(ac); \
(a) = Rotate_Left ((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
(a) = Rotate_Left ((a), (s)); \
(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
(a) = Rotate_Left ((a), (s)); \
(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
(a) = Rotate_Left ((a), (s)); \
(a) += (b); \
}
using namespace std;
/* md5 initialization. begins an md5 operation, writing a new context.*/
CMD5::CMD5()
{
MD5Init();
}
CMD5::~CMD5()
{
}
void CMD5::MD5Init ()
{
this->count[0] = this->count[1] = 0;
/* load magic initialization constants.*/
this->state[0] = 0x67452301;
this->state[1] = 0xefcdab89;
this->state[2] = 0x98badcfe;
this->state[3] = 0x10325476;
/* add by liguangyi */
MD5_Memset(padding, 0, sizeof(padding));
*padding=0x80;
}
/* md5 block update operation. continues an md5 message-digest operation, processing another message block, and updating thecontext.*/
void CMD5::MD5Update (unsigned char *input,unsigned int inputlen)
{
unsigned int i, index, partlen;
/* compute number of bytes mod 64 */
index = (unsigned int)((this->count[0] >> 3) & 0x3f);
/* update number of bits */
if ((this->count[0] += ((unsigned long int)inputlen << 3)) < ((unsigned long int)inputlen << 3))
this->count[1]++;
this->count[1] += ((unsigned long int)inputlen >> 29);
partlen = 64 - index;
/* transform as many times as possible. */
if (inputlen >= partlen)
{
MD5_Memcpy((unsigned char*)&this->buffer[index],(unsigned char*)input, partlen);
MD5Transform (this->state, this->buffer);
for (i = partlen; i + 63 < inputlen; i += 64)
MD5Transform (this->state, &input[i]);
index = 0;
}
else
i = 0;
/* buffer remaining input */
MD5_Memcpy ((unsigned char*)&this->buffer[index], (unsigned char*)&input[i],inputlen-i);
}
/* md5 finalization. ends an md5 message-digest operation, writing thethe message digest and zeroizing the context.*/
void CMD5::MD5Final (unsigned char digest[16])
{
unsigned char bits[8];
unsigned int index, padlen;
/* save number of bits */
Encode (bits, this->count, 8);
/* pad out to 56 mod 64.*/
index = (unsigned int)((this->count[0] >> 3) & 0x3f);
padlen = (index < 56) ? (56 - index) : (120 - index);
MD5Update ( padding, padlen);
/* append length (before padding) */
MD5Update (bits, 8);
/* store state in digest */
Encode (digest, this->state, 16);
/* zeroize sensitive information.*/
MD5_Memset ((unsigned char*)this, 0, sizeof (*this));
this->MD5Init();
}
/* md5 basic transformation. transforms state based on block.*/
void CMD5::MD5Transform (unsigned long int state[4], unsigned char block[64])
{
unsigned long int a = state[0], b = state[1], c = state[2], d = state[3], x[16];
Decode (x, block, 64);
/* round 1 */
FF (a, b, c, d, x[ 0], s11, 0xd76aa478); /* 1 */
FF (d, a, b, c, x[ 1], s12, 0xe8c7b756); /* 2 */
FF (c, d, a, b, x[ 2], s13, 0x242070db); /* 3 */
FF (b, c, d, a, x[ 3], s14, 0xc1bdceee); /* 4 */
FF (a, b, c, d, x[ 4], s11, 0xf57c0faf); /* 5 */
FF (d, a, b, c, x[ 5], s12, 0x4787c62a); /* 6 */
FF (c, d, a, b, x[ 6], s13, 0xa8304613); /* 7 */
FF (b, c, d, a, x[ 7], s14, 0xfd469501); /* 8 */
FF (a, b, c, d, x[ 8], s11, 0x698098d8); /* 9 */
FF (d, a, b, c, x[ 9], s12, 0x8b44f7af); /* 10 */
FF (c, d, a, b, x[10], s13, 0xffff5bb1); /* 11 */
FF (b, c, d, a, x[11], s14, 0x895cd7be); /* 12 */
FF (a, b, c, d, x[12], s11, 0x6b901122); /* 13 */
FF (d, a, b, c, x[13], s12, 0xfd987193); /* 14 */
FF (c, d, a, b, x[14], s13, 0xa679438e); /* 15 */
FF (b, c, d, a, x[15], s14, 0x49b40821); /* 16 */
/* round 2 */
GG (a, b, c, d, x[ 1], s21, 0xf61e2562); /* 17 */
GG (d, a, b, c, x[ 6], s22, 0xc040b340); /* 18 */
GG (c, d, a, b, x[11], s23, 0x265e5a51); /* 19 */
GG (b, c, d, a, x[ 0], s24, 0xe9b6c7aa); /* 20 */
GG (a, b, c, d, x[ 5], s21, 0xd62f105d); /* 21 */
GG (d, a, b, c, x[10], s22, 0x2441453); /* 22 */
GG (c, d, a, b, x[15], s23, 0xd8a1e681); /* 23 */
GG (b, c, d, a, x[ 4], s24, 0xe7d3fbc8); /* 24 */
GG (a, b, c, d, x[ 9], s21, 0x21e1cde6); /* 25 */
GG (d, a, b, c, x[14], s22, 0xc33707d6); /* 26 */
GG (c, d, a, b, x[ 3], s23, 0xf4d50d87); /* 27 */
GG (b, c, d, a, x[ 8], s24, 0x455a14ed); /* 28 */
GG (a, b, c, d, x[13], s21, 0xa9e3e905); /* 29 */
GG (d, a, b, c, x[ 2], s22, 0xfcefa3f8); /* 30 */
GG (c, d, a, b, x[ 7], s23, 0x676f02d9); /* 31 */
GG (b, c, d, a, x[12], s24, 0x8d2a4c8a); /* 32 */
/* round 3 */
HH (a, b, c, d, x[ 5], s31, 0xfffa3942); /* 33 */
HH (d, a, b, c, x[ 8], s32, 0x8771f681); /* 34 */
HH (c, d, a, b, x[11], s33, 0x6d9d6122); /* 35 */
HH (b, c, d, a, x[14], s34, 0xfde5380c); /* 36 */
HH (a, b, c, d, x[ 1], s31, 0xa4beea44); /* 37 */
HH (d, a, b, c, x[ 4], s32, 0x4bdecfa9); /* 38 */
HH (c, d, a, b, x[ 7], s33, 0xf6bb4b60); /* 39 */
HH (b, c, d, a, x[10], s34, 0xbebfbc70); /* 40 */
HH (a, b, c, d, x[13], s31, 0x289b7ec6); /* 41 */
HH (d, a, b, c, x[ 0], s32, 0xeaa127fa); /* 42 */
HH (c, d, a, b, x[ 3], s33, 0xd4ef3085); /* 43 */
HH (b, c, d, a, x[ 6], s34, 0x4881d05); /* 44 */
HH (a, b, c, d, x[ 9], s31, 0xd9d4d039); /* 45 */
HH (d, a, b, c, x[12], s32, 0xe6db99e5); /* 46 */
HH (c, d, a, b, x[15], s33, 0x1fa27cf8); /* 47 */
HH (b, c, d, a, x[ 2], s34, 0xc4ac5665); /* 48 */
/* round 4 */
II (a, b, c, d, x[ 0], s41, 0xf4292244); /* 49 */
II (d, a, b, c, x[ 7], s42, 0x432aff97); /* 50 */
II (c, d, a, b, x[14], s43, 0xab9423a7); /* 51 */
II (b, c, d, a, x[ 5], s44, 0xfc93a039); /* 52 */
II (a, b, c, d, x[12], s41, 0x655b59c3); /* 53 */
II (d, a, b, c, x[ 3], s42, 0x8f0ccc92); /* 54 */
II (c, d, a, b, x[10], s43, 0xffeff47d); /* 55 */
II (b, c, d, a, x[ 1], s44, 0x85845dd1); /* 56 */
II (a, b, c, d, x[ 8], s41, 0x6fa87e4f); /* 57 */
II (d, a, b, c, x[15], s42, 0xfe2ce6e0); /* 58 */
II (c, d, a, b, x[ 6], s43, 0xa3014314); /* 59 */
II (b, c, d, a, x[13], s44, 0x4e0811a1); /* 60 */
II (a, b, c, d, x[ 4], s41, 0xf7537e82); /* 61 */
II (d, a, b, c, x[11], s42, 0xbd3af235); /* 62 */
II (c, d, a, b, x[ 2], s43, 0x2ad7d2bb); /* 63 */
II (b, c, d, a, x[ 9], s44, 0xeb86d391); /* 64 */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
/* zeroize sensitive information.*/
MD5_Memset ((unsigned char*)x, 0, sizeof (x));
}
/* encodes input (unsigned long int) into output (unsigned char). assumes len isa multiple of 4.*/
void CMD5::Encode (unsigned char *output, unsigned long int *input,unsigned int len)
{
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4)
{
output[j] = (unsigned char)(input[i] & 0xff);
output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
}
}
/* decodes input (unsigned char) into output (unsigned long int). assumes len
