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- #include "mymd5.h"
- static void Transform (UINT4 *, UINT4 *);
- static const unsigned char PADDING[64] =
- {
- 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
- };
- #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)))
- #if defined(FAST_MD5) && defined(__GNUC__) && defined(mc68000)
- inline UINT4 ROTATE_LEFT(UINT4 x, int n)
- {
- asm("roll %2,%0" : "=d" (x) : "0" (x), "Ir" (n));
- return x;
- }
- #else
- #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
- #endif
- #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); \
- }
- #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); \
- }
- void MD5Init(MD5_CTX *mdContext)
- {
- mdContext->i[0] = mdContext->i[1] = (UINT4)0;
-
- mdContext->buf[0] = (UINT4)0x67452301;
- mdContext->buf[1] = (UINT4)0xefcdab89;
- mdContext->buf[2] = (UINT4)0x98badcfe;
- mdContext->buf[3] = (UINT4)0x10325476;
- }
- void MD5Update(MD5_CTX *mdContext, unsigned const char *inBuf, unsigned int inLen)
- {
- UINT4 in[16];
- int mdi;
- unsigned int i, ii;
-
- mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
-
- if ((mdContext->i[0] + ((UINT4)inLen << 3)) < mdContext->i[0])
- {
- mdContext->i[1]++;
- }
- mdContext->i[0] += ((UINT4)inLen << 3);
- mdContext->i[1] += ((UINT4)inLen >> 29);
- while (inLen--)
- {
-
- mdContext->in[mdi++] = *inBuf++;
-
- if (mdi == 0x40)
- {
- for (i = 0, ii = 0; i < 16; i++, ii += 4)
- in[i] = (((UINT4)mdContext->in[ii + 3]) << 24) |
- (((UINT4)mdContext->in[ii + 2]) << 16) |
- (((UINT4)mdContext->in[ii + 1]) << 8) |
- ((UINT4)mdContext->in[ii]);
- Transform (mdContext->buf, in);
- mdi = 0;
- }
- }
- }
- void MD5Final(MD5_CTX *mdContext)
- {
- UINT4 in[16];
- int mdi;
- unsigned int i, ii;
- unsigned int padLen;
-
- in[14] = mdContext->i[0];
- in[15] = mdContext->i[1];
-
- mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
-
- padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
- MD5Update (mdContext, PADDING, padLen);
-
- for (i = 0, ii = 0; i < 14; i++, ii += 4)
- in[i] = (((UINT4)mdContext->in[ii + 3]) << 24) |
- (((UINT4)mdContext->in[ii + 2]) << 16) |
- (((UINT4)mdContext->in[ii + 1]) << 8) |
- ((UINT4)mdContext->in[ii]);
- Transform (mdContext->buf, in);
-
- for (i = 0, ii = 0; i < 4; i++, ii += 4)
- {
- mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
- mdContext->digest[ii + 1] =
- (unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
- mdContext->digest[ii + 2] =
- (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
- mdContext->digest[ii + 3] =
- (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
- }
- }
- static void Transform (UINT4 *buf, UINT4 *in)
- {
- UINT4 a = buf[0], b = buf[1], c = buf[2], d = buf[3];
-
- #define S11 7
- #define S12 12
- #define S13 17
- #define S14 22
- FF ( a, b, c, d, in[ 0], S11, 0xd76aa478);
- FF ( d, a, b, c, in[ 1], S12, 0xe8c7b756);
- FF ( c, d, a, b, in[ 2], S13, 0x242070db);
- FF ( b, c, d, a, in[ 3], S14, 0xc1bdceee);
- FF ( a, b, c, d, in[ 4], S11, 0xf57c0faf);
- FF ( d, a, b, c, in[ 5], S12, 0x4787c62a);
- FF ( c, d, a, b, in[ 6], S13, 0xa8304613);
- FF ( b, c, d, a, in[ 7], S14, 0xfd469501);
- FF ( a, b, c, d, in[ 8], S11, 0x698098d8);
- FF ( d, a, b, c, in[ 9], S12, 0x8b44f7af);
- FF ( c, d, a, b, in[10], S13, 0xffff5bb1);
- FF ( b, c, d, a, in[11], S14, 0x895cd7be);
- FF ( a, b, c, d, in[12], S11, 0x6b901122);
- FF ( d, a, b, c, in[13], S12, 0xfd987193);
- FF ( c, d, a, b, in[14], S13, 0xa679438e);
- FF ( b, c, d, a, in[15], S14, 0x49b40821);
-
- #define S21 5
- #define S22 9
- #define S23 14
- #define S24 20
- GG ( a, b, c, d, in[ 1], S21, 0xf61e2562);
- GG ( d, a, b, c, in[ 6], S22, 0xc040b340);
- GG ( c, d, a, b, in[11], S23, 0x265e5a51);
- GG ( b, c, d, a, in[ 0], S24, 0xe9b6c7aa);
- GG ( a, b, c, d, in[ 5], S21, 0xd62f105d);
- GG ( d, a, b, c, in[10], S22, 0x2441453);
- GG ( c, d, a, b, in[15], S23, 0xd8a1e681);
- GG ( b, c, d, a, in[ 4], S24, 0xe7d3fbc8);
- GG ( a, b, c, d, in[ 9], S21, 0x21e1cde6);
- GG ( d, a, b, c, in[14], S22, 0xc33707d6);
- GG ( c, d, a, b, in[ 3], S23, 0xf4d50d87);
- GG ( b, c, d, a, in[ 8], S24, 0x455a14ed);
- GG ( a, b, c, d, in[13], S21, 0xa9e3e905);
- GG ( d, a, b, c, in[ 2], S22, 0xfcefa3f8);
- GG ( c, d, a, b, in[ 7], S23, 0x676f02d9);
- GG ( b, c, d, a, in[12], S24, 0x8d2a4c8a);
-
- #define S31 4
- #define S32 11
- #define S33 16
- #define S34 23
- HH ( a, b, c, d, in[ 5], S31, 0xfffa3942);
- HH ( d, a, b, c, in[ 8], S32, 0x8771f681);
- HH ( c, d, a, b, in[11], S33, 0x6d9d6122);
- HH ( b, c, d, a, in[14], S34, 0xfde5380c);
- HH ( a, b, c, d, in[ 1], S31, 0xa4beea44);
- HH ( d, a, b, c, in[ 4], S32, 0x4bdecfa9);
- HH ( c, d, a, b, in[ 7], S33, 0xf6bb4b60);
- HH ( b, c, d, a, in[10], S34, 0xbebfbc70);
- HH ( a, b, c, d, in[13], S31, 0x289b7ec6);
- HH ( d, a, b, c, in[ 0], S32, 0xeaa127fa);
- HH ( c, d, a, b, in[ 3], S33, 0xd4ef3085);
- HH ( b, c, d, a, in[ 6], S34, 0x4881d05);
- HH ( a, b, c, d, in[ 9], S31, 0xd9d4d039);
- HH ( d, a, b, c, in[12], S32, 0xe6db99e5);
- HH ( c, d, a, b, in[15], S33, 0x1fa27cf8);
- HH ( b, c, d, a, in[ 2], S34, 0xc4ac5665);
-
- #define S41 6
- #define S42 10
- #define S43 15
- #define S44 21
- II ( a, b, c, d, in[ 0], S41, 0xf4292244);
- II ( d, a, b, c, in[ 7], S42, 0x432aff97);
- II ( c, d, a, b, in[14], S43, 0xab9423a7);
- II ( b, c, d, a, in[ 5], S44, 0xfc93a039);
- II ( a, b, c, d, in[12], S41, 0x655b59c3);
- II ( d, a, b, c, in[ 3], S42, 0x8f0ccc92);
- II ( c, d, a, b, in[10], S43, 0xffeff47d);
- II ( b, c, d, a, in[ 1], S44, 0x85845dd1);
- II ( a, b, c, d, in[ 8], S41, 0x6fa87e4f);
- II ( d, a, b, c, in[15], S42, 0xfe2ce6e0);
- II ( c, d, a, b, in[ 6], S43, 0xa3014314);
- II ( b, c, d, a, in[13], S44, 0x4e0811a1);
- II ( a, b, c, d, in[ 4], S41, 0xf7537e82);
- II ( d, a, b, c, in[11], S42, 0xbd3af235);
- II ( c, d, a, b, in[ 2], S43, 0x2ad7d2bb);
- II ( b, c, d, a, in[ 9], S44, 0xeb86d391);
- buf[0] += a;
- buf[1] += b;
- buf[2] += c;
- buf[3] += d;
- }
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