Alien-SVN
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src/subversion/subversion/libsvn_subr/pseudo_md5.c view on Meta::CPAN
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (apr_uint32_t)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (apr_uint32_t)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (apr_uint32_t)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
/* The idea of the functions below is as follows:
*
* - The core MD5 algorithm does not assume that the "important" data
* is at the begin of the encryption block, followed by e.g. 0.
* Instead, all bits are equally relevant.
*
* - If some bytes in the input are known to be 0, we may hard-code them.
* With the previous property, it is safe to move them to the upper end
* of the encryption block to maximize the number of steps that can be
* pre-calculated.
*
* - Variable-length streams will use the upper 8 byte of the last
* encryption block to store the stream length in bits (to make 0, 00,
* 000, ... etc. produce different hash sums).
*
* - We will hash at most 63 bytes, i.e. 504 bits. In the standard stream
* implementation, the upper 6 bytes of the last encryption block would
* be 0. We will put at least one non-NULL value in the last 4 bytes.
* Therefore, our input will always be different to a standard MD5 stream
* implementation in either block count, content or both.
*
* - Our length indicator also varies with the number bytes in the input.
* Hence, different pseudo-MD5 input length produces different output
* (with "cryptographic probability") even if the content is all 0 or
* otherwise identical.
*
* - Collisions between pseudo-MD5 and pseudo-MD5 as well as pseudo-MD5
* and standard MD5 are as likely as any other MD5 collision.
*/
void svn__pseudo_md5_15(apr_uint32_t digest[4],
const apr_uint32_t x[4])
{
apr_uint32_t a = 0x67452301;
apr_uint32_t b = 0xefcdab89;
apr_uint32_t c = 0x98badcfe;
apr_uint32_t d = 0x10325476;
/* make sure byte 63 gets the marker independently of BE / LE */
apr_uint32_t x3n = x[3] ^ 0xffffffff;
/* Round 1 */
FF(a, b, c, d, 0, S11, 0xd76aa478); /* 1 */
FF(d, a, b, c, 0, S12, 0xe8c7b756); /* 2 */
FF(c, d, a, b, 0, S13, 0x242070db); /* 3 */
FF(b, c, d, a, 0, S14, 0xc1bdceee); /* 4 */
FF(a, b, c, d, 0, S11, 0xf57c0faf); /* 5 */
FF(d, a, b, c, 0, S12, 0x4787c62a); /* 6 */
FF(c, d, a, b, 0, S13, 0xa8304613); /* 7 */
FF(b, c, d, a, 0, S14, 0xfd469501); /* 8 */
FF(a, b, c, d, 0, S11, 0x698098d8); /* 9 */
FF(d, a, b, c, 0, S12, 0x8b44f7af); /* 10 */
FF(c, d, a, b, 0, S13, 0xffff5bb1); /* 11 */
FF(b, c, d, a, 0, S14, 0x895cd7be); /* 12 */
FF(a, b, c, d, x[0], S11, 0x6b901122); /* 13 */
FF(d, a, b, c, x[1], S12, 0xfd987193); /* 14 */
FF(c, d, a, b, x[2], S13, 0xa679438e); /* 15 */
FF(b, c, d, a, x3n, S14, 0x49b40821); /* 16 */
/* Round 2 */
GG(a, b, c, d, 0, S21, 0xf61e2562); /* 17 */
GG(d, a, b, c, 0, S22, 0xc040b340); /* 18 */
GG(c, d, a, b, 0, S23, 0x265e5a51); /* 19 */
GG(b, c, d, a, 0, S24, 0xe9b6c7aa); /* 20 */
GG(a, b, c, d, 0, S21, 0xd62f105d); /* 21 */
GG(d, a, b, c, 0, S22, 0x2441453); /* 22 */
GG(c, d, a, b, x3n, S23, 0xd8a1e681); /* 23 */
GG(b, c, d, a, 0, S24, 0xe7d3fbc8); /* 24 */
GG(a, b, c, d, 0, S21, 0x21e1cde6); /* 25 */
GG(d, a, b, c, x[2], S22, 0xc33707d6); /* 26 */
GG(c, d, a, b, 0, S23, 0xf4d50d87); /* 27 */
GG(b, c, d, a, 0, S24, 0x455a14ed); /* 28 */
GG(a, b, c, d, x[1], S21, 0xa9e3e905); /* 29 */
GG(d, a, b, c, 0, S22, 0xfcefa3f8); /* 30 */
GG(c, d, a, b, 0, S23, 0x676f02d9); /* 31 */
GG(b, c, d, a, x[0], S24, 0x8d2a4c8a); /* 32 */
/* Round 3 */
HH(a, b, c, d, 0, S31, 0xfffa3942); /* 33 */
HH(d, a, b, c, 0, S32, 0x8771f681); /* 34 */
HH(c, d, a, b, 0, S33, 0x6d9d6122); /* 35 */
HH(b, c, d, a, x[2], S34, 0xfde5380c); /* 36 */
HH(a, b, c, d, 0, S31, 0xa4beea44); /* 37 */
HH(d, a, b, c, 0, S32, 0x4bdecfa9); /* 38 */
HH(c, d, a, b, 0, S33, 0xf6bb4b60); /* 39 */
HH(b, c, d, a, 0, S34, 0xbebfbc70); /* 40 */
HH(a, b, c, d, x[1], S31, 0x289b7ec6); /* 41 */
HH(d, a, b, c, 0, S32, 0xeaa127fa); /* 42 */
HH(c, d, a, b, 0, S33, 0xd4ef3085); /* 43 */
HH(b, c, d, a, 0, S34, 0x4881d05); /* 44 */
HH(a, b, c, d, 0, S31, 0xd9d4d039); /* 45 */
HH(d, a, b, c, x[0], S32, 0xe6db99e5); /* 46 */
HH(c, d, a, b, x3n, S33, 0x1fa27cf8); /* 47 */
HH(b, c, d, a, 0, S34, 0xc4ac5665); /* 48 */
/* Round 4 */
II(a, b, c, d, 0, S41, 0xf4292244); /* 49 */
II(d, a, b, c, 0, S42, 0x432aff97); /* 50 */
II(c, d, a, b, x[2], S43, 0xab9423a7); /* 51 */
II(b, c, d, a, 0, S44, 0xfc93a039); /* 52 */
II(a, b, c, d, x[0], S41, 0x655b59c3); /* 53 */
II(d, a, b, c, 0, S42, 0x8f0ccc92); /* 54 */
II(c, d, a, b, 0, S43, 0xffeff47d); /* 55 */
II(b, c, d, a, 0, S44, 0x85845dd1); /* 56 */
II(a, b, c, d, 0, S41, 0x6fa87e4f); /* 57 */
II(d, a, b, c, x3n, S42, 0xfe2ce6e0); /* 58 */
II(c, d, a, b, 0, S43, 0xa3014314); /* 59 */
II(b, c, d, a, x[1], S44, 0x4e0811a1); /* 60 */
II(a, b, c, d, 0, S41, 0xf7537e82); /* 61 */
II(d, a, b, c, 0, S42, 0xbd3af235); /* 62 */
II(c, d, a, b, 0, S43, 0x2ad7d2bb); /* 63 */
II(b, c, d, a, 0, S44, 0xeb86d391); /* 64 */
digest[0] = a;
digest[1] = b;
digest[2] = c;
digest[3] = d;
}
void svn__pseudo_md5_31(apr_uint32_t digest[4],
const apr_uint32_t x[8])
{
apr_uint32_t a = 0x67452301;
apr_uint32_t b = 0xefcdab89;
apr_uint32_t c = 0x98badcfe;
apr_uint32_t d = 0x10325476;
/* make sure byte 63 gets the marker independently of BE / LE */
apr_uint32_t x7n = x[7] ^ 0xfefefefe;
/* Round 1 */
FF(a, b, c, d, 0, S11, 0xd76aa478); /* 1 */
FF(d, a, b, c, 0, S12, 0xe8c7b756); /* 2 */
FF(c, d, a, b, 0, S13, 0x242070db); /* 3 */
FF(b, c, d, a, 0, S14, 0xc1bdceee); /* 4 */
FF(a, b, c, d, 0, S11, 0xf57c0faf); /* 5 */
FF(d, a, b, c, 0, S12, 0x4787c62a); /* 6 */
FF(c, d, a, b, 0, S13, 0xa8304613); /* 7 */
FF(b, c, d, a, 0, S14, 0xfd469501); /* 8 */
FF(a, b, c, d, x[0], S11, 0x698098d8); /* 9 */
FF(d, a, b, c, x[1], S12, 0x8b44f7af); /* 10 */
FF(c, d, a, b, x[2], S13, 0xffff5bb1); /* 11 */
FF(b, c, d, a, x[3], S14, 0x895cd7be); /* 12 */
FF(a, b, c, d, x[4], S11, 0x6b901122); /* 13 */
FF(d, a, b, c, x[5], S12, 0xfd987193); /* 14 */
FF(c, d, a, b, x[6], S13, 0xa679438e); /* 15 */
FF(b, c, d, a, x7n, S14, 0x49b40821); /* 16 */
/* Round 2 */
GG(a, b, c, d, 0, S21, 0xf61e2562); /* 17 */
GG(d, a, b, c, 0, S22, 0xc040b340); /* 18 */
GG(c, d, a, b, x[3], S23, 0x265e5a51); /* 19 */
GG(b, c, d, a, 0, S24, 0xe9b6c7aa); /* 20 */
GG(a, b, c, d, 0, S21, 0xd62f105d); /* 21 */
GG(d, a, b, c, x[2], S22, 0x2441453); /* 22 */
GG(c, d, a, b, x7n, S23, 0xd8a1e681); /* 23 */
GG(b, c, d, a, 0, S24, 0xe7d3fbc8); /* 24 */
GG(a, b, c, d, x[1], S21, 0x21e1cde6); /* 25 */
GG(d, a, b, c, x[6], S22, 0xc33707d6); /* 26 */
GG(c, d, a, b, 0, S23, 0xf4d50d87); /* 27 */
GG(b, c, d, a, x[0], S24, 0x455a14ed); /* 28 */
GG(a, b, c, d, x[5], S21, 0xa9e3e905); /* 29 */
GG(d, a, b, c, 0, S22, 0xfcefa3f8); /* 30 */
GG(c, d, a, b, 0, S23, 0x676f02d9); /* 31 */
GG(b, c, d, a, x[4], S24, 0x8d2a4c8a); /* 32 */
/* Round 3 */
HH(a, b, c, d, 0, S31, 0xfffa3942); /* 33 */
HH(d, a, b, c, x[0], S32, 0x8771f681); /* 34 */
HH(c, d, a, b, x[3], S33, 0x6d9d6122); /* 35 */
HH(b, c, d, a, x[6], S34, 0xfde5380c); /* 36 */
HH(a, b, c, d, 0, S31, 0xa4beea44); /* 37 */
HH(d, a, b, c, 0, S32, 0x4bdecfa9); /* 38 */
HH(c, d, a, b, 0, S33, 0xf6bb4b60); /* 39 */
HH(b, c, d, a, x[2], S34, 0xbebfbc70); /* 40 */
HH(a, b, c, d, x[5], S31, 0x289b7ec6); /* 41 */
HH(d, a, b, c, 0, S32, 0xeaa127fa); /* 42 */
HH(c, d, a, b, 0, S33, 0xd4ef3085); /* 43 */
HH(b, c, d, a, 0, S34, 0x4881d05); /* 44 */
HH(a, b, c, d, x[1], S31, 0xd9d4d039); /* 45 */
HH(d, a, b, c, x[4], S32, 0xe6db99e5); /* 46 */
HH(c, d, a, b, x7n, S33, 0x1fa27cf8); /* 47 */
HH(b, c, d, a, 0, S34, 0xc4ac5665); /* 48 */
/* Round 4 */
II(a, b, c, d, 0, S41, 0xf4292244); /* 49 */
II(d, a, b, c, 0, S42, 0x432aff97); /* 50 */
II(c, d, a, b, x[6], S43, 0xab9423a7); /* 51 */
II(b, c, d, a, 0, S44, 0xfc93a039); /* 52 */
II(a, b, c, d, x[4], S41, 0x655b59c3); /* 53 */
II(d, a, b, c, 0, S42, 0x8f0ccc92); /* 54 */
II(c, d, a, b, x[2], S43, 0xffeff47d); /* 55 */
II(b, c, d, a, 0, S44, 0x85845dd1); /* 56 */
II(a, b, c, d, x[0], S41, 0x6fa87e4f); /* 57 */
II(d, a, b, c, x7n, S42, 0xfe2ce6e0); /* 58 */
II(c, d, a, b, 0, S43, 0xa3014314); /* 59 */
II(b, c, d, a, x[5], S44, 0x4e0811a1); /* 60 */
II(a, b, c, d, 0, S41, 0xf7537e82); /* 61 */
II(d, a, b, c, x[3], S42, 0xbd3af235); /* 62 */
II(c, d, a, b, 0, S43, 0x2ad7d2bb); /* 63 */
II(b, c, d, a, x[1], S44, 0xeb86d391); /* 64 */
digest[0] = a;
digest[1] = b;
digest[2] = c;
digest[3] = d;
}
void svn__pseudo_md5_63(apr_uint32_t digest[4],
const apr_uint32_t x[16])
{
apr_uint32_t a = 0x67452301;
apr_uint32_t b = 0xefcdab89;
apr_uint32_t c = 0x98badcfe;
apr_uint32_t d = 0x10325476;
/* make sure byte 63 gets the marker independently of BE / LE */
apr_uint32_t x15n = x[15] ^ 0xfcfcfcfc;
/* 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, x15n, 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, x15n, 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, x15n, 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, x15n, 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 */
digest[0] = a;
digest[1] = b;
digest[2] = c;
digest[3] = d;
}
( run in 1.081 second using v1.01-cache-2.11-cpan-13bb782fe5a )