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# [mailto:mddelacruz1@myseneca.ca;elim2@myseneca.ca;mdafidchao@myseneca.ca?subject=GPU610 eMail All]
[[Media:== Proposal ==
=== Game of Life ===
The Game of Life is a "0 player game" cellular automaton. With an initial configuration,
</pre>
===MD5 Checksum Calculator===
The md5 checksum is a commonly used hash function that produces a 128-bit hash value commonly used to check data integrity. It is also used in a wide variety of security applications, however its use in checking data integrity is what will be explored in this assignment.
The full source code for the MD5 checksum calculator can be found here: [http://www.codeforge.com/article/91071]
===Profile===
The following result (external link) was found after attempting to generate the md5 checksum for a 6.4gb file (Windows Vista ISO):
[http://imgur.com/B34r9]
===Code Snippet===
From analysis of the above profile, the code to be targetted for optimization is the following:
<pre>
void _MD5_transform
(unsigned int state[4],
unsigned char block[64])
{
unsigned int lA = state[0], lB = state[1], lC = state[2], lD = state[3];
unsigned int x[16];
_MD5_decode (x, block, 64);
// round 1
FF ( lA, lB, lC, lD, x[ 0], S11, 0xd76aa478); // 1
FF ( lD, lA, lB, lC, x[ 1], S12, 0xe8c7b756); // 2
FF ( lC, lD, lA, lB, x[ 2], S13, 0x242070db); // 3
FF ( lB, lC, lD, lA, x[ 3], S14, 0xc1bdceee); // 4
FF ( lA, lB, lC, lD, x[ 4], S11, 0xf57c0faf); // 5
FF ( lD, lA, lB, lC, x[ 5], S12, 0x4787c62a); // 6
FF ( lC, lD, lA, lB, x[ 6], S13, 0xa8304613); // 7
FF ( lB, lC, lD, lA, x[ 7], S14, 0xfd469501); // 8
FF ( lA, lB, lC, lD, x[ 8], S11, 0x698098d8); // 9
FF ( lD, lA, lB, lC, x[ 9], S12, 0x8b44f7af); // 10
FF ( lC, lD, lA, lB, x[10], S13, 0xffff5bb1); // 11
FF ( lB, lC, lD, lA, x[11], S14, 0x895cd7be); // 12
FF ( lA, lB, lC, lD, x[12], S11, 0x6b901122); // 13
FF ( lD, lA, lB, lC, x[13], S12, 0xfd987193); // 14
FF ( lC, lD, lA, lB, x[14], S13, 0xa679438e); // 15
FF ( lB, lC, lD, lA, x[15], S14, 0x49b40821); // 16
// round 2
GG ( lA, lB, lC, lD, x[ 1], S21, 0xf61e2562); // 17
GG ( lD, lA, lB, lC, x[ 6], S22, 0xc040b340); // 18
GG ( lC, lD, lA, lB, x[11], S23, 0x265e5a51); // 19
GG ( lB, lC, lD, lA, x[ 0], S24, 0xe9b6c7aa); // 20
GG ( lA, lB, lC, lD, x[ 5], S21, 0xd62f105d); // 21
GG ( lD, lA, lB, lC, x[10], S22, 0x2441453); // 22
GG ( lC, lD, lA, lB, x[15], S23, 0xd8a1e681); // 23
GG ( lB, lC, lD, lA, x[ 4], S24, 0xe7d3fbc8); // 24
GG ( lA, lB, lC, lD, x[ 9], S21, 0x21e1cde6); // 25
GG ( lD, lA, lB, lC, x[14], S22, 0xc33707d6); // 26
GG ( lC, lD, lA, lB, x[ 3], S23, 0xf4d50d87); // 27
GG ( lB, lC, lD, lA, x[ 8], S24, 0x455a14ed); // 28
GG ( lA, lB, lC, lD, x[13], S21, 0xa9e3e905); // 29
GG ( lD, lA, lB, lC, x[ 2], S22, 0xfcefa3f8); // 30
GG ( lC, lD, lA, lB, x[ 7], S23, 0x676f02d9); // 31
GG ( lB, lC, lD, lA, x[12], S24, 0x8d2a4c8a); // 32
// round 3
HH ( lA, lB, lC, lD, x[ 5], S31, 0xfffa3942); // 33
HH ( lD, lA, lB, lC, x[ 8], S32, 0x8771f681); // 34
HH ( lC, lD, lA, lB, x[11], S33, 0x6d9d6122); // 35
HH ( lB, lC, lD, lA, x[14], S34, 0xfde5380c); // 36
HH ( lA, lB, lC, lD, x[ 1], S31, 0xa4beea44); // 37
HH ( lD, lA, lB, lC, x[ 4], S32, 0x4bdecfa9); // 38
HH ( lC, lD, lA, lB, x[ 7], S33, 0xf6bb4b60); // 39
HH ( lB, lC, lD, lA, x[10], S34, 0xbebfbc70); // 40
HH ( lA, lB, lC, lD, x[13], S31, 0x289b7ec6); // 41
HH ( lD, lA, lB, lC, x[ 0], S32, 0xeaa127fa); // 42
HH ( lC, lD, lA, lB, x[ 3], S33, 0xd4ef3085); // 43
HH ( lB, lC, lD, lA, x[ 6], S34, 0x4881d05); // 44
HH ( lA, lB, lC, lD, x[ 9], S31, 0xd9d4d039); // 45
HH ( lD, lA, lB, lC, x[12], S32, 0xe6db99e5); // 46
HH ( lC, lD, lA, lB, x[15], S33, 0x1fa27cf8); // 47
HH ( lB, lC, lD, lA, x[ 2], S34, 0xc4ac5665); // 48
// round 4
II ( lA, lB, lC, lD, x[ 0], S41, 0xf4292244); // 49
II ( lD, lA, lB, lC, x[ 7], S42, 0x432aff97); // 50
II ( lC, lD, lA, lB, x[14], S43, 0xab9423a7); // 51
II ( lB, lC, lD, lA, x[ 5], S44, 0xfc93a039); // 52
II ( lA, lB, lC, lD, x[12], S41, 0x655b59c3); // 53
II ( lD, lA, lB, lC, x[ 3], S42, 0x8f0ccc92); // 54
II ( lC, lD, lA, lB, x[10], S43, 0xffeff47d); // 55
II ( lB, lC, lD, lA, x[ 1], S44, 0x85845dd1); // 56
II ( lA, lB, lC, lD, x[ 8], S41, 0x6fa87e4f); // 57
II ( lD, lA, lB, lC, x[15], S42, 0xfe2ce6e0); // 58
II ( lC, lD, lA, lB, x[ 6], S43, 0xa3014314); // 59
II ( lB, lC, lD, lA, x[13], S44, 0x4e0811a1); // 60
II ( lA, lB, lC, lD, x[ 4], S41, 0xf7537e82); // 61
II ( lD, lA, lB, lC, x[11], S42, 0xbd3af235); // 62
II ( lC, lD, lA, lB, x[ 2], S43, 0x2ad7d2bb); // 63
II ( lB, lC, lD, lA, x[ 9], S44, 0xeb86d391); // 64
state[0] += lA;
state[1] += lB;
state[2] += lC;
state[3] += lD;
// lClear sensitive information
memset(x, 0, 16);
}
</pre>
== Instructor's Comments ==