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73 lines
1.4 KiB
73 lines
1.4 KiB
// |
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// gettsc.inl |
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// |
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// gives access to the Pentium's (secret) cycle counter |
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// |
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// This software was written by Leonard Janke (janke@unixg.ubc.ca) |
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// in 1996-7 and is entered, by him, into the public domain. |
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#if defined(__WATCOMC__) |
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void GetTSC(unsigned long&); |
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#pragma aux GetTSC = 0x0f 0x31 "mov [edi], eax" parm [edi] modify [edx eax]; |
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#elif defined(__GNUC__) |
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inline |
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void GetTSC(unsigned long& tsc) |
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{ |
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asm volatile(".byte 15, 49\n\t" |
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: "=eax" (tsc) |
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: |
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: "%edx", "%eax"); |
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} |
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#elif defined(_MSC_VER) |
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inline |
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void GetTSC(unsigned long& tsc) |
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{ |
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unsigned long a; |
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__asm _emit 0fh |
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__asm _emit 31h |
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__asm mov a, eax; |
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tsc=a; |
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} |
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#endif |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <openssl/rc4.h> |
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void main(int argc,char *argv[]) |
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{ |
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unsigned char buffer[1024]; |
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RC4_KEY ctx; |
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unsigned long s1,s2,e1,e2; |
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unsigned char k[16]; |
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unsigned long data[2]; |
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unsigned char iv[8]; |
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int i,num=64,numm; |
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int j=0; |
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if (argc >= 2) |
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num=atoi(argv[1]); |
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if (num == 0) num=256; |
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if (num > 1024-16) num=1024-16; |
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numm=num+8; |
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for (j=0; j<6; j++) |
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{ |
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for (i=0; i<10; i++) /**/ |
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{ |
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RC4(&ctx,numm,buffer,buffer); |
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GetTSC(s1); |
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RC4(&ctx,numm,buffer,buffer); |
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GetTSC(e1); |
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GetTSC(s2); |
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RC4(&ctx,num,buffer,buffer); |
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GetTSC(e2); |
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RC4(&ctx,num,buffer,buffer); |
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} |
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printf("RC4 (%d bytes) %d %d (%d) - 8 bytes\n",num, |
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e1-s1,e2-s2,(e1-s1)-(e2-s2)); |
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} |
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} |
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