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sha1s.cpp
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1 //
2 // gettsc.inl
3 //
4 // gives access to the Pentium's (secret) cycle counter
5 //
6 // This software was written by Leonard Janke ([email protected])
7 // in 1996-7 and is entered, by him, into the public domain.
8 
9 #if defined(__WATCOMC__)
10 void GetTSC(unsigned long&);
11 #pragma aux GetTSC = 0x0f 0x31 "mov [edi], eax" parm [edi] modify [edx eax];
12 #elif defined(__GNUC__)
13 inline
14 void GetTSC(unsigned long& tsc)
15 {
16  asm volatile(".byte 15, 49\n\t"
17  : "=eax" (tsc)
18  :
19  : "%edx", "%eax");
20 }
21 #elif defined(_MSC_VER)
22 inline
23 void GetTSC(unsigned long& tsc)
24 {
25  unsigned long a;
26  __asm _emit 0fh
27  __asm _emit 31h
28  __asm mov a, eax;
29  tsc=a;
30 }
31 #endif
32 
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <openssl/sha.h>
36 
37 extern "C" {
38 void sha1_block_x86(SHA_CTX *ctx, unsigned char *buffer,int num);
39 }
40 
41 void main(int argc,char *argv[])
42  {
43  unsigned char buffer[64*256];
44  SHA_CTX ctx;
45  unsigned long s1,s2,e1,e2;
46  unsigned char k[16];
47  unsigned long data[2];
48  unsigned char iv[8];
49  int i,num=0,numm;
50  int j=0;
51 
52  if (argc >= 2)
53  num=atoi(argv[1]);
54 
55  if (num == 0) num=16;
56  if (num > 250) num=16;
57  numm=num+2;
58  num*=64;
59  numm*=64;
60 
61  for (j=0; j<6; j++)
62  {
63  for (i=0; i<10; i++)
64  {
65  sha1_block_x86(&ctx,buffer,numm);
66  GetTSC(s1);
67  sha1_block_x86(&ctx,buffer,numm);
68  GetTSC(e1);
69  GetTSC(s2);
70  sha1_block_x86(&ctx,buffer,num);
71  GetTSC(e2);
72  sha1_block_x86(&ctx,buffer,num);
73  }
74 
75  printf("sha1 (%d bytes) %d %d (%.2f)\n",num,
76  e1-s1,e2-s2,(double)((e1-s1)-(e2-s2))/2);
77  }
78  }
79