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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 (janke@unixg.ubc.ca) | |
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/rc4.h> | |
36 | |
37 void main(int argc,char *argv[]) | |
38 { | |
39 unsigned char buffer[1024]; | |
40 RC4_KEY ctx; | |
41 unsigned long s1,s2,e1,e2; | |
42 unsigned char k[16]; | |
43 unsigned long data[2]; | |
44 unsigned char iv[8]; | |
45 int i,num=64,numm; | |
46 int j=0; | |
47 | |
48 if (argc >= 2) | |
49 num=atoi(argv[1]); | |
50 | |
51 if (num == 0) num=256; | |
52 if (num > 1024-16) num=1024-16; | |
53 numm=num+8; | |
54 | |
55 for (j=0; j<6; j++) | |
56 { | |
57 for (i=0; i<10; i++) /**/ | |
58 { | |
59 RC4(&ctx,numm,buffer,buffer); | |
60 GetTSC(s1); | |
61 RC4(&ctx,numm,buffer,buffer); | |
62 GetTSC(e1); | |
63 GetTSC(s2); | |
64 RC4(&ctx,num,buffer,buffer); | |
65 GetTSC(e2); | |
66 RC4(&ctx,num,buffer,buffer); | |
67 } | |
68 | |
69 printf("RC4 (%d bytes) %d %d (%d) - 8 bytes\n",num, | |
70 e1-s1,e2-s2,(e1-s1)-(e2-s2)); | |
71 } | |
72 } | |
73 | |
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