release/src/router/dnscrypt/src/libnacl/crypto_stream/measure.c

   1 #include <stdlib.h>
   2 #include "randombytes.h"
   3 #include "cpucycles.h"
   4 #include "crypto_stream.h"
   5
   6 extern void printentry(long long,const char *,long long *,long long);
   7 extern unsigned char *alignedcalloc(unsigned long long);
   8 extern const char *primitiveimplementation;
   9 extern const char *implementationversion;
  10 extern const char *sizenames[];
  11 extern const long long sizes[];
  12 extern void allocate(void);
  13 extern void measure(void);
  14
  15 const char *primitiveimplementation = crypto_stream_IMPLEMENTATION;
  16 const char *implementationversion = crypto_stream_VERSION;
  17 const char *sizenames[] = { "keybytes", "noncebytes", 0 };
  18 const long long sizes[] = { crypto_stream_KEYBYTES, crypto_stream_NONCEBYTES };
  19
  20 #define MAXTEST_BYTES 4096
  21 #ifdef SUPERCOP
  22 #define MGAP 8192
  23 #else
  24 #define MGAP 8
  25 #endif
  26
  27 static unsigned char *k;
  28 static unsigned char *n;
  29 static unsigned char *m;
  30 static unsigned char *c;
  31
  32 void preallocate(void)
  33 {
  34 }
  35
  36 void allocate(void)
  37 {
  38   k = alignedcalloc(crypto_stream_KEYBYTES);
  39   n = alignedcalloc(crypto_stream_NONCEBYTES);
  40   m = alignedcalloc(MAXTEST_BYTES);
  41   c = alignedcalloc(MAXTEST_BYTES);
  42 }
  43
  44 #define TIMINGS 15
  45 static long long cycles[TIMINGS + 1];
  46
  47 void measure(void)
  48 {
  49   int i;
  50   int loop;
  51   int mlen;
  52
  53   for (loop = 0;loop < LOOPS;++loop) {
  54     for (mlen = 0;mlen <= MAXTEST_BYTES;mlen += 1 + mlen / MGAP) {
  55       randombytes(k,crypto_stream_KEYBYTES);
  56       randombytes(n,crypto_stream_NONCEBYTES);
  57       randombytes(m,mlen);
  58       randombytes(c,mlen);
  59       for (i = 0;i <= TIMINGS;++i) {
  60         cycles[i] = cpucycles();
  61         crypto_stream(c,mlen,n,k);
  62       }
  63       for (i = 0;i < TIMINGS;++i) cycles[i] = cycles[i + 1] - cycles[i];
  64       printentry(mlen,"cycles",cycles,TIMINGS);
  65       for (i = 0;i <= TIMINGS;++i) {
  66         cycles[i] = cpucycles();
  67         crypto_stream_xor(c,m,mlen,n,k);
  68       }
  69       for (i = 0;i < TIMINGS;++i) cycles[i] = cycles[i + 1] - cycles[i];
  70       printentry(mlen,"xor_cycles",cycles,TIMINGS);
  71     }
  72   }
  73 }