1 files changed, 73 insertions, 0 deletions

diff --git a/nacl/crypto_stream/measure.c b/nacl/crypto_stream/measure.c
new file mode 100644
index 00000000..ff3ab610
--- /dev/null
+++ b/nacl/crypto_stream/measure.c
@@ -0,0 +1,73 @@
+#include <stdlib.h>
+#include "randombytes.h"
+#include "cpucycles.h"
+#include "crypto_stream.h"
+
+extern void printentry(long long,const char *,long long *,long long);
+extern unsigned char *alignedcalloc(unsigned long long);
+extern const char *primitiveimplementation;
+extern const char *implementationversion;
+extern const char *sizenames[];
+extern const long long sizes[];
+extern void allocate(void);
+extern void measure(void);
+
+const char *primitiveimplementation = crypto_stream_IMPLEMENTATION;
+const char *implementationversion = crypto_stream_VERSION;
+const char *sizenames[] = { "keybytes", "noncebytes", 0 };
+const long long sizes[] = { crypto_stream_KEYBYTES, crypto_stream_NONCEBYTES };
+
+#define MAXTEST_BYTES 4096
+#ifdef SUPERCOP
+#define MGAP 8192
+#else
+#define MGAP 8
+#endif
+
+static unsigned char *k;
+static unsigned char *n;
+static unsigned char *m;
+static unsigned char *c;
+
+void preallocate(void)
+{
+}
+
+void allocate(void)
+{
+  k = alignedcalloc(crypto_stream_KEYBYTES);
+  n = alignedcalloc(crypto_stream_NONCEBYTES);
+  m = alignedcalloc(MAXTEST_BYTES);
+  c = alignedcalloc(MAXTEST_BYTES);
+}
+
+#define TIMINGS 15
+static long long cycles[TIMINGS + 1];
+
+void measure(void)
+{
+  int i;
+  int loop;
+  int mlen;
+
+  for (loop = 0;loop < LOOPS;++loop) {
+    for (mlen = 0;mlen <= MAXTEST_BYTES;mlen += 1 + mlen / MGAP) {
+      randombytes(k,crypto_stream_KEYBYTES);
+      randombytes(n,crypto_stream_NONCEBYTES);
+      randombytes(m,mlen);
+      randombytes(c,mlen);
+      for (i = 0;i <= TIMINGS;++i) {
+        cycles[i] = cpucycles();
+        crypto_stream(c,mlen,n,k);
+      }
+      for (i = 0;i < TIMINGS;++i) cycles[i] = cycles[i + 1] - cycles[i];
+      printentry(mlen,"cycles",cycles,TIMINGS);
+      for (i = 0;i <= TIMINGS;++i) {
+        cycles[i] = cpucycles();
+        crypto_stream_xor(c,m,mlen,n,k);
+      }
+      for (i = 0;i < TIMINGS;++i) cycles[i] = cycles[i + 1] - cycles[i];
+      printentry(mlen,"xor_cycles",cycles,TIMINGS);
+    }
+  }
+}