commit 490e187056d87ddd87981e0ea1b624b61bcbb666 Author: Nick Mathewson nickm@torproject.org Date: Sat Feb 2 16:01:28 2019 +0100
Add a benchmark for our several PRNGs. --- src/test/bench.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+)
diff --git a/src/test/bench.c b/src/test/bench.c index 0713eb671..65fa617cb 100644 --- a/src/test/bench.c +++ b/src/test/bench.c @@ -14,6 +14,8 @@ #include "core/crypto/onion_tap.h" #include "core/crypto/relay_crypto.h"
+#include "lib/intmath/weakrng.h" + #ifdef ENABLE_OPENSSL #include <openssl/opensslv.h> #include <openssl/evp.h> @@ -336,6 +338,65 @@ bench_ed25519(void) }
static void +bench_rand_len(int len) +{ + const int N = 100000; + int i; + char *buf = tor_malloc(len); + uint64_t start,end; + + start = perftime(); + for (i = 0; i < N; ++i) { + crypto_rand(buf, len); + } + end = perftime(); + printf("crypto_rand(%d): %f nsec.\n", len, NANOCOUNT(start,end,N)); + + crypto_fast_rng_t *fr = crypto_fast_rng_new(); + start = perftime(); + for (i = 0; i < N; ++i) { + crypto_fast_rng_getbytes(fr,(uint8_t*)buf,len); + } + end = perftime(); + printf("crypto_fast_rng_getbytes(%d): %f nsec.\n", len, + NANOCOUNT(start,end,N)); + crypto_fast_rng_free(fr); + + if (len <= 32) { + start = perftime(); + for (i = 0; i < N; ++i) { + crypto_strongest_rand((uint8_t*)buf, len); + } + end = perftime(); + printf("crypto_strongest_rand(%d): %f nsec.\n", len, + NANOCOUNT(start,end,N)); + } + + if (len == 4) { + tor_weak_rng_t weak; + tor_init_weak_random(&weak, 1337); + + start = perftime(); + uint32_t t=0; + for (i = 0; i < N; ++i) { + t += tor_weak_random(&weak); + } + end = perftime(); + printf("weak_rand(4): %f nsec.\n", NANOCOUNT(start,end,N)); + } + + tor_free(buf); +} + +static void +bench_rand(void) +{ + bench_rand_len(4); + bench_rand_len(16); + bench_rand_len(128); +} + +static void bench_cell_aes(void) { uint64_t start, end; @@ -695,6 +756,7 @@ static struct benchmark_t benchmarks[] = { ENT(onion_TAP), ENT(onion_ntor), ENT(ed25519), + ENT(rand),
ENT(cell_aes), ENT(cell_ops),