tools: add benchmark for crypto functions.

The benchmark tests the speed of the following algorithms:
MD5, SHA-1, SHA-256, SHA-512, RIPEMD-160, AES-128.

It can optionally be built to perform the same benchmark on
other crypto libraries, for comparison purposes.
The supported libraries are:
- crypto:   OpenSSL's libcrypto;
- gcrypt:   GnuTLS's libgcrypt;
- tomcrypt: LibTomCrypt
To enable them, use this syntax:
make VERSUS=crypto+gcrypt+tomcrypt tools/crypto_bench
They do not need to have been enabled in configure.

.gitignore

@@ -63,6 +63,7 @@
 /tools/aviocat
 /tools/ffbisect
 /tools/bisect.need
+/tools/crypto_bench
 /tools/cws2fws
 /tools/fourcc2pixfmt
 /tools/ffescape

libavutil/Makefile

@@ -159,6 +159,9 @@ TESTPROGS = adler32                                                     \
 
 TESTPROGS-$(HAVE_LZO1X_999_COMPRESS) += lzo
 
-TOOLS = ffhash ffeval ffescape
+TOOLS = crypto_bench ffhash ffeval ffescape
+
+tools/crypto_bench$(EXESUF): ELIBS += $(if $(VERSUS),$(subst +, -l,+$(VERSUS)),)
+tools/crypto_bench$(EXESUF): CFLAGS += -DUSE_EXT_LIBS=0$(if $(VERSUS),$(subst +,+USE_,+$(VERSUS)),)
 
 $(SUBDIR)lzo-test$(EXESUF): ELIBS = -llzo2

tools/crypto_bench.c

+/*
+ * Copyright (c) 2013 Nicolas George
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/* Optional external libraries; can be enabled using:
+ * make VERSUS=crypto+gcrypt+tomcrypt tools/crypto_bench */
+#define USE_crypto           0x01    /* OpenSSL's libcrypto */
+#define USE_gcrypt           0x02    /* GnuTLS's libgcrypt */
+#define USE_tomcrypt         0x04    /* LibTomCrypt */
+
+#include <stdlib.h>
+#include <math.h>
+
+#include "libavutil/avutil.h"
+#include "libavutil/avstring.h"
+#include "libavutil/crc.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/timer.h"
+
+#if HAVE_UNISTD_H
+#include <unistd.h> /* for getopt */
+#endif
+#if !HAVE_GETOPT
+#include "compat/getopt.c"
+#endif
+
+#define MAX_INPUT_SIZE 1048576
+#define MAX_OUTPUT_SIZE 128
+
+static const char *enabled_libs;
+static const char *enabled_algos;
+static unsigned specified_runs;
+
+static const uint8_t *hardcoded_key = "FFmpeg is the best program ever.";
+
+static void fatal_error(const char *tag)
+{
+    av_log(NULL, AV_LOG_ERROR, "Fatal error: %s\n", tag);
+    exit(1);
+}
+
+struct hash_impl {
+    const char *lib;
+    const char *name;
+    void (*run)(uint8_t *output, const uint8_t *input, unsigned size);
+    const char *output;
+};
+
+/***************************************************************************
+ * lavu: libavutil
+ ***************************************************************************/
+
+#include "libavutil/md5.h"
+#include "libavutil/sha.h"
+#include "libavutil/sha512.h"
+#include "libavutil/ripemd.h"
+#include "libavutil/aes.h"
+
+#define IMPL_USE_lavu IMPL_USE
+
+static void run_lavu_md5(uint8_t *output,
+                         const uint8_t *input, unsigned size)
+{
+    av_md5_sum(output, input, size);
+}
+
+#define DEFINE_LAVU_MD(suffix, type, namespace, hsize)                       \
+static void run_lavu_ ## suffix(uint8_t *output,                             \
+                                const uint8_t *input, unsigned size)         \
+{                                                                            \
+    static struct type *h;                                                   \
+    if (!h && !(h = av_ ## namespace ## _alloc()))                           \
+        fatal_error("out of memory");                                        \
+    av_ ## namespace ## _init(h, hsize);                                     \
+    av_ ## namespace ## _update(h, input, size);                             \
+    av_ ## namespace ## _final(h, output);                                   \
+}
+
+DEFINE_LAVU_MD(sha1,      AVSHA,    sha, 160);
+DEFINE_LAVU_MD(sha256,    AVSHA,    sha, 256);
+DEFINE_LAVU_MD(sha512,    AVSHA512, sha512, 512);
+DEFINE_LAVU_MD(ripemd160, AVRIPEMD, ripemd, 160);
+
+static void run_lavu_aes128(uint8_t *output,
+                            const uint8_t *input, unsigned size)
+{
+    static struct AVAES *aes;
+    if (!aes && !(aes = av_aes_alloc()))
+        fatal_error("out of memory");
+    av_aes_init(aes, hardcoded_key, 128, 0);
+    av_aes_crypt(aes, output, input, size >> 4, NULL, 0);
+}
+
+/***************************************************************************
+ * crypto: OpenSSL's libcrypto
+ ***************************************************************************/
+
+#if (USE_EXT_LIBS) & USE_crypto
+
+#include <openssl/md5.h>
+#include <openssl/sha.h>
+#include <openssl/ripemd.h>
+#include <openssl/aes.h>
+
+#define DEFINE_CRYPTO_WRAPPER(suffix, function)                              \
+static void run_crypto_ ## suffix(uint8_t *output,                           \
+                                  const uint8_t *input, unsigned size)       \
+{                                                                            \
+    function(input, size, output);                                           \
+}
+
+DEFINE_CRYPTO_WRAPPER(md5,       MD5)
+DEFINE_CRYPTO_WRAPPER(sha1,      SHA1)
+DEFINE_CRYPTO_WRAPPER(sha256,    SHA256)
+DEFINE_CRYPTO_WRAPPER(sha512,    SHA512)
+DEFINE_CRYPTO_WRAPPER(ripemd160, RIPEMD160)
+
+static void run_crypto_aes128(uint8_t *output,
+                              const uint8_t *input, unsigned size)
+{
+    AES_KEY aes;
+    unsigned i;
+
+    AES_set_encrypt_key(hardcoded_key, 128, &aes);
+    size -= 15;
+    for (i = 0; i < size; i += 16)
+        AES_encrypt(input + i, output + i, &aes);
+}
+
+#define IMPL_USE_crypto(...) IMPL_USE(__VA_ARGS__)
+#else
+#define IMPL_USE_crypto(...) /* ignore */
+#endif
+
+/***************************************************************************
+ * gcrypt: GnuTLS's libgcrypt
+ ***************************************************************************/
+
+#if (USE_EXT_LIBS) & USE_gcrypt
+
+#include <gcrypt.h>
+
+#define DEFINE_GCRYPT_WRAPPER(suffix, algo)                                  \
+static void run_gcrypt_ ## suffix(uint8_t *output,                           \
+                                  const uint8_t *input, unsigned size)       \
+{                                                                            \
+    gcry_md_hash_buffer(GCRY_MD_ ## algo, output, input, size);              \
+}
+
+DEFINE_GCRYPT_WRAPPER(md5,       MD5)
+DEFINE_GCRYPT_WRAPPER(sha1,      SHA1)
+DEFINE_GCRYPT_WRAPPER(sha256,    SHA256)
+DEFINE_GCRYPT_WRAPPER(sha512,    SHA512)
+DEFINE_GCRYPT_WRAPPER(ripemd160, RMD160)
+
+static void run_gcrypt_aes128(uint8_t *output,
+                              const uint8_t *input, unsigned size)
+{
+    static gcry_cipher_hd_t aes;
+    if (aes == NULL)
+        gcry_cipher_open(&aes, GCRY_CIPHER_AES128, GCRY_CIPHER_MODE_ECB, 0);
+    gcry_cipher_setkey(aes, hardcoded_key, 16);
+    gcry_cipher_encrypt(aes, output, size, input, size);
+}
+
+#define IMPL_USE_gcrypt(...) IMPL_USE(__VA_ARGS__)
+#else
+#define IMPL_USE_gcrypt(...) /* ignore */
+#endif
+
+/***************************************************************************
+ * tomcrypt: LibTomCrypt
+ ***************************************************************************/
+
+#if (USE_EXT_LIBS) & USE_tomcrypt
+
+#include <tomcrypt.h>
+
+#define DEFINE_TOMCRYPT_WRAPPER(suffix, namespace, algo)                     \
+static void run_tomcrypt_ ## suffix(uint8_t *output,                         \
+                                    const uint8_t *input, unsigned size)     \
+{                                                                            \
+    hash_state md;                                                           \
+    namespace ## _init(&md);                                                 \
+    namespace ## _process(&md, input, size);                                 \
+    namespace ## _done(&md, output);                                         \
+}
+
+DEFINE_TOMCRYPT_WRAPPER(md5,       md5,    MD5)
+DEFINE_TOMCRYPT_WRAPPER(sha1,      sha1,   SHA1)
+DEFINE_TOMCRYPT_WRAPPER(sha256,    sha256, SHA256)
+DEFINE_TOMCRYPT_WRAPPER(sha512,    sha512, SHA512)
+DEFINE_TOMCRYPT_WRAPPER(ripemd160, rmd160, RIPEMD160)
+
+static void run_tomcrypt_aes128(uint8_t *output,
+                                const uint8_t *input, unsigned size)
+{
+    symmetric_key aes;
+    unsigned i;
+
+    aes_setup(hardcoded_key, 16, 0, &aes);
+    size -= 15;
+    for (i = 0; i < size; i += 16)
+        aes_ecb_encrypt(input + i, output + i, &aes);
+}
+
+#define IMPL_USE_tomcrypt(...) IMPL_USE(__VA_ARGS__)
+#else
+#define IMPL_USE_tomcrypt(...) /* ignore */
+#endif
+
+/***************************************************************************
+ * Driver code
+ ***************************************************************************/
+
+static unsigned crc32(const uint8_t *data, unsigned size)
+{
+    return av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, data, size);
+}
+
+static void run_implementation(const uint8_t *input, uint8_t *output,
+                               struct hash_impl *impl, unsigned size)
+{
+    uint64_t t0, t1;
+    unsigned nruns = specified_runs ? specified_runs : (1 << 30) / size;
+    unsigned outlen = 0, outcrc = 0;
+    unsigned i, j, val;
+    double mtime, ttime = 0, ttime2 = 0, stime;
+    uint8_t outref[MAX_OUTPUT_SIZE];
+
+    if (enabled_libs  && !av_stristr(enabled_libs,  impl->lib) ||
+        enabled_algos && !av_stristr(enabled_algos, impl->name))
+        return;
+    if (!sscanf(impl->output, "crc:%x", &outcrc)) {
+        outlen = strlen(impl->output) / 2;
+        for (i = 0; i < outlen; i++) {
+            sscanf(impl->output + i * 2, "%02x", &val);
+            outref[i] = val;
+        }
+    }
+    for (i = 0; i < 8; i++) /* heat caches */
+        impl->run(output, input, size);
+    for (i = 0; i < nruns; i++) {
+        memset(output, 0, size); /* avoid lefovers from previous runs */
+        t0 = AV_READ_TIME();
+        impl->run(output, input, size);
+        t1 = AV_READ_TIME();
+        if (outlen ? memcmp(output, outref, outlen) :
+                     crc32(output, size) != outcrc) {
+            fprintf(stderr, "Expected: ");
+            if (outlen)
+                for (j = 0; j < outlen; j++)
+                    fprintf(stderr, "%02x", output[j]);
+            else
+                fprintf(stderr, "%08x", crc32(output, size));
+            fprintf(stderr, "\n");
+            fatal_error("output mismatch");
+        }
+        mtime = (double)(t1 - t0) / size;
+        ttime  += mtime;
+        ttime2 += mtime * mtime;
+    }
+
+    ttime  /= nruns;
+    ttime2 /= nruns;
+    stime = sqrt(ttime2 - ttime * ttime);
+    printf("%-10s %-12s size: %7d  runs: %6d  time: %8.3f +- %.3f\n",
+           impl->lib, impl->name, size, nruns, ttime, stime);
+    fflush(stdout);
+}
+
+#define IMPL_USE(lib, name, symbol, output) \
+    { #lib, name, run_ ## lib ## _ ## symbol, output },
+#define IMPL(lib, ...) IMPL_USE_ ## lib(lib, __VA_ARGS__)
+#define IMPL_ALL(...) \
+    IMPL(lavu,       __VA_ARGS__) \
+    IMPL(crypto,     __VA_ARGS__) \
+    IMPL(gcrypt,     __VA_ARGS__) \
+    IMPL(tomcrypt,   __VA_ARGS__)
+
+struct hash_impl implementations[] = {
+    IMPL_ALL("MD5",        md5,       "aa26ff5b895356bcffd9292ba9f89e66")
+    IMPL_ALL("SHA-1",      sha1,      "1fd8bd1fa02f5b0fe916b0d71750726b096c5744")
+    IMPL_ALL("SHA-256",    sha256,    "14028ac673b3087e51a1d407fbf0df4deeec8f217119e13b07bf2138f93db8c5")
+    IMPL_ALL("SHA-512",    sha512,    "3afdd44a80d99af15c87bd724cb717243193767835ce866dd5d58c02d674bb57"
+                                      "7c25b9e118c200a189fcd5a01ef106a4e200061f3e97dbf50ba065745fd46bef")
+    IMPL_ALL("RIPEMD-160", ripemd160, "62a5321e4fc8784903bb43ab7752c75f8b25af00")
+    IMPL_ALL("AES-128",    aes128,    "crc:ff6bc888")
+};
+
+int main(int argc, char **argv)
+{
+    uint8_t *input = av_malloc(MAX_INPUT_SIZE * 2);
+    uint8_t *output = input + MAX_INPUT_SIZE;
+    unsigned i, impl, size;
+    int opt;
+
+    while ((opt = getopt(argc, argv, "hl:a:r:")) != -1) {
+        switch (opt) {
+        case 'l':
+            enabled_libs = optarg;
+            break;
+        case 'a':
+            enabled_algos = optarg;
+            break;
+        case 'r':
+            specified_runs = strtol(optarg, NULL, 0);
+            break;
+        case 'h':
+        default:
+            fprintf(stderr, "Usage: %s [-l libs] [-a algos] [-r runs]\n",
+                    argv[0]);
+            if ((USE_EXT_LIBS)) {
+                char buf[1024];
+                snprintf(buf, sizeof(buf), "%s%s%s",
+                         ((USE_EXT_LIBS) & USE_crypto)   ? "+crypto"   : "",
+                         ((USE_EXT_LIBS) & USE_gcrypt)   ? "+gcrypt"   : "",
+                         ((USE_EXT_LIBS) & USE_tomcrypt) ? "+tomcrypt" : "");
+                fprintf(stderr, "Built with the following external librares:\n"
+                        "make VERSUS=%s\n", buf + 1);
+            } else {
+                fprintf(stderr, "Built without external libraries; use\n"
+                        "make VERSUS=crypto+gcrypt+tomcrypt tools/crypto_bench\n"
+                        "to enable them.\n");
+            }
+            exit(opt != 'h');
+        }
+    }
+
+    if (!input)
+        fatal_error("out of memory");
+    for (i = 0; i < MAX_INPUT_SIZE; i += 4)
+        AV_WB32(input + i, i);
+
+    size = MAX_INPUT_SIZE;
+    for (impl = 0; impl < FF_ARRAY_ELEMS(implementations); impl++)
+        run_implementation(input, output, &implementations[impl], size);
+
+    av_free(input);
+
+    return 0;
+}