Vboot Reference: Add a RSA verify benchmark.

src/platform/vboot_reference/tests/rsa_verify_benchmark.c

+/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "file_keys.h"
+#include "padding.h"
+#include "rsa.h"
+#include "timer_utils.h"
+#include "utility.h"
+
+#define FILE_NAME_SIZE 128
+#define NUM_OPERATIONS 100 /* Number of signature operations to time. */
+
+void SpeedTestAlgorithm(int algorithm) {
+  int i, key_size;
+  double speed, msecs;
+  char file_name[FILE_NAME_SIZE];
+  uint8_t* digest = NULL;
+  uint8_t* signature = NULL;
+  int digest_len;
+  int sig_len;
+  RSAPublicKey* key = NULL;
+  ClockTimerState ct;
+  char* sha_strings[] = {  /* Maps algorithm->SHA algorithm. */
+    "sha1", "sha256", "sha512",  /* RSA-1024 */
+    "sha1", "sha256", "sha512",  /* RSA-2048 */
+    "sha1", "sha256", "sha512",  /* RSA-4096 */
+    "sha1", "sha256", "sha512",  /* RSA-8192 */
+  };
+
+  key_size = siglen_map[algorithm] * sizeof(uint32_t) * 8;  /* in bits. */
+  /* Get key. */
+  snprintf(file_name, FILE_NAME_SIZE, "testkeys/key_rsa%d.keyb", key_size);
+  key = RSAPublicKeyFromFile(file_name);
+  if (!key) {
+    fprintf(stderr, "Couldn't read key from file.\n");
+    goto failure;
+  }
+
+  /* Get expected digest. */
+  snprintf(file_name, FILE_NAME_SIZE, "testcases/test_file.%s.digest",
+           sha_strings[algorithm]);
+  digest = BufferFromFile(file_name, &digest_len);
+  if (!digest) {
+    fprintf(stderr, "Couldn't read digest file.\n");
+    goto failure;
+  }
+
+  /* Get signature to verify against. */
+  snprintf(file_name, FILE_NAME_SIZE, "testcases/test_file.rsa%d_%s.sig",
+           key_size, sha_strings[algorithm]);
+  signature = BufferFromFile(file_name, &sig_len);
+  if (!signature) {
+    fprintf(stderr, "Couldn't read signature file.\n");
+    goto failure;
+  }
+
+  StartTimer(&ct);
+  for (i = 0; i < NUM_OPERATIONS; i++) {
+    if (!RSA_verify(key, signature, sig_len, algorithm, digest))
+      fprintf(stderr, "Warning: Signature Check Failed.\n");
+  }
+  StopTimer(&ct);
+
+  msecs = (float) GetDurationMsecs(&ct) / NUM_OPERATIONS;
+  speed = 1000.0 / msecs ;
+  fprintf(stderr, "rsa%d/%s bits:\tTime taken per verification = %.02f ms,"
+          " Speed = %.02f verifications/s\n", key_size, sha_strings[algorithm],
+          msecs, speed);
+
+failure:
+  Free(signature);
+  Free(digest);
+  Free(key);
+}
+
+int main(int argc, char* argv[]) {
+  int i;
+  for (i = 0; i < kNumAlgorithms; ++i) {
+    SpeedTestAlgorithm(i);
+  }
+  return 0;
+}