Add a stand-alone "timing" program

Reviewed-by: Dmitry Belyavskiy <[email protected]> Reviewed-by: Paul Dale <[email protected]> Reviewed-by: David von Oheimb <[email protected]> (Merged from openssl#18821)
Enaturuinvest · Aug 16, 2022 · 6212fc6 · 6212fc6
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diff --git a/test/timing-cert.pem b/test/timing-cert.pem
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDJTCCAg2gAwIBAgIBAjANBgkqhkiG9w0BAQsFADASMRAwDgYDVQQDDAdSb290
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+-----END CERTIFICATE-----
diff --git a/test/timing-key.pem b/test/timing-key.pem
@@ -0,0 +1,29 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDVXWBq3/xh7kiq
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+KQypwAFz0tbHxaNag/bSAN0J
+-----END PRIVATE KEY-----
+
diff --git a/test/timing.c b/test/timing.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ *
+ * I compiled this in the source tree this way:
+ *      gcc -g -Iinclude a.c libcrypto.a -ldl -lpthread
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <openssl/pem.h>
+#include <openssl/x509.h>
+#include <openssl/err.h>
+#include <openssl/bio.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+static char *prog = "./a.out";
+
+static void readx509(const char *contents, int size)
+{
+    X509 *x = NULL;
+    BIO *b = BIO_new_mem_buf(contents, size);
+
+    if (b == NULL)
+        ERR_print_errors_fp(stderr), exit(1);
+    PEM_read_bio_X509(b, &x, 0, NULL);
+    if (x == NULL)
+        ERR_print_errors_fp(stderr), exit(1);
+    X509_free(x);
+    BIO_free(b);
+}
+
+static void readpkey(const char *contents, int size)
+{
+    BIO *b = BIO_new_mem_buf(contents, size);
+    EVP_PKEY *pkey;
+
+    if (b == NULL)
+        ERR_print_errors_fp(stderr), exit(1);
+    pkey = PEM_read_bio_PrivateKey(b, NULL, NULL, NULL);
+    if (pkey == NULL)
+        ERR_print_errors_fp(stderr), exit(1);
+
+    EVP_PKEY_free(pkey);
+    BIO_free(b);
+}
+
+
+static void print(const char *what, struct timeval *tp)
+{
+    printf("%s %ld sec %ld microsec\n", what, tp->tv_sec, tp->tv_usec);
+}
+
+static void usage(void)
+{
+    fprintf(stderr, "Usage: %s [flags] pem-file\n", prog);
+    fprintf(stderr, "Flags:\n");
+    fprintf(stderr, "  -c #  Repeat count\n");
+    fprintf(stderr, "  -d    Debugging output (minimal)\n");
+    fprintf(stderr, "  -w C  What to load C is a single character:\n");
+    fprintf(stderr, "          c for cert (default)\n");
+    fprintf(stderr, "          p for private key\n");
+    exit(1);
+}
+
+int main(int ac, char **av)
+{
+    int i, debug = 0, count = 100, what = 'c';
+    struct stat sb;
+    FILE *fp;
+    char *contents;
+    struct rusage now, start, end, elapsed;
+    struct timeval e_start, e_end, e_elapsed;
+
+    /* Parse JCL. */
+    prog = av[0];
+    while ((i = getopt(ac, av, "c:dw:")) != EOF) {
+        switch (i) {
+        default:
+            usage();
+        case 'c':
+            if ((count = atoi(optarg)) < 0)
+                usage();
+            break;
+        case 'd':
+            debug = 1;
+            break;
+        case 'w':
+            if (optarg[1] != '\0')
+                usage;
+            switch (*optarg) {
+            default:
+                usage();
+            case 'c':
+            case 'p':
+                what = *optarg;
+                break;
+            }
+            break;
+        }
+    }
+    ac -= optind;
+    av += optind;
+
+    /* Read input file. */
+    if (av[0] == NULL)
+        usage();
+    if (stat(av[0], &sb) < 0)
+        perror(av[0]), exit(1);
+    contents = malloc(sb.st_size + 1);
+    if (contents == NULL)
+        perror("malloc"), exit(1);
+    fp = fopen(av[0], "r");
+    if (fread(contents, 1, sb.st_size, fp) != sb.st_size)
+        perror("fread"), exit(1);
+    contents[sb.st_size] = '\0';
+    fclose(fp);
+    if (debug)
+        printf(">%s<\n", contents);
+
+    /* Try to prep system cache, etc. */
+    for (i = 10; --i >= 0; ) {
+        switch (what) {
+        case 'c':
+            readx509(contents, (int)sb.st_size);
+            break;
+        case 'p':
+            readpkey(contents, (int)sb.st_size);
+            break;
+        }
+    }
+
+    if (gettimeofday(&e_start, NULL) < 0)
+        perror("elapsed start"), exit(1);
+    if (getrusage(RUSAGE_SELF, &start) < 0)
+        perror("start"), exit(1);
+    for (i = count; --i >= 0; ) {
+        switch (what) {
+        case 'c':
+            readx509(contents, (int)sb.st_size);
+            break;
+        case 'p':
+            readpkey(contents, (int)sb.st_size);
+            break;
+        }
+    }
+    if (getrusage(RUSAGE_SELF, &end) < 0)
+        perror("end"), exit(1);
+    if (gettimeofday(&e_end, NULL) < 0)
+        perror("end"), exit(1);
+
+    timersub(&end.ru_utime, &start.ru_stime, &elapsed.ru_stime);
+    timersub(&end.ru_utime, &start.ru_utime, &elapsed.ru_utime);
+    timersub(&e_end, &e_start, &e_elapsed);
+    print("user     ", &elapsed.ru_utime);
+    print("sys      ", &elapsed.ru_stime);
+    if (debug)
+        print("elapsed??", &e_elapsed);
+    return 0;
+}