test/ssl_test.c

   1 /*
   2  * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL licenses, (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  * https://www.openssl.org/source/license.html
   8  * or in the file LICENSE in the source distribution.
   9  */
  10
  11 #include <stdio.h>
  12
  13 #include <openssl/conf.h>
  14 #include <openssl/err.h>
  15 #include <openssl/ssl.h>
  16
  17 #include "handshake_helper.h"
  18 #include "ssl_test_ctx.h"
  19 #include "testutil.h"
  20
  21 static CONF *conf = NULL;
  22
  23 /* Currently the section names are of the form test-<number>, e.g. test-15. */
  24 #define MAX_TESTCASE_NAME_LENGTH 100
  25
  26 typedef struct ssl_test_ctx_test_fixture {
  27     const char *test_case_name;
  28     char test_app[MAX_TESTCASE_NAME_LENGTH];
  29 } SSL_TEST_FIXTURE;
  30
  31 static SSL_TEST_FIXTURE set_up(const char *const test_case_name)
  32 {
  33     SSL_TEST_FIXTURE fixture;
  34     fixture.test_case_name = test_case_name;
  35     return fixture;
  36 }
  37
  38 static const char *print_alert(int alert)
  39 {
  40     return alert ? SSL_alert_desc_string_long(alert) : "no alert";
  41 }
  42
  43 static int check_result(HANDSHAKE_RESULT result, SSL_TEST_CTX *test_ctx)
  44 {
  45     if (result.result != test_ctx->expected_result) {
  46         fprintf(stderr, "ExpectedResult mismatch: expected %s, got %s.\n",
  47                 ssl_test_result_t_name(test_ctx->expected_result),
  48                 ssl_test_result_t_name(result.result));
  49         return 0;
  50     }
  51     return 1;
  52 }
  53
  54 static int check_alerts(HANDSHAKE_RESULT result, SSL_TEST_CTX *test_ctx)
  55 {
  56     if (result.client_alert_sent != result.client_alert_received) {
  57         fprintf(stderr, "Client sent alert %s but server received %s\n.",
  58                 print_alert(result.client_alert_sent),
  59                 print_alert(result.client_alert_received));
  60         /*
  61          * We can't bail here because the peer doesn't always get far enough
  62          * to process a received alert. Specifically, in protocol version
  63          * negotiation tests, we have the following scenario.
  64          * Client supports TLS v1.2 only; Server supports TLS v1.1.
  65          * Client proposes TLS v1.2; server responds with 1.1;
  66          * Client now sends a protocol alert, using TLS v1.2 in the header.
  67          * The server, however, rejects the alert because of version mismatch
  68          * in the record layer; therefore, the server appears to never
  69          * receive the alert.
  70          */
  71         /* return 0; */
  72     }
  73
  74     if (result.server_alert_sent != result.server_alert_received) {
  75         fprintf(stderr, "Server sent alert %s but client received %s\n.",
  76                 print_alert(result.server_alert_sent),
  77                 print_alert(result.server_alert_received));
  78         /* return 0; */
  79     }
  80
  81     /* Tolerate an alert if one wasn't explicitly specified in the test. */
  82     if (test_ctx->client_alert
  83         /*
  84          * The info callback alert value is computed as
  85          * (s->s3->send_alert[0] << 8) | s->s3->send_alert[1]
  86          * where the low byte is the alert code and the high byte is other stuff.
  87          */
  88         && (result.client_alert_sent & 0xff) != test_ctx->client_alert) {
  89         fprintf(stderr, "ClientAlert mismatch: expected %s, got %s.\n",
  90                 print_alert(test_ctx->client_alert),
  91                 print_alert(result.client_alert_sent));
  92         return 0;
  93     }
  94
  95     if (test_ctx->server_alert
  96         && (result.server_alert_sent & 0xff) != test_ctx->server_alert) {
  97         fprintf(stderr, "ServerAlert mismatch: expected %s, got %s.\n",
  98                 print_alert(test_ctx->server_alert),
  99                 print_alert(result.server_alert_sent));
 100         return 0;
 101     }
 102
 103     return 1;
 104 }
 105
 106 static int check_protocol(HANDSHAKE_RESULT result, SSL_TEST_CTX *test_ctx)
 107 {
 108     if (result.client_protocol != result.server_protocol) {
 109         fprintf(stderr, "Client has protocol %s but server has %s\n.",
 110                 ssl_protocol_name(result.client_protocol),
 111                 ssl_protocol_name(result.server_protocol));
 112         return 0;
 113     }
 114
 115     if (test_ctx->protocol) {
 116         if (result.client_protocol != test_ctx->protocol) {
 117             fprintf(stderr, "Protocol mismatch: expected %s, got %s.\n",
 118                     ssl_protocol_name(test_ctx->protocol),
 119                     ssl_protocol_name(result.client_protocol));
 120             return 0;
 121         }
 122     }
 123     return 1;
 124 }
 125
 126 /*
 127  * This could be further simplified by constructing an expected
 128  * HANDSHAKE_RESULT, and implementing comparison methods for
 129  * its fields.
 130  */
 131 static int check_test(HANDSHAKE_RESULT result, SSL_TEST_CTX *test_ctx)
 132 {
 133     int ret = 1;
 134     ret &= check_result(result, test_ctx);
 135     ret &= check_alerts(result, test_ctx);
 136     if (result.result == SSL_TEST_SUCCESS)
 137         ret &= check_protocol(result, test_ctx);
 138     return ret;
 139 }
 140
 141 static int execute_test(SSL_TEST_FIXTURE fixture)
 142 {
 143     /* TODO(emilia): this is confusing. Flip to return 1 on success. */
 144     int ret = 1;
 145     SSL_CTX *server_ctx = NULL, *client_ctx = NULL;
 146     SSL_TEST_CTX *test_ctx = NULL;
 147     HANDSHAKE_RESULT result;
 148
 149     server_ctx = SSL_CTX_new(TLS_server_method());
 150     client_ctx = SSL_CTX_new(TLS_client_method());
 151     OPENSSL_assert(server_ctx != NULL && client_ctx != NULL);
 152
 153     OPENSSL_assert(CONF_modules_load(conf, fixture.test_app, 0) > 0);
 154
 155     if (!SSL_CTX_config(server_ctx, "server")
 156        || !SSL_CTX_config(client_ctx, "client")) {
 157         goto err;
 158     }
 159
 160     test_ctx = SSL_TEST_CTX_create(conf, fixture.test_app);
 161     if (test_ctx == NULL)
 162         goto err;
 163
 164     result = do_handshake(server_ctx, client_ctx);
 165
 166     if (check_test(result, test_ctx))
 167         ret = 0;
 168
 169 err:
 170     CONF_modules_unload(0);
 171     SSL_CTX_free(server_ctx);
 172     SSL_CTX_free(client_ctx);
 173     SSL_TEST_CTX_free(test_ctx);
 174     if (ret != 0)
 175         ERR_print_errors_fp(stderr);
 176     return ret;
 177 }
 178
 179 static void tear_down(SSL_TEST_FIXTURE fixture)
 180 {
 181 }
 182
 183 #define SETUP_SSL_TEST_FIXTURE()                        \
 184     SETUP_TEST_FIXTURE(SSL_TEST_FIXTURE, set_up)
 185 #define EXECUTE_SSL_TEST()             \
 186     EXECUTE_TEST(execute_test, tear_down)
 187
 188 static int test_handshake(int idx)
 189 {
 190     SETUP_SSL_TEST_FIXTURE();
 191     snprintf(fixture.test_app, sizeof(fixture.test_app),
 192              "test-%d", idx);
 193     EXECUTE_SSL_TEST();
 194 }
 195
 196 int main(int argc, char **argv)
 197 {
 198     int result = 0;
 199     long num_tests;
 200
 201     if (argc != 2)
 202         return 1;
 203
 204     conf = NCONF_new(NULL);
 205     OPENSSL_assert(conf != NULL);
 206
 207     /* argv[1] should point to the test conf file */
 208     OPENSSL_assert(NCONF_load(conf, argv[1], NULL) > 0);
 209
 210     OPENSSL_assert(NCONF_get_number_e(conf, NULL, "num_tests", &num_tests));
 211
 212     ADD_ALL_TESTS(test_handshake, (int)(num_tests));
 213     result = run_tests(argv[0]);
 214
 215     CONF_modules_free();
 216     return result;
 217 }