test/servername_test.c

   1 /*
   2  * Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  * Copyright 2017 BaishanCloud. All rights reserved.
   4  *
   5  * Licensed under the Apache License 2.0 (the "License").  You may not use
   6  * this file except in compliance with the License.  You can obtain a copy
   7  * in the file LICENSE in the source distribution or at
   8  * https://www.openssl.org/source/license.html
   9  */
  10
  11 #include <string.h>
  12
  13 #include <openssl/opensslconf.h>
  14 #include <openssl/bio.h>
  15 #include <openssl/crypto.h>
  16 #include <openssl/evp.h>
  17 #include <openssl/ssl.h>
  18 #include <openssl/err.h>
  19 #include <time.h>
  20
  21 #include "internal/packet.h"
  22
  23 #include "testutil.h"
  24 #include "internal/nelem.h"
  25 #include "ssltestlib.h"
  26
  27 #define CLIENT_VERSION_LEN      2
  28
  29 static const char *host = "dummy-host";
  30
  31 static char *cert = NULL;
  32 static char *privkey = NULL;
  33
  34 static int get_sni_from_client_hello(BIO *bio, char **sni)
  35 {
  36     long len;
  37     unsigned char *data;
  38     PACKET pkt, pkt2, pkt3, pkt4, pkt5;
  39     unsigned int servname_type = 0, type = 0;
  40     int ret = 0;
  41
  42     memset(&pkt, 0, sizeof(pkt));
  43     memset(&pkt2, 0, sizeof(pkt2));
  44     memset(&pkt3, 0, sizeof(pkt3));
  45     memset(&pkt4, 0, sizeof(pkt4));
  46     memset(&pkt5, 0, sizeof(pkt5));
  47
  48     len = BIO_get_mem_data(bio, (char **)&data);
  49     if (!TEST_true(PACKET_buf_init(&pkt, data, len))
  50                /* Skip the record header */
  51             || !PACKET_forward(&pkt, SSL3_RT_HEADER_LENGTH)
  52                /* Skip the handshake message header */
  53             || !TEST_true(PACKET_forward(&pkt, SSL3_HM_HEADER_LENGTH))
  54                /* Skip client version and random */
  55             || !TEST_true(PACKET_forward(&pkt, CLIENT_VERSION_LEN
  56                                                + SSL3_RANDOM_SIZE))
  57                /* Skip session id */
  58             || !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
  59                /* Skip ciphers */
  60             || !TEST_true(PACKET_get_length_prefixed_2(&pkt, &pkt2))
  61                /* Skip compression */
  62             || !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
  63                /* Extensions len */
  64             || !TEST_true(PACKET_as_length_prefixed_2(&pkt, &pkt2)))
  65         goto end;
  66
  67     /* Loop through all extensions for SNI */
  68     while (PACKET_remaining(&pkt2)) {
  69         if (!TEST_true(PACKET_get_net_2(&pkt2, &type))
  70                 || !TEST_true(PACKET_get_length_prefixed_2(&pkt2, &pkt3)))
  71             goto end;
  72         if (type == TLSEXT_TYPE_server_name) {
  73             if (!TEST_true(PACKET_get_length_prefixed_2(&pkt3, &pkt4))
  74                     || !TEST_uint_ne(PACKET_remaining(&pkt4), 0)
  75                     || !TEST_true(PACKET_get_1(&pkt4, &servname_type))
  76                     || !TEST_uint_eq(servname_type, TLSEXT_NAMETYPE_host_name)
  77                     || !TEST_true(PACKET_get_length_prefixed_2(&pkt4, &pkt5))
  78                     || !TEST_uint_le(PACKET_remaining(&pkt5), TLSEXT_MAXLEN_host_name)
  79                     || !TEST_false(PACKET_contains_zero_byte(&pkt5))
  80                     || !TEST_true(PACKET_strndup(&pkt5, sni)))
  81                 goto end;
  82             ret = 1;
  83             goto end;
  84         }
  85     }
  86 end:
  87     return ret;
  88 }
  89
  90 static int client_setup_sni_before_state(void)
  91 {
  92     SSL_CTX *ctx;
  93     SSL *con = NULL;
  94     BIO *rbio;
  95     BIO *wbio;
  96     char *hostname = NULL;
  97     int ret = 0;
  98
  99     /* use TLS_method to blur 'side' */
 100     ctx = SSL_CTX_new(TLS_method());
 101     if (!TEST_ptr(ctx))
 102         goto end;
 103
 104     con = SSL_new(ctx);
 105     if (!TEST_ptr(con))
 106         goto end;
 107
 108     /* set SNI before 'client side' is set */
 109     SSL_set_tlsext_host_name(con, host);
 110
 111     rbio = BIO_new(BIO_s_mem());
 112     wbio = BIO_new(BIO_s_mem());
 113     if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) {
 114         BIO_free(rbio);
 115         BIO_free(wbio);
 116         goto end;
 117     }
 118
 119     SSL_set_bio(con, rbio, wbio);
 120
 121     if (!TEST_int_le(SSL_connect(con), 0))
 122         /* This shouldn't succeed because we don't have a server! */
 123         goto end;
 124     if (!TEST_true(get_sni_from_client_hello(wbio, &hostname)))
 125         /* no SNI in client hello */
 126         goto end;
 127     if (!TEST_str_eq(hostname, host))
 128         /* incorrect SNI value */
 129         goto end;
 130     ret = 1;
 131 end:
 132     OPENSSL_free(hostname);
 133     SSL_free(con);
 134     SSL_CTX_free(ctx);
 135     return ret;
 136 }
 137
 138 static int client_setup_sni_after_state(void)
 139 {
 140     SSL_CTX *ctx;
 141     SSL *con = NULL;
 142     BIO *rbio;
 143     BIO *wbio;
 144     char *hostname = NULL;
 145     int ret = 0;
 146
 147     /* use TLS_method to blur 'side' */
 148     ctx = SSL_CTX_new(TLS_method());
 149     if (!TEST_ptr(ctx))
 150         goto end;
 151
 152     con = SSL_new(ctx);
 153     if (!TEST_ptr(con))
 154         goto end;
 155
 156     rbio = BIO_new(BIO_s_mem());
 157     wbio = BIO_new(BIO_s_mem());
 158     if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) {
 159         BIO_free(rbio);
 160         BIO_free(wbio);
 161         goto end;
 162     }
 163
 164     SSL_set_bio(con, rbio, wbio);
 165     SSL_set_connect_state(con);
 166
 167     /* set SNI after 'client side' is set */
 168     SSL_set_tlsext_host_name(con, host);
 169
 170     if (!TEST_int_le(SSL_connect(con), 0))
 171         /* This shouldn't succeed because we don't have a server! */
 172         goto end;
 173     if (!TEST_true(get_sni_from_client_hello(wbio, &hostname)))
 174         /* no SNI in client hello */
 175         goto end;
 176     if (!TEST_str_eq(hostname, host))
 177         /* incorrect SNI value */
 178         goto end;
 179     ret = 1;
 180 end:
 181     OPENSSL_free(hostname);
 182     SSL_free(con);
 183     SSL_CTX_free(ctx);
 184     return ret;
 185 }
 186
 187 static int server_setup_sni(void)
 188 {
 189     SSL_CTX *cctx = NULL, *sctx = NULL;
 190     SSL *clientssl = NULL, *serverssl = NULL;
 191     int testresult = 0;
 192
 193     if (!TEST_true(create_ssl_ctx_pair(TLS_server_method(),
 194                                        TLS_client_method(),
 195                                        TLS1_VERSION, 0,
 196                                        &sctx, &cctx, cert, privkey))
 197             || !TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
 198                                              NULL, NULL)))
 199         goto end;
 200
 201     /* set SNI at server side */
 202     SSL_set_tlsext_host_name(serverssl, host);
 203
 204     if (!TEST_true(create_ssl_connection(serverssl, clientssl, SSL_ERROR_NONE)))
 205         goto end;
 206
 207     if (!TEST_ptr_null(SSL_get_servername(serverssl,
 208                                           TLSEXT_NAMETYPE_host_name))) {
 209         /* SNI should have been cleared during handshake */
 210         goto end;
 211     }
 212
 213     testresult = 1;
 214 end:
 215     SSL_free(serverssl);
 216     SSL_free(clientssl);
 217     SSL_CTX_free(sctx);
 218     SSL_CTX_free(cctx);
 219
 220     return testresult;
 221 }
 222
 223 typedef int (*sni_test_fn)(void);
 224
 225 static sni_test_fn sni_test_fns[3] = {
 226     client_setup_sni_before_state,
 227     client_setup_sni_after_state,
 228     server_setup_sni
 229 };
 230
 231 static int test_servername(int test)
 232 {
 233     /*
 234      * For each test set up an SSL_CTX and SSL and see
 235      * what SNI behaves.
 236      */
 237     return sni_test_fns[test]();
 238 }
 239
 240 int setup_tests(void)
 241 {
 242     if (!TEST_ptr(cert = test_get_argument(0))
 243             || !TEST_ptr(privkey = test_get_argument(1)))
 244         return 0;
 245
 246     ADD_ALL_TESTS(test_servername, OSSL_NELEM(sni_test_fns));
 247     return 1;
 248 }