test/servername_test.c

   1 /*
   2  * Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
   3  * Copyright 2017 BaishanCloud. All rights reserved.
   4  *
   5  * Licensed under the OpenSSL license (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 "../ssl/packet_locl.h"
  22
  23 #include "testutil.h"
  24 #include "e_os.h"
  25
  26 #define CLIENT_VERSION_LEN      2
  27
  28 static const char *host = "dummy-host";
  29
  30 static int get_sni_from_client_hello(BIO *bio, char **sni)
  31 {
  32     long len;
  33     unsigned char *data;
  34     PACKET pkt = {0}, pkt2 = {0}, pkt3 = {0}, pkt4 = {0}, pkt5 = {0};
  35     unsigned int servname_type = 0, type = 0;
  36     int ret = 0;
  37
  38     len = BIO_get_mem_data(bio, (char **)&data);
  39     if (!TEST_true(PACKET_buf_init(&pkt, data, len))
  40                /* Skip the record header */
  41             || !PACKET_forward(&pkt, SSL3_RT_HEADER_LENGTH)
  42                /* Skip the handshake message header */
  43             || !TEST_true(PACKET_forward(&pkt, SSL3_HM_HEADER_LENGTH))
  44                /* Skip client version and random */
  45             || !TEST_true(PACKET_forward(&pkt, CLIENT_VERSION_LEN
  46                                                + SSL3_RANDOM_SIZE))
  47                /* Skip session id */
  48             || !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
  49                /* Skip ciphers */
  50             || !TEST_true(PACKET_get_length_prefixed_2(&pkt, &pkt2))
  51                /* Skip compression */
  52             || !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
  53                /* Extensions len */
  54             || !TEST_true(PACKET_as_length_prefixed_2(&pkt, &pkt2)))
  55         goto end;
  56
  57     /* Loop through all extensions for SNI */
  58     while (PACKET_remaining(&pkt2)) {
  59         if (!TEST_true(PACKET_get_net_2(&pkt2, &type))
  60                 || !TEST_true(PACKET_get_length_prefixed_2(&pkt2, &pkt3)))
  61             goto end;
  62         if (type == TLSEXT_TYPE_server_name) {
  63             if (!TEST_true(PACKET_get_length_prefixed_2(&pkt3, &pkt4))
  64                     || !TEST_uint_ne(PACKET_remaining(&pkt4), 0)
  65                     || !TEST_true(PACKET_get_1(&pkt4, &servname_type))
  66                     || !TEST_uint_eq(servname_type, TLSEXT_NAMETYPE_host_name)
  67                     || !TEST_true(PACKET_get_length_prefixed_2(&pkt4, &pkt5))
  68                     || !TEST_uint_le(PACKET_remaining(&pkt5), TLSEXT_MAXLEN_host_name)
  69                     || !TEST_false(PACKET_contains_zero_byte(&pkt5))
  70                     || !TEST_true(PACKET_strndup(&pkt5, sni)))
  71                 goto end;
  72             ret = 1;
  73             goto end;
  74         }
  75     }
  76 end:
  77     return ret;
  78 }
  79
  80 static int client_setup_sni_before_state()
  81 {
  82     SSL_CTX *ctx;
  83     SSL *con = NULL;
  84     BIO *rbio;
  85     BIO *wbio;
  86     char *hostname = NULL;
  87     int ret = 0;
  88
  89     /* use TLS_method to blur 'side' */
  90     ctx = SSL_CTX_new(TLS_method());
  91     if (!TEST_ptr(ctx))
  92         goto end;
  93
  94     con = SSL_new(ctx);
  95     if (!TEST_ptr(con))
  96         goto end;
  97
  98     /* set SNI before 'client side' is set */
  99     SSL_set_tlsext_host_name(con, host);
 100
 101     rbio = BIO_new(BIO_s_mem());
 102     wbio = BIO_new(BIO_s_mem());
 103     if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) {
 104         BIO_free(rbio);
 105         BIO_free(wbio);
 106         goto end;
 107     }
 108
 109     SSL_set_bio(con, rbio, wbio);
 110
 111     if (!TEST_int_le(SSL_connect(con), 0))
 112         /* This shouldn't succeed because we don't have a server! */
 113         goto end;
 114     if (!TEST_true(get_sni_from_client_hello(wbio, &hostname)))
 115         /* no SNI in client hello */
 116         goto end;
 117     if (!TEST_str_eq(hostname, host))
 118         /* incorrect SNI value */
 119         goto end;
 120     ret = 1;
 121 end:
 122     OPENSSL_free(hostname);
 123     SSL_free(con);
 124     SSL_CTX_free(ctx);
 125     return ret;
 126 }
 127
 128 static int client_setup_sni_after_state()
 129 {
 130     SSL_CTX *ctx;
 131     SSL *con = NULL;
 132     BIO *rbio;
 133     BIO *wbio;
 134     char *hostname = NULL;
 135     int ret = 0;
 136
 137     /* use TLS_method to blur 'side' */
 138     ctx = SSL_CTX_new(TLS_method());
 139     if (!TEST_ptr(ctx))
 140         goto end;
 141
 142     con = SSL_new(ctx);
 143     if (!TEST_ptr(con))
 144         goto end;
 145
 146     rbio = BIO_new(BIO_s_mem());
 147     wbio = BIO_new(BIO_s_mem());
 148     if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) {
 149         BIO_free(rbio);
 150         BIO_free(wbio);
 151         goto end;
 152     }
 153
 154     SSL_set_bio(con, rbio, wbio);
 155     SSL_set_connect_state(con);
 156
 157     /* set SNI after 'client side' is set */
 158     SSL_set_tlsext_host_name(con, host);
 159
 160     if (!TEST_int_le(SSL_connect(con), 0))
 161         /* This shouldn't succeed because we don't have a server! */
 162         goto end;
 163     if (!TEST_true(get_sni_from_client_hello(wbio, &hostname)))
 164         /* no SNI in client hello */
 165         goto end;
 166     if (!TEST_str_eq(hostname, host))
 167         /* incorrect SNI value */
 168         goto end;
 169     ret = 1;
 170 end:
 171     OPENSSL_free(hostname);
 172     SSL_free(con);
 173     SSL_CTX_free(ctx);
 174     return ret;
 175 }
 176
 177 static int server_setup_sni()
 178 {
 179     SSL_CTX *ctx;
 180     SSL *con = NULL;
 181     BIO *rbio;
 182     BIO *wbio;
 183     int ret = 0;
 184
 185     /* use TLS_server_method to choose 'server-side' */
 186     ctx = SSL_CTX_new(TLS_server_method());
 187     if (!TEST_ptr(ctx))
 188         goto end;
 189
 190     con = SSL_new(ctx);
 191     if (!TEST_ptr(con))
 192         goto end;
 193
 194     rbio = BIO_new(BIO_s_mem());
 195     wbio = BIO_new(BIO_s_mem());
 196     if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) {
 197         BIO_free(rbio);
 198         BIO_free(wbio);
 199         goto end;
 200     }
 201
 202     SSL_set_bio(con, rbio, wbio);
 203
 204     /* set SNI at server side */
 205     SSL_set_tlsext_host_name(con, host);
 206
 207     if (!TEST_int_le(SSL_accept(con), 0))
 208         /* This shouldn't succeed because we have nothing to listen on */
 209         goto end;
 210     if (!TEST_ptr_null(SSL_get_servername(con, TLSEXT_NAMETYPE_host_name)))
 211         /* SNI should be cleared by SSL_accpet */
 212         goto end;
 213     ret = 1;
 214 end:
 215     SSL_free(con);
 216     SSL_CTX_free(ctx);
 217     return ret;
 218 }
 219
 220 typedef int (*sni_test_fn)(void);
 221
 222 static sni_test_fn sni_test_fns[3] = {
 223     client_setup_sni_before_state,
 224     client_setup_sni_after_state,
 225     server_setup_sni
 226 };
 227
 228 static int test_servername(int test)
 229 {
 230     /*
 231      * For each test set up an SSL_CTX and SSL and see
 232      * what SNI behaves.
 233      */
 234     return sni_test_fns[test]();
 235 }
 236
 237 int setup_tests(void)
 238 {
 239     ADD_ALL_TESTS(test_servername, OSSL_NELEM(sni_test_fns));
 240     return 1;
 241 }