Home | History | Annotate | Line # | Download | only in test 
      1 /*
      2  * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License 2.0 (the "License").  You may not use
      5  * this file except in compliance with the License.  You can obtain a copy
      6  * in the file LICENSE in the source distribution or at
      7  * https://www.openssl.org/source/license.html
      8  */
      9 
     10 #include <string.h>
     11 #include "helpers/ssltestlib.h"
     12 #include "testutil.h"
     13 
     14 static int docorrupt = 0;
     15 
     16 static void copy_flags(BIO *bio)
     17 {
     18     int flags;
     19     BIO *next = BIO_next(bio);
     20 
     21     flags = BIO_test_flags(next, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
     22     BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
     23     BIO_set_flags(bio, flags);
     24 }
     25 
     26 static int tls_corrupt_read(BIO *bio, char *out, int outl)
     27 {
     28     int ret;
     29     BIO *next = BIO_next(bio);
     30 
     31     ret = BIO_read(next, out, outl);
     32     copy_flags(bio);
     33 
     34     return ret;
     35 }
     36 
     37 static int tls_corrupt_write(BIO *bio, const char *in, int inl)
     38 {
     39     int ret;
     40     BIO *next = BIO_next(bio);
     41     char *copy;
     42 
     43     if (docorrupt) {
     44         if (!TEST_ptr(copy = OPENSSL_memdup(in, inl)))
     45             return 0;
     46         /* corrupt last bit of application data */
     47         copy[inl - 1] ^= 1;
     48         ret = BIO_write(next, copy, inl);
     49         OPENSSL_free(copy);
     50     } else {
     51         ret = BIO_write(next, in, inl);
     52     }
     53     copy_flags(bio);
     54 
     55     return ret;
     56 }
     57 
     58 static long tls_corrupt_ctrl(BIO *bio, int cmd, long num, void *ptr)
     59 {
     60     long ret;
     61     BIO *next = BIO_next(bio);
     62 
     63     if (next == NULL)
     64         return 0;
     65 
     66     switch (cmd) {
     67     case BIO_CTRL_DUP:
     68         ret = 0L;
     69         break;
     70     default:
     71         ret = BIO_ctrl(next, cmd, num, ptr);
     72         break;
     73     }
     74     return ret;
     75 }
     76 
     77 static int tls_corrupt_gets(BIO *bio, char *buf, int size)
     78 {
     79     /* We don't support this - not needed anyway */
     80     return -1;
     81 }
     82 
     83 static int tls_corrupt_puts(BIO *bio, const char *str)
     84 {
     85     /* We don't support this - not needed anyway */
     86     return -1;
     87 }
     88 
     89 static int tls_corrupt_new(BIO *bio)
     90 {
     91     BIO_set_init(bio, 1);
     92 
     93     return 1;
     94 }
     95 
     96 static int tls_corrupt_free(BIO *bio)
     97 {
     98     BIO_set_init(bio, 0);
     99 
    100     return 1;
    101 }
    102 
    103 #define BIO_TYPE_CUSTOM_FILTER (0x80 | BIO_TYPE_FILTER)
    104 
    105 static BIO_METHOD *method_tls_corrupt = NULL;
    106 
    107 /* Note: Not thread safe! */
    108 static const BIO_METHOD *bio_f_tls_corrupt_filter(void)
    109 {
    110     if (method_tls_corrupt == NULL) {
    111         method_tls_corrupt = BIO_meth_new(BIO_TYPE_CUSTOM_FILTER,
    112             "TLS corrupt filter");
    113         if (method_tls_corrupt == NULL
    114             || !BIO_meth_set_write(method_tls_corrupt, tls_corrupt_write)
    115             || !BIO_meth_set_read(method_tls_corrupt, tls_corrupt_read)
    116             || !BIO_meth_set_puts(method_tls_corrupt, tls_corrupt_puts)
    117             || !BIO_meth_set_gets(method_tls_corrupt, tls_corrupt_gets)
    118             || !BIO_meth_set_ctrl(method_tls_corrupt, tls_corrupt_ctrl)
    119             || !BIO_meth_set_create(method_tls_corrupt, tls_corrupt_new)
    120             || !BIO_meth_set_destroy(method_tls_corrupt, tls_corrupt_free))
    121             return NULL;
    122     }
    123     return method_tls_corrupt;
    124 }
    125 
    126 static void bio_f_tls_corrupt_filter_free(void)
    127 {
    128     BIO_meth_free(method_tls_corrupt);
    129 }
    130 
    131 /*
    132  * The test is supposed to be executed with RSA key, customarily
    133  * with apps/server.pem used even in other tests. For this reason
    134  * |cipher_list| is initialized with RSA ciphers' names. This
    135  * naturally means that if test is to be re-purposed for other
    136  * type of key, then NID_auth_* filter below would need adjustment.
    137  */
    138 static const char **cipher_list = NULL;
    139 
    140 static int setup_cipher_list(void)
    141 {
    142     SSL_CTX *ctx = NULL;
    143     SSL *ssl = NULL;
    144     STACK_OF(SSL_CIPHER) *sk_ciphers = NULL;
    145     int i, j, numciphers = 0;
    146 
    147     if (!TEST_ptr(ctx = SSL_CTX_new(TLS_server_method()))
    148         || !TEST_ptr(ssl = SSL_new(ctx))
    149         || !TEST_ptr(sk_ciphers = SSL_get1_supported_ciphers(ssl)))
    150         goto err;
    151 
    152     /*
    153      * The |cipher_list| will be filled only with names of RSA ciphers,
    154      * so that some of the allocated space will be wasted, but the loss
    155      * is deemed acceptable...
    156      */
    157     cipher_list = OPENSSL_malloc(sk_SSL_CIPHER_num(sk_ciphers) * sizeof(cipher_list[0]));
    158     if (!TEST_ptr(cipher_list))
    159         goto err;
    160 
    161     for (j = 0, i = 0; i < sk_SSL_CIPHER_num(sk_ciphers); i++) {
    162         const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(sk_ciphers, i);
    163 
    164         if (SSL_CIPHER_get_auth_nid(cipher) == NID_auth_rsa)
    165             cipher_list[j++] = SSL_CIPHER_get_name(cipher);
    166     }
    167     if (TEST_int_ne(j, 0))
    168         numciphers = j;
    169 
    170 err:
    171     sk_SSL_CIPHER_free(sk_ciphers);
    172     SSL_free(ssl);
    173     SSL_CTX_free(ctx);
    174 
    175     return numciphers;
    176 }
    177 
    178 static char *cert = NULL;
    179 static char *privkey = NULL;
    180 
    181 static int test_ssl_corrupt(int testidx)
    182 {
    183     static unsigned char junk[16000] = { 0 };
    184     SSL_CTX *sctx = NULL, *cctx = NULL;
    185     SSL *server = NULL, *client = NULL;
    186     BIO *c_to_s_fbio;
    187     int testresult = 0;
    188     STACK_OF(SSL_CIPHER) *ciphers;
    189     const SSL_CIPHER *currcipher;
    190     int err;
    191 
    192     docorrupt = 0;
    193 
    194     TEST_info("Starting #%d, %s", testidx, cipher_list[testidx]);
    195 
    196     if (!TEST_true(create_ssl_ctx_pair(NULL, TLS_server_method(),
    197             TLS_client_method(),
    198             TLS1_VERSION, 0,
    199             &sctx, &cctx, cert, privkey)))
    200         return 0;
    201 
    202     if (!TEST_true(SSL_CTX_set_dh_auto(sctx, 1))
    203         || !TEST_true(SSL_CTX_set_cipher_list(cctx, cipher_list[testidx]))
    204         || !TEST_true(SSL_CTX_set_ciphersuites(cctx, ""))
    205         || !TEST_ptr(ciphers = SSL_CTX_get_ciphers(cctx))
    206         || !TEST_int_eq(sk_SSL_CIPHER_num(ciphers), 1)
    207         || !TEST_ptr(currcipher = sk_SSL_CIPHER_value(ciphers, 0)))
    208         goto end;
    209 
    210     /*
    211      * No ciphers we are using are TLSv1.3 compatible so we should not attempt
    212      * to negotiate TLSv1.3
    213      */
    214     if (!TEST_true(SSL_CTX_set_max_proto_version(cctx, TLS1_2_VERSION)))
    215         goto end;
    216 
    217     if (!TEST_ptr(c_to_s_fbio = BIO_new(bio_f_tls_corrupt_filter())))
    218         goto end;
    219 
    220     /* BIO is freed by create_ssl_connection on error */
    221     if (!TEST_true(create_ssl_objects(sctx, cctx, &server, &client, NULL,
    222             c_to_s_fbio)))
    223         goto end;
    224 
    225     if (!TEST_true(create_ssl_connection(server, client, SSL_ERROR_NONE)))
    226         goto end;
    227 
    228     docorrupt = 1;
    229 
    230     if (!TEST_int_ge(SSL_write(client, junk, sizeof(junk)), 0))
    231         goto end;
    232 
    233     if (!TEST_int_lt(SSL_read(server, junk, sizeof(junk)), 0))
    234         goto end;
    235 
    236     do {
    237         err = ERR_get_error();
    238 
    239         if (err == 0) {
    240             TEST_error("Decryption failed or bad record MAC not seen");
    241             goto end;
    242         }
    243     } while (ERR_GET_REASON(err) != SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);
    244 
    245     testresult = 1;
    246 end:
    247     SSL_free(server);
    248     SSL_free(client);
    249     SSL_CTX_free(sctx);
    250     SSL_CTX_free(cctx);
    251     return testresult;
    252 }
    253 
    254 OPT_TEST_DECLARE_USAGE("certfile privkeyfile\n")
    255 
    256 int setup_tests(void)
    257 {
    258     int n;
    259 
    260     if (!test_skip_common_options()) {
    261         TEST_error("Error parsing test options\n");
    262         return 0;
    263     }
    264 
    265     if (!TEST_ptr(cert = test_get_argument(0))
    266         || !TEST_ptr(privkey = test_get_argument(1)))
    267         return 0;
    268 
    269     n = setup_cipher_list();
    270     if (n > 0)
    271         ADD_ALL_TESTS(test_ssl_corrupt, n);
    272     return 1;
    273 }
    274 
    275 void cleanup_tests(void)
    276 {
    277     bio_f_tls_corrupt_filter_free();
    278     OPENSSL_free(cipher_list);
    279 }
    280