test/recordlentest.c

   1 /*
   2  * Copyright 2017-2020 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
  12 #include "ssltestlib.h"
  13 #include "testutil.h"
  14
  15 static char *cert = NULL;
  16 static char *privkey = NULL;
  17
  18 #define TEST_PLAINTEXT_OVERFLOW_OK      0
  19 #define TEST_PLAINTEXT_OVERFLOW_NOT_OK  1
  20 #define TEST_ENCRYPTED_OVERFLOW_TLS1_3_OK       2
  21 #define TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK   3
  22 #define TEST_ENCRYPTED_OVERFLOW_TLS1_2_OK       4
  23 #define TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK   5
  24
  25 #define TOTAL_RECORD_OVERFLOW_TESTS 6
  26
  27 static int write_record(BIO *b, size_t len, int rectype, int recversion)
  28 {
  29     unsigned char header[SSL3_RT_HEADER_LENGTH];
  30     size_t written;
  31     unsigned char buf[256];
  32
  33     memset(buf, 0, sizeof(buf));
  34
  35     header[0] = rectype;
  36     header[1] = (recversion >> 8) & 0xff;
  37     header[2] = recversion & 0xff;
  38     header[3] = (len >> 8) & 0xff;
  39     header[4] = len & 0xff;
  40
  41     if (!BIO_write_ex(b, header, SSL3_RT_HEADER_LENGTH, &written)
  42             || written != SSL3_RT_HEADER_LENGTH)
  43         return 0;
  44
  45     while (len > 0) {
  46         size_t outlen;
  47
  48         if (len > sizeof(buf))
  49             outlen = sizeof(buf);
  50         else
  51             outlen = len;
  52
  53         if (!BIO_write_ex(b, buf, outlen, &written)
  54                 || written != outlen)
  55             return 0;
  56
  57         len -= outlen;
  58     }
  59
  60     return 1;
  61 }
  62
  63 static int fail_due_to_record_overflow(int enc)
  64 {
  65     long err = ERR_peek_error();
  66     int reason;
  67
  68     if (enc)
  69         reason = SSL_R_ENCRYPTED_LENGTH_TOO_LONG;
  70     else
  71         reason = SSL_R_DATA_LENGTH_TOO_LONG;
  72
  73     if (ERR_GET_LIB(err) == ERR_LIB_SSL
  74             && ERR_GET_REASON(err) == reason)
  75         return 1;
  76
  77     return 0;
  78 }
  79
  80 static int test_record_overflow(int idx)
  81 {
  82     SSL_CTX *cctx = NULL, *sctx = NULL;
  83     SSL *clientssl = NULL, *serverssl = NULL;
  84     int testresult = 0;
  85     size_t len = 0;
  86     size_t written;
  87     int overf_expected;
  88     unsigned char buf;
  89     BIO *serverbio;
  90     int recversion;
  91
  92 #ifdef OPENSSL_NO_TLS1_2
  93     if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_OK
  94             || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK)
  95         return 1;
  96 #endif
  97 #ifdef OPENSSL_NO_TLS1_3
  98     if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_OK
  99             || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK)
 100         return 1;
 101 #endif
 102
 103     ERR_clear_error();
 104
 105     if (!TEST_true(create_ssl_ctx_pair(NULL, TLS_server_method(),
 106                                        TLS_client_method(),
 107                                        TLS1_VERSION, 0,
 108                                        &sctx, &cctx, cert, privkey)))
 109         goto end;
 110
 111     if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_OK
 112             || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK) {
 113         len = SSL3_RT_MAX_ENCRYPTED_LENGTH;
 114 #ifndef OPENSSL_NO_COMP
 115         len -= SSL3_RT_MAX_COMPRESSED_OVERHEAD;
 116 #endif
 117         SSL_CTX_set_max_proto_version(sctx, TLS1_2_VERSION);
 118     } else if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_OK
 119                || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK) {
 120         len = SSL3_RT_MAX_TLS13_ENCRYPTED_LENGTH;
 121     }
 122
 123     if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
 124                                       NULL, NULL)))
 125         goto end;
 126
 127     serverbio = SSL_get_rbio(serverssl);
 128
 129     if (idx == TEST_PLAINTEXT_OVERFLOW_OK
 130             || idx == TEST_PLAINTEXT_OVERFLOW_NOT_OK) {
 131         len = SSL3_RT_MAX_PLAIN_LENGTH;
 132
 133         if (idx == TEST_PLAINTEXT_OVERFLOW_NOT_OK)
 134             len++;
 135
 136         if (!TEST_true(write_record(serverbio, len,
 137                                     SSL3_RT_HANDSHAKE, TLS1_VERSION)))
 138             goto end;
 139
 140         if (!TEST_int_le(SSL_accept(serverssl), 0))
 141             goto end;
 142
 143         overf_expected = (idx == TEST_PLAINTEXT_OVERFLOW_OK) ? 0 : 1;
 144         if (!TEST_int_eq(fail_due_to_record_overflow(0), overf_expected))
 145             goto end;
 146
 147         goto success;
 148     }
 149
 150     if (!TEST_true(create_ssl_connection(serverssl, clientssl,
 151                                          SSL_ERROR_NONE)))
 152         goto end;
 153
 154     if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK
 155             || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK) {
 156         overf_expected = 1;
 157         len++;
 158     } else {
 159         overf_expected = 0;
 160     }
 161
 162     recversion = TLS1_2_VERSION;
 163
 164     if (!TEST_true(write_record(serverbio, len, SSL3_RT_APPLICATION_DATA,
 165                                 recversion)))
 166         goto end;
 167
 168     if (!TEST_false(SSL_read_ex(serverssl, &buf, sizeof(buf), &written)))
 169         goto end;
 170
 171     if (!TEST_int_eq(fail_due_to_record_overflow(1), overf_expected))
 172         goto end;
 173
 174  success:
 175     testresult = 1;
 176
 177  end:
 178     SSL_free(serverssl);
 179     SSL_free(clientssl);
 180     SSL_CTX_free(sctx);
 181     SSL_CTX_free(cctx);
 182     return testresult;
 183 }
 184
 185 OPT_TEST_DECLARE_USAGE("certfile privkeyfile\n")
 186
 187 int setup_tests(void)
 188 {
 189     if (!test_skip_common_options()) {
 190         TEST_error("Error parsing test options\n");
 191         return 0;
 192     }
 193
 194     if (!TEST_ptr(cert = test_get_argument(0))
 195             || !TEST_ptr(privkey = test_get_argument(1)))
 196         return 0;
 197
 198     ADD_ALL_TESTS(test_record_overflow, TOTAL_RECORD_OVERFLOW_TESTS);
 199     return 1;
 200 }
 201
 202 void cleanup_tests(void)
 203 {
 204     bio_s_mempacket_test_free();
 205 }