test/recordlentest.c

   1 /*
   2  * Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 #include "test_main_custom.h"
  15
  16 static char *cert = NULL;
  17 static char *privkey = NULL;
  18
  19 #define TEST_PLAINTEXT_OVERFLOW_OK      0
  20 #define TEST_PLAINTEXT_OVERFLOW_NOT_OK  1
  21 #define TEST_ENCRYPTED_OVERFLOW_TLS1_3_OK       2
  22 #define TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK   3
  23 #define TEST_ENCRYPTED_OVERFLOW_TLS1_2_OK       4
  24 #define TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK   5
  25
  26 #define TOTAL_RECORD_OVERFLOW_TESTS 6
  27
  28 static int write_record(BIO *b, size_t len, int rectype, int recversion)
  29 {
  30     unsigned char header[SSL3_RT_HEADER_LENGTH];
  31     size_t written;
  32     unsigned char buf[256];
  33
  34     memset(buf, 0, sizeof(buf));
  35
  36     header[0] = rectype;
  37     header[1] = (recversion >> 8) & 0xff;
  38     header[2] = recversion & 0xff;
  39     header[3] = (len >> 8) & 0xff;
  40     header[4] = len & 0xff;
  41
  42     if (!BIO_write_ex(b, header, SSL3_RT_HEADER_LENGTH, &written)
  43             || written != SSL3_RT_HEADER_LENGTH)
  44         return 0;
  45
  46     while (len > 0) {
  47         size_t outlen;
  48
  49         if (len > sizeof(buf))
  50             outlen = sizeof(buf);
  51         else
  52             outlen = len;
  53
  54         if (!BIO_write_ex(b, buf, outlen, &written)
  55                 || written != outlen)
  56             return 0;
  57
  58         len -= outlen;
  59     }
  60
  61     return 1;
  62 }
  63
  64 static int fail_due_to_record_overflow(int enc)
  65 {
  66     long err = ERR_peek_error();
  67     int reason;
  68
  69     if (enc)
  70         reason = SSL_R_ENCRYPTED_LENGTH_TOO_LONG;
  71     else
  72         reason = SSL_R_DATA_LENGTH_TOO_LONG;
  73
  74     if (ERR_GET_LIB(err) == ERR_LIB_SSL
  75             && ERR_GET_REASON(err) == reason)
  76         return 1;
  77
  78     return 0;
  79 }
  80
  81 static int test_record_plain_overflow(int idx)
  82 {
  83     SSL_CTX *cctx = NULL, *sctx = NULL;
  84     SSL *clientssl = NULL, *serverssl = NULL;
  85     int testresult = 0;
  86     size_t len = 0;
  87     size_t written;
  88     int overf_expected;
  89     unsigned char buf;
  90     BIO *serverbio;
  91     int recversion;
  92
  93 #ifdef OPENSSL_NO_TLS1_2
  94     if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_OK
  95             || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK)
  96         return 1;
  97 #endif
  98 #ifdef OPENSSL_NO_TLS1_3
  99     if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_OK
 100             || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK)
 101         return 1;
 102 #endif
 103
 104     ERR_clear_error();
 105
 106     if (!create_ssl_ctx_pair(TLS_server_method(), TLS_client_method(), &sctx,
 107                              &cctx, cert, privkey)) {
 108         printf("Unable to create SSL_CTX pair\n");
 109         goto end;
 110     }
 111
 112     if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_OK
 113             || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK) {
 114         len = SSL3_RT_MAX_ENCRYPTED_LENGTH - SSL3_RT_MAX_COMPRESSED_OVERHEAD;
 115         SSL_CTX_set_max_proto_version(sctx, TLS1_2_VERSION);
 116     } else if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_OK
 117                || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK) {
 118         len = SSL3_RT_MAX_TLS13_ENCRYPTED_LENGTH;
 119     }
 120
 121     if (!create_ssl_objects(sctx, cctx, &serverssl, &clientssl, NULL, NULL)) {
 122         printf("Unable to create SSL objects\n");
 123         goto end;
 124     }
 125
 126     serverbio = SSL_get_rbio(serverssl);
 127
 128     if (idx == TEST_PLAINTEXT_OVERFLOW_OK
 129             || idx == TEST_PLAINTEXT_OVERFLOW_NOT_OK) {
 130         len = SSL3_RT_MAX_PLAIN_LENGTH;
 131
 132         if (idx == TEST_PLAINTEXT_OVERFLOW_NOT_OK)
 133             len++;
 134
 135         if (!write_record(serverbio, len, SSL3_RT_HANDSHAKE, TLS1_VERSION)) {
 136             printf("Unable to write plaintext record\n");
 137             goto end;
 138         }
 139
 140         if (SSL_accept(serverssl) > 0) {
 141             printf("Unexpected success reading plaintext record\n");
 142             goto end;
 143         }
 144
 145         overf_expected = (idx == TEST_PLAINTEXT_OVERFLOW_OK) ? 0 : 1;
 146         if (fail_due_to_record_overflow(0) != overf_expected) {
 147             printf("Unexpected error value received\n");
 148             goto end;
 149         }
 150
 151         goto success;
 152     }
 153
 154     if (!create_ssl_connection(serverssl, clientssl, SSL_ERROR_NONE)) {
 155         printf("Unable to create SSL connection\n");
 156         goto end;
 157     }
 158
 159     if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK
 160             || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK) {
 161         overf_expected = 1;
 162         len++;
 163     } else {
 164         overf_expected = 0;
 165     }
 166
 167     if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_OK
 168             || idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK)
 169         recversion = TLS1_VERSION;
 170     else
 171         recversion = TLS1_2_VERSION;
 172
 173     if (!write_record(serverbio, len, SSL3_RT_APPLICATION_DATA, recversion)) {
 174         printf("Unable to write encryprted record\n");
 175         goto end;
 176     }
 177
 178     if (SSL_read_ex(serverssl, &buf, sizeof(buf), &written)) {
 179         printf("Unexpected success reading encrypted record\n");
 180         goto end;
 181     }
 182
 183     if (fail_due_to_record_overflow(1) != overf_expected) {
 184         printf("Unexpected error value received\n");
 185         goto end;
 186     }
 187
 188  success:
 189     testresult = 1;
 190
 191  end:
 192     if(!testresult)
 193         ERR_print_errors_fp(stdout);
 194     SSL_free(serverssl);
 195     SSL_free(clientssl);
 196     SSL_CTX_free(sctx);
 197     SSL_CTX_free(cctx);
 198
 199     return testresult;
 200 }
 201
 202 int test_main(int argc, char *argv[])
 203 {
 204     int testresult = 1;
 205
 206     if (argc != 3) {
 207         printf("Invalid argument count\n");
 208         return 1;
 209     }
 210
 211     cert = argv[1];
 212     privkey = argv[2];
 213
 214     ADD_ALL_TESTS(test_record_plain_overflow, TOTAL_RECORD_OVERFLOW_TESTS);
 215
 216     testresult = run_tests(argv[0]);
 217
 218     bio_s_mempacket_test_free();
 219
 220     return testresult;
 221 }