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/*
* Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include "helpers/ssltestlib.h"
#include "testutil.h"
static char *cert = NULL;
static char *privkey = NULL;
#define TEST_PLAINTEXT_OVERFLOW_OK 0
#define TEST_PLAINTEXT_OVERFLOW_NOT_OK 1
#define TEST_ENCRYPTED_OVERFLOW_TLS1_3_OK 2
#define TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK 3
#define TEST_ENCRYPTED_OVERFLOW_TLS1_2_OK 4
#define TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK 5
#define TOTAL_RECORD_OVERFLOW_TESTS 6
static int write_record(BIO *b, size_t len, int rectype, int recversion)
{
unsigned char header[SSL3_RT_HEADER_LENGTH];
size_t written;
unsigned char buf[256];
memset(buf, 0, sizeof(buf));
header[0] = rectype;
header[1] = (recversion >> 8) & 0xff;
header[2] = recversion & 0xff;
header[3] = (len >> 8) & 0xff;
header[4] = len & 0xff;
if (!BIO_write_ex(b, header, SSL3_RT_HEADER_LENGTH, &written)
|| written != SSL3_RT_HEADER_LENGTH)
return 0;
while (len > 0) {
size_t outlen;
if (len > sizeof(buf))
outlen = sizeof(buf);
else
outlen = len;
if (!BIO_write_ex(b, buf, outlen, &written)
|| written != outlen)
return 0;
len -= outlen;
}
return 1;
}
static int fail_due_to_record_overflow(int enc)
{
long err = ERR_peek_error();
int reason;
if (enc)
reason = SSL_R_ENCRYPTED_LENGTH_TOO_LONG;
else
reason = SSL_R_DATA_LENGTH_TOO_LONG;
if (ERR_GET_LIB(err) == ERR_LIB_SSL
&& ERR_GET_REASON(err) == reason)
return 1;
return 0;
}
static int test_record_overflow(int idx)
{
SSL_CTX *cctx = NULL, *sctx = NULL;
SSL *clientssl = NULL, *serverssl = NULL;
int testresult = 0;
size_t len = 0;
size_t written;
int overf_expected;
unsigned char buf;
BIO *serverbio;
int recversion;
#ifdef OPENSSL_NO_TLS1_2
if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_OK
|| idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK)
return 1;
#endif
#if defined(OPENSSL_NO_TLS1_3) \
|| (defined(OPENSSL_NO_EC) && defined(OPENSSL_NO_DH))
if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_OK
|| idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK)
return 1;
#endif
if (!TEST_true(create_ssl_ctx_pair(NULL, TLS_server_method(),
TLS_client_method(),
TLS1_VERSION, 0,
&sctx, &cctx, cert, privkey)))
goto end;
if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_OK
|| idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK) {
len = SSL3_RT_MAX_ENCRYPTED_LENGTH;
#ifndef OPENSSL_NO_COMP
len -= SSL3_RT_MAX_COMPRESSED_OVERHEAD;
#endif
SSL_CTX_set_max_proto_version(sctx, TLS1_2_VERSION);
} else if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_OK
|| idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK) {
len = SSL3_RT_MAX_TLS13_ENCRYPTED_LENGTH;
}
if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
NULL, NULL)))
goto end;
serverbio = SSL_get_rbio(serverssl);
if (idx == TEST_PLAINTEXT_OVERFLOW_OK
|| idx == TEST_PLAINTEXT_OVERFLOW_NOT_OK) {
len = SSL3_RT_MAX_PLAIN_LENGTH;
if (idx == TEST_PLAINTEXT_OVERFLOW_NOT_OK)
len++;
if (!TEST_true(write_record(serverbio, len,
SSL3_RT_HANDSHAKE, TLS1_VERSION)))
goto end;
if (!TEST_int_le(SSL_accept(serverssl), 0))
goto end;
overf_expected = (idx == TEST_PLAINTEXT_OVERFLOW_OK) ? 0 : 1;
if (!TEST_int_eq(fail_due_to_record_overflow(0), overf_expected))
goto end;
goto success;
}
if (!TEST_true(create_ssl_connection(serverssl, clientssl,
SSL_ERROR_NONE)))
goto end;
if (idx == TEST_ENCRYPTED_OVERFLOW_TLS1_2_NOT_OK
|| idx == TEST_ENCRYPTED_OVERFLOW_TLS1_3_NOT_OK) {
overf_expected = 1;
len++;
} else {
overf_expected = 0;
}
recversion = TLS1_2_VERSION;
if (!TEST_true(write_record(serverbio, len, SSL3_RT_APPLICATION_DATA,
recversion)))
goto end;
if (!TEST_false(SSL_read_ex(serverssl, &buf, sizeof(buf), &written)))
goto end;
if (!TEST_int_eq(fail_due_to_record_overflow(1), overf_expected))
goto end;
success:
testresult = 1;
end:
SSL_free(serverssl);
SSL_free(clientssl);
SSL_CTX_free(sctx);
SSL_CTX_free(cctx);
return testresult;
}
OPT_TEST_DECLARE_USAGE("certfile privkeyfile\n")
int setup_tests(void)
{
if (!test_skip_common_options()) {
TEST_error("Error parsing test options\n");
return 0;
}
if (!TEST_ptr(cert = test_get_argument(0))
|| !TEST_ptr(privkey = test_get_argument(1)))
return 0;
ADD_ALL_TESTS(test_record_overflow, TOTAL_RECORD_OVERFLOW_TESTS);
return 1;
}
void cleanup_tests(void)
{
bio_s_mempacket_test_free();
}
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