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/*
* Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (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 "ssltestlib.h"
#include "testutil.h"
static void copy_flags(BIO *bio)
{
int flags;
BIO *next = BIO_next(bio);
flags = BIO_test_flags(next, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
BIO_set_flags(bio, flags);
}
static int tls_corrupt_read(BIO *bio, char *out, int outl)
{
int ret;
BIO *next = BIO_next(bio);
ret = BIO_read(next, out, outl);
copy_flags(bio);
return ret;
}
static int tls_corrupt_write(BIO *bio, const char *in, int inl)
{
int ret;
BIO *next = BIO_next(bio);
char *copy;
if (in[0] == SSL3_RT_APPLICATION_DATA) {
copy = BUF_memdup(in, inl);
TEST_check(copy != NULL);
/* corrupt last bit of application data */
copy[inl-1] ^= 1;
ret = BIO_write(next, copy, inl);
OPENSSL_free(copy);
} else {
ret = BIO_write(next, in, inl);
}
copy_flags(bio);
return ret;
}
static long tls_corrupt_ctrl(BIO *bio, int cmd, long num, void *ptr)
{
long ret;
BIO *next = BIO_next(bio);
if (next == NULL)
return 0;
switch (cmd) {
case BIO_CTRL_DUP:
ret = 0L;
break;
default:
ret = BIO_ctrl(next, cmd, num, ptr);
break;
}
return ret;
}
static int tls_corrupt_gets(BIO *bio, char *buf, int size)
{
/* We don't support this - not needed anyway */
return -1;
}
static int tls_corrupt_puts(BIO *bio, const char *str)
{
/* We don't support this - not needed anyway */
return -1;
}
static int tls_corrupt_new(BIO *bio)
{
BIO_set_init(bio, 1);
return 1;
}
static int tls_corrupt_free(BIO *bio)
{
BIO_set_init(bio, 0);
return 1;
}
#define BIO_TYPE_CUSTOM_FILTER (0x80 | BIO_TYPE_FILTER)
static BIO_METHOD *method_tls_corrupt = NULL;
/* Note: Not thread safe! */
static const BIO_METHOD *bio_f_tls_corrupt_filter(void)
{
if (method_tls_corrupt == NULL) {
method_tls_corrupt = BIO_meth_new(BIO_TYPE_CUSTOM_FILTER,
"TLS corrupt filter");
if ( method_tls_corrupt == NULL
|| !BIO_meth_set_write(method_tls_corrupt, tls_corrupt_write)
|| !BIO_meth_set_read(method_tls_corrupt, tls_corrupt_read)
|| !BIO_meth_set_puts(method_tls_corrupt, tls_corrupt_puts)
|| !BIO_meth_set_gets(method_tls_corrupt, tls_corrupt_gets)
|| !BIO_meth_set_ctrl(method_tls_corrupt, tls_corrupt_ctrl)
|| !BIO_meth_set_create(method_tls_corrupt, tls_corrupt_new)
|| !BIO_meth_set_destroy(method_tls_corrupt, tls_corrupt_free))
return NULL;
}
return method_tls_corrupt;
}
static void bio_f_tls_corrupt_filter_free(void)
{
BIO_meth_free(method_tls_corrupt);
}
/*
* The test is supposed to be executed with RSA key, customarily
* with apps/server.pem used even in other tests. For this reason
* |cipher_list| is initialized with RSA ciphers' names. This
* naturally means that if test is to be re-purposed for other
* type of key, then NID_auth_* filter below would need adjustment.
*/
static const char **cipher_list = NULL;
static int setup_cipher_list()
{
SSL_CTX *ctx = NULL;
SSL *ssl = NULL;
static STACK_OF(SSL_CIPHER) *sk_ciphers = NULL;
int i, numciphers;
ctx = SSL_CTX_new(TLS_server_method());
TEST_check(ctx != NULL);
ssl = SSL_new(ctx);
TEST_check(ssl != NULL);
sk_ciphers = SSL_get1_supported_ciphers(ssl);
TEST_check(sk_ciphers != NULL);
/*
* The |cipher_list| will be filled only with names of RSA ciphers,
* so that some of the allocated space will be wasted, but the loss
* is deemed acceptable...
*/
cipher_list = OPENSSL_malloc(sk_SSL_CIPHER_num(sk_ciphers) *
sizeof(cipher_list[0]));
TEST_check(cipher_list != NULL);
for (numciphers = 0, i = 0; i < sk_SSL_CIPHER_num(sk_ciphers); i++) {
const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(sk_ciphers, i);
if (SSL_CIPHER_get_auth_nid(cipher) == NID_auth_rsa)
cipher_list[numciphers++] = SSL_CIPHER_get_name(cipher);
}
TEST_check(numciphers != 0);
sk_SSL_CIPHER_free(sk_ciphers);
SSL_free(ssl);
SSL_CTX_free(ctx);
return numciphers;
}
static char *cert = NULL;
static char *privkey = NULL;
static int test_ssl_corrupt(int testidx)
{
SSL_CTX *sctx = NULL, *cctx = NULL;
SSL *server = NULL, *client = NULL;
BIO *c_to_s_fbio;
int testresult = 0;
static unsigned char junk[16000] = { 0 };
STACK_OF(SSL_CIPHER) *ciphers;
const SSL_CIPHER *currcipher;
printf("Starting Test %d, %s\n", testidx, cipher_list[testidx]);
if (!create_ssl_ctx_pair(TLS_server_method(), TLS_client_method(), &sctx,
&cctx, cert, privkey)) {
printf("Unable to create SSL_CTX pair\n");
return 0;
}
if (!SSL_CTX_set_cipher_list(cctx, cipher_list[testidx])) {
printf("Failed setting cipher list\n");
goto end;
}
ciphers = SSL_CTX_get_ciphers(cctx);
if (ciphers == NULL || sk_SSL_CIPHER_num(ciphers) != 1) {
printf("Unexpected ciphers set\n");
goto end;
}
currcipher = sk_SSL_CIPHER_value(ciphers, 0);
if (currcipher == NULL) {
printf("Failed getting the current cipher\n");
goto end;
}
/*
* If we haven't got a TLSv1.3 cipher, then we mustn't attempt to use
* TLSv1.3. Version negotiation happens before cipher selection, so we will
* get a "no shared cipher" error.
*/
if (strcmp(SSL_CIPHER_get_version(currcipher), "TLSv1.3") != 0) {
if (!SSL_CTX_set_max_proto_version(cctx, TLS1_2_VERSION)) {
printf("Failed setting max protocol version\n");
goto end;
}
}
c_to_s_fbio = BIO_new(bio_f_tls_corrupt_filter());
if (c_to_s_fbio == NULL) {
printf("Failed to create filter BIO\n");
goto end;
}
/* BIO is freed by create_ssl_connection on error */
if (!create_ssl_objects(sctx, cctx, &server, &client, NULL,
c_to_s_fbio)) {
printf("Unable to create SSL objects\n");
ERR_print_errors_fp(stdout);
goto end;
}
if (!create_ssl_connection(server, client)) {
printf("Unable to create SSL connection\n");
ERR_print_errors_fp(stdout);
goto end;
}
if (SSL_write(client, junk, sizeof(junk)) < 0) {
printf("Unable to SSL_write\n");
ERR_print_errors_fp(stdout);
goto end;
}
if (SSL_read(server, junk, sizeof(junk)) >= 0) {
printf("Read should have failed with \"bad record mac\"\n");
goto end;
}
if (ERR_GET_REASON(ERR_peek_error()) !=
SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC) {
ERR_print_errors_fp(stdout);
goto end;
}
testresult = 1;
end:
SSL_free(server);
SSL_free(client);
SSL_CTX_free(sctx);
SSL_CTX_free(cctx);
return testresult;
}
int main(int argc, char *argv[])
{
BIO *err = NULL;
int testresult = 1;
if (argc != 3) {
printf(
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