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openssl/test/dtlsv1listentest.c
Matt Caswell 65e2d67254 Simplify and rename SSL_set_rbio() and SSL_set_wbio() 
SSL_set_rbio() and SSL_set_wbio() are new functions in 1.1.0 and really
should be called SSL_set0_rbio() and SSL_set0_wbio(). The old
implementation was not consistent with what "set0" means though as there
were special cases around what happens if the rbio and wbio are the same.
We were only ever taking one reference on the BIO, and checking everywhere
whether the rbio and wbio are the same so as not to double free.

A better approach is to rename the functions to SSL_set0_rbio() and
SSL_set0_wbio(). If an existing BIO is present it is *always* freed
regardless of whether the rbio and wbio are the same or not. It is
therefore the callers responsibility to ensure that a reference is taken
for *each* usage, i.e. one for the rbio and one for the wbio.

The legacy function SSL_set_bio() takes both the rbio and wbio in one go
and sets them both. We can wrap up the old behaviour in the implementation
of that function, i.e. previously if the rbio and wbio are the same in the
call to this function then the caller only needed to ensure one reference
was passed. This behaviour is retained by internally upping the ref count.

This commit was inspired by BoringSSL commit f715c423224.

RT#4572

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-07-29 14:09:57 +01:00

427 lines
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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 <openssl/ssl.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/conf.h>
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include "e_os.h"
#ifndef OPENSSL_NO_SOCK
/* Just a ClientHello without a cookie */
static const unsigned char clienthello_nocookie[] = {
0x16, /* Handshake */
0xFE, 0xFF, /* DTLSv1.0 */
0x00, 0x00, /* Epoch */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Record sequence number */
0x00, 0x3A, /* Record Length */
0x01, /* ClientHello */
0x00, 0x00, 0x2E, /* Message length */
0x00, 0x00, /* Message sequence */
0x00, 0x00, 0x00, /* Fragment offset */
0x00, 0x00, 0x2E, /* Fragment length */
0xFE, 0xFD, /* DTLSv1.2 */
0xCA, 0x18, 0x9F, 0x76, 0xEC, 0x57, 0xCE, 0xE5, 0xB3, 0xAB, 0x79, 0x90,
0xAD, 0xAC, 0x6E, 0xD1, 0x58, 0x35, 0x03, 0x97, 0x16, 0x10, 0x82, 0x56,
0xD8, 0x55, 0xFF, 0xE1, 0x8A, 0xA3, 0x2E, 0xF6, /* Random */
0x00, /* Session id len */
0x00, /* Cookie len */
0x00, 0x04, /* Ciphersuites len */
0x00, 0x2f, /* AES128-SHA */
0x00, 0xff, /* Empty reneg info SCSV */
0x01, /* Compression methods len */
0x00, /* Null compression */
0x00, 0x00 /* Extensions len */
};
/* First fragment of a ClientHello without a cookie */
static const unsigned char clienthello_nocookie_frag[] = {
0x16, /* Handshake */
0xFE, 0xFF, /* DTLSv1.0 */
0x00, 0x00, /* Epoch */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Record sequence number */
0x00, 0x30, /* Record Length */
0x01, /* ClientHello */
0x00, 0x00, 0x2E, /* Message length */
0x00, 0x00, /* Message sequence */
0x00, 0x00, 0x00, /* Fragment offset */
0x00, 0x00, 0x24, /* Fragment length */
0xFE, 0xFD, /* DTLSv1.2 */
0xCA, 0x18, 0x9F, 0x76, 0xEC, 0x57, 0xCE, 0xE5, 0xB3, 0xAB, 0x79, 0x90,
0xAD, 0xAC, 0x6E, 0xD1, 0x58, 0x35, 0x03, 0x97, 0x16, 0x10, 0x82, 0x56,
0xD8, 0x55, 0xFF, 0xE1, 0x8A, 0xA3, 0x2E, 0xF6, /* Random */
0x00, /* Session id len */
0x00 /* Cookie len */
};
/* First fragment of a ClientHello which is too short */
static const unsigned char clienthello_nocookie_short[] = {
0x16, /* Handshake */
0xFE, 0xFF, /* DTLSv1.0 */
0x00, 0x00, /* Epoch */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Record sequence number */
0x00, 0x2F, /* Record Length */
0x01, /* ClientHello */
0x00, 0x00, 0x2E, /* Message length */
0x00, 0x00, /* Message sequence */
0x00, 0x00, 0x00, /* Fragment offset */
0x00, 0x00, 0x23, /* Fragment length */
0xFE, 0xFD, /* DTLSv1.2 */
0xCA, 0x18, 0x9F, 0x76, 0xEC, 0x57, 0xCE, 0xE5, 0xB3, 0xAB, 0x79, 0x90,
0xAD, 0xAC, 0x6E, 0xD1, 0x58, 0x35, 0x03, 0x97, 0x16, 0x10, 0x82, 0x56,
0xD8, 0x55, 0xFF, 0xE1, 0x8A, 0xA3, 0x2E, 0xF6, /* Random */
0x00 /* Session id len */
};
/* Second fragment of a ClientHello */
static const unsigned char clienthello_2ndfrag[] = {
0x16, /* Handshake */
0xFE, 0xFF, /* DTLSv1.0 */
0x00, 0x00, /* Epoch */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Record sequence number */
0x00, 0x38, /* Record Length */
0x01, /* ClientHello */
0x00, 0x00, 0x2E, /* Message length */
0x00, 0x00, /* Message sequence */
0x00, 0x00, 0x02, /* Fragment offset */
0x00, 0x00, 0x2C, /* Fragment length */
/* Version skipped - sent in first fragment */
0xCA, 0x18, 0x9F, 0x76, 0xEC, 0x57, 0xCE, 0xE5, 0xB3, 0xAB, 0x79, 0x90,
0xAD, 0xAC, 0x6E, 0xD1, 0x58, 0x35, 0x03, 0x97, 0x16, 0x10, 0x82, 0x56,
0xD8, 0x55, 0xFF, 0xE1, 0x8A, 0xA3, 0x2E, 0xF6, /* Random */
0x00, /* Session id len */
0x00, /* Cookie len */
0x00, 0x04, /* Ciphersuites len */
0x00, 0x2f, /* AES128-SHA */
0x00, 0xff, /* Empty reneg info SCSV */
0x01, /* Compression methods len */
0x00, /* Null compression */
0x00, 0x00 /* Extensions len */
};
/* A ClientHello with a good cookie */
static const unsigned char clienthello_cookie[] = {
0x16, /* Handshake */
0xFE, 0xFF, /* DTLSv1.0 */
0x00, 0x00, /* Epoch */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Record sequence number */
0x00, 0x4E, /* Record Length */
0x01, /* ClientHello */
0x00, 0x00, 0x42, /* Message length */
0x00, 0x00, /* Message sequence */
0x00, 0x00, 0x00, /* Fragment offset */
0x00, 0x00, 0x42, /* Fragment length */
0xFE, 0xFD, /* DTLSv1.2 */
0xCA, 0x18, 0x9F, 0x76, 0xEC, 0x57, 0xCE, 0xE5, 0xB3, 0xAB, 0x79, 0x90,
0xAD, 0xAC, 0x6E, 0xD1, 0x58, 0x35, 0x03, 0x97, 0x16, 0x10, 0x82, 0x56,
0xD8, 0x55, 0xFF, 0xE1, 0x8A, 0xA3, 0x2E, 0xF6, /* Random */
0x00, /* Session id len */
0x14, /* Cookie len */
0x00, 0x01, 0x02, 0x03, 0x04, 005, 0x06, 007, 0x08, 0x09, 0x0A, 0x0B, 0x0C,
0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, /* Cookie */
0x00, 0x04, /* Ciphersuites len */
0x00, 0x2f, /* AES128-SHA */
0x00, 0xff, /* Empty reneg info SCSV */
0x01, /* Compression methods len */
0x00, /* Null compression */
0x00, 0x00 /* Extensions len */
};
/* A fragmented ClientHello with a good cookie */
static const unsigned char clienthello_cookie_frag[] = {
0x16, /* Handshake */
0xFE, 0xFF, /* DTLSv1.0 */
0x00, 0x00, /* Epoch */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Record sequence number */
0x00, 0x44, /* Record Length */
0x01, /* ClientHello */
0x00, 0x00, 0x42, /* Message length */
0x00, 0x00, /* Message sequence */
0x00, 0x00, 0x00, /* Fragment offset */
0x00, 0x00, 0x38, /* Fragment length */
0xFE, 0xFD, /* DTLSv1.2 */
0xCA, 0x18, 0x9F, 0x76, 0xEC, 0x57, 0xCE, 0xE5, 0xB3, 0xAB, 0x79, 0x90,
0xAD, 0xAC, 0x6E, 0xD1, 0x58, 0x35, 0x03, 0x97, 0x16, 0x10, 0x82, 0x56,
0xD8, 0x55, 0xFF, 0xE1, 0x8A, 0xA3, 0x2E, 0xF6, /* Random */
0x00, /* Session id len */
0x14, /* Cookie len */
0x00, 0x01, 0x02, 0x03, 0x04, 005, 0x06, 007, 0x08, 0x09, 0x0A, 0x0B, 0x0C,
0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13 /* Cookie */
};
/* A ClientHello with a bad cookie */
static const unsigned char clienthello_badcookie[] = {
0x16, /* Handshake */
0xFE, 0xFF, /* DTLSv1.0 */
0x00, 0x00, /* Epoch */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Record sequence number */
0x00, 0x4E, /* Record Length */
0x01, /* ClientHello */
0x00, 0x00, 0x42, /* Message length */
0x00, 0x00, /* Message sequence */
0x00, 0x00, 0x00, /* Fragment offset */
0x00, 0x00, 0x42, /* Fragment length */
0xFE, 0xFD, /* DTLSv1.2 */
0xCA, 0x18, 0x9F, 0x76, 0xEC, 0x57, 0xCE, 0xE5, 0xB3, 0xAB, 0x79, 0x90,
0xAD, 0xAC, 0x6E, 0xD1, 0x58, 0x35, 0x03, 0x97, 0x16, 0x10, 0x82, 0x56,
0xD8, 0x55, 0xFF, 0xE1, 0x8A, 0xA3, 0x2E, 0xF6, /* Random */
0x00, /* Session id len */
0x14, /* Cookie len */
0x01, 0x01, 0x02, 0x03, 0x04, 005, 0x06, 007, 0x08, 0x09, 0x0A, 0x0B, 0x0C,
0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, /* Cookie */
0x00, 0x04, /* Ciphersuites len */
0x00, 0x2f, /* AES128-SHA */
0x00, 0xff, /* Empty reneg info SCSV */
0x01, /* Compression methods len */
0x00, /* Null compression */
0x00, 0x00 /* Extensions len */
};
/* A fragmented ClientHello with the fragment boundary mid cookie */
static const unsigned char clienthello_cookie_short[] = {
0x16, /* Handshake */
0xFE, 0xFF, /* DTLSv1.0 */
0x00, 0x00, /* Epoch */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Record sequence number */
0x00, 0x43, /* Record Length */
0x01, /* ClientHello */
0x00, 0x00, 0x42, /* Message length */
0x00, 0x00, /* Message sequence */
0x00, 0x00, 0x00, /* Fragment offset */
0x00, 0x00, 0x37, /* Fragment length */
0xFE, 0xFD, /* DTLSv1.2 */
0xCA, 0x18, 0x9F, 0x76, 0xEC, 0x57, 0xCE, 0xE5, 0xB3, 0xAB, 0x79, 0x90,
0xAD, 0xAC, 0x6E, 0xD1, 0x58, 0x35, 0x03, 0x97, 0x16, 0x10, 0x82, 0x56,
0xD8, 0x55, 0xFF, 0xE1, 0x8A, 0xA3, 0x2E, 0xF6, /* Random */
0x00, /* Session id len */
0x14, /* Cookie len */
0x00, 0x01, 0x02, 0x03, 0x04, 005, 0x06, 007, 0x08, 0x09, 0x0A, 0x0B, 0x0C,
0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12 /* Cookie */
};
/* Bad record - too short */
static const unsigned char record_short[] = {
0x16, /* Handshake */
0xFE, 0xFF, /* DTLSv1.0 */
0x00, 0x00, /* Epoch */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00 /* Record sequence number */
};
static const unsigned char verify[] = {
0x16, /* Handshake */
0xFE, 0xFF, /* DTLSv1.0 */
0x00, 0x00, /* Epoch */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Record sequence number */
0x00, 0x23, /* Record Length */
0x03, /* HelloVerifyRequest */
0x00, 0x00, 0x17, /* Message length */
0x00, 0x00, /* Message sequence */
0x00, 0x00, 0x00, /* Fragment offset */
0x00, 0x00, 0x17, /* Fragment length */
0xFE, 0xFF, /* DTLSv1.0 */
0x14, /* Cookie len */
0x00, 0x01, 0x02, 0x03, 0x04, 005, 0x06, 007, 0x08, 0x09, 0x0A, 0x0B, 0x0C,
0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13 /* Cookie */
};
static struct {
const unsigned char *in;
unsigned int inlen;
/*
* GOOD == positive return value from DTLSv1_listen, no output yet
* VERIFY == 0 return value, HelloVerifyRequest sent
* DROP == 0 return value, no output
*/
enum {GOOD, VERIFY, DROP} outtype;
} testpackets[9] = {
{
clienthello_nocookie,
sizeof(clienthello_nocookie),
VERIFY
},
{
clienthello_nocookie_frag,
sizeof(clienthello_nocookie_frag),
VERIFY
},
{
clienthello_nocookie_short,
sizeof(clienthello_nocookie_short),
DROP
},
{
clienthello_2ndfrag,
sizeof(clienthello_2ndfrag),
DROP
},
{
clienthello_cookie,
sizeof(clienthello_cookie),
GOOD
},
{
clienthello_cookie_frag,
sizeof(clienthello_cookie_frag),
GOOD
},
{
clienthello_badcookie,
sizeof(clienthello_badcookie),
VERIFY
},
{
clienthello_cookie_short,
sizeof(clienthello_cookie_short),
DROP
},
{
record_short,
sizeof(record_short),
DROP
}
};
# define COOKIE_LEN 20
static int cookie_gen(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
{
unsigned int i;
for (i = 0; i < COOKIE_LEN; i++, cookie++) {
*cookie = i;
}
*cookie_len = COOKIE_LEN;
return 1;
}
static int cookie_verify(SSL *ssl, const unsigned char *cookie,
unsigned int cookie_len)
{
unsigned int i;
if (cookie_len != COOKIE_LEN)
return 0;
for (i = 0; i < COOKIE_LEN; i++, cookie++) {
if (*cookie != i)
return 0;
}
return 1;
}
#endif
int main(void)
{
#ifndef OPENSSL_NO_SOCK
SSL_CTX *ctx = NULL;
SSL *ssl = NULL;
BIO *outbio = NULL;
BIO *inbio = NULL;
BIO_ADDR *peer = BIO_ADDR_new();
char *data;
long datalen;
int ret, success = 0;
long i;
ctx = SSL_CTX_new(DTLS_server_method());
if (ctx == NULL || peer == NULL)
goto err;
SSL_CTX_set_cookie_generate_cb(ctx, cookie_gen);
SSL_CTX_set_cookie_verify_cb(ctx, cookie_verify);
/* Create an SSL object for the connection */
ssl = SSL_new(ctx);
if (ssl == NULL)
goto err;
outbio = BIO_new(BIO_s_mem());
if (outbio == NULL)
goto err;
SSL_set0_wbio(ssl, outbio);
success = 1;
for (i = 0; i < (long)OSSL_NELEM(testpackets) && success; i++) {
inbio = BIO_new_mem_buf((char *)testpackets[i].in,
testpackets[i].inlen);
if (inbio == NULL) {
success = 0;
goto err;
}
/* Set Non-blocking IO behaviour */
BIO_set_mem_eof_return(inbio, -1);
SSL_set0_rbio(ssl, inbio);
/* Process the incoming packet */
ret = DTLSv1_listen(ssl, peer);
if (ret < 0) {
success = 0;
goto err;
}
datalen = BIO_get_mem_data(outbio, &data);
if (testpackets[i].outtype == VERIFY) {
if (ret == 0) {
if (datalen != sizeof(verify)
|| (memcmp(data, verify, sizeof(verify)) != 0)) {
printf("Test %ld failure: incorrect HelloVerifyRequest\n", i);
success = 0;
} else {
printf("Test %ld success\n", i);
}
} else {
printf ("Test %ld failure: should not have succeeded\n", i);
success = 0;
}
} else if (datalen == 0) {
if ((ret == 0 && testpackets[i].outtype == DROP)
|| (ret == 1 && testpackets[i].outtype == GOOD)) {
printf("Test %ld success\n", i);
} else {
printf("Test %ld failure: wrong return value\n", i);
success = 0;
}
} else {
printf("Test %ld failure: Unexpected data output\n", i);
success = 0;
}
(void)BIO_reset(outbio);
inbio = NULL;
/* Frees up inbio */
SSL_set0_rbio(ssl, NULL);
}
err:
if (!success)
ERR_print_errors_fp(stderr);
/* Also frees up outbio */
SSL_free(ssl);
SSL_CTX_free(ctx);
BIO_free(inbio);
OPENSSL_free(peer);
# ifndef OPENSSL_NO_CRYPTO_MDEBUG
CRYPTO_mem_leaks_fp(stderr);
# endif
return success ? 0 : 1;
#else
printf("DTLSv1_listen() is not supported by this build - skipping\n");
return 0;
#endif
}
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