--- /dev/null
+/*
+ * Written by Matt Caswell for the OpenSSL project.
+ */
+/* ====================================================================
+ * Copyright (c) 2016 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <string.h>
+#include <sys/socket.h>
+#include <openssl/ssl.h>
+#include <openssl/bio.h>
+#include <openssl/err.h>
+#include <openssl/conf.h>
+#include <openssl/engine.h>
+#include "e_os.h"
+
+/* Just a ClientHello without a cookie */
+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 */
+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 */
+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 */
+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 */
+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 */
+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 */
+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 */
+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 */
+const unsigned char record_short[] = {
+ 0x16, /* Handshake */
+ 0xFE, 0xFF, /* DTLSv1.0 */
+ 0x00, 0x00, /* Epoch */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 /* Record sequence number */
+};
+
+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 */
+};
+
+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;
+}
+
+int main(void)
+{
+ 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;
+ size_t i;
+
+ /* Initialise libssl */
+ SSL_load_error_strings();
+ SSL_library_init();
+
+ 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_set_wbio(ssl, outbio);
+
+ success = 1;
+ for (i = 0; i < 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_set_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_set_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);
+ /* Unitialise libssl */
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE_cleanup();
+#endif
+ CONF_modules_unload(1);
+ CRYPTO_cleanup_all_ex_data();
+ EVP_cleanup();
+ ERR_remove_thread_state(NULL);
+ ERR_free_strings();
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+ CRYPTO_mem_leaks_fp(stderr);
+#endif
+ return success ? 0 : 1;
+}
+
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