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- /* ====================================================================
- * Copyright (c) 1998-2002 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 <openssl/bn.h>
- #include <openssl/dh.h>
-
-
- struct wrapped_callback {
- void (*callback)(int, int, void *);
- void *arg;
- };
-
- /* callback_wrapper converts an “old” style generation callback to the newer
- * |BN_GENCB| form. */
- static int callback_wrapper(int event, int n, BN_GENCB *gencb) {
- struct wrapped_callback *wrapped = (struct wrapped_callback *) gencb->arg;
- wrapped->callback(event, n, wrapped->arg);
- return 1;
- }
-
- DH *DH_generate_parameters(int prime_len, int generator,
- void (*callback)(int, int, void *), void *cb_arg) {
- if (prime_len < 0 || generator < 0) {
- return NULL;
- }
-
- DH *ret = DH_new();
- if (ret == NULL) {
- return NULL;
- }
-
- BN_GENCB gencb_storage;
- BN_GENCB *cb = NULL;
-
- struct wrapped_callback wrapped;
-
- if (callback != NULL) {
- wrapped.callback = callback;
- wrapped.arg = cb_arg;
-
- cb = &gencb_storage;
- BN_GENCB_set(cb, callback_wrapper, &wrapped);
- }
-
- if (!DH_generate_parameters_ex(ret, prime_len, generator, cb)) {
- goto err;
- }
-
- return ret;
-
- err:
- DH_free(ret);
- return NULL;
- }
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