55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
// Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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#include <openssl/bn.h>
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#include <openssl/dh.h>
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struct wrapped_callback {
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void (*callback)(int, int, void *);
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void *arg;
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};
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// callback_wrapper converts an “old” style generation callback to the newer
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// |BN_GENCB| form.
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static int callback_wrapper(int event, int n, BN_GENCB *gencb) {
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struct wrapped_callback *wrapped = (struct wrapped_callback *) gencb->arg;
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wrapped->callback(event, n, wrapped->arg);
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return 1;
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}
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DH *DH_generate_parameters(int prime_len, int generator,
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void (*callback)(int, int, void *), void *cb_arg) {
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if (prime_len < 0 || generator < 0) {
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return NULL;
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}
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DH *ret = DH_new();
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if (ret == NULL) {
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return NULL;
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}
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BN_GENCB gencb_storage;
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BN_GENCB *cb = NULL;
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struct wrapped_callback wrapped;
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if (callback != NULL) {
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wrapped.callback = callback;
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wrapped.arg = cb_arg;
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cb = &gencb_storage;
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BN_GENCB_set(cb, callback_wrapper, &wrapped);
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}
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if (!DH_generate_parameters_ex(ret, prime_len, generator, cb)) {
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goto err;
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}
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return ret;
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err:
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DH_free(ret);
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return NULL;
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}
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