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-rw-r--r--src/crypto/dh/dh.c243
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diff --git a/src/crypto/dh/dh.c b/src/crypto/dh/dh.c
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+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * 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 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 acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.] */
+
+#include <openssl/dh.h>
+
+#include <string.h>
+
+#include <openssl/bn.h>
+#include <openssl/buf.h>
+#include <openssl/err.h>
+#include <openssl/ex_data.h>
+#include <openssl/mem.h>
+#include <openssl/thread.h>
+
+#include "internal.h"
+
+
+extern const DH_METHOD DH_default_method;
+
+DH *DH_new(void) { return DH_new_method(NULL); }
+
+DH *DH_new_method(const ENGINE *engine) {
+ DH *dh = (DH *)OPENSSL_malloc(sizeof(DH));
+ if (dh == NULL) {
+ OPENSSL_PUT_ERROR(DH, DH_new_method, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ memset(dh, 0, sizeof(DH));
+
+ if (engine) {
+ dh->meth = ENGINE_get_DH_method(engine);
+ }
+
+ if (dh->meth == NULL) {
+ dh->meth = (DH_METHOD*) &DH_default_method;
+ }
+ METHOD_ref(dh->meth);
+
+ dh->references = 1;
+ if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, dh, &dh->ex_data)) {
+ OPENSSL_free(dh);
+ return NULL;
+ }
+
+ if (dh->meth->init && !dh->meth->init(dh)) {
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, dh, &dh->ex_data);
+ METHOD_unref(dh->meth);
+ OPENSSL_free(dh);
+ return NULL;
+ }
+
+ return dh;
+}
+
+void DH_free(DH *dh) {
+ if (dh == NULL) {
+ return;
+ }
+
+ if (CRYPTO_add(&dh->references, -1, CRYPTO_LOCK_DH) > 0) {
+ return;
+ }
+
+ if (dh->meth->finish) {
+ dh->meth->finish(dh);
+ }
+ METHOD_unref(dh->meth);
+
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, dh, &dh->ex_data);
+
+ if (dh->method_mont_p) BN_MONT_CTX_free(dh->method_mont_p);
+ if (dh->p != NULL) BN_clear_free(dh->p);
+ if (dh->g != NULL) BN_clear_free(dh->g);
+ if (dh->q != NULL) BN_clear_free(dh->q);
+ if (dh->j != NULL) BN_clear_free(dh->j);
+ if (dh->seed) OPENSSL_free(dh->seed);
+ if (dh->counter != NULL) BN_clear_free(dh->counter);
+ if (dh->pub_key != NULL) BN_clear_free(dh->pub_key);
+ if (dh->priv_key != NULL) BN_clear_free(dh->priv_key);
+
+ OPENSSL_free(dh);
+}
+
+int DH_generate_parameters_ex(DH *dh, int prime_bits, int generator, BN_GENCB *cb) {
+ if (dh->meth->generate_parameters) {
+ return dh->meth->generate_parameters(dh, prime_bits, generator, cb);
+ }
+ return DH_default_method.generate_parameters(dh, prime_bits, generator, cb);
+}
+
+int DH_generate_key(DH *dh) {
+ if (dh->meth->generate_key) {
+ return dh->meth->generate_key(dh);
+ }
+ return DH_default_method.generate_key(dh);
+}
+
+int DH_compute_key(unsigned char *out, const BIGNUM *peers_key, DH *dh) {
+ if (dh->meth->compute_key) {
+ return dh->meth->compute_key(dh, out, peers_key);
+ }
+ return DH_default_method.compute_key(dh, out, peers_key);
+}
+
+int DH_size(const DH *dh) { return BN_num_bytes(dh->p); }
+
+int DH_up_ref(DH *r) {
+ CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH);
+ return 1;
+}
+
+static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src) {
+ BIGNUM *a = NULL;
+
+ if (src) {
+ a = BN_dup(src);
+ if (!a) {
+ return 0;
+ }
+ }
+
+ if (*dst) {
+ BN_free(*dst);
+ }
+ *dst = a;
+ return 1;
+}
+
+static int int_dh_param_copy(DH *to, const DH *from, int is_x942) {
+ if (is_x942 == -1) {
+ is_x942 = !!from->q;
+ }
+ if (!int_dh_bn_cpy(&to->p, from->p) ||
+ !int_dh_bn_cpy(&to->g, from->g)) {
+ return 0;
+ }
+
+ if (!is_x942) {
+ return 1;
+ }
+
+ if (!int_dh_bn_cpy(&to->q, from->q) ||
+ !int_dh_bn_cpy(&to->j, from->j)) {
+ return 0;
+ }
+
+ if (to->seed) {
+ OPENSSL_free(to->seed);
+ to->seed = NULL;
+ to->seedlen = 0;
+ }
+ if (from->seed) {
+ to->seed = BUF_memdup(from->seed, from->seedlen);
+ if (!to->seed) {
+ return 0;
+ }
+ to->seedlen = from->seedlen;
+ }
+
+ return 1;
+}
+
+DH *DHparams_dup(const DH *dh) {
+ DH *ret = DH_new();
+ if (!ret) {
+ return NULL;
+ }
+
+ if (!int_dh_param_copy(ret, dh, -1)) {
+ DH_free(ret);
+ return NULL;
+ }
+
+ return ret;
+}
+
+int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
+ CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) {
+ return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, argl, argp, new_func,
+ dup_func, free_func);
+}
+
+int DH_set_ex_data(DH *d, int idx, void *arg) {
+ return (CRYPTO_set_ex_data(&d->ex_data, idx, arg));
+}
+
+void *DH_get_ex_data(DH *d, int idx) {
+ return (CRYPTO_get_ex_data(&d->ex_data, idx));
+}
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