--- /dev/null
+/* crypto/dh/dh_lib.c */
+/* 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 <stdio.h>
+#include "cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/dh.h>
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
+
+#ifdef OPENSSL_FIPS
+#include <openssl/fips.h>
+#endif
+
+const char DH_version[]="Diffie-Hellman" OPENSSL_VERSION_PTEXT;
+
+static const DH_METHOD *default_DH_method = NULL;
+
+void DH_set_default_method(const DH_METHOD *meth)
+ {
+ default_DH_method = meth;
+ }
+
+const DH_METHOD *DH_get_default_method(void)
+ {
+ if(!default_DH_method)
+ {
+#ifdef OPENSSL_FIPS
+ if (FIPS_mode())
+ return FIPS_dh_openssl();
+ else
+ return DH_OpenSSL();
+#else
+ default_DH_method = DH_OpenSSL();
+#endif
+ }
+ return default_DH_method;
+ }
+
+int DH_set_method(DH *dh, const DH_METHOD *meth)
+ {
+ /* NB: The caller is specifically setting a method, so it's not up to us
+ * to deal with which ENGINE it comes from. */
+ const DH_METHOD *mtmp;
+ mtmp = dh->meth;
+ if (mtmp->finish) mtmp->finish(dh);
+#ifndef OPENSSL_NO_ENGINE
+ if (dh->engine)
+ {
+ ENGINE_finish(dh->engine);
+ dh->engine = NULL;
+ }
+#endif
+ dh->meth = meth;
+ if (meth->init) meth->init(dh);
+ return 1;
+ }
+
+DH *DH_new(void)
+ {
+ return DH_new_method(NULL);
+ }
+
+DH *DH_new_method(ENGINE *engine)
+ {
+ DH *ret;
+
+ ret=(DH *)OPENSSL_malloc(sizeof(DH));
+ if (ret == NULL)
+ {
+ DHerr(DH_F_DH_NEW_METHOD,ERR_R_MALLOC_FAILURE);
+ return(NULL);
+ }
+
+ ret->meth = DH_get_default_method();
+#ifndef OPENSSL_NO_ENGINE
+ if (engine)
+ {
+ if (!ENGINE_init(engine))
+ {
+ DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+ ret->engine = engine;
+ }
+ else
+ ret->engine = ENGINE_get_default_DH();
+ if(ret->engine)
+ {
+ ret->meth = ENGINE_get_DH(ret->engine);
+ if(!ret->meth)
+ {
+ DHerr(DH_F_DH_NEW_METHOD,ERR_R_ENGINE_LIB);
+ ENGINE_finish(ret->engine);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+ }
+#endif
+
+ ret->pad=0;
+ ret->version=0;
+ ret->p=NULL;
+ ret->g=NULL;
+ ret->length=0;
+ ret->pub_key=NULL;
+ ret->priv_key=NULL;
+ ret->q=NULL;
+ ret->j=NULL;
+ ret->seed = NULL;
+ ret->seedlen = 0;
+ ret->counter = NULL;
+ ret->method_mont_p=NULL;
+ ret->references = 1;
+ ret->flags=ret->meth->flags & ~DH_FLAG_NON_FIPS_ALLOW;
+ CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
+ if ((ret->meth->init != NULL) && !ret->meth->init(ret))
+ {
+#ifndef OPENSSL_NO_ENGINE
+ if (ret->engine)
+ ENGINE_finish(ret->engine);
+#endif
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
+ OPENSSL_free(ret);
+ ret=NULL;
+ }
+ return(ret);
+ }
+
+void DH_free(DH *r)
+ {
+ int i;
+ if(r == NULL) return;
+ i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH);
+#ifdef REF_PRINT
+ REF_PRINT("DH",r);
+#endif
+ if (i > 0) return;
+#ifdef REF_CHECK
+ if (i < 0)
+ {
+ fprintf(stderr,"DH_free, bad reference count\n");
+ abort();
+ }
+#endif
+
+ if (r->meth->finish)
+ r->meth->finish(r);
+#ifndef OPENSSL_NO_ENGINE
+ if (r->engine)
+ ENGINE_finish(r->engine);
+#endif
+
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);
+
+ if (r->p != NULL) BN_clear_free(r->p);
+ if (r->g != NULL) BN_clear_free(r->g);
+ if (r->q != NULL) BN_clear_free(r->q);
+ if (r->j != NULL) BN_clear_free(r->j);
+ if (r->seed) OPENSSL_free(r->seed);
+ if (r->counter != NULL) BN_clear_free(r->counter);
+ if (r->pub_key != NULL) BN_clear_free(r->pub_key);
+ if (r->priv_key != NULL) BN_clear_free(r->priv_key);
+ OPENSSL_free(r);
+ }
+
+int DH_up_ref(DH *r)
+ {
+ int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH);
+#ifdef REF_PRINT
+ REF_PRINT("DH",r);
+#endif
+#ifdef REF_CHECK
+ if (i < 2)
+ {
+ fprintf(stderr, "DH_up, bad reference count\n");
+ abort();
+ }
+#endif
+ return ((i > 1) ? 1 : 0);
+ }
+
+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));
+ }
+
+int DH_size(const DH *dh)
+ {
+ return(BN_num_bytes(dh->p));
+ }
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