-/* 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:
* 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
+ * 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
* 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
*/
#include <stdio.h>
-#include "cryptlib.h"
-#include "bn.h"
-#include "dh.h"
-
-char *DH_version="Diffie-Hellman part of SSLeay 0.9.1c 22-Dec-1998";
-
-DH *DH_new()
- {
- DH *ret;
-
- ret=(DH *)Malloc(sizeof(DH));
- if (ret == NULL)
- {
- DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
- ret->pad=0;
- ret->version=0;
- ret->p=NULL;
- ret->g=NULL;
- ret->length=0;
- ret->pub_key=NULL;
- ret->priv_key=NULL;
- ret->flags=DH_FLAG_CACHE_MONT_P;
- ret->method_mont_p=NULL;
- return(ret);
- }
-
-void DH_free(r)
-DH *r;
- {
- if (r->p != NULL) BN_clear_free(r->p);
- if (r->g != NULL) BN_clear_free(r->g);
- if (r->pub_key != NULL) BN_clear_free(r->pub_key);
- if (r->priv_key != NULL) BN_clear_free(r->priv_key);
- if (r->method_mont_p != NULL)
- BN_MONT_CTX_free((BN_MONT_CTX *)r->method_mont_p);
- Free(r);
- }
-
-int DH_size(dh)
-DH *dh;
- {
- return(BN_num_bytes(dh->p));
- }
+#include "internal/cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/dh.h>
+#ifndef OPENSSL_NO_ENGINE
+# include <openssl/engine.h>
+#endif
+
+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)
+ default_DH_method = DH_OpenSSL();
+ 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
+ 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 = OPENSSL_zalloc(sizeof(*ret));
+
+ 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 == NULL) {
+ DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
+ ENGINE_finish(ret->engine);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+ }
+#endif
+
+ ret->references = 1;
+ ret->flags = ret->meth->flags;
+
+ CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
+
+ ret->lock = CRYPTO_THREAD_lock_new();
+ if (ret->lock == NULL) {
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE_finish(ret->engine);
+#endif
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+
+ if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
+ DH_free(ret);
+ ret = NULL;
+ }
+
+ return ret;
+}
+
+void DH_free(DH *r)
+{
+ int i;
+
+ if (r == NULL)
+ return;
+
+ CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
+ REF_PRINT_COUNT("DH", r);
+ if (i > 0)
+ return;
+ REF_ASSERT_ISNT(i < 0);
+
+ if (r->meth->finish)
+ r->meth->finish(r);
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE_finish(r->engine);
+#endif
+
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);
+
+ CRYPTO_THREAD_lock_free(r->lock);
+
+ BN_clear_free(r->p);
+ BN_clear_free(r->g);
+ BN_clear_free(r->q);
+ BN_clear_free(r->j);
+ OPENSSL_free(r->seed);
+ BN_clear_free(r->counter);
+ BN_clear_free(r->pub_key);
+ BN_clear_free(r->priv_key);
+ OPENSSL_free(r);
+}
+
+int DH_up_ref(DH *r)
+{
+ int i;
+
+ if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
+ return 0;
+
+ REF_PRINT_COUNT("DH", r);
+ REF_ASSERT_ISNT(i < 2);
+ return ((i > 1) ? 1 : 0);
+}
+
+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_bits(const DH *dh)
+{
+ return BN_num_bits(dh->p);
+}
+
+int DH_size(const DH *dh)
+{
+ return (BN_num_bytes(dh->p));
+}
+
+int DH_security_bits(const DH *dh)
+{
+ int N;
+ if (dh->q)
+ N = BN_num_bits(dh->q);
+ else if (dh->length)
+ N = dh->length;
+ else
+ N = -1;
+ return BN_security_bits(BN_num_bits(dh->p), N);
+}
projects / openssl.git / blobdiff