-/* 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 "internal/cryptlib.h"
#include <openssl/bn.h>
-#include <openssl/dh.h>
-
-const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT;
+#include "dh_locl.h"
+#include <openssl/engine.h>
-static DH_METHOD *default_DH_method;
-static int dh_meth_num = 0;
-static STACK_OF(CRYPTO_EX_DATA_FUNCS) *dh_meth = NULL;
+static const DH_METHOD *default_DH_method = NULL;
-void DH_set_default_method(DH_METHOD *meth)
+void DH_set_default_method(const DH_METHOD *meth)
{
- default_DH_method = meth;
+ default_DH_method = meth;
}
-DH_METHOD *DH_get_default_method(void)
+const DH_METHOD *DH_get_default_method(void)
{
- if(!default_DH_method) default_DH_method = DH_OpenSSL();
- return default_DH_method;
+ if (!default_DH_method)
+ default_DH_method = DH_OpenSSL();
+ return default_DH_method;
}
-DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth)
+int DH_set_method(DH *dh, const DH_METHOD *meth)
{
- DH_METHOD *mtmp;
- mtmp = dh->meth;
- if (mtmp->finish) mtmp->finish(dh);
- dh->meth = meth;
- if (meth->init) meth->init(dh);
- return mtmp;
+ /*
+ * 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(DH_METHOD *meth)
- {
- DH *ret;
- ret=(DH *)Malloc(sizeof(DH));
-
- if (ret == NULL)
- {
- DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
- if(meth) ret->meth = meth;
- else ret->meth = DH_get_default_method();
- 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;
- if ((ret->meth->init != NULL) && !ret->meth->init(ret))
- {
- Free(ret);
- ret=NULL;
- }
- else
- CRYPTO_new_ex_data(dh_meth,ret,&ret->ex_data);
- return(ret);
- }
+ return DH_new_method(NULL);
+}
-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);
+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->references = 1;
+ ret->lock = CRYPTO_THREAD_lock_new();
+ if (ret->lock == NULL) {
+ OPENSSL_free(ret);
+ return NULL;
+ }
+
+ ret->meth = DH_get_default_method();
+#ifndef OPENSSL_NO_ENGINE
+ ret->flags = ret->meth->flags; /* early default init */
+ if (engine) {
+ if (!ENGINE_init(engine)) {
+ DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
+ goto err;
+ }
+ 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);
+ goto err;
+ }
+ }
#endif
- if (i > 0) return;
-#ifdef REF_CHECK
- if (i < 0)
- {
- fprintf(stderr,"DH_free, bad reference count\n");
- abort();
- }
+
+ ret->flags = ret->meth->flags;
+
+ if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data))
+ goto err;
+
+ if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
+ DHerr(DH_F_DH_NEW_METHOD, ERR_R_INIT_FAIL);
+err:
+ 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(dh_meth, r, &r->ex_data);
-
- if(r->meth->finish) r->meth->finish(r);
-
- 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) 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);
- Free(r);
- }
-
-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)
- {
- dh_meth_num++;
- return(CRYPTO_get_ex_new_index(dh_meth_num-1,
- &dh_meth,argl,argp,new_func,dup_func,free_func));
- }
+ 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));
- }
+{
+ 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(DH *dh)
- {
- return(BN_num_bytes(dh->p));
- }
+{
+ 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);
+}
+
+
+void DH_get0_pqg(const DH *dh, BIGNUM **p, BIGNUM **q, BIGNUM **g)
+{
+ if (p != NULL)
+ *p = dh->p;
+ if (q != NULL)
+ *q = dh->q;
+ if (g != NULL)
+ *g = dh->g;
+}
+
+int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
+{
+ /* If the fields p and g in d are NULL, the corresponding input
+ * parameters MUST be non-NULL. q may remain NULL.
+ *
+ * It is an error to give the results from get0 on d
+ * as input parameters.
+ */
+ if (p == dh->p || (dh->q != NULL && q == dh->q) || g == dh->g)
+ return 0;
+
+ if (p != NULL) {
+ BN_free(dh->p);
+ dh->p = p;
+ }
+ if (q != NULL) {
+ BN_free(dh->q);
+ dh->q = q;
+ }
+ if (g != NULL) {
+ BN_free(dh->g);
+ dh->g = g;
+ }
+
+ if (q != NULL) {
+ dh->length = BN_num_bits(q);
+ }
+
+ return 1;
+}
+
+long DH_get_length(const DH *dh)
+{
+ return dh->length;
+}
+
+int DH_set_length(DH *dh, long length)
+{
+ dh->length = length;
+ return 1;
+}
+
+void DH_get0_key(const DH *dh, BIGNUM **pub_key, BIGNUM **priv_key)
+{
+ if (pub_key != NULL)
+ *pub_key = dh->pub_key;
+ if (priv_key != NULL)
+ *priv_key = dh->priv_key;
+}
+
+int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key)
+{
+ /* If the pub_key in dh is NULL, the corresponding input
+ * parameters MUST be non-NULL. The priv_key field may
+ * be left NULL.
+ *
+ * It is an error to give the results from get0 on dh
+ * as input parameters.
+ */
+ if (dh->pub_key == pub_key
+ || (dh->priv_key != NULL && priv_key == dh->priv_key))
+ return 0;
+
+ if (pub_key != NULL) {
+ BN_free(dh->pub_key);
+ dh->pub_key = pub_key;
+ }
+ if (priv_key != NULL) {
+ BN_free(dh->priv_key);
+ dh->priv_key = priv_key;
+ }
+
+ return 1;
+}
+
+void DH_clear_flags(DH *dh, int flags)
+{
+ dh->flags &= ~flags;
+}
+
+int DH_test_flags(const DH *dh, int flags)
+{
+ return dh->flags & flags;
+}
+
+void DH_set_flags(DH *dh, int flags)
+{
+ dh->flags |= flags;
+}
+
+ENGINE *DH_get0_engine(DH *dh)
+{
+ return dh->engine;
+}
projects / openssl.git / blobdiff