#include "cryptlib.h"
#include <openssl/bn.h>
#include <openssl/dh.h>
+#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
+#endif
-const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT;
+const char DH_version[]="Diffie-Hellman" OPENSSL_VERSION_PTEXT;
-static const 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_openssl_method(const DH_METHOD *meth)
-{
- ENGINE *e;
- /* We'll need to notify the "openssl" ENGINE of this
- * change too. We won't bother locking things down at
- * our end as there was never any locking in these
- * functions! */
- if(default_DH_method != meth)
- {
- default_DH_method = meth;
- e = ENGINE_by_id("openssl");
- if(e)
- {
- ENGINE_set_DH(e, meth);
- ENGINE_free(e);
- }
- }
-}
+void DH_set_default_method(const DH_METHOD *meth)
+ {
+ default_DH_method = meth;
+ }
-const DH_METHOD *DH_get_default_openssl_method(void)
-{
- if(!default_DH_method) default_DH_method = DH_OpenSSL();
+const DH_METHOD *DH_get_default_method(void)
+ {
+ if(!default_DH_method)
+ default_DH_method = DH_OpenSSL();
return default_DH_method;
-}
+ }
-#if 0
-DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth)
-{
- DH_METHOD *mtmp;
+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 mtmp;
-}
-#else
-int DH_set_method(DH *dh, ENGINE *engine)
-{
- ENGINE *mtmp;
- const DH_METHOD *meth;
- mtmp = dh->engine;
- meth = ENGINE_get_DH(mtmp);
- if (!ENGINE_init(engine))
- return 0;
- if (meth->finish) meth->finish(dh);
- dh->engine= engine;
- meth = ENGINE_get_DH(engine);
- if (meth->init) meth->init(dh);
- /* SHOULD ERROR CHECK THIS!!! */
- ENGINE_finish(mtmp);
- return 1;
-}
-#endif
+ return 1;
+ }
DH *DH_new(void)
-{
+ {
return DH_new_method(NULL);
-}
+ }
-#if 0
-DH *DH_new_method(DH_METHOD *meth)
-#else
DH *DH_new_method(ENGINE *engine)
-#endif
{
- const DH_METHOD *meth;
DH *ret;
- ret=(DH *)OPENSSL_malloc(sizeof(DH));
+ ret=(DH *)OPENSSL_malloc(sizeof(DH));
if (ret == NULL)
{
- DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE);
+ DHerr(DH_F_DH_NEW_METHOD,ERR_R_MALLOC_FAILURE);
return(NULL);
}
- if(engine)
+
+ 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)
{
- if((ret->engine=ENGINE_get_default_DH()) == NULL)
+ ret->meth = ENGINE_get_DH(ret->engine);
+ if(!ret->meth)
{
- DHerr(DH_F_DH_NEW,ERR_LIB_ENGINE);
+ DHerr(DH_F_DH_NEW_METHOD,ERR_R_ENGINE_LIB);
+ ENGINE_finish(ret->engine);
OPENSSL_free(ret);
return NULL;
}
}
- meth = ENGINE_get_DH(ret->engine);
+#endif
+
ret->pad=0;
ret->version=0;
ret->p=NULL;
ret->counter = NULL;
ret->method_mont_p=NULL;
ret->references = 1;
- ret->flags=meth->flags;
- CRYPTO_new_ex_data(dh_meth,ret,&ret->ex_data);
- if ((meth->init != NULL) && !meth->init(ret))
+ ret->flags=ret->meth->flags;
+ CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
+ if ((ret->meth->init != NULL) && !ret->meth->init(ret))
{
- CRYPTO_free_ex_data(dh_meth,ret,&ret->ex_data);
+#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;
}
void DH_free(DH *r)
{
- const DH_METHOD *meth;
int i;
if(r == NULL) return;
i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH);
}
#endif
- meth = ENGINE_get_DH(r->engine);
- if(meth->finish) meth->finish(r);
- ENGINE_finish(r->engine);
+ if (r->meth->finish)
+ r->meth->finish(r);
+#ifndef OPENSSL_NO_ENGINE
+ if (r->engine)
+ ENGINE_finish(r->engine);
+#endif
- CRYPTO_free_ex_data(dh_meth, r, &r->ex_data);
+ 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);
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)
{
- dh_meth_num++;
- return(CRYPTO_get_ex_new_index(dh_meth_num-1,
- &dh_meth,argl,argp,new_func,dup_func,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(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);
+ }
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