-/* crypto/dsa/dsa_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
/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
#include <stdio.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/bn.h>
#include <openssl/dsa.h>
#include <openssl/asn1.h>
+#ifndef OPENSSL_NO_ENGINE
+# include <openssl/engine.h>
+#endif
+#ifndef OPENSSL_NO_DH
+# include <openssl/dh.h>
+#endif
-const char *DSA_version="DSA" OPENSSL_VERSION_PTEXT;
-
-static DSA_METHOD *default_DSA_method;
-static int dsa_meth_num = 0;
-static STACK *dsa_meth = NULL;
+static const DSA_METHOD *default_DSA_method = NULL;
-void DSA_set_default_method(DSA_METHOD *meth)
+void DSA_set_default_method(const DSA_METHOD *meth)
{
- default_DSA_method = meth;
+ default_DSA_method = meth;
}
-DSA_METHOD *DSA_get_default_method(void)
+const DSA_METHOD *DSA_get_default_method(void)
{
- if(!default_DSA_method) default_DSA_method = DSA_OpenSSL();
- return default_DSA_method;
+ if (!default_DSA_method)
+ default_DSA_method = DSA_OpenSSL();
+ return default_DSA_method;
}
DSA *DSA_new(void)
{
- return DSA_new_method(NULL);
+ return DSA_new_method(NULL);
}
-DSA_METHOD *DSA_set_method(DSA *dsa, DSA_METHOD *meth)
+int DSA_set_method(DSA *dsa, const DSA_METHOD *meth)
{
- DSA_METHOD *mtmp;
- mtmp = dsa->meth;
- if (mtmp->finish) mtmp->finish(dsa);
- dsa->meth = meth;
- if (meth->init) meth->init(dsa);
- 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 DSA_METHOD *mtmp;
+ mtmp = dsa->meth;
+ if (mtmp->finish)
+ mtmp->finish(dsa);
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE_finish(dsa->engine);
+ dsa->engine = NULL;
+#endif
+ dsa->meth = meth;
+ if (meth->init)
+ meth->init(dsa);
+ return 1;
}
+DSA *DSA_new_method(ENGINE *engine)
+{
+ DSA *ret;
+
+ ret = OPENSSL_zalloc(sizeof(*ret));
+ if (ret == NULL) {
+ DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+ ret->meth = DSA_get_default_method();
+#ifndef OPENSSL_NO_ENGINE
+ if (engine) {
+ if (!ENGINE_init(engine)) {
+ DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+ ret->engine = engine;
+ } else
+ ret->engine = ENGINE_get_default_DSA();
+ if (ret->engine) {
+ ret->meth = ENGINE_get_DSA(ret->engine);
+ if (ret->meth == NULL) {
+ DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
+ ENGINE_finish(ret->engine);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+ }
+#endif
+
+ ret->references = 1;
+ ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW;
-DSA *DSA_new_method(DSA_METHOD *meth)
- {
- DSA *ret;
-
- ret=(DSA *)Malloc(sizeof(DSA));
- if (ret == NULL)
- {
- DSAerr(DSA_F_DSA_NEW,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
- if(!default_DSA_method) default_DSA_method = DSA_OpenSSL();
- if(meth) ret->meth = meth;
- else ret->meth = default_DSA_method;
- ret->pad=0;
- ret->version=0;
- ret->write_params=1;
- ret->p=NULL;
- ret->q=NULL;
- ret->g=NULL;
-
- ret->pub_key=NULL;
- ret->priv_key=NULL;
-
- ret->kinv=NULL;
- ret->r=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(dsa_meth,(char *)ret,&ret->ex_data);
-
- return(ret);
- }
+ CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, 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_DSA, ret, &ret->ex_data);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+
+ if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
+ DSA_free(ret);
+ ret = NULL;
+ }
+
+ return ret;
+}
void DSA_free(DSA *r)
- {
- int i;
+{
+ int i;
- if (r == NULL) return;
+ if (r == NULL)
+ return;
- i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA);
-#ifdef REF_PRINT
- REF_PRINT("DSA",r);
-#endif
- if (i > 0) return;
-#ifdef REF_CHECK
- if (i < 0)
- {
- fprintf(stderr,"DSA_free, bad reference count\n");
- abort();
- }
+ CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
+ REF_PRINT_COUNT("DSA", 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(dsa_meth, (char *)r, &r->ex_data);
-
- if(r->meth->finish) r->meth->finish(r);
-
- if (r->p != NULL) BN_clear_free(r->p);
- if (r->q != NULL) BN_clear_free(r->q);
- 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->kinv != NULL) BN_clear_free(r->kinv);
- if (r->r != NULL) BN_clear_free(r->r);
- Free(r);
- }
-
-int DSA_size(DSA *r)
- {
- int ret,i;
- ASN1_INTEGER bs;
- unsigned char buf[4];
-
- i=BN_num_bits(r->q);
- bs.length=(i+7)/8;
- bs.data=buf;
- bs.type=V_ASN1_INTEGER;
- /* If the top bit is set the asn1 encoding is 1 larger. */
- buf[0]=0xff;
-
- i=i2d_ASN1_INTEGER(&bs,NULL);
- i+=i; /* r and s */
- ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
- return(ret);
- }
-
-int DSA_get_ex_new_index(long argl, char *argp, int (*new_func)(),
- int (*dup_func)(), void (*free_func)())
- {
- dsa_meth_num++;
- return(CRYPTO_get_ex_new_index(dsa_meth_num-1,
- &dsa_meth,argl,argp,new_func,dup_func,free_func));
- }
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
+
+ CRYPTO_THREAD_lock_free(r->lock);
-int DSA_set_ex_data(DSA *d, int idx, char *arg)
- {
- return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
- }
-
-char *DSA_get_ex_data(DSA *d, int idx)
- {
- return(CRYPTO_get_ex_data(&d->ex_data,idx));
- }
-
-#ifndef NO_DH
-DH *DSA_dup_DH(DSA *r)
- {
- /* DSA has p, q, g, optional pub_key, optional priv_key.
- * DH has p, optional length, g, optional pub_key, optional priv_key.
- */
-
- DH *ret = NULL;
-
- if (r == NULL)
- goto err;
- ret = DH_new();
- if (ret == NULL)
- goto err;
- if (r->p != NULL)
- if ((ret->p = BN_dup(r->p)) == NULL)
- goto err;
- if (r->q != NULL)
- ret->length = BN_num_bits(r->q);
- if (r->g != NULL)
- if ((ret->g = BN_dup(r->g)) == NULL)
- goto err;
- if (r->pub_key != NULL)
- if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
- goto err;
- if (r->priv_key != NULL)
- if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
- goto err;
-
- return ret;
+ BN_clear_free(r->p);
+ BN_clear_free(r->q);
+ BN_clear_free(r->g);
+ BN_clear_free(r->pub_key);
+ BN_clear_free(r->priv_key);
+ OPENSSL_free(r);
+}
+
+int DSA_up_ref(DSA *r)
+{
+ int i;
+
+ if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
+ return 0;
+
+ REF_PRINT_COUNT("DSA", r);
+ REF_ASSERT_ISNT(i < 2);
+ return ((i > 1) ? 1 : 0);
+}
+
+int DSA_size(const DSA *r)
+{
+ int ret, i;
+ ASN1_INTEGER bs;
+ unsigned char buf[4]; /* 4 bytes looks really small. However,
+ * i2d_ASN1_INTEGER() will not look beyond
+ * the first byte, as long as the second
+ * parameter is NULL. */
+
+ i = BN_num_bits(r->q);
+ bs.length = (i + 7) / 8;
+ bs.data = buf;
+ bs.type = V_ASN1_INTEGER;
+ /* If the top bit is set the asn1 encoding is 1 larger. */
+ buf[0] = 0xff;
+
+ i = i2d_ASN1_INTEGER(&bs, NULL);
+ i += i; /* r and s */
+ ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
+ return (ret);
+}
+
+int DSA_set_ex_data(DSA *d, int idx, void *arg)
+{
+ return (CRYPTO_set_ex_data(&d->ex_data, idx, arg));
+}
+
+void *DSA_get_ex_data(DSA *d, int idx)
+{
+ return (CRYPTO_get_ex_data(&d->ex_data, idx));
+}
+
+int DSA_security_bits(const DSA *d)
+{
+ if (d->p && d->q)
+ return BN_security_bits(BN_num_bits(d->p), BN_num_bits(d->q));
+ return -1;
+}
+
+#ifndef OPENSSL_NO_DH
+DH *DSA_dup_DH(const DSA *r)
+{
+ /*
+ * DSA has p, q, g, optional pub_key, optional priv_key. DH has p,
+ * optional length, g, optional pub_key, optional priv_key, optional q.
+ */
+
+ DH *ret = NULL;
+
+ if (r == NULL)
+ goto err;
+ ret = DH_new();
+ if (ret == NULL)
+ goto err;
+ if (r->p != NULL)
+ if ((ret->p = BN_dup(r->p)) == NULL)
+ goto err;
+ if (r->q != NULL) {
+ ret->length = BN_num_bits(r->q);
+ if ((ret->q = BN_dup(r->q)) == NULL)
+ goto err;
+ }
+ if (r->g != NULL)
+ if ((ret->g = BN_dup(r->g)) == NULL)
+ goto err;
+ if (r->pub_key != NULL)
+ if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
+ goto err;
+ if (r->priv_key != NULL)
+ if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
+ goto err;
+
+ return ret;
err:
- if (ret != NULL)
- DH_free(ret);
- return NULL;
- }
+ DH_free(ret);
+ return NULL;
+}
#endif
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