/* crypto/ecdsa/ecs_lib.c */
/* ====================================================================
- * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
+ * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
*
* 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 above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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
* Hudson (tjh@cryptsoft.com).
*
*/
-/* 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 "cryptlib.h"
-#include "ecdsa.h"
-#include <openssl/engine.h>
-const char *ECDSA_version="ECDSA" OPENSSL_VERSION_PTEXT;
+#include <string.h>
+#include "ecs_locl.h"
+#ifndef OPENSSL_NO_ENGINE
+# include <openssl/engine.h>
+#endif
+#include <openssl/err.h>
+#include <openssl/bn.h>
static const ECDSA_METHOD *default_ECDSA_method = NULL;
+static void *ecdsa_data_new(void);
+static void *ecdsa_data_dup(void *);
+static void ecdsa_data_free(void *);
+
void ECDSA_set_default_method(const ECDSA_METHOD *meth)
{
- default_ECDSA_method = meth;
+ default_ECDSA_method = meth;
}
const ECDSA_METHOD *ECDSA_get_default_method(void)
{
- if(!default_ECDSA_method)
- default_ECDSA_method = ECDSA_OpenSSL();
- return default_ECDSA_method;
+ return default_ECDSA_method;
}
-ECDSA *ECDSA_new(void)
+int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth)
{
- return ECDSA_new_method(NULL);
+ ECDSA_DATA *ecdsa;
+
+ ecdsa = ecdsa_check(eckey);
+
+ if (ecdsa == NULL)
+ return 0;
+
+#ifndef OPENSSL_NO_ENGINE
+ if (ecdsa->engine) {
+ ENGINE_finish(ecdsa->engine);
+ ecdsa->engine = NULL;
+ }
+#endif
+ ecdsa->meth = meth;
+
+ return 1;
}
-int ECDSA_set_method(ECDSA *ecdsa, const ECDSA_METHOD *meth)
+static ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *engine)
{
- const ECDSA_METHOD *mtmp;
- mtmp = ecdsa->meth;
- if (mtmp->finish) mtmp->finish(ecdsa);
- if (ecdsa->engine)
- {
- ENGINE_finish(ecdsa->engine);
- ecdsa->engine = NULL;
- }
- ecdsa->meth = meth;
- if (meth->init) meth->init(ecdsa);
- return 1;
+ ECDSA_DATA *ret;
+
+ ret = OPENSSL_malloc(sizeof(*ret));
+ if (ret == NULL) {
+ ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+
+ ret->init = NULL;
+
+ ret->meth = ECDSA_get_default_method();
+ ret->engine = engine;
+#ifndef OPENSSL_NO_ENGINE
+ if (!ret->engine)
+ ret->engine = ENGINE_get_default_ECDSA();
+ if (ret->engine) {
+ ret->meth = ENGINE_get_ECDSA(ret->engine);
+ if (!ret->meth) {
+ ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
+ ENGINE_finish(ret->engine);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+ }
+#endif
+
+ ret->flags = ret->meth->flags;
+ CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
+ return (ret);
}
-ECDSA *ECDSA_new_method(ENGINE *engine)
+static void *ecdsa_data_new(void)
{
- ECDSA *ret;
-
- ret=(ECDSA *)OPENSSL_malloc(sizeof(ECDSA));
- if (ret == NULL)
- {
- ECDSAerr(ECDSA_F_ECDSA_NEW,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
-
- ret->meth = ECDSA_get_default_method();
- ret->engine = engine;
- if (!ret->engine)
- ret->engine = ENGINE_get_default_ECDSA();
- if (ret->engine)
- {
- ret->meth = ENGINE_get_ECDSA(ret->engine);
- if (!ret->meth)
- {
- ECDSAerr(ECDSA_R_ECDSA_F_ECDSA_NEW, ERR_R_ENGINE_LIB);
- ENGINE_finish(ret->engine);
- OPENSSL_free(ret);
- return NULL;
- }
- }
-
- ret->version = 1;
- ret->conversion_form = ECDSA_get_default_conversion_form();
- ret->group = NULL;
-
- ret->pub_key = NULL;
- ret->priv_key = NULL;
-
- ret->kinv = NULL;
- ret->r = NULL;
-
- ret->references = 1;
- ret->flags = ret->meth->flags;
- CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
- if ((ret->meth->init != NULL) && !ret->meth->init(ret))
- {
- CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
- OPENSSL_free(ret);
- ret=NULL;
- }
-
- return(ret);
+ return (void *)ECDSA_DATA_new_method(NULL);
}
-void ECDSA_free(ECDSA *r)
+static void *ecdsa_data_dup(void *data)
{
- int i;
+ ECDSA_DATA *r = (ECDSA_DATA *)data;
- if (r == NULL) return;
+ /* XXX: dummy operation */
+ if (r == NULL)
+ return NULL;
- i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_ECDSA);
-#ifdef REF_PRINT
- REF_PRINT("ECDSA",r);
-#endif
- if (i > 0) return;
-#ifdef REF_CHECK
- if (i < 0)
- {
- fprintf(stderr,"ECDSA_free, bad reference count\n");
- abort();
- }
+ return ecdsa_data_new();
+}
+
+static void ecdsa_data_free(void *data)
+{
+ ECDSA_DATA *r = (ECDSA_DATA *)data;
+
+#ifndef OPENSSL_NO_ENGINE
+ if (r->engine)
+ ENGINE_finish(r->engine);
#endif
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
- if (r->meth->finish)
- r->meth->finish(r);
- if (r->engine)
- ENGINE_finish(r->engine);
+ OPENSSL_clear_free((void *)r, sizeof(ECDSA_DATA));
+}
+
+ECDSA_DATA *ecdsa_check(EC_KEY *key)
+{
+ ECDSA_DATA *ecdsa_data;
- CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
+ void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup,
+ ecdsa_data_free, ecdsa_data_free);
+ if (data == NULL) {
+ ecdsa_data = (ECDSA_DATA *)ecdsa_data_new();
+ if (ecdsa_data == NULL)
+ return NULL;
+ data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
+ ecdsa_data_dup, ecdsa_data_free,
+ ecdsa_data_free);
+ if (data != NULL) {
+ /*
+ * Another thread raced us to install the key_method data and
+ * won.
+ */
+ ecdsa_data_free(ecdsa_data);
+ ecdsa_data = (ECDSA_DATA *)data;
+ }
+ } else
+ ecdsa_data = (ECDSA_DATA *)data;
- if (r->group != NULL) EC_GROUP_free(r->group);
- if (r->pub_key != NULL) EC_POINT_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);
- OPENSSL_free(r);
+ return ecdsa_data;
}
-int ECDSA_size(const ECDSA *r)
+int ECDSA_size(const EC_KEY *r)
{
- int ret,i;
- ASN1_INTEGER bs;
- BIGNUM *order=NULL;
- unsigned char buf[4];
-
- if (r == NULL || r->group == NULL)
- return 0;
- if ((order = BN_new()) == NULL) return 0;
- if (!EC_GROUP_get_order(r->group,order,NULL))
- {
- BN_clear_free(order);
- return 0;
- }
- i=BN_num_bits(order);
- 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);
- BN_clear_free(order);
- return(ret);
+ int ret, i;
+ ASN1_INTEGER bs;
+ BIGNUM *order = NULL;
+ unsigned char buf[4];
+ const EC_GROUP *group;
+
+ if (r == NULL)
+ return 0;
+ group = EC_KEY_get0_group(r);
+ if (group == NULL)
+ return 0;
+
+ if ((order = BN_new()) == NULL)
+ return 0;
+ if (!EC_GROUP_get_order(group, order, NULL)) {
+ BN_clear_free(order);
+ return 0;
+ }
+ i = BN_num_bits(order);
+ 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);
+ BN_clear_free(order);
+ return (ret);
}
-int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
- CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
+int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg)
{
- return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
- new_func, dup_func, free_func);
+ ECDSA_DATA *ecdsa;
+ ecdsa = ecdsa_check(d);
+ if (ecdsa == NULL)
+ return 0;
+ return (CRYPTO_set_ex_data(&ecdsa->ex_data, idx, arg));
}
-int ECDSA_set_ex_data(ECDSA *d, int idx, void *arg)
+void *ECDSA_get_ex_data(EC_KEY *d, int idx)
{
- return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
+ ECDSA_DATA *ecdsa;
+ ecdsa = ecdsa_check(d);
+ if (ecdsa == NULL)
+ return NULL;
+ return (CRYPTO_get_ex_data(&ecdsa->ex_data, idx));
}
-void *ECDSA_get_ex_data(ECDSA *d, int idx)
+ECDSA_METHOD *ECDSA_METHOD_new(const ECDSA_METHOD *ecdsa_meth)
{
- return(CRYPTO_get_ex_data(&d->ex_data,idx));
+ ECDSA_METHOD *ret;
+
+ ret = OPENSSL_zalloc(sizeof(*ret));
+ if (ret == NULL) {
+ ECDSAerr(ECDSA_F_ECDSA_METHOD_NEW, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ if (ecdsa_meth)
+ *ret = *ecdsa_meth;
+ ret->flags |= ECDSA_METHOD_FLAG_ALLOCATED;
+ return ret;
}
-int ECDSA_up_ref(ECDSA *ecdsa)
+void ECDSA_METHOD_set_sign(ECDSA_METHOD *ecdsa_method,
+ ECDSA_SIG *(*ecdsa_do_sign) (const unsigned char
+ *dgst, int dgst_len,
+ const BIGNUM *inv,
+ const BIGNUM *rp,
+ EC_KEY *eckey))
{
- int i = CRYPTO_add(&ecdsa->references, 1, CRYPTO_LOCK_ECDSA);
-#ifdef REF_PRINT
- REF_PRINT("ECDSA",r);
-#endif
-#ifdef REF_CHECK
- if (i < 2)
- {
- fprintf(stderr, "ECDSA_up_ref, bad reference count\n");
- abort();
- }
-#endif
- return ((i > 1) ? 1 : 0);
+ ecdsa_method->ecdsa_do_sign = ecdsa_do_sign;
+}
+
+void ECDSA_METHOD_set_sign_setup(ECDSA_METHOD *ecdsa_method,
+ int (*ecdsa_sign_setup) (EC_KEY *eckey,
+ BN_CTX *ctx,
+ BIGNUM **kinv,
+ BIGNUM **r))
+{
+ ecdsa_method->ecdsa_sign_setup = ecdsa_sign_setup;
}
-
-void ECDSA_set_conversion_form(ECDSA *ecdsa, const point_conversion_form_t form)
+
+void ECDSA_METHOD_set_verify(ECDSA_METHOD *ecdsa_method,
+ int (*ecdsa_do_verify) (const unsigned char
+ *dgst, int dgst_len,
+ const ECDSA_SIG *sig,
+ EC_KEY *eckey))
{
- if (ecdsa) ecdsa->conversion_form = form;
+ ecdsa_method->ecdsa_do_verify = ecdsa_do_verify;
}
-point_conversion_form_t ECDSA_get_conversion_form(const ECDSA *ecdsa)
+void ECDSA_METHOD_set_flags(ECDSA_METHOD *ecdsa_method, int flags)
{
- return ecdsa ? ecdsa->conversion_form : 0;
+ ecdsa_method->flags = flags | ECDSA_METHOD_FLAG_ALLOCATED;
}
-static point_conversion_form_t default_conversion_form = POINT_CONVERSION_UNCOMPRESSED;
+void ECDSA_METHOD_set_name(ECDSA_METHOD *ecdsa_method, char *name)
+{
+ ecdsa_method->name = name;
+}
+
+void ECDSA_METHOD_free(ECDSA_METHOD *ecdsa_method)
+{
+ if (!ecdsa_method)
+ return;
+ if (ecdsa_method->flags & ECDSA_METHOD_FLAG_ALLOCATED)
+ OPENSSL_free(ecdsa_method);
+}
-void ECDSA_set_default_conversion_form(const point_conversion_form_t form)
+void ECDSA_METHOD_set_app_data(ECDSA_METHOD *ecdsa_method, void *app)
{
- default_conversion_form = form;
+ ecdsa_method->app_data = app;
}
-point_conversion_form_t ECDSA_get_default_conversion_form(void)
+void *ECDSA_METHOD_get_app_data(ECDSA_METHOD *ecdsa_method)
{
- return default_conversion_form;
+ return ecdsa_method->app_data;
}
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