6343829a39
knock-on work than expected - they've been extracted into a patch series that can be completed elsewhere, or in a different branch, before merging back to HEAD.
1429 lines
34 KiB
C
1429 lines
34 KiB
C
/* crypto/ec/ec_asn1.c */
|
|
/*
|
|
* Written by Nils Larsch for the OpenSSL project.
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 2000-2003 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.
|
|
*
|
|
* 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 acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* licensing@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED 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 OpenSSL PROJECT OR
|
|
* ITS 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.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include "ec_lcl.h"
|
|
#include <openssl/err.h>
|
|
#include <openssl/asn1t.h>
|
|
#include <openssl/objects.h>
|
|
|
|
|
|
int EC_GROUP_get_basis_type(const EC_GROUP *group)
|
|
{
|
|
int i=0;
|
|
|
|
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
|
|
NID_X9_62_characteristic_two_field)
|
|
/* everything else is currently not supported */
|
|
return 0;
|
|
|
|
while (group->poly[i] != 0)
|
|
i++;
|
|
|
|
if (i == 4)
|
|
return NID_X9_62_ppBasis;
|
|
else if (i == 2)
|
|
return NID_X9_62_tpBasis;
|
|
else
|
|
/* everything else is currently not supported */
|
|
return 0;
|
|
}
|
|
|
|
int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k)
|
|
{
|
|
if (group == NULL)
|
|
return 0;
|
|
|
|
if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve
|
|
|| !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] == 0)))
|
|
{
|
|
ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
|
|
return 0;
|
|
}
|
|
|
|
if (k)
|
|
*k = group->poly[1];
|
|
|
|
return 1;
|
|
}
|
|
|
|
int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1,
|
|
unsigned int *k2, unsigned int *k3)
|
|
{
|
|
if (group == NULL)
|
|
return 0;
|
|
|
|
if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve
|
|
|| !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] != 0) && (group->poly[3] != 0) && (group->poly[4] == 0)))
|
|
{
|
|
ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
|
|
return 0;
|
|
}
|
|
|
|
if (k1)
|
|
*k1 = group->poly[3];
|
|
if (k2)
|
|
*k2 = group->poly[2];
|
|
if (k3)
|
|
*k3 = group->poly[1];
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
/* some structures needed for the asn1 encoding */
|
|
typedef struct x9_62_pentanomial_st {
|
|
long k1;
|
|
long k2;
|
|
long k3;
|
|
} X9_62_PENTANOMIAL;
|
|
|
|
typedef struct x9_62_characteristic_two_st {
|
|
long m;
|
|
ASN1_OBJECT *type;
|
|
union {
|
|
char *ptr;
|
|
/* NID_X9_62_onBasis */
|
|
ASN1_NULL *onBasis;
|
|
/* NID_X9_62_tpBasis */
|
|
ASN1_INTEGER *tpBasis;
|
|
/* NID_X9_62_ppBasis */
|
|
X9_62_PENTANOMIAL *ppBasis;
|
|
/* anything else */
|
|
ASN1_TYPE *other;
|
|
} p;
|
|
} X9_62_CHARACTERISTIC_TWO;
|
|
|
|
typedef struct x9_62_fieldid_st {
|
|
ASN1_OBJECT *fieldType;
|
|
union {
|
|
char *ptr;
|
|
/* NID_X9_62_prime_field */
|
|
ASN1_INTEGER *prime;
|
|
/* NID_X9_62_characteristic_two_field */
|
|
X9_62_CHARACTERISTIC_TWO *char_two;
|
|
/* anything else */
|
|
ASN1_TYPE *other;
|
|
} p;
|
|
} X9_62_FIELDID;
|
|
|
|
typedef struct x9_62_curve_st {
|
|
ASN1_OCTET_STRING *a;
|
|
ASN1_OCTET_STRING *b;
|
|
ASN1_BIT_STRING *seed;
|
|
} X9_62_CURVE;
|
|
|
|
typedef struct ec_parameters_st {
|
|
long version;
|
|
X9_62_FIELDID *fieldID;
|
|
X9_62_CURVE *curve;
|
|
ASN1_OCTET_STRING *base;
|
|
ASN1_INTEGER *order;
|
|
ASN1_INTEGER *cofactor;
|
|
} ECPARAMETERS;
|
|
|
|
struct ecpk_parameters_st {
|
|
int type;
|
|
union {
|
|
ASN1_OBJECT *named_curve;
|
|
ECPARAMETERS *parameters;
|
|
ASN1_NULL *implicitlyCA;
|
|
} value;
|
|
}/* ECPKPARAMETERS */;
|
|
|
|
/* SEC1 ECPrivateKey */
|
|
typedef struct ec_privatekey_st {
|
|
long version;
|
|
ASN1_OCTET_STRING *privateKey;
|
|
ECPKPARAMETERS *parameters;
|
|
ASN1_BIT_STRING *publicKey;
|
|
} EC_PRIVATEKEY;
|
|
|
|
/* the OpenSSL ASN.1 definitions */
|
|
ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
|
|
ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG),
|
|
ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG),
|
|
ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG)
|
|
} ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
|
|
|
|
DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
|
|
IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
|
|
|
|
ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY);
|
|
|
|
ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = {
|
|
ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)),
|
|
ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)),
|
|
ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL))
|
|
} ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL);
|
|
|
|
ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
|
|
ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG),
|
|
ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT),
|
|
ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO)
|
|
} ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
|
|
|
|
DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
|
|
IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
|
|
|
|
ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY);
|
|
|
|
ASN1_ADB(X9_62_FIELDID) = {
|
|
ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)),
|
|
ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO))
|
|
} ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL);
|
|
|
|
ASN1_SEQUENCE(X9_62_FIELDID) = {
|
|
ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
|
|
ASN1_ADB_OBJECT(X9_62_FIELDID)
|
|
} ASN1_SEQUENCE_END(X9_62_FIELDID)
|
|
|
|
ASN1_SEQUENCE(X9_62_CURVE) = {
|
|
ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
|
|
ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
|
|
ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
|
|
} ASN1_SEQUENCE_END(X9_62_CURVE)
|
|
|
|
ASN1_SEQUENCE(ECPARAMETERS) = {
|
|
ASN1_SIMPLE(ECPARAMETERS, version, LONG),
|
|
ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
|
|
ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
|
|
ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
|
|
ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
|
|
ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER)
|
|
} ASN1_SEQUENCE_END(ECPARAMETERS)
|
|
|
|
DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
|
|
IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
|
|
|
|
ASN1_CHOICE(ECPKPARAMETERS) = {
|
|
ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
|
|
ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
|
|
ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
|
|
} ASN1_CHOICE_END(ECPKPARAMETERS)
|
|
|
|
DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
|
|
DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS)
|
|
IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
|
|
|
|
ASN1_SEQUENCE(EC_PRIVATEKEY) = {
|
|
ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG),
|
|
ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
|
|
ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
|
|
ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
|
|
} ASN1_SEQUENCE_END(EC_PRIVATEKEY)
|
|
|
|
DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
|
|
DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY)
|
|
IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
|
|
|
|
/* some declarations of internal function */
|
|
|
|
/* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
|
|
static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *);
|
|
/* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
|
|
static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
|
|
/* ec_asn1_parameters2group() creates a EC_GROUP object from a
|
|
* ECPARAMETERS object */
|
|
static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *);
|
|
/* ec_asn1_group2parameters() creates a ECPARAMETERS object from a
|
|
* EC_GROUP object */
|
|
static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *,ECPARAMETERS *);
|
|
/* ec_asn1_pkparameters2group() creates a EC_GROUP object from a
|
|
* ECPKPARAMETERS object */
|
|
static EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *);
|
|
/* ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a
|
|
* EC_GROUP object */
|
|
static ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *,
|
|
ECPKPARAMETERS *);
|
|
|
|
|
|
/* the function definitions */
|
|
|
|
static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field)
|
|
{
|
|
int ok=0, nid;
|
|
BIGNUM *tmp = NULL;
|
|
|
|
if (group == NULL || field == NULL)
|
|
return 0;
|
|
|
|
/* clear the old values (if necessary) */
|
|
if (field->fieldType != NULL)
|
|
ASN1_OBJECT_free(field->fieldType);
|
|
if (field->p.other != NULL)
|
|
ASN1_TYPE_free(field->p.other);
|
|
|
|
nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
|
|
/* set OID for the field */
|
|
if ((field->fieldType = OBJ_nid2obj(nid)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (nid == NID_X9_62_prime_field)
|
|
{
|
|
if ((tmp = BN_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
/* the parameters are specified by the prime number p */
|
|
if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
/* set the prime number */
|
|
field->p.prime = BN_to_ASN1_INTEGER(tmp,NULL);
|
|
if (field->p.prime == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
else /* nid == NID_X9_62_characteristic_two_field */
|
|
{
|
|
int field_type;
|
|
X9_62_CHARACTERISTIC_TWO *char_two;
|
|
|
|
field->p.char_two = X9_62_CHARACTERISTIC_TWO_new();
|
|
char_two = field->p.char_two;
|
|
|
|
if (char_two == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
char_two->m = (long)EC_GROUP_get_degree(group);
|
|
|
|
field_type = EC_GROUP_get_basis_type(group);
|
|
|
|
if (field_type == 0)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
/* set base type OID */
|
|
if ((char_two->type = OBJ_nid2obj(field_type)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (field_type == NID_X9_62_tpBasis)
|
|
{
|
|
unsigned int k;
|
|
|
|
if (!EC_GROUP_get_trinomial_basis(group, &k))
|
|
goto err;
|
|
|
|
char_two->p.tpBasis = ASN1_INTEGER_new();
|
|
if (!char_two->p.tpBasis)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID,
|
|
ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
else if (field_type == NID_X9_62_ppBasis)
|
|
{
|
|
unsigned int k1, k2, k3;
|
|
|
|
if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
|
|
goto err;
|
|
|
|
char_two->p.ppBasis = X9_62_PENTANOMIAL_new();
|
|
if (!char_two->p.ppBasis)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/* set k? values */
|
|
char_two->p.ppBasis->k1 = (long)k1;
|
|
char_two->p.ppBasis->k2 = (long)k2;
|
|
char_two->p.ppBasis->k3 = (long)k3;
|
|
}
|
|
else /* field_type == NID_X9_62_onBasis */
|
|
{
|
|
/* for ONB the parameters are (asn1) NULL */
|
|
char_two->p.onBasis = ASN1_NULL_new();
|
|
if (!char_two->p.onBasis)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
}
|
|
}
|
|
|
|
ok = 1;
|
|
|
|
err : if (tmp)
|
|
BN_free(tmp);
|
|
return(ok);
|
|
}
|
|
|
|
static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve)
|
|
{
|
|
int ok=0, nid;
|
|
BIGNUM *tmp_1=NULL, *tmp_2=NULL;
|
|
unsigned char *buffer_1=NULL, *buffer_2=NULL,
|
|
*a_buf=NULL, *b_buf=NULL;
|
|
size_t len_1, len_2;
|
|
unsigned char char_zero = 0;
|
|
|
|
if (!group || !curve || !curve->a || !curve->b)
|
|
return 0;
|
|
|
|
if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
|
|
|
|
/* get a and b */
|
|
if (nid == NID_X9_62_prime_field)
|
|
{
|
|
if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
else /* nid == NID_X9_62_characteristic_two_field */
|
|
{
|
|
if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
len_1 = (size_t)BN_num_bytes(tmp_1);
|
|
len_2 = (size_t)BN_num_bytes(tmp_2);
|
|
|
|
if (len_1 == 0)
|
|
{
|
|
/* len_1 == 0 => a == 0 */
|
|
a_buf = &char_zero;
|
|
len_1 = 1;
|
|
}
|
|
else
|
|
{
|
|
if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if ( (len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
a_buf = buffer_1;
|
|
}
|
|
|
|
if (len_2 == 0)
|
|
{
|
|
/* len_2 == 0 => b == 0 */
|
|
b_buf = &char_zero;
|
|
len_2 = 1;
|
|
}
|
|
else
|
|
{
|
|
if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if ( (len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
b_buf = buffer_2;
|
|
}
|
|
|
|
/* set a and b */
|
|
if (!M_ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) ||
|
|
!M_ASN1_OCTET_STRING_set(curve->b, b_buf, len_2))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the seed (optional) */
|
|
if (group->seed)
|
|
{
|
|
if (!curve->seed)
|
|
if ((curve->seed = ASN1_BIT_STRING_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
|
|
curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT;
|
|
if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
|
|
(int)group->seed_len))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (curve->seed)
|
|
{
|
|
ASN1_BIT_STRING_free(curve->seed);
|
|
curve->seed = NULL;
|
|
}
|
|
}
|
|
|
|
ok = 1;
|
|
|
|
err: if (buffer_1)
|
|
OPENSSL_free(buffer_1);
|
|
if (buffer_2)
|
|
OPENSSL_free(buffer_2);
|
|
if (tmp_1)
|
|
BN_free(tmp_1);
|
|
if (tmp_2)
|
|
BN_free(tmp_2);
|
|
return(ok);
|
|
}
|
|
|
|
static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group,
|
|
ECPARAMETERS *param)
|
|
{
|
|
int ok=0;
|
|
size_t len=0;
|
|
ECPARAMETERS *ret=NULL;
|
|
BIGNUM *tmp=NULL;
|
|
unsigned char *buffer=NULL;
|
|
const EC_POINT *point=NULL;
|
|
point_conversion_form_t form;
|
|
|
|
if ((tmp = BN_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (param == NULL)
|
|
{
|
|
if ((ret = ECPARAMETERS_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
ret = param;
|
|
|
|
/* set the version (always one) */
|
|
ret->version = (long)0x1;
|
|
|
|
/* set the fieldID */
|
|
if (!ec_asn1_group2fieldid(group, ret->fieldID))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the curve */
|
|
if (!ec_asn1_group2curve(group, ret->curve))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the base point */
|
|
if ((point = EC_GROUP_get0_generator(group)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR);
|
|
goto err;
|
|
}
|
|
|
|
form = EC_GROUP_get_point_conversion_form(group);
|
|
|
|
len = EC_POINT_point2oct(group, point, form, NULL, len, NULL);
|
|
if (len == 0)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
if ((buffer = OPENSSL_malloc(len)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (!ASN1_OCTET_STRING_set(ret->base, buffer, len))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the order */
|
|
if (!EC_GROUP_get_order(group, tmp, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
|
|
if (ret->order == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* set the cofactor (optional) */
|
|
if (EC_GROUP_get_cofactor(group, tmp, NULL))
|
|
{
|
|
ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
|
|
if (ret->cofactor == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
ok = 1;
|
|
|
|
err : if(!ok)
|
|
{
|
|
if (ret && !param)
|
|
ECPARAMETERS_free(ret);
|
|
ret = NULL;
|
|
}
|
|
if (tmp)
|
|
BN_free(tmp);
|
|
if (buffer)
|
|
OPENSSL_free(buffer);
|
|
return(ret);
|
|
}
|
|
|
|
ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group,
|
|
ECPKPARAMETERS *params)
|
|
{
|
|
int ok = 1, tmp;
|
|
ECPKPARAMETERS *ret = params;
|
|
|
|
if (ret == NULL)
|
|
{
|
|
if ((ret = ECPKPARAMETERS_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS,
|
|
ERR_R_MALLOC_FAILURE);
|
|
return NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (ret->type == 0 && ret->value.named_curve)
|
|
ASN1_OBJECT_free(ret->value.named_curve);
|
|
else if (ret->type == 1 && ret->value.parameters)
|
|
ECPARAMETERS_free(ret->value.parameters);
|
|
}
|
|
|
|
if (EC_GROUP_get_asn1_flag(group))
|
|
{
|
|
/* use the asn1 OID to describe the
|
|
* the elliptic curve parameters
|
|
*/
|
|
tmp = EC_GROUP_get_curve_name(group);
|
|
if (tmp)
|
|
{
|
|
ret->type = 0;
|
|
if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
|
|
ok = 0;
|
|
}
|
|
else
|
|
/* we don't kmow the nid => ERROR */
|
|
ok = 0;
|
|
}
|
|
else
|
|
{
|
|
/* use the ECPARAMETERS structure */
|
|
ret->type = 1;
|
|
if ((ret->value.parameters = ec_asn1_group2parameters(
|
|
group, NULL)) == NULL)
|
|
ok = 0;
|
|
}
|
|
|
|
if (!ok)
|
|
{
|
|
ECPKPARAMETERS_free(ret);
|
|
return NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params)
|
|
{
|
|
int ok = 0, tmp;
|
|
EC_GROUP *ret = NULL;
|
|
BIGNUM *p = NULL, *a = NULL, *b = NULL;
|
|
EC_POINT *point=NULL;
|
|
long field_bits;
|
|
|
|
if (!params->fieldID || !params->fieldID->fieldType ||
|
|
!params->fieldID->p.ptr)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
/* now extract the curve parameters a and b */
|
|
if (!params->curve || !params->curve->a ||
|
|
!params->curve->a->data || !params->curve->b ||
|
|
!params->curve->b->data)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
|
|
if (a == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
|
|
if (b == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* get the field parameters */
|
|
tmp = OBJ_obj2nid(params->fieldID->fieldType);
|
|
|
|
if (tmp == NID_X9_62_characteristic_two_field)
|
|
{
|
|
X9_62_CHARACTERISTIC_TWO *char_two;
|
|
|
|
char_two = params->fieldID->p.char_two;
|
|
|
|
field_bits = char_two->m;
|
|
if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE);
|
|
goto err;
|
|
}
|
|
|
|
if ((p = BN_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/* get the base type */
|
|
tmp = OBJ_obj2nid(char_two->type);
|
|
|
|
if (tmp == NID_X9_62_tpBasis)
|
|
{
|
|
long tmp_long;
|
|
|
|
if (!char_two->p.tpBasis)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
|
|
|
|
if (!(char_two->m > tmp_long && tmp_long > 0))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_TRINOMIAL_BASIS);
|
|
goto err;
|
|
}
|
|
|
|
/* create the polynomial */
|
|
if (!BN_set_bit(p, (int)char_two->m))
|
|
goto err;
|
|
if (!BN_set_bit(p, (int)tmp_long))
|
|
goto err;
|
|
if (!BN_set_bit(p, 0))
|
|
goto err;
|
|
}
|
|
else if (tmp == NID_X9_62_ppBasis)
|
|
{
|
|
X9_62_PENTANOMIAL *penta;
|
|
|
|
penta = char_two->p.ppBasis;
|
|
if (!penta)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if (!(char_two->m > penta->k3 && penta->k3 > penta->k2 && penta->k2 > penta->k1 && penta->k1 > 0))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_PENTANOMIAL_BASIS);
|
|
goto err;
|
|
}
|
|
|
|
/* create the polynomial */
|
|
if (!BN_set_bit(p, (int)char_two->m)) goto err;
|
|
if (!BN_set_bit(p, (int)penta->k1)) goto err;
|
|
if (!BN_set_bit(p, (int)penta->k2)) goto err;
|
|
if (!BN_set_bit(p, (int)penta->k3)) goto err;
|
|
if (!BN_set_bit(p, 0)) goto err;
|
|
}
|
|
else if (tmp == NID_X9_62_onBasis)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED);
|
|
goto err;
|
|
}
|
|
else /* error */
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
/* create the EC_GROUP structure */
|
|
ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
|
|
}
|
|
else if (tmp == NID_X9_62_prime_field)
|
|
{
|
|
/* we have a curve over a prime field */
|
|
/* extract the prime number */
|
|
if (!params->fieldID->p.prime)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
|
|
if (p == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (BN_is_negative(p) || BN_is_zero(p))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD);
|
|
goto err;
|
|
}
|
|
|
|
field_bits = BN_num_bits(p);
|
|
if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE);
|
|
goto err;
|
|
}
|
|
|
|
/* create the EC_GROUP structure */
|
|
ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
|
|
}
|
|
else
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD);
|
|
goto err;
|
|
}
|
|
|
|
if (ret == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* extract seed (optional) */
|
|
if (params->curve->seed != NULL)
|
|
{
|
|
if (ret->seed != NULL)
|
|
OPENSSL_free(ret->seed);
|
|
if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length)))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
memcpy(ret->seed, params->curve->seed->data,
|
|
params->curve->seed->length);
|
|
ret->seed_len = params->curve->seed->length;
|
|
}
|
|
|
|
if (!params->order || !params->base || !params->base->data)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if ((point = EC_POINT_new(ret)) == NULL) goto err;
|
|
|
|
/* set the point conversion form */
|
|
EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
|
|
(params->base->data[0] & ~0x01));
|
|
|
|
/* extract the ec point */
|
|
if (!EC_POINT_oct2point(ret, point, params->base->data,
|
|
params->base->length, NULL))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* extract the order */
|
|
if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
if (BN_is_negative(a) || BN_is_zero(a))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER);
|
|
goto err;
|
|
}
|
|
if (BN_num_bits(a) > (int)field_bits + 1) /* Hasse bound */
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER);
|
|
goto err;
|
|
}
|
|
|
|
/* extract the cofactor (optional) */
|
|
if (params->cofactor == NULL)
|
|
{
|
|
if (b)
|
|
{
|
|
BN_free(b);
|
|
b = NULL;
|
|
}
|
|
}
|
|
else
|
|
if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
/* set the generator, order and cofactor (if present) */
|
|
if (!EC_GROUP_set_generator(ret, point, a, b))
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
ok = 1;
|
|
|
|
err: if (!ok)
|
|
{
|
|
if (ret)
|
|
EC_GROUP_clear_free(ret);
|
|
ret = NULL;
|
|
}
|
|
|
|
if (p)
|
|
BN_free(p);
|
|
if (a)
|
|
BN_free(a);
|
|
if (b)
|
|
BN_free(b);
|
|
if (point)
|
|
EC_POINT_free(point);
|
|
return(ret);
|
|
}
|
|
|
|
EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params)
|
|
{
|
|
EC_GROUP *ret=NULL;
|
|
int tmp=0;
|
|
|
|
if (params == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
|
|
EC_R_MISSING_PARAMETERS);
|
|
return NULL;
|
|
}
|
|
|
|
if (params->type == 0)
|
|
{ /* the curve is given by an OID */
|
|
tmp = OBJ_obj2nid(params->value.named_curve);
|
|
if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
|
|
EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
|
|
return NULL;
|
|
}
|
|
EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
|
|
}
|
|
else if (params->type == 1)
|
|
{ /* the parameters are given by a ECPARAMETERS
|
|
* structure */
|
|
ret = ec_asn1_parameters2group(params->value.parameters);
|
|
if (!ret)
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB);
|
|
return NULL;
|
|
}
|
|
EC_GROUP_set_asn1_flag(ret, 0x0);
|
|
}
|
|
else if (params->type == 2)
|
|
{ /* implicitlyCA */
|
|
return NULL;
|
|
}
|
|
else
|
|
{
|
|
ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_ASN1_ERROR);
|
|
return NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
|
|
|
|
EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
|
|
{
|
|
EC_GROUP *group = NULL;
|
|
ECPKPARAMETERS *params = NULL;
|
|
|
|
if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
|
|
ECPKPARAMETERS_free(params);
|
|
return NULL;
|
|
}
|
|
|
|
if ((group = ec_asn1_pkparameters2group(params)) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
if (a && *a)
|
|
EC_GROUP_clear_free(*a);
|
|
if (a)
|
|
*a = group;
|
|
|
|
ECPKPARAMETERS_free(params);
|
|
return(group);
|
|
}
|
|
|
|
int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
|
|
{
|
|
int ret=0;
|
|
ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL);
|
|
if (tmp == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
|
|
return 0;
|
|
}
|
|
if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0)
|
|
{
|
|
ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
|
|
ECPKPARAMETERS_free(tmp);
|
|
return 0;
|
|
}
|
|
ECPKPARAMETERS_free(tmp);
|
|
return(ret);
|
|
}
|
|
|
|
/* some EC_KEY functions */
|
|
|
|
EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
|
|
{
|
|
int ok=0;
|
|
EC_KEY *ret=NULL;
|
|
EC_PRIVATEKEY *priv_key=NULL;
|
|
|
|
if ((priv_key = EC_PRIVATEKEY_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
|
|
return NULL;
|
|
}
|
|
|
|
if ((priv_key = d2i_EC_PRIVATEKEY(&priv_key, in, len)) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
EC_PRIVATEKEY_free(priv_key);
|
|
return NULL;
|
|
}
|
|
|
|
if (a == NULL || *a == NULL)
|
|
{
|
|
if ((ret = EC_KEY_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (a)
|
|
*a = ret;
|
|
}
|
|
else
|
|
ret = *a;
|
|
|
|
if (priv_key->parameters)
|
|
{
|
|
if (ret->group)
|
|
EC_GROUP_clear_free(ret->group);
|
|
ret->group = ec_asn1_pkparameters2group(priv_key->parameters);
|
|
}
|
|
|
|
if (ret->group == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
ret->version = priv_key->version;
|
|
|
|
if (priv_key->privateKey)
|
|
{
|
|
ret->priv_key = BN_bin2bn(
|
|
M_ASN1_STRING_data(priv_key->privateKey),
|
|
M_ASN1_STRING_length(priv_key->privateKey),
|
|
ret->priv_key);
|
|
if (ret->priv_key == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY,
|
|
ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY,
|
|
EC_R_MISSING_PRIVATE_KEY);
|
|
goto err;
|
|
}
|
|
|
|
if (priv_key->publicKey)
|
|
{
|
|
const unsigned char *pub_oct;
|
|
size_t pub_oct_len;
|
|
|
|
if (ret->pub_key)
|
|
EC_POINT_clear_free(ret->pub_key);
|
|
ret->pub_key = EC_POINT_new(ret->group);
|
|
if (ret->pub_key == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
pub_oct = M_ASN1_STRING_data(priv_key->publicKey);
|
|
pub_oct_len = M_ASN1_STRING_length(priv_key->publicKey);
|
|
/* save the point conversion form */
|
|
ret->conv_form = (point_conversion_form_t)(pub_oct[0] & ~0x01);
|
|
if (!EC_POINT_oct2point(ret->group, ret->pub_key,
|
|
pub_oct, pub_oct_len, NULL))
|
|
{
|
|
ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
ok = 1;
|
|
err:
|
|
if (!ok)
|
|
{
|
|
if (ret)
|
|
EC_KEY_free(ret);
|
|
ret = NULL;
|
|
}
|
|
|
|
if (priv_key)
|
|
EC_PRIVATEKEY_free(priv_key);
|
|
|
|
return(ret);
|
|
}
|
|
|
|
int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
|
|
{
|
|
int ret=0, ok=0;
|
|
unsigned char *buffer=NULL;
|
|
size_t buf_len=0, tmp_len;
|
|
EC_PRIVATEKEY *priv_key=NULL;
|
|
|
|
if (a == NULL || a->group == NULL || a->priv_key == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY,
|
|
ERR_R_PASSED_NULL_PARAMETER);
|
|
goto err;
|
|
}
|
|
|
|
if ((priv_key = EC_PRIVATEKEY_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
priv_key->version = a->version;
|
|
|
|
buf_len = (size_t)BN_num_bytes(a->priv_key);
|
|
buffer = OPENSSL_malloc(buf_len);
|
|
if (buffer == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (!BN_bn2bin(a->priv_key, buffer))
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (!M_ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len))
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS))
|
|
{
|
|
if ((priv_key->parameters = ec_asn1_group2pkparameters(
|
|
a->group, priv_key->parameters)) == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (!(a->enc_flag & EC_PKEY_NO_PUBKEY))
|
|
{
|
|
priv_key->publicKey = M_ASN1_BIT_STRING_new();
|
|
if (priv_key->publicKey == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
tmp_len = EC_POINT_point2oct(a->group, a->pub_key,
|
|
a->conv_form, NULL, 0, NULL);
|
|
|
|
if (tmp_len > buf_len)
|
|
{
|
|
unsigned char *tmp_buffer = OPENSSL_realloc(buffer, tmp_len);
|
|
if (!tmp_buffer)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
buffer = tmp_buffer;
|
|
buf_len = tmp_len;
|
|
}
|
|
|
|
if (!EC_POINT_point2oct(a->group, a->pub_key,
|
|
a->conv_form, buffer, buf_len, NULL))
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
|
|
priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
|
|
priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
|
|
if (!M_ASN1_BIT_STRING_set(priv_key->publicKey, buffer,
|
|
buf_len))
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0)
|
|
{
|
|
ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
ok=1;
|
|
err:
|
|
if (buffer)
|
|
OPENSSL_free(buffer);
|
|
if (priv_key)
|
|
EC_PRIVATEKEY_free(priv_key);
|
|
return(ok?ret:0);
|
|
}
|
|
|
|
int i2d_ECParameters(EC_KEY *a, unsigned char **out)
|
|
{
|
|
if (a == NULL)
|
|
{
|
|
ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
|
|
return 0;
|
|
}
|
|
return i2d_ECPKParameters(a->group, out);
|
|
}
|
|
|
|
EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
|
|
{
|
|
EC_KEY *ret;
|
|
|
|
if (in == NULL || *in == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
|
|
return NULL;
|
|
}
|
|
|
|
if (a == NULL || *a == NULL)
|
|
{
|
|
if ((ret = EC_KEY_new()) == NULL)
|
|
{
|
|
ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
return NULL;
|
|
}
|
|
if (a)
|
|
*a = ret;
|
|
}
|
|
else
|
|
ret = *a;
|
|
|
|
if (!d2i_ECPKParameters(&ret->group, in, len))
|
|
{
|
|
ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
|
|
return NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len)
|
|
{
|
|
EC_KEY *ret=NULL;
|
|
|
|
if (a == NULL || (*a) == NULL || (*a)->group == NULL)
|
|
{
|
|
/* sorry, but a EC_GROUP-structur is necessary
|
|
* to set the public key */
|
|
ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
|
|
return 0;
|
|
}
|
|
ret = *a;
|
|
if (ret->pub_key == NULL &&
|
|
(ret->pub_key = EC_POINT_new(ret->group)) == NULL)
|
|
{
|
|
ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL))
|
|
{
|
|
ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
|
|
return 0;
|
|
}
|
|
/* save the point conversion form */
|
|
ret->conv_form = (point_conversion_form_t)(*in[0] & ~0x01);
|
|
*in += len;
|
|
return ret;
|
|
}
|
|
|
|
int i2o_ECPublicKey(EC_KEY *a, unsigned char **out)
|
|
{
|
|
size_t buf_len=0;
|
|
int new_buffer = 0;
|
|
|
|
if (a == NULL)
|
|
{
|
|
ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
|
|
return 0;
|
|
}
|
|
|
|
buf_len = EC_POINT_point2oct(a->group, a->pub_key,
|
|
a->conv_form, NULL, 0, NULL);
|
|
|
|
if (out == NULL || buf_len == 0)
|
|
/* out == NULL => just return the length of the octet string */
|
|
return buf_len;
|
|
|
|
if (*out == NULL)
|
|
{
|
|
if ((*out = OPENSSL_malloc(buf_len)) == NULL)
|
|
{
|
|
ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
new_buffer = 1;
|
|
}
|
|
if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
|
|
*out, buf_len, NULL))
|
|
{
|
|
ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
|
|
OPENSSL_free(*out);
|
|
*out = NULL;
|
|
return 0;
|
|
}
|
|
if (!new_buffer)
|
|
*out += buf_len;
|
|
return buf_len;
|
|
}
|