--- /dev/null
+/* crypto/ec/ec_asn1.c */
+/* ====================================================================
+ * Copyright (c) 2000-2002 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 "cryptlib.h"
+#include "ec_lcl.h"
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/objects.h>
+
+/* some structures needed for the asn1 encoding */
+typedef struct x9_62_fieldid_st {
+ ASN1_OBJECT *fieldType;
+ ASN1_TYPE *parameters;
+ } X9_62_FIELDID;
+
+typedef struct x9_62_characteristic_two_st {
+ ASN1_INTEGER *m;
+ ASN1_OBJECT *basis;
+ ASN1_TYPE *parameters;
+ } X9_62_CHARACTERISTIC_TWO;
+
+typedef struct x9_62_pentanomial_st {
+ ASN1_INTEGER k1;
+ ASN1_INTEGER k2;
+ ASN1_INTEGER k3;
+ } X9_62_PENTANOMIAL;
+
+typedef struct x9_62_curve_st {
+ ASN1_OCTET_STRING *a;
+ ASN1_OCTET_STRING *b;
+ ASN1_BIT_STRING *seed;
+ } X9_62_CURVE;
+
+struct ec_parameters_st {
+ ASN1_INTEGER *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 */;
+
+/* the OpenSSL asn1 definitions */
+
+ASN1_SEQUENCE(X9_62_FIELDID) = {
+ ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
+ ASN1_SIMPLE(X9_62_FIELDID, parameters, ASN1_ANY)
+} ASN1_SEQUENCE_END(X9_62_FIELDID)
+
+DECLARE_ASN1_FUNCTIONS_const(X9_62_FIELDID)
+DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_FIELDID, X9_62_FIELDID)
+IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_FIELDID)
+
+ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
+ ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, ASN1_INTEGER),
+ ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, basis, ASN1_OBJECT),
+ ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, parameters, ASN1_ANY)
+} ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
+
+DECLARE_ASN1_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO)
+DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO, X9_62_CHARACTERISTIC_TWO)
+IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO)
+
+ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
+ ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, ASN1_INTEGER),
+ ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, ASN1_INTEGER),
+ ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, ASN1_INTEGER)
+} ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
+
+DECLARE_ASN1_FUNCTIONS_const(X9_62_PENTANOMIAL)
+DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_PENTANOMIAL, X9_62_PENTANOMIAL)
+IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_PENTANOMIAL)
+
+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)
+
+DECLARE_ASN1_FUNCTIONS_const(X9_62_CURVE)
+DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CURVE, X9_62_CURVE)
+IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CURVE)
+
+ASN1_SEQUENCE(ECPARAMETERS) = {
+ ASN1_SIMPLE(ECPARAMETERS, version, ASN1_INTEGER),
+ 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_SIMPLE(ECPARAMETERS, cofactor, ASN1_INTEGER)
+} ASN1_SEQUENCE_END(ECPARAMETERS)
+
+DECLARE_ASN1_FUNCTIONS_const(ECPARAMETERS)
+IMPLEMENT_ASN1_FUNCTIONS_const(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)
+IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
+
+/* some internal functions */
+
+static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *, X9_62_FIELDID *);
+static X9_62_CURVE *ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
+static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *);
+static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *,
+ ECPARAMETERS *);
+
+static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *group,
+ X9_62_FIELDID *field)
+ {
+ int ok=0, nid;
+ X9_62_FIELDID *ret=NULL;
+ BIGNUM *tmp=NULL;
+
+ if (field == NULL)
+ {
+ if ((ret = X9_62_FIELDID_new()) == NULL)
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+ }
+ else
+ {
+ ret = field;
+ if (ret->fieldType != NULL)
+ ASN1_OBJECT_free(ret->fieldType);
+ if (ret->parameters != NULL)
+ ASN1_TYPE_free(ret->parameters);
+ }
+
+ nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
+
+ if ((ret->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;
+ }
+ if ((ret->parameters = ASN1_TYPE_new()) == NULL)
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ ret->parameters->type = V_ASN1_INTEGER;
+ if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL))
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
+ goto err;
+ }
+ ret->parameters->value.integer = BN_to_ASN1_INTEGER(tmp, NULL);
+ if (ret->parameters->value.integer == NULL)
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
+ goto err;
+ }
+ }
+ else
+ goto err;
+
+ ok = 1;
+
+err : if (!ok)
+ {
+ if (ret && !field)
+ X9_62_FIELDID_free(ret);
+ ret = NULL;
+ }
+ if (tmp)
+ BN_free(tmp);
+ return(ret);
+}
+
+static X9_62_CURVE *ec_asn1_group2curve(const EC_GROUP *group,
+ X9_62_CURVE *curve)
+ {
+ int ok=0, nid;
+ X9_62_CURVE *ret=NULL;
+ 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 ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL)
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (curve == NULL)
+ {
+ if ((ret = X9_62_CURVE_new()) == NULL)
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ }
+ else
+ {
+ ret = curve;
+ if (ret->a)
+ ASN1_OCTET_STRING_free(ret->a);
+ if (ret->b)
+ ASN1_OCTET_STRING_free(ret->b);
+ if (ret->seed)
+ ASN1_BIT_STRING_free(ret->seed);
+ }
+
+ 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;
+ }
+
+ 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;
+ }
+ }
+ else
+ goto err;
+
+ /* set a and b */
+ if ((ret->a = M_ASN1_OCTET_STRING_new()) == NULL ||
+ (ret->b = M_ASN1_OCTET_STRING_new()) == NULL )
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if (!M_ASN1_OCTET_STRING_set(ret->a, a_buf, len_1) ||
+ !M_ASN1_OCTET_STRING_set(ret->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 ((ret->seed = ASN1_BIT_STRING_new()) == NULL) goto err;
+ if (!ASN1_BIT_STRING_set(ret->seed, group->seed,
+ (int)group->seed_len))
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
+ goto err;
+ }
+ }
+ else
+ ret->seed = NULL;
+
+ ok = 1;
+
+err : if (!ok)
+ {
+ if (ret && !curve)
+ X9_62_CURVE_free(ret);
+ ret = NULL;
+ }
+ 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(ret);
+}
+
+static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group,
+ ECPARAMETERS *param)
+ {
+ int ok=0, i;
+ 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) */
+ if (ret->version == NULL && !(ret->version = ASN1_INTEGER_new()))
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if (!ASN1_INTEGER_set(ret->version, (long)0x1))
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
+ goto err;
+ }
+
+ /* set the fieldID */
+ ret->fieldID = ec_asn1_group2field(group, ret->fieldID);
+ if (ret->fieldID == NULL)
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
+ goto err;
+ }
+
+ /* set the curve */
+ ret->curve = ec_asn1_group2curve(group, ret->curve);
+ if (ret->curve == NULL)
+ {
+ 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;
+ }
+
+ i = EC_GROUP_get_asn1_flag(group);
+ if (i | OPENSSL_EC_COMPRESSED)
+ form = POINT_CONVERSION_COMPRESSED;
+ else if (i | OPENSSL_EC_UNCOMPRESSED)
+ form = POINT_CONVERSION_UNCOMPRESSED;
+ else if (i | OPENSSL_EC_HYBRID)
+ form = POINT_CONVERSION_HYBRID;
+ else
+ goto err;
+
+ 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 */
+ if (!EC_GROUP_get_cofactor(group, tmp, NULL))
+ {
+ ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
+ goto err;
+ }
+ 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);
+ }
+
+ tmp = EC_GROUP_get_asn1_flag(group);
+
+ if (tmp & OPENSSL_EC_NAMED_CURVE)
+ {
+ /* use the asn1 OID to describe the
+ * the elliptic curve parameters
+ */
+ tmp = EC_GROUP_get_nid(group);
+ if (tmp)
+ {
+ ret->type = 0;
+ if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
+ ok = 0;
+ }
+ else
+ {
+ /* we have no nid => use the normal
+ * ECPARAMETERS structure
+ */
+ ret->type = 1;
+ if ((ret->value.parameters = ec_asn1_group2parameters(
+ group, NULL)) == NULL)
+ ok = 0;
+ }
+ }
+ else if (tmp & OPENSSL_EC_EXPLICIT)
+ {
+ /* use the ECPARAMETERS structure */
+ ret->type = 1;
+ if ((ret->value.parameters = ec_asn1_group2parameters(
+ group, NULL)) == NULL)
+ ok = 0;
+ }
+ else
+ 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;
+
+ if (!params->fieldID || !params->fieldID->fieldType ||
+ !params->fieldID->parameters)
+ {
+ ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
+ goto err;
+ }
+
+ tmp = OBJ_obj2nid(params->fieldID->fieldType);
+
+ if (tmp == NID_X9_62_characteristic_two_field)
+ {
+ ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED);
+ goto err;
+ }
+ else if (tmp == NID_X9_62_prime_field)
+ {
+ /* we have a curve over a prime field */
+ /* extract the prime number */
+ if (params->fieldID->parameters->type != V_ASN1_INTEGER ||
+ !params->fieldID->parameters->value.integer)
+ {
+ ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
+ goto err;
+ }
+ p = ASN1_INTEGER_to_BN(params->fieldID->parameters->value.integer, NULL);
+ if (p == NULL)
+ {
+ ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
+ 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;
+ }
+ /* create the EC_GROUP structure */
+/* TODO */
+ ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
+ if (ret == NULL)
+ {
+ ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
+ goto err;
+ }
+ /* create the generator */
+ if ((point = EC_POINT_new(ret)) == NULL) goto err;
+ }
+ else
+ {
+ ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_UNKNOWN_FIELD);
+ goto err;
+ }
+
+ 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->cofactor || !params->base ||
+ !params->base->data)
+ {
+ ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
+ goto err;
+ }
+
+
+ a = ASN1_INTEGER_to_BN(params->order, a);
+ b = ASN1_INTEGER_to_BN(params->cofactor, b);
+ if (!a || !b)
+ {
+ ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
+ goto err;
+ }
+
+ 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;
+ }
+ 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_name(tmp)) == NULL)
+ {
+ ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
+ EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
+ return NULL;
+ }
+ tmp = EC_GROUP_get_asn1_flag(ret);
+ tmp = (tmp & ~0x03) | OPENSSL_EC_NAMED_CURVE;
+ EC_GROUP_set_asn1_flag(ret, tmp);
+ }
+ 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;
+ }
+ tmp = EC_GROUP_get_asn1_flag(ret);
+ tmp = (tmp & ~0x03) | OPENSSL_EC_EXPLICIT;
+ EC_GROUP_set_asn1_flag(ret, tmp);
+ }
+ else if (params->type == 2)
+ { /* implicitlyCA */
+ return NULL;
+ }
+ else
+ {
+ ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
+ return NULL;
+ }
+
+ return ret;
+}
+
+/* EC_GROUP <-> DER encoding of EC[PK]PARAMETERS */
+
+EC_GROUP *d2i_ECParameters(EC_GROUP **a, const unsigned char **in, long len)
+ {
+ EC_GROUP *group = NULL;
+ ECPARAMETERS *params = NULL;
+
+ if ((params = d2i_ECPARAMETERS(NULL, in, len)) == NULL)
+ {
+ ECerr(EC_F_D2I_ECPARAMETERS, EC_R_D2I_ECPARAMETERS_FAILURE);
+ ECPARAMETERS_free(params);
+ return NULL;
+ }
+
+ if ((group = ec_asn1_parameters2group(params)) == NULL)
+ {
+ ECerr(EC_F_D2I_ECPARAMETERS, EC_R_PARAMETERS2GROUP_FAILURE);
+ return NULL;
+ }
+
+ if (a && *a)
+ EC_GROUP_clear_free(*a);
+ if (a)
+ *a = group;
+
+ ECPARAMETERS_free(params);
+ return(group);
+ }
+
+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_ECParameters(const EC_GROUP *a, unsigned char **out)
+ {
+ int ret=0;
+ ECPARAMETERS *tmp = ec_asn1_group2parameters(a, NULL);
+ if (tmp == NULL)
+ {
+ ECerr(EC_F_I2D_ECPARAMETERS, EC_R_GROUP2PARAMETERS_FAILURE);
+ return 0;
+ }
+ if ((ret = i2d_ECPARAMETERS(tmp, out)) == 0)
+ {
+ ECerr(EC_F_I2D_ECPARAMETERS, EC_R_I2D_EC_PARAMETERS_FAILURE);
+ ECPARAMETERS_free(tmp);
+ return 0;
+ }
+ ECPARAMETERS_free(tmp);
+ return(ret);
+ }
+
+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);
+ }
projects / oweals / openssl.git / commitdiff