/* 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 "ec_lcl.h" #include #include #include #include /* 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; typedef 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 */; /* SEC1 ECPrivateKey */ typedef struct ec_privatekey_st { int version; ASN1_OCTET_STRING *privateKey; ECPKPARAMETERS *parameters; ASN1_BIT_STRING *publicKey; } EC_PRIVATEKEY; /* 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) DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPARAMETERS, 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) 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 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 *); EC_GROUP *EC_ASN1_pkparameters2group(const ECPKPARAMETERS *); ECPKPARAMETERS *EC_ASN1_group2pkparameters(const EC_GROUP *, ECPKPARAMETERS *); 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; 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; } 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 */ 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); } if (EC_GROUP_get_asn1_flag(group)) { /* 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 { /* 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; 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; } /* set the point conversion form */ EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t) (params->base->data[0] & ~0x01)); 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; } 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_PARAMETERS2GROUP, 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) { 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; } if (!EC_POINT_oct2point(ret->group, ret->pub_key, M_ASN1_STRING_data(priv_key->publicKey), M_ASN1_STRING_length(priv_key->publicKey), 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) buffer = OPENSSL_realloc(buffer, tmp_len); if (buffer == NULL) { ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); goto err; } 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; } 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_GROUP *group; EC_KEY *ret; if (in == NULL || *in == NULL) { ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); return NULL; } group = d2i_ECPKParameters(NULL, in, len); if (group == NULL) { ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB); 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 (ret->group) EC_GROUP_clear_free(ret->group); ret->group = group; return ret; } EC_KEY *ECPublicKey_set_octet_string(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_ECPUBLICKEY_SET_OCTET, 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_ECPUBLICKEY_SET_OCTET, ERR_R_MALLOC_FAILURE); return 0; } if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL)) { ECerr(EC_F_ECPUBLICKEY_SET_OCTET, ERR_R_EC_LIB); return 0; } /* save the point conversion form */ ret->conv_form = (point_conversion_form_t)(*in[0] & ~0x01); return ret; } int ECPublicKey_get_octet_string(EC_KEY *a, unsigned char **out) { size_t buf_len=0; if (a == NULL) { ECerr(EC_F_ECPUBLICKEY_GET_OCTET, 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_ECPUBLICKEY_GET_OCTET, ERR_R_MALLOC_FAILURE); return 0; } if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form, *out, buf_len, NULL)) { ECerr(EC_F_ECPUBLICKEY_GET_OCTET, ERR_R_EC_LIB); OPENSSL_free(*out); *out = NULL; return 0; } return buf_len; }