| /* 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; |
| } |
| |
| #ifndef OPENSSL_NO_EC2M |
| int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k) |
| { |
| if (group == NULL) |
| return 0; |
| |
| if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != |
| NID_X9_62_characteristic_two_field |
| || !((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_METHOD_get_field_type(EC_GROUP_method_of(group)) != |
| NID_X9_62_characteristic_two_field |
| || !((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; |
| } |
| #endif |
| |
| /* 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 */ |
| #ifdef OPENSSL_NO_EC2M |
| { |
| ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED); |
| goto err; |
| } |
| #else |
| { |
| 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; |
| } |
| } |
| } |
| #endif |
| |
| 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; |
| } |
| } |
| #ifndef OPENSSL_NO_EC2M |
| 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; |
| } |
| } |
| #endif |
| 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) |
| #ifdef OPENSSL_NO_EC2M |
| { |
| ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_GF2M_NOT_SUPPORTED); |
| goto err; |
| } |
| #else |
| { |
| 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); |
| } |
| #endif |
| 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); |
| ECPKPARAMETERS_free(params); |
| 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 = d2i_EC_PRIVATEKEY(NULL, in, len)) == NULL) { |
| ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); |
| return NULL; |
| } |
| |
| if (a == NULL || *a == NULL) { |
| if ((ret = EC_KEY_new()) == NULL) { |
| ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } 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 (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 (priv_key->publicKey) { |
| const unsigned char *pub_oct; |
| int pub_oct_len; |
| |
| pub_oct = M_ASN1_STRING_data(priv_key->publicKey); |
| pub_oct_len = M_ASN1_STRING_length(priv_key->publicKey); |
| /* |
| * The first byte - point conversion form - must be present. |
| */ |
| if (pub_oct_len <= 0) { |
| ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_BUFFER_TOO_SMALL); |
| goto err; |
| } |
| /* 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, (size_t)(pub_oct_len), NULL)) { |
| ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); |
| goto err; |
| } |
| } else { |
| if (!EC_POINT_mul |
| (ret->group, ret->pub_key, ret->priv_key, NULL, NULL, NULL)) { |
| ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); |
| goto err; |
| } |
| /* Remember the original private-key-only encoding. */ |
| ret->enc_flag |= EC_PKEY_NO_PUBKEY; |
| } |
| |
| if (a) |
| *a = ret; |
| ok = 1; |
| err: |
| if (!ok) { |
| if (ret && (a == NULL || *a != 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 || |
| (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_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; |
| } |
| } else |
| ret = *a; |
| |
| if (!d2i_ECPKParameters(&ret->group, in, len)) { |
| ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB); |
| if (a == NULL || *a != ret) |
| EC_KEY_free(ret); |
| return NULL; |
| } |
| |
| if (a) |
| *a = ret; |
| |
| 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); |
| if (new_buffer) { |
| OPENSSL_free(*out); |
| *out = NULL; |
| } |
| return 0; |
| } |
| if (!new_buffer) |
| *out += buf_len; |
| return buf_len; |
| } |
