| /* |
| * Copyright 2002-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| /* |
| * ECDSA low level APIs are deprecated for public use, but still ok for |
| * internal use. |
| */ |
| #include "internal/deprecated.h" |
| |
| #include <string.h> |
| #include "ec_local.h" |
| #include <openssl/err.h> |
| #include <openssl/asn1t.h> |
| #include <openssl/objects.h> |
| #include "internal/nelem.h" |
| #include "crypto/asn1_dsa.h" |
| |
| #ifndef FIPS_MODULE |
| |
| /* some structures needed for the asn1 encoding */ |
| typedef struct x9_62_pentanomial_st { |
| int32_t k1; |
| int32_t k2; |
| int32_t k3; |
| } X9_62_PENTANOMIAL; |
| |
| typedef struct x9_62_characteristic_two_st { |
| int32_t 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; |
| |
| struct ec_parameters_st { |
| int32_t version; |
| X9_62_FIELDID *fieldID; |
| X9_62_CURVE *curve; |
| ASN1_OCTET_STRING *base; |
| ASN1_INTEGER *order; |
| ASN1_INTEGER *cofactor; |
| } /* ECPARAMETERS */ ; |
| |
| typedef enum { |
| ECPKPARAMETERS_TYPE_NAMED = 0, |
| ECPKPARAMETERS_TYPE_EXPLICIT, |
| ECPKPARAMETERS_TYPE_IMPLICIT |
| } ecpk_parameters_type_t; |
| |
| 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 { |
| int32_t version; |
| ASN1_OCTET_STRING *privateKey; |
| ECPKPARAMETERS *parameters; |
| ASN1_BIT_STRING *publicKey; |
| } EC_PRIVATEKEY; |
| |
| /* the OpenSSL ASN.1 definitions */ |
| ASN1_SEQUENCE(X9_62_PENTANOMIAL) = { |
| ASN1_EMBED(X9_62_PENTANOMIAL, k1, INT32), |
| ASN1_EMBED(X9_62_PENTANOMIAL, k2, INT32), |
| ASN1_EMBED(X9_62_PENTANOMIAL, k3, INT32) |
| } static_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_EMBED(X9_62_CHARACTERISTIC_TWO, m, INT32), |
| ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT), |
| ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO) |
| } static_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) |
| } static_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) |
| } static_ASN1_SEQUENCE_END(X9_62_CURVE) |
| |
| ASN1_SEQUENCE(ECPARAMETERS) = { |
| ASN1_EMBED(ECPARAMETERS, version, INT32), |
| 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(ECPKPARAMETERS) |
| DECLARE_ASN1_ENCODE_FUNCTIONS_name(ECPKPARAMETERS, ECPKPARAMETERS) |
| IMPLEMENT_ASN1_FUNCTIONS(ECPKPARAMETERS) |
| |
| ASN1_SEQUENCE(EC_PRIVATEKEY) = { |
| ASN1_EMBED(EC_PRIVATEKEY, version, INT32), |
| 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) |
| } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY) |
| |
| DECLARE_ASN1_FUNCTIONS(EC_PRIVATEKEY) |
| DECLARE_ASN1_ENCODE_FUNCTIONS_name(EC_PRIVATEKEY, EC_PRIVATEKEY) |
| IMPLEMENT_ASN1_FUNCTIONS(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 *); |
| |
| /* 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) */ |
| ASN1_OBJECT_free(field->fieldType); |
| ASN1_TYPE_free(field->p.other); |
| |
| nid = EC_GROUP_get_field_type(group); |
| /* set OID for the field */ |
| if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_OBJ_LIB); |
| goto err; |
| } |
| |
| if (nid == NID_X9_62_prime_field) { |
| if ((tmp = BN_new()) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| /* the parameters are specified by the prime number p */ |
| if (!EC_GROUP_get_curve(group, tmp, NULL, NULL, NULL)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| /* set the prime number */ |
| field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL); |
| if (field->p.prime == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
| goto err; |
| } |
| } else if (nid == NID_X9_62_characteristic_two_field) |
| #ifdef OPENSSL_NO_EC2M |
| { |
| ERR_raise(ERR_LIB_EC, 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) { |
| ERR_raise(ERR_LIB_EC, 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) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| /* set base type OID */ |
| if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) { |
| ERR_raise(ERR_LIB_EC, 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 == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) { |
| ERR_raise(ERR_LIB_EC, 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 == NULL) { |
| ERR_raise(ERR_LIB_EC, 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 == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } |
| } |
| #endif |
| else { |
| ERR_raise(ERR_LIB_EC, EC_R_UNSUPPORTED_FIELD); |
| goto err; |
| } |
| |
| ok = 1; |
| |
| err: |
| BN_free(tmp); |
| return ok; |
| } |
| |
| static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve) |
| { |
| int ok = 0; |
| BIGNUM *tmp_1 = NULL, *tmp_2 = NULL; |
| unsigned char *a_buf = NULL, *b_buf = NULL; |
| size_t len; |
| |
| if (!group || !curve || !curve->a || !curve->b) |
| return 0; |
| |
| if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| /* get a and b */ |
| if (!EC_GROUP_get_curve(group, NULL, tmp_1, tmp_2, NULL)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| |
| /* |
| * Per SEC 1, the curve coefficients must be padded up to size. See C.2's |
| * definition of Curve, C.1's definition of FieldElement, and 2.3.5's |
| * definition of how to encode the field elements. |
| */ |
| len = ((size_t)EC_GROUP_get_degree(group) + 7) / 8; |
| if ((a_buf = OPENSSL_malloc(len)) == NULL |
| || (b_buf = OPENSSL_malloc(len)) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| if (BN_bn2binpad(tmp_1, a_buf, len) < 0 |
| || BN_bn2binpad(tmp_2, b_buf, len) < 0) { |
| ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); |
| goto err; |
| } |
| |
| /* set a and b */ |
| if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len) |
| || !ASN1_OCTET_STRING_set(curve->b, b_buf, len)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
| goto err; |
| } |
| |
| /* set the seed (optional) */ |
| if (group->seed) { |
| if (!curve->seed) |
| if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) { |
| ERR_raise(ERR_LIB_EC, 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)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
| goto err; |
| } |
| } else { |
| ASN1_BIT_STRING_free(curve->seed); |
| curve->seed = NULL; |
| } |
| |
| ok = 1; |
| |
| err: |
| OPENSSL_free(a_buf); |
| OPENSSL_free(b_buf); |
| BN_free(tmp_1); |
| BN_free(tmp_2); |
| return ok; |
| } |
| |
| ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group, |
| ECPARAMETERS *params) |
| { |
| size_t len = 0; |
| ECPARAMETERS *ret = NULL; |
| const BIGNUM *tmp; |
| unsigned char *buffer = NULL; |
| const EC_POINT *point = NULL; |
| point_conversion_form_t form; |
| ASN1_INTEGER *orig; |
| |
| if (params == NULL) { |
| if ((ret = ECPARAMETERS_new()) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } else |
| ret = params; |
| |
| /* set the version (always one) */ |
| ret->version = (long)0x1; |
| |
| /* set the fieldID */ |
| if (!ec_asn1_group2fieldid(group, ret->fieldID)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| |
| /* set the curve */ |
| if (!ec_asn1_group2curve(group, ret->curve)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| |
| /* set the base point */ |
| if ((point = EC_GROUP_get0_generator(group)) == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_UNDEFINED_GENERATOR); |
| goto err; |
| } |
| |
| form = EC_GROUP_get_point_conversion_form(group); |
| |
| len = EC_POINT_point2buf(group, point, form, &buffer, NULL); |
| if (len == 0) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) { |
| OPENSSL_free(buffer); |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| ASN1_STRING_set0(ret->base, buffer, len); |
| |
| /* set the order */ |
| tmp = EC_GROUP_get0_order(group); |
| if (tmp == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| ret->order = BN_to_ASN1_INTEGER(tmp, orig = ret->order); |
| if (ret->order == NULL) { |
| ret->order = orig; |
| ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
| goto err; |
| } |
| |
| /* set the cofactor (optional) */ |
| tmp = EC_GROUP_get0_cofactor(group); |
| if (tmp != NULL) { |
| ret->cofactor = BN_to_ASN1_INTEGER(tmp, orig = ret->cofactor); |
| if (ret->cofactor == NULL) { |
| ret->cofactor = orig; |
| ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
| goto err; |
| } |
| } |
| |
| return ret; |
| |
| err: |
| if (params == NULL) |
| ECPARAMETERS_free(ret); |
| return NULL; |
| } |
| |
| ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group, |
| ECPKPARAMETERS *params) |
| { |
| int ok = 1, tmp; |
| ECPKPARAMETERS *ret = params; |
| |
| if (ret == NULL) { |
| if ((ret = ECPKPARAMETERS_new()) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| } |
| } else { |
| if (ret->type == ECPKPARAMETERS_TYPE_NAMED) |
| ASN1_OBJECT_free(ret->value.named_curve); |
| else if (ret->type == ECPKPARAMETERS_TYPE_EXPLICIT |
| && ret->value.parameters != NULL) |
| ECPARAMETERS_free(ret->value.parameters); |
| } |
| |
| if (EC_GROUP_get_asn1_flag(group) == OPENSSL_EC_NAMED_CURVE) { |
| /* |
| * use the asn1 OID to describe the elliptic curve parameters |
| */ |
| tmp = EC_GROUP_get_curve_name(group); |
| if (tmp) { |
| ASN1_OBJECT *asn1obj = OBJ_nid2obj(tmp); |
| |
| if (asn1obj == NULL || OBJ_length(asn1obj) == 0) { |
| ASN1_OBJECT_free(asn1obj); |
| ERR_raise(ERR_LIB_EC, EC_R_MISSING_OID); |
| ok = 0; |
| } else { |
| ret->type = ECPKPARAMETERS_TYPE_NAMED; |
| ret->value.named_curve = asn1obj; |
| } |
| } else |
| /* we don't know the nid => ERROR */ |
| ok = 0; |
| } else { |
| /* use the ECPARAMETERS structure */ |
| ret->type = ECPKPARAMETERS_TYPE_EXPLICIT; |
| if ((ret->value.parameters = |
| EC_GROUP_get_ecparameters(group, NULL)) == NULL) |
| ok = 0; |
| } |
| |
| if (!ok) { |
| ECPKPARAMETERS_free(ret); |
| return NULL; |
| } |
| return ret; |
| } |
| |
| EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params) |
| { |
| int ok = 0, tmp; |
| EC_GROUP *ret = NULL, *dup = NULL; |
| BIGNUM *p = NULL, *a = NULL, *b = NULL; |
| EC_POINT *point = NULL; |
| long field_bits; |
| int curve_name = NID_undef; |
| BN_CTX *ctx = NULL; |
| |
| if (params->fieldID == NULL |
| || params->fieldID->fieldType == NULL |
| || params->fieldID->p.ptr == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
| goto err; |
| } |
| |
| /* |
| * Now extract the curve parameters a and b. Note that, although SEC 1 |
| * specifies the length of their encodings, historical versions of OpenSSL |
| * encoded them incorrectly, so we must accept any length for backwards |
| * compatibility. |
| */ |
| if (params->curve == NULL |
| || params->curve->a == NULL || params->curve->a->data == NULL |
| || params->curve->b == NULL || params->curve->b->data == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
| goto err; |
| } |
| a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL); |
| if (a == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); |
| goto err; |
| } |
| b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL); |
| if (b == NULL) { |
| ERR_raise(ERR_LIB_EC, 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 |
| { |
| ERR_raise(ERR_LIB_EC, 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) { |
| ERR_raise(ERR_LIB_EC, EC_R_FIELD_TOO_LARGE); |
| goto err; |
| } |
| |
| if ((p = BN_new()) == NULL) { |
| ERR_raise(ERR_LIB_EC, 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) { |
| ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
| goto err; |
| } |
| |
| tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis); |
| |
| if (!(char_two->m > tmp_long && tmp_long > 0)) { |
| ERR_raise(ERR_LIB_EC, 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 == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
| goto err; |
| } |
| |
| if (! |
| (char_two->m > penta->k3 && penta->k3 > penta->k2 |
| && penta->k2 > penta->k1 && penta->k1 > 0)) { |
| ERR_raise(ERR_LIB_EC, 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) { |
| ERR_raise(ERR_LIB_EC, EC_R_NOT_IMPLEMENTED); |
| goto err; |
| } else { /* error */ |
| |
| ERR_raise(ERR_LIB_EC, 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 == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
| goto err; |
| } |
| p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL); |
| if (p == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
| goto err; |
| } |
| |
| if (BN_is_negative(p) || BN_is_zero(p)) { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_FIELD); |
| goto err; |
| } |
| |
| field_bits = BN_num_bits(p); |
| if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { |
| ERR_raise(ERR_LIB_EC, EC_R_FIELD_TOO_LARGE); |
| goto err; |
| } |
| |
| /* create the EC_GROUP structure */ |
| ret = EC_GROUP_new_curve_GFp(p, a, b, NULL); |
| } else { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_FIELD); |
| goto err; |
| } |
| |
| if (ret == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| |
| /* extract seed (optional) */ |
| if (params->curve->seed != NULL) { |
| OPENSSL_free(ret->seed); |
| if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) { |
| ERR_raise(ERR_LIB_EC, 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 == NULL |
| || params->base == NULL |
| || params->base->data == NULL |
| || params->base->length == 0) { |
| ERR_raise(ERR_LIB_EC, 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)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| |
| /* extract the order */ |
| if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
| goto err; |
| } |
| if (BN_is_negative(a) || BN_is_zero(a)) { |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_GROUP_ORDER); |
| goto err; |
| } |
| if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */ |
| ERR_raise(ERR_LIB_EC, EC_R_INVALID_GROUP_ORDER); |
| goto err; |
| } |
| |
| /* extract the cofactor (optional) */ |
| if (params->cofactor == NULL) { |
| BN_free(b); |
| b = NULL; |
| } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
| goto err; |
| } |
| /* set the generator, order and cofactor (if present) */ |
| if (!EC_GROUP_set_generator(ret, point, a, b)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| |
| /* |
| * Check if the explicit parameters group just created matches one of the |
| * built-in curves. |
| * |
| * We create a copy of the group just built, so that we can remove optional |
| * fields for the lookup: we do this to avoid the possibility that one of |
| * the optional parameters is used to force the library into using a less |
| * performant and less secure EC_METHOD instead of the specialized one. |
| * In any case, `seed` is not really used in any computation, while a |
| * cofactor different from the one in the built-in table is just |
| * mathematically wrong anyway and should not be used. |
| */ |
| if ((ctx = BN_CTX_new()) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); |
| goto err; |
| } |
| if ((dup = EC_GROUP_dup(ret)) == NULL |
| || EC_GROUP_set_seed(dup, NULL, 0) != 1 |
| || !EC_GROUP_set_generator(dup, point, a, NULL)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| if ((curve_name = ossl_ec_curve_nid_from_params(dup, ctx)) != NID_undef) { |
| /* |
| * The input explicit parameters successfully matched one of the |
| * built-in curves: often for built-in curves we have specialized |
| * methods with better performance and hardening. |
| * |
| * In this case we replace the `EC_GROUP` created through explicit |
| * parameters with one created from a named group. |
| */ |
| EC_GROUP *named_group = NULL; |
| |
| #ifndef OPENSSL_NO_EC_NISTP_64_GCC_128 |
| /* |
| * NID_wap_wsg_idm_ecid_wtls12 and NID_secp224r1 are both aliases for |
| * the same curve, we prefer the SECP nid when matching explicit |
| * parameters as that is associated with a specialized EC_METHOD. |
| */ |
| if (curve_name == NID_wap_wsg_idm_ecid_wtls12) |
| curve_name = NID_secp224r1; |
| #endif /* !def(OPENSSL_NO_EC_NISTP_64_GCC_128) */ |
| |
| if ((named_group = EC_GROUP_new_by_curve_name(curve_name)) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| EC_GROUP_free(ret); |
| ret = named_group; |
| |
| /* |
| * Set the flag so that EC_GROUPs created from explicit parameters are |
| * serialized using explicit parameters by default. |
| */ |
| EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_EXPLICIT_CURVE); |
| |
| /* |
| * If the input params do not contain the optional seed field we make |
| * sure it is not added to the returned group. |
| * |
| * The seed field is not really used inside libcrypto anyway, and |
| * adding it to parsed explicit parameter keys would alter their DER |
| * encoding output (because of the extra field) which could impact |
| * applications fingerprinting keys by their DER encoding. |
| */ |
| if (params->curve->seed == NULL) { |
| if (EC_GROUP_set_seed(ret, NULL, 0) != 1) |
| goto err; |
| } |
| } |
| |
| ok = 1; |
| |
| err: |
| if (!ok) { |
| EC_GROUP_free(ret); |
| ret = NULL; |
| } |
| EC_GROUP_free(dup); |
| |
| BN_free(p); |
| BN_free(a); |
| BN_free(b); |
| EC_POINT_free(point); |
| |
| BN_CTX_free(ctx); |
| |
| return ret; |
| } |
| |
| EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params) |
| { |
| EC_GROUP *ret = NULL; |
| int tmp = 0; |
| |
| if (params == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_MISSING_PARAMETERS); |
| return NULL; |
| } |
| |
| if (params->type == ECPKPARAMETERS_TYPE_NAMED) { |
| /* the curve is given by an OID */ |
| tmp = OBJ_obj2nid(params->value.named_curve); |
| if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_EC_GROUP_NEW_BY_NAME_FAILURE); |
| return NULL; |
| } |
| EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE); |
| } else if (params->type == ECPKPARAMETERS_TYPE_EXPLICIT) { |
| /* the parameters are given by an ECPARAMETERS structure */ |
| ret = EC_GROUP_new_from_ecparameters(params->value.parameters); |
| if (!ret) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| return NULL; |
| } |
| EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_EXPLICIT_CURVE); |
| } else if (params->type == ECPKPARAMETERS_TYPE_IMPLICIT) { |
| /* implicit parameters inherited from CA - unsupported */ |
| return NULL; |
| } else { |
| ERR_raise(ERR_LIB_EC, 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; |
| const unsigned char *p = *in; |
| |
| if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) { |
| ECPKPARAMETERS_free(params); |
| return NULL; |
| } |
| |
| if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) { |
| ECPKPARAMETERS_free(params); |
| return NULL; |
| } |
| |
| if (params->type == ECPKPARAMETERS_TYPE_EXPLICIT) |
| group->decoded_from_explicit_params = 1; |
| |
| if (a) { |
| EC_GROUP_free(*a); |
| *a = group; |
| } |
| |
| ECPKPARAMETERS_free(params); |
| *in = p; |
| return group; |
| } |
| |
| int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out) |
| { |
| int ret = 0; |
| ECPKPARAMETERS *tmp = EC_GROUP_get_ecpkparameters(a, NULL); |
| if (tmp == NULL) { |
| ERR_raise(ERR_LIB_EC, EC_R_GROUP2PKPARAMETERS_FAILURE); |
| return 0; |
| } |
| if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) { |
| ERR_raise(ERR_LIB_EC, 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) |
| { |
| EC_KEY *ret = NULL; |
| EC_PRIVATEKEY *priv_key = NULL; |
| const unsigned char *p = *in; |
| |
| if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) |
| return NULL; |
| |
| if (a == NULL || *a == NULL) { |
| if ((ret = EC_KEY_new()) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } else |
| ret = *a; |
| |
| if (priv_key->parameters) { |
| EC_GROUP_free(ret->group); |
| ret->group = EC_GROUP_new_from_ecpkparameters(priv_key->parameters); |
| if (ret->group != NULL |
| && priv_key->parameters->type == ECPKPARAMETERS_TYPE_EXPLICIT) |
| ret->group->decoded_from_explicit_params = 1; |
| } |
| |
| if (ret->group == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| |
| ret->version = priv_key->version; |
| |
| if (priv_key->privateKey) { |
| ASN1_OCTET_STRING *pkey = priv_key->privateKey; |
| if (EC_KEY_oct2priv(ret, ASN1_STRING_get0_data(pkey), |
| ASN1_STRING_length(pkey)) == 0) |
| goto err; |
| } else { |
| ERR_raise(ERR_LIB_EC, EC_R_MISSING_PRIVATE_KEY); |
| goto err; |
| } |
| |
| if (EC_GROUP_get_curve_name(ret->group) == NID_sm2) |
| EC_KEY_set_flags(ret, EC_FLAG_SM2_RANGE); |
| |
| EC_POINT_clear_free(ret->pub_key); |
| ret->pub_key = EC_POINT_new(ret->group); |
| if (ret->pub_key == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| |
| if (priv_key->publicKey) { |
| const unsigned char *pub_oct; |
| int pub_oct_len; |
| |
| pub_oct = ASN1_STRING_get0_data(priv_key->publicKey); |
| pub_oct_len = ASN1_STRING_length(priv_key->publicKey); |
| if (!EC_KEY_oct2key(ret, pub_oct, pub_oct_len, NULL)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| } else { |
| if (ret->group->meth->keygenpub == NULL |
| || ret->group->meth->keygenpub(ret) == 0) |
| goto err; |
| /* Remember the original private-key-only encoding. */ |
| ret->enc_flag |= EC_PKEY_NO_PUBKEY; |
| } |
| |
| if (a) |
| *a = ret; |
| EC_PRIVATEKEY_free(priv_key); |
| *in = p; |
| ret->dirty_cnt++; |
| return ret; |
| |
| err: |
| if (a == NULL || *a != ret) |
| EC_KEY_free(ret); |
| EC_PRIVATEKEY_free(priv_key); |
| return NULL; |
| } |
| |
| int i2d_ECPrivateKey(const EC_KEY *a, unsigned char **out) |
| { |
| int ret = 0, ok = 0; |
| unsigned char *priv= NULL, *pub= NULL; |
| size_t privlen = 0, publen = 0; |
| |
| EC_PRIVATEKEY *priv_key = NULL; |
| |
| if (a == NULL || a->group == NULL || |
| (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER); |
| goto err; |
| } |
| |
| if ((priv_key = EC_PRIVATEKEY_new()) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| priv_key->version = a->version; |
| |
| privlen = EC_KEY_priv2buf(a, &priv); |
| |
| if (privlen == 0) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| |
| ASN1_STRING_set0(priv_key->privateKey, priv, privlen); |
| priv = NULL; |
| |
| if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) { |
| if ((priv_key->parameters = |
| EC_GROUP_get_ecpkparameters(a->group, |
| priv_key->parameters)) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| } |
| |
| if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) { |
| priv_key->publicKey = ASN1_BIT_STRING_new(); |
| if (priv_key->publicKey == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL); |
| |
| if (publen == 0) { |
| ERR_raise(ERR_LIB_EC, 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; |
| ASN1_STRING_set0(priv_key->publicKey, pub, publen); |
| pub = NULL; |
| } |
| |
| if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| goto err; |
| } |
| ok = 1; |
| err: |
| OPENSSL_clear_free(priv, privlen); |
| OPENSSL_free(pub); |
| EC_PRIVATEKEY_free(priv_key); |
| return (ok ? ret : 0); |
| } |
| |
| int i2d_ECParameters(const EC_KEY *a, unsigned char **out) |
| { |
| if (a == NULL) { |
| ERR_raise(ERR_LIB_EC, 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) { |
| ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER); |
| return NULL; |
| } |
| |
| if (a == NULL || *a == NULL) { |
| if ((ret = EC_KEY_new()) == NULL) { |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| } |
| } else |
| ret = *a; |
| |
| if (!d2i_ECPKParameters(&ret->group, in, len)) { |
| if (a == NULL || *a != ret) |
| EC_KEY_free(ret); |
| else |
| ret->dirty_cnt++; |
| return NULL; |
| } |
| |
| if (EC_GROUP_get_curve_name(ret->group) == NID_sm2) |
| EC_KEY_set_flags(ret, EC_FLAG_SM2_RANGE); |
| |
| ret->dirty_cnt++; |
| |
| 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-structure is necessary to set the public key |
| */ |
| ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER); |
| return 0; |
| } |
| ret = *a; |
| /* EC_KEY_opt2key updates dirty_cnt */ |
| if (!EC_KEY_oct2key(ret, *in, len, NULL)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| return 0; |
| } |
| *in += len; |
| return ret; |
| } |
| |
| int i2o_ECPublicKey(const EC_KEY *a, unsigned char **out) |
| { |
| size_t buf_len = 0; |
| int new_buffer = 0; |
| |
| if (a == NULL) { |
| ERR_raise(ERR_LIB_EC, 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) { |
| ERR_raise(ERR_LIB_EC, 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)) { |
| ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
| if (new_buffer) { |
| OPENSSL_free(*out); |
| *out = NULL; |
| } |
| return 0; |
| } |
| if (!new_buffer) |
| *out += buf_len; |
| return buf_len; |
| } |
| |
| DECLARE_ASN1_FUNCTIONS(ECDSA_SIG) |
| DECLARE_ASN1_ENCODE_FUNCTIONS_name(ECDSA_SIG, ECDSA_SIG) |
| |
| #endif /* FIPS_MODULE */ |
| |
| ECDSA_SIG *ECDSA_SIG_new(void) |
| { |
| ECDSA_SIG *sig = OPENSSL_zalloc(sizeof(*sig)); |
| if (sig == NULL) |
| ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE); |
| return sig; |
| } |
| |
| void ECDSA_SIG_free(ECDSA_SIG *sig) |
| { |
| if (sig == NULL) |
| return; |
| BN_clear_free(sig->r); |
| BN_clear_free(sig->s); |
| OPENSSL_free(sig); |
| } |
| |
| ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **psig, const unsigned char **ppin, long len) |
| { |
| ECDSA_SIG *sig; |
| |
| if (len < 0) |
| return NULL; |
| if (psig != NULL && *psig != NULL) { |
| sig = *psig; |
| } else { |
| sig = ECDSA_SIG_new(); |
| if (sig == NULL) |
| return NULL; |
| } |
| if (sig->r == NULL) |
| sig->r = BN_new(); |
| if (sig->s == NULL) |
| sig->s = BN_new(); |
| if (sig->r == NULL || sig->s == NULL |
| || ossl_decode_der_dsa_sig(sig->r, sig->s, ppin, (size_t)len) == 0) { |
| if (psig == NULL || *psig == NULL) |
| ECDSA_SIG_free(sig); |
| return NULL; |
| } |
| if (psig != NULL && *psig == NULL) |
| *psig = sig; |
| return sig; |
| } |
| |
| int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **ppout) |
| { |
| BUF_MEM *buf = NULL; |
| size_t encoded_len; |
| WPACKET pkt; |
| |
| if (ppout == NULL) { |
| if (!WPACKET_init_null(&pkt, 0)) |
| return -1; |
| } else if (*ppout == NULL) { |
| if ((buf = BUF_MEM_new()) == NULL |
| || !WPACKET_init_len(&pkt, buf, 0)) { |
| BUF_MEM_free(buf); |
| return -1; |
| } |
| } else { |
| if (!WPACKET_init_static_len(&pkt, *ppout, SIZE_MAX, 0)) |
| return -1; |
| } |
| |
| if (!ossl_encode_der_dsa_sig(&pkt, sig->r, sig->s) |
| || !WPACKET_get_total_written(&pkt, &encoded_len) |
| || !WPACKET_finish(&pkt)) { |
| BUF_MEM_free(buf); |
| WPACKET_cleanup(&pkt); |
| return -1; |
| } |
| |
| if (ppout != NULL) { |
| if (*ppout == NULL) { |
| *ppout = (unsigned char *)buf->data; |
| buf->data = NULL; |
| BUF_MEM_free(buf); |
| } else { |
| *ppout += encoded_len; |
| } |
| } |
| |
| return (int)encoded_len; |
| } |
| |
| void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps) |
| { |
| if (pr != NULL) |
| *pr = sig->r; |
| if (ps != NULL) |
| *ps = sig->s; |
| } |
| |
| const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig) |
| { |
| return sig->r; |
| } |
| |
| const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig) |
| { |
| return sig->s; |
| } |
| |
| int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s) |
| { |
| if (r == NULL || s == NULL) |
| return 0; |
| BN_clear_free(sig->r); |
| BN_clear_free(sig->s); |
| sig->r = r; |
| sig->s = s; |
| return 1; |
| } |
| |
| int ECDSA_size(const EC_KEY *ec) |
| { |
| int ret; |
| ECDSA_SIG sig; |
| const EC_GROUP *group; |
| const BIGNUM *bn; |
| |
| if (ec == NULL) |
| return 0; |
| group = EC_KEY_get0_group(ec); |
| if (group == NULL) |
| return 0; |
| |
| bn = EC_GROUP_get0_order(group); |
| if (bn == NULL) |
| return 0; |
| |
| sig.r = sig.s = (BIGNUM *)bn; |
| ret = i2d_ECDSA_SIG(&sig, NULL); |
| |
| if (ret < 0) |
| ret = 0; |
| return ret; |
| } |
