diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/ec/ec_asn1.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/ec/ec_asn1.c | 1237 |
1 files changed, 1237 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/ec/ec_asn1.c b/openssl-1.1.0h/crypto/ec/ec_asn1.c new file mode 100644 index 0000000..271178f --- /dev/null +++ b/openssl-1.1.0h/crypto/ec/ec_asn1.c @@ -0,0 +1,1237 @@ +/* + * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (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 + */ + +#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; + + 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; + + /* Find the last non-zero element of group->poly[] */ + for (i = 0; + i < (int)OSSL_NELEM(group->poly) && group->poly[i] != 0; + i++) + continue; + + 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; + +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) +} 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_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG), + 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_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) +} static_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 *); + +/* 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_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 if (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 == NULL) { + 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 == NULL) { + 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 == NULL) { + ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); + goto err; + } + } + } +#endif + else { + ECerr(EC_F_EC_ASN1_GROUP2FIELDID, 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, 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 (!ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) || + !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 { + ASN1_BIT_STRING_free(curve->seed); + curve->seed = NULL; + } + + ok = 1; + + err: + OPENSSL_free(buffer_1); + OPENSSL_free(buffer_2); + 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; + + if (params == NULL) { + if ((ret = ECPARAMETERS_new()) == NULL) { + ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, 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)) { + ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); + goto err; + } + + /* set the curve */ + if (!ec_asn1_group2curve(group, ret->curve)) { + ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); + goto err; + } + + /* set the base point */ + if ((point = EC_GROUP_get0_generator(group)) == NULL) { + ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, 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) { + ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); + goto err; + } + if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) { + OPENSSL_free(buffer); + ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, 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) { + ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); + goto err; + } + ret->order = BN_to_ASN1_INTEGER(tmp, ret->order); + if (ret->order == NULL) { + ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, 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, ret->cofactor); + if (ret->cofactor == NULL) { + ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, 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) { + ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS, ERR_R_MALLOC_FAILURE); + return NULL; + } + } else { + if (ret->type == 0) + 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 know the nid => ERROR */ + ok = 0; + } else { + /* use the ECPARAMETERS structure */ + ret->type = 1; + 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; + 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_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE); + goto err; + } + + if ((p = BN_new()) == NULL) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, + 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_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, + 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_GROUP_NEW_FROM_ECPARAMETERS, EC_R_NOT_IMPLEMENTED); + goto err; + } else { /* error */ + + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); + goto err; + } + p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL); + if (p == NULL) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB); + goto err; + } + + if (BN_is_negative(p) || BN_is_zero(p)) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD); + goto err; + } + + field_bits = BN_num_bits(p); + if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD); + goto err; + } + + if (ret == NULL) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, 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) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB); + goto err; + } + + /* extract the order */ + if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB); + goto err; + } + if (BN_is_negative(a) || BN_is_zero(a)) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER); + goto err; + } + if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */ + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, 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) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, 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_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB); + goto err; + } + + ok = 1; + + err: + if (!ok) { + EC_GROUP_clear_free(ret); + ret = NULL; + } + + BN_free(p); + BN_free(a); + BN_free(b); + EC_POINT_free(point); + return (ret); +} + +EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params) +{ + EC_GROUP *ret = NULL; + int tmp = 0; + + if (params == NULL) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, 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_GROUP_NEW_FROM_ECPKPARAMETERS, + 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_GROUP_new_from_ecparameters(params->value.parameters); + if (!ret) { + ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, 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_GROUP_NEW_FROM_ECPKPARAMETERS, 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) { + ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE); + ECPKPARAMETERS_free(params); + return NULL; + } + + if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) { + ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE); + ECPKPARAMETERS_free(params); + return NULL; + } + + if (a) { + EC_GROUP_clear_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) { + 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) +{ + EC_KEY *ret = NULL; + EC_PRIVATEKEY *priv_key = NULL; + const unsigned char *p = *in; + + if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, 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) { + EC_GROUP_clear_free(ret->group); + ret->group = EC_GROUP_new_from_ecpkparameters(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) { + 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 { + ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY); + goto err; + } + + 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 = 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)) { + ECerr(EC_F_D2I_ECPRIVATEKEY, 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; + return (ret); + + err: + if (a == NULL || *a != ret) + EC_KEY_free(ret); + EC_PRIVATEKEY_free(priv_key); + return NULL; +} + +int i2d_ECPrivateKey(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)) { + 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; + + privlen = EC_KEY_priv2buf(a, &priv); + + if (privlen == 0) { + ECerr(EC_F_I2D_ECPRIVATEKEY, 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) { + ECerr(EC_F_I2D_ECPRIVATEKEY, 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) { + ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); + goto err; + } + + publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL); + + if (publen == 0) { + 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; + ASN1_STRING_set0(priv_key->publicKey, pub, publen); + pub = NULL; + } + + if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) { + ECerr(EC_F_I2D_ECPRIVATEKEY, 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(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-structure is necessary to set the public key + */ + ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + ret = *a; + if (!EC_KEY_oct2key(ret, *in, len, NULL)) { + ECerr(EC_F_O2I_ECPUBLICKEY, 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) { + 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; +} + +ASN1_SEQUENCE(ECDSA_SIG) = { + ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM), + ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM) +} static_ASN1_SEQUENCE_END(ECDSA_SIG) + +DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG) +DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG) +IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSA_SIG, ECDSA_SIG, ECDSA_SIG) + +ECDSA_SIG *ECDSA_SIG_new(void) +{ + ECDSA_SIG *sig = OPENSSL_zalloc(sizeof(*sig)); + if (sig == NULL) + ECerr(EC_F_ECDSA_SIG_NEW, 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); +} + +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; +} + +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 *r) +{ + int ret, i; + ASN1_INTEGER bs; + unsigned char buf[4]; + const EC_GROUP *group; + + if (r == NULL) + return 0; + group = EC_KEY_get0_group(r); + if (group == NULL) + return 0; + + i = EC_GROUP_order_bits(group); + if (i == 0) + return 0; + bs.length = (i + 7) / 8; + bs.data = buf; + bs.type = V_ASN1_INTEGER; + /* If the top bit is set the asn1 encoding is 1 larger. */ + buf[0] = 0xff; + + i = i2d_ASN1_INTEGER(&bs, NULL); + i += i; /* r and s */ + ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE); + return (ret); +} |