/* * Copyright (C) 2015 Red Hat, Inc. * * Author: Nikos Mavrogiannopoulos * * This file is part of GnuTLS. * * The GnuTLS is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see * */ /* Functions that relate on PKCS7 attribute setting. */ #include "gnutls_int.h" #include #include #include "errors.h" #include #include #include #include /** * gnutls_pkcs7_add_attr: * @list: A list of existing attributes or pointer to %NULL for the first one * @oid: the OID of the attribute to be set * @data: the raw (DER-encoded) data of the attribute to be set * @flags: zero or %GNUTLS_PKCS7_ATTR_ENCODE_OCTET_STRING * * This function will set a PKCS #7 attribute in the provided list. * If this function fails, the previous list would be deallocated. * * Note that any attributes set with this function must either be * DER or BER encoded, unless a special flag is present. * * Returns: On success, the new list head, otherwise %NULL. * * Since: 3.4.2 **/ int gnutls_pkcs7_add_attr(gnutls_pkcs7_attrs_t *list, const char *oid, gnutls_datum_t *data, unsigned flags) { int ret; gnutls_pkcs7_attrs_st *r; r = gnutls_calloc(1, sizeof(gnutls_pkcs7_attrs_st)); if (r == NULL) goto fail; if (flags & GNUTLS_PKCS7_ATTR_ENCODE_OCTET_STRING) { ret = _gnutls_x509_encode_string(ASN1_ETYPE_OCTET_STRING, data->data, data->size, &r->data); } else { ret = _gnutls_set_datum(&r->data, data->data, data->size); } if (ret < 0) goto fail; r->oid = gnutls_strdup(oid); if (r->oid == NULL) goto fail; r->next = *list; *list = r; return 0; fail: if (r) { gnutls_free(r->data.data); gnutls_free(r); } gnutls_pkcs7_attrs_deinit(*list); return GNUTLS_E_MEMORY_ERROR; } /** * gnutls_pkcs7_get_attr: * @list: A list of existing attributes or %NULL for the first one * @idx: the index of the attribute to get * @oid: the OID of the attribute (read-only) * @data: the raw data of the attribute * @flags: zero or %GNUTLS_PKCS7_ATTR_ENCODE_OCTET_STRING * * This function will get a PKCS #7 attribute from the provided list. * The OID is a constant string, but data will be allocated and must be * deinitialized by the caller. * * Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a * negative error value. %GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned * if there are no data in the current index. * * Since: 3.4.2 **/ int gnutls_pkcs7_get_attr(gnutls_pkcs7_attrs_t list, unsigned idx, char **oid, gnutls_datum_t *data, unsigned flags) { unsigned i; gnutls_pkcs7_attrs_st *p = list; int ret; for (i=0;inext; if (p == NULL) break; } if (p == NULL) return gnutls_assert_val(GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE); *oid = p->oid; if (flags & GNUTLS_PKCS7_ATTR_ENCODE_OCTET_STRING) { ret = _gnutls_x509_decode_string(ASN1_ETYPE_OCTET_STRING, p->data.data, p->data.size, data, 1); } else { ret = _gnutls_set_datum(data, p->data.data, p->data.size); } if (ret < 0) return gnutls_assert_val(ret); return 0; } /** * gnutls_pkcs7_attrs_deinit: * @list: A list of existing attributes * * This function will clear a PKCS #7 attribute list. * * Since: 3.4.2 **/ void gnutls_pkcs7_attrs_deinit(gnutls_pkcs7_attrs_t list) { gnutls_pkcs7_attrs_st *r = list, *next; while(r) { next = r->next; gnutls_free(r->data.data); gnutls_free(r->oid); gnutls_free(r); r = next; } }