/* * rpc_pkcs1.c * ----------- * PKCS #1 (RSA) support code layered on top of RPC hash API. * * Copyright (c) 2016, NORDUnet A/S All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * - 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. * * - Neither the name of the NORDUnet nor the names of its contributors may * be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS 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 COPYRIGHT * HOLDER OR 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. */ #include #include "hal.h" #include "hal_internal.h" /* * Construct a PKCS #1 DigestInfo object. This requires some (very * basic) ASN.1 encoding, which we perform inline. */ hal_error_t hal_rpc_pkcs1_construct_digestinfo(const hal_hash_handle_t handle, uint8_t *digest_info, size_t *digest_info_len, const size_t digest_info_max) { assert(digest_info != NULL && digest_info_len != NULL); hal_digest_algorithm_t alg; size_t len, alg_len; hal_error_t err; if ((err = hal_rpc_hash_get_algorithm(handle, &alg)) != HAL_OK || (err = hal_rpc_hash_get_digest_length(alg, &len)) != HAL_OK || (err = hal_rpc_hash_get_digest_algorithm_id(alg, NULL, &alg_len, 0)) != HAL_OK) return err; *digest_info_len = len + alg_len + 4; if (*digest_info_len >= digest_info_max) return HAL_ERROR_RESULT_TOO_LONG; assert(*digest_info_len < 130); uint8_t *d = digest_info; *d++ = 0x30; /* SEQUENCE */ *d++ = (uint8_t) (*digest_info_len - 2); if ((err = hal_rpc_hash_get_digest_algorithm_id(alg, d, NULL, alg_len)) != HAL_OK) return err; d += alg_len; *d++ = 0x04; /* OCTET STRING */ *d++ = (uint8_t) len; assert(digest_info + *digest_info_len == d + len); return hal_rpc_hash_finalize(handle, d, len); } 6dd46c125fc0277fa0ce2d3d7660147'>Makefile

blob: ce36d4c8a9fc5ec743201a41d68000070922cdd1 (plain) (blame)