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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Permission is hereby granted, free of charge, to any person
      5  * obtaining a copy of this software and associated documentation
      6  * files (the "Software"), to deal in the Software without
      7  * restriction, including without limitation the rights to use, copy,
      8  * modify, merge, publish, distribute, sublicense, and/or sell copies
      9  * of the Software, and to permit persons to whom the Software is
     10  * furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice shall be
     13  * included in all copies or substantial portions of the Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     22  * SOFTWARE.
     23  */
     24 
     25 /* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
     26  * Use of this source code is governed by a BSD-style license that can be
     27  * found in the LICENSE file.
     28  */
     29 
     30 #ifdef AVB_INSIDE_LIBAVB_H
     31 #error "You can't include avb_rsa.h in the public header libavb.h."
     32 #endif
     33 
     34 #ifndef AVB_COMPILATION
     35 #error "Never include this file, it may only be used from internal avb code."
     36 #endif
     37 
     38 #ifndef AVB_RSA_H_
     39 #define AVB_RSA_H_
     40 
     41 #ifdef __cplusplus
     42 extern "C" {
     43 #endif
     44 
     45 #include "avb_crypto.h"
     46 #include "avb_sysdeps.h"
     47 
     48 /* Using the key given by |key|, verify a RSA signature |sig| of
     49  * length |sig_num_bytes| against an expected |hash| of length
     50  * |hash_num_bytes|. The padding to expect must be passed in using
     51  * |padding| of length |padding_num_bytes|.
     52  *
     53  * The data in |key| must match the format defined in
     54  * |AvbRSAPublicKeyHeader|, including the two large numbers
     55  * following. The |key_num_bytes| must be the size of the entire
     56  * serialized key.
     57  *
     58  * Returns false if verification fails, true otherwise.
     59  */
     60 bool avb_rsa_verify(const uint8_t* key,
     61                     size_t key_num_bytes,
     62                     const uint8_t* sig,
     63                     size_t sig_num_bytes,
     64                     const uint8_t* hash,
     65                     size_t hash_num_bytes,
     66                     const uint8_t* padding,
     67                     size_t padding_num_bytes) AVB_ATTR_WARN_UNUSED_RESULT;
     68 
     69 #ifdef __cplusplus
     70 }
     71 #endif
     72 
     73 #endif /* AVB_RSA_H_ */
     74