mbedtls/include/mbedtls/error.h

109 lines
3.1 KiB
C

/**
* \file error.h
*
* \brief Error to string translation
*/
/*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file is part of mbed TLS (https://tls.mbed.org)
*/
#ifndef MBEDTLS_ERROR_H
#define MBEDTLS_ERROR_H
#include <stddef.h>
/**
* Error code layout.
*
* Currently we try to keep all error codes within the negative space of 16
* bits signed integers to support all platforms (-0x0001 - -0x7FFF). In
* addition we'd like to give two layers of information on the error if
* possible.
*
* For that purpose the error codes are segmented in the following manner:
*
* 16 bit error code bit-segmentation
*
* 1 bit - Unused (sign bit)
* 3 bits - High level module ID
* 5 bits - Module-dependent error code
* 7 bits - Low level module errors
*
* For historical reasons, low-level error codes are divided in even and odd,
* even codes were assigned first, and -1 is reserved for other errors.
*
* Low-level module errors (0x0002-0x007E, 0x0003-0x007F)
*
* Module Nr Codes assigned
* MPI 7 0x0002-0x0010
* GCM 2 0x0012-0x0014
* BLOWFISH 2 0x0016-0x0018
* THREADING 3 0x001A-0x001E
* AES 2 0x0020-0x0022 0x0023-0x0023
* CAMELLIA 2 0x0024-0x0026
* XTEA 1 0x0028-0x0028
* BASE64 2 0x002A-0x002C
* OID 1 0x002E-0x002E 0x000B-0x000B
* PADLOCK 1 0x0030-0x0030
* DES 1 0x0032-0x0032
* CTR_DBRG 4 0x0034-0x003A
* ENTROPY 3 0x003C-0x0040 0x003D-0x003F
* NET 11 0x0042-0x0052 0x0043-0x0045
* ASN1 7 0x0060-0x006C
* PBKDF2 1 0x007C-0x007C
* HMAC_DRBG 4 0x0003-0x0009
* CCM 2 0x000D-0x000F
*
* High-level module nr (3 bits - 0x0...-0x7...)
* Name ID Nr of Errors
* PEM 1 9
* PKCS#12 1 4 (Started from top)
* X509 2 20
* PKCS5 2 4 (Started from top)
* DHM 3 9
* PK 3 14 (Started from top)
* RSA 4 10
* ECP 4 8 (Started from top)
* MD 5 4
* CIPHER 6 6
* SSL 6 17 (Started from top)
* SSL 7 31
*
* Module dependent error code (5 bits 0x.00.-0x.F8.)
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief Translate a mbed TLS error code into a string representation,
* Result is truncated if necessary and always includes a terminating
* null byte.
*
* \param errnum error code
* \param buffer buffer to place representation in
* \param buflen length of the buffer
*/
void mbedtls_strerror( int errnum, char *buffer, size_t buflen );
#ifdef __cplusplus
}
#endif
#endif /* error.h */