Diff: include/polarssl/error.h

Revision:

0:137634ff4186

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/polarssl/error.h	Thu Jun 11 03:27:03 2015 +0000
@@ -0,0 +1,121 @@
+/**
+ * \file error.h
+ *
+ * \brief Error to string translation
+ *
+ *  Copyright (C) 2006-2013, ARM Limited, All Rights Reserved
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_ERROR_H
+#define POLARSSL_ERROR_H
+
+#include <stddef.h>
+
+/**
+ * Error code layout.
+ *
+ * Currently we try to keep all error codes within the negative space of 16
+ * bytes signed integers to support all platforms (-0x0000 - -0x8000). 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  - 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
+ * 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
+ * NET      11  0x0042-0x0056
+ * ENTROPY   1  0x0058-0x0058
+ * ASN1      7  0x0060-0x006C
+ * MD2       1  0x0070-0x0070
+ * MD4       1  0x0072-0x0072
+ * MD5       1  0x0074-0x0074
+ * SHA1      1  0x0076-0x0076
+ * SHA256    1  0x0078-0x0078
+ * SHA512    1  0x007A-0x007A
+ * PBKDF2    1  0x007C-0x007C
+ * RIPEMD160 1  0x007E-0x007E
+ * 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   18
+ * PK        2   14 (Started from top, plus 0x2000)
+ * DHM       3   9
+ * PKCS5     3   4 (Started from top)
+ * RSA       4   9
+ * ECP       4   8 (Started from top)
+ * MD        5   4
+ * CIPHER    6   6
+ * SSL       6   11 (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 polarssl_strerror( int errnum, char *buffer, size_t buflen );
+
+#if defined(POLARSSL_ERROR_STRERROR_BC)
+void error_strerror( int errnum, char *buffer, size_t buflen );
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* error.h */
+