130 lines
4.9 KiB
C
130 lines
4.9 KiB
C
/**
|
|
* \file pem.h
|
|
*
|
|
* \brief Privacy Enhanced Mail (PEM) decoding
|
|
*
|
|
* 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_PEM_H
|
|
#define POLARSSL_PEM_H
|
|
|
|
#include <stddef.h>
|
|
|
|
/**
|
|
* \name PEM Error codes
|
|
* These error codes are returned in case of errors reading the
|
|
* PEM data.
|
|
* \{
|
|
*/
|
|
#define POLARSSL_ERR_PEM_NO_HEADER_FOOTER_PRESENT -0x1080 /**< No PEM header or footer found. */
|
|
#define POLARSSL_ERR_PEM_INVALID_DATA -0x1100 /**< PEM string is not as expected. */
|
|
#define POLARSSL_ERR_PEM_MALLOC_FAILED -0x1180 /**< Failed to allocate memory. */
|
|
#define POLARSSL_ERR_PEM_INVALID_ENC_IV -0x1200 /**< RSA IV is not in hex-format. */
|
|
#define POLARSSL_ERR_PEM_UNKNOWN_ENC_ALG -0x1280 /**< Unsupported key encryption algorithm. */
|
|
#define POLARSSL_ERR_PEM_PASSWORD_REQUIRED -0x1300 /**< Private key password can't be empty. */
|
|
#define POLARSSL_ERR_PEM_PASSWORD_MISMATCH -0x1380 /**< Given private key password does not allow for correct decryption. */
|
|
#define POLARSSL_ERR_PEM_FEATURE_UNAVAILABLE -0x1400 /**< Unavailable feature, e.g. hashing/encryption combination. */
|
|
#define POLARSSL_ERR_PEM_BAD_INPUT_DATA -0x1480 /**< Bad input parameters to function. */
|
|
/* \} name */
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#if defined(POLARSSL_PEM_PARSE_C)
|
|
/**
|
|
* \brief PEM context structure
|
|
*/
|
|
typedef struct
|
|
{
|
|
unsigned char *buf; /*!< buffer for decoded data */
|
|
size_t buflen; /*!< length of the buffer */
|
|
unsigned char *info; /*!< buffer for extra header information */
|
|
}
|
|
pem_context;
|
|
|
|
/**
|
|
* \brief PEM context setup
|
|
*
|
|
* \param ctx context to be initialized
|
|
*/
|
|
void pem_init( pem_context *ctx );
|
|
|
|
/**
|
|
* \brief Read a buffer for PEM information and store the resulting
|
|
* data into the specified context buffers.
|
|
*
|
|
* \param ctx context to use
|
|
* \param header header string to seek and expect
|
|
* \param footer footer string to seek and expect
|
|
* \param data source data to look in
|
|
* \param pwd password for decryption (can be NULL)
|
|
* \param pwdlen length of password
|
|
* \param use_len destination for total length used (set after header is
|
|
* correctly read, so unless you get
|
|
* POLARSSL_ERR_PEM_BAD_INPUT_DATA or
|
|
* POLARSSL_ERR_PEM_NO_HEADER_FOOTER_PRESENT, use_len is
|
|
* the length to skip)
|
|
*
|
|
* \note Attempts to check password correctness by verifying if
|
|
* the decrypted text starts with an ASN.1 sequence of
|
|
* appropriate length
|
|
*
|
|
* \return 0 on success, or a specific PEM error code
|
|
*/
|
|
int pem_read_buffer( pem_context *ctx, const char *header, const char *footer,
|
|
const unsigned char *data,
|
|
const unsigned char *pwd,
|
|
size_t pwdlen, size_t *use_len );
|
|
|
|
/**
|
|
* \brief PEM context memory freeing
|
|
*
|
|
* \param ctx context to be freed
|
|
*/
|
|
void pem_free( pem_context *ctx );
|
|
#endif /* POLARSSL_PEM_PARSE_C */
|
|
|
|
#if defined(POLARSSL_PEM_WRITE_C)
|
|
/**
|
|
* \brief Write a buffer of PEM information from a DER encoded
|
|
* buffer.
|
|
*
|
|
* \param header header string to write
|
|
* \param footer footer string to write
|
|
* \param der_data DER data to write
|
|
* \param der_len length of the DER data
|
|
* \param buf buffer to write to
|
|
* \param buf_len length of output buffer
|
|
* \param olen total length written / required (if buf_len is not enough)
|
|
*
|
|
* \return 0 on success, or a specific PEM or BASE64 error code. On
|
|
* POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL olen is the required
|
|
* size.
|
|
*/
|
|
int pem_write_buffer( const char *header, const char *footer,
|
|
const unsigned char *der_data, size_t der_len,
|
|
unsigned char *buf, size_t buf_len, size_t *olen );
|
|
#endif /* POLARSSL_PEM_WRITE_C */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* pem.h */
|