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/*
* Asterisk -- A telephony toolkit for Linux.
*
* Provide cryptographic signature routines
*
* Copyright (C) 1999, Mark Spencer
*
* Mark Spencer <markster@linux-support.net>
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
#ifndef _ASTERISK_CRYPTO_H
#define _ASTERISK_CRYPTO_H
#include <asterisk/channel.h>
#include <asterisk/file.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define AST_KEY_PUBLIC (1 << 0)
#define AST_KEY_PRIVATE (1 << 1)
struct ast_key;
//! Retrieve a key
/*!
* \param name of the key we are retrieving
* \param int type of key (AST_KEY_PUBLIC or AST_KEY_PRIVATE)
*
* Returns the key on success or NULL on failure
*/
extern struct ast_key *ast_key_get(char *key, int type);
//! Initialize keys (that is, retrieve pass codes for all private keys)
/*!
* \param fd a file descriptor for I/O for passwords
*
*/
extern int ast_key_init(int fd);
//! Check the authenticity of a message signature using a given public key
/*!
* \param key a public key to use to verify
* \param msg the message that has been signed
* \param sig the proposed valid signature in mime64-like encoding
*
* Returns 0 if the signature is valid, or -1 otherwise
*
*/
extern int ast_check_signature(struct ast_key *key, char *msg, char *sig);
/*!
* \param key a private key to use to create the signature
* \param msg the message to sign
* \param sig a pointer to a buffer of at least 256 bytes in which the
* mime64-like encoded signature will be stored
*
* Returns 0 on success or -1 on failure.
*
*/
extern int ast_sign(struct ast_key *key, char *msg, char *sig);
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif
#endif
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