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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*
* Provide cryptographic signature routines
*/
#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);
/*! 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 raw binary representation
*
* Returns 0 if the signature is valid, or -1 otherwise
*
*/
extern int ast_check_signature_bin(struct ast_key *key, char *msg, int msglen, unsigned 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);
/*!
* \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 128 bytes in which the
* raw encoded signature will be stored
*
* Returns 0 on success or -1 on failure.
*
*/
extern int ast_sign_bin(struct ast_key *key, char *msg, int msglen, unsigned char *sig);
/*!
* \param key a private key to use to encrypt
* \param src the message to encrypt
* \param srclen the length of the message to encrypt
* \param dst a pointer to a buffer of at least srclen * 1.5 bytes in which the encrypted
* answer will be stored
*
* Returns length of encrypted data on success or -1 on failure.
*
*/
extern int ast_encrypt_bin(unsigned char *dst, const unsigned char *src, int srclen, struct ast_key *key);
/*!
* \param key a private key to use to decrypt
* \param src the message to decrypt
* \param srclen the length of the message to decrypt
* \param dst a pointer to a buffer of at least srclen bytes in which the decrypted
* answer will be stored
*
* Returns length of decrypted data on success or -1 on failure.
*
*/
extern int ast_decrypt_bin(unsigned char *dst, const unsigned char *src, int srclen, struct ast_key *key);
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif
#endif /* _ASTERISK_CRYPTO_H */
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