00001 /* 00002 * Asterisk -- An open source telephony toolkit. 00003 * 00004 * Copyright (C) 1999 - 2005, Digium, Inc. 00005 * 00006 * Mark Spencer <markster@digium.com> 00007 * 00008 * See http://www.asterisk.org for more information about 00009 * the Asterisk project. Please do not directly contact 00010 * any of the maintainers of this project for assistance; 00011 * the project provides a web site, mailing lists and IRC 00012 * channels for your use. 00013 * 00014 * This program is free software, distributed under the terms of 00015 * the GNU General Public License Version 2. See the LICENSE file 00016 * at the top of the source tree. 00017 */ 00018 00019 /*! \file 00020 * \brief Provide cryptographic signature routines 00021 */ 00022 00023 #ifndef _ASTERISK_CRYPTO_H 00024 #define _ASTERISK_CRYPTO_H 00025 00026 #if defined(__cplusplus) || defined(c_plusplus) 00027 extern "C" { 00028 #endif 00029 00030 #define AST_KEY_PUBLIC (1 << 0) 00031 #define AST_KEY_PRIVATE (1 << 1) 00032 00033 struct ast_key; 00034 00035 /*! \brief Retrieve a key 00036 * \param name of the key we are retrieving 00037 * \param int type of key (AST_KEY_PUBLIC or AST_KEY_PRIVATE) 00038 * 00039 * Returns the key on success or NULL on failure 00040 */ 00041 extern struct ast_key *(*ast_key_get)(const char *key, int type); 00042 00043 /*! \brief Check the authenticity of a message signature using a given public key 00044 * \param key a public key to use to verify 00045 * \param msg the message that has been signed 00046 * \param sig the proposed valid signature in mime64-like encoding 00047 * 00048 * Returns 0 if the signature is valid, or -1 otherwise 00049 * 00050 */ 00051 extern int (*ast_check_signature)(struct ast_key *key, const char *msg, const char *sig); 00052 00053 /*! \brief Check the authenticity of a message signature using a given public key 00054 * \param key a public key to use to verify 00055 * \param msg the message that has been signed 00056 * \param sig the proposed valid signature in raw binary representation 00057 * 00058 * Returns 0 if the signature is valid, or -1 otherwise 00059 * 00060 */ 00061 extern int (*ast_check_signature_bin)(struct ast_key *key, const char *msg, int msglen, const unsigned char *sig); 00062 00063 /*! 00064 * \param key a private key to use to create the signature 00065 * \param msg the message to sign 00066 * \param sig a pointer to a buffer of at least 256 bytes in which the 00067 * mime64-like encoded signature will be stored 00068 * 00069 * Returns 0 on success or -1 on failure. 00070 * 00071 */ 00072 extern int (*ast_sign)(struct ast_key *key, char *msg, char *sig); 00073 00074 /*! 00075 * \param key a private key to use to create the signature 00076 * \param msg the message to sign 00077 * \param sig a pointer to a buffer of at least 128 bytes in which the 00078 * raw encoded signature will be stored 00079 * 00080 * Returns 0 on success or -1 on failure. 00081 * 00082 */ 00083 extern int (*ast_sign_bin)(struct ast_key *key, const char *msg, int msglen, unsigned char *sig); 00084 00085 /*! 00086 * \param key a private key to use to encrypt 00087 * \param src the message to encrypt 00088 * \param srclen the length of the message to encrypt 00089 * \param dst a pointer to a buffer of at least srclen * 1.5 bytes in which the encrypted 00090 * answer will be stored 00091 * 00092 * Returns length of encrypted data on success or -1 on failure. 00093 * 00094 */ 00095 extern int (*ast_encrypt_bin)(unsigned char *dst, const unsigned char *src, int srclen, struct ast_key *key); 00096 00097 /*! 00098 * \param key a private key to use to decrypt 00099 * \param src the message to decrypt 00100 * \param srclen the length of the message to decrypt 00101 * \param dst a pointer to a buffer of at least srclen bytes in which the decrypted 00102 * answer will be stored 00103 * 00104 * Returns length of decrypted data on success or -1 on failure. 00105 * 00106 */ 00107 extern int (*ast_decrypt_bin)(unsigned char *dst, const unsigned char *src, int srclen, struct ast_key *key); 00108 #if defined(__cplusplus) || defined(c_plusplus) 00109 } 00110 #endif 00111 00112 #endif /* _ASTERISK_CRYPTO_H */