1 /* $NetBSD: bufferevent_ssl.h,v 1.1.1.1 2013/04/11 16:43:34 christos Exp $ */ 2 /* 3 * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #ifndef _EVENT2_BUFFEREVENT_SSL_H_ 28 #define _EVENT2_BUFFEREVENT_SSL_H_ 29 30 /** @file event2/bufferevent_ssl.h 31 32 OpenSSL support for bufferevents. 33 */ 34 35 #include <event2/event-config.h> 36 #include <event2/bufferevent.h> 37 #include <event2/util.h> 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 /* This is what openssl's SSL objects are underneath. */ 44 struct ssl_st; 45 46 /** 47 The state of an SSL object to be used when creating a new 48 SSL bufferevent. 49 */ 50 enum bufferevent_ssl_state { 51 BUFFEREVENT_SSL_OPEN = 0, 52 BUFFEREVENT_SSL_CONNECTING = 1, 53 BUFFEREVENT_SSL_ACCEPTING = 2 54 }; 55 56 #if defined(_EVENT_HAVE_OPENSSL) || defined(_EVENT_IN_DOXYGEN) 57 /** 58 Create a new SSL bufferevent to send its data over another bufferevent. 59 60 @param base An event_base to use to detect reading and writing. It 61 must also be the base for the underlying bufferevent. 62 @param underlying A socket to use for this SSL 63 @param ssl A SSL* object from openssl. 64 @param state The current state of the SSL connection 65 @param options One or more bufferevent_options 66 @return A new bufferevent on success, or NULL on failure 67 */ 68 struct bufferevent * 69 bufferevent_openssl_filter_new(struct event_base *base, 70 struct bufferevent *underlying, 71 struct ssl_st *ssl, 72 enum bufferevent_ssl_state state, 73 int options); 74 75 /** 76 Create a new SSL bufferevent to send its data over an SSL * on a socket. 77 78 @param base An event_base to use to detect reading and writing 79 @param fd A socket to use for this SSL 80 @param ssl A SSL* object from openssl. 81 @param state The current state of the SSL connection 82 @param options One or more bufferevent_options 83 @return A new bufferevent on success, or NULL on failure. 84 */ 85 struct bufferevent * 86 bufferevent_openssl_socket_new(struct event_base *base, 87 evutil_socket_t fd, 88 struct ssl_st *ssl, 89 enum bufferevent_ssl_state state, 90 int options); 91 92 /** Return the underlying openssl SSL * object for an SSL bufferevent. */ 93 struct ssl_st * 94 bufferevent_openssl_get_ssl(struct bufferevent *bufev); 95 96 /** Tells a bufferevent to begin SSL renegotiation. */ 97 int bufferevent_ssl_renegotiate(struct bufferevent *bev); 98 99 /** Return the most recent OpenSSL error reported on an SSL bufferevent. */ 100 unsigned long bufferevent_get_openssl_error(struct bufferevent *bev); 101 102 #endif 103 104 #ifdef __cplusplus 105 } 106 #endif 107 108 #endif /* _EVENT2_BUFFEREVENT_SSL_H_ */ 109