key.h (2640B)
1 /* 2 * key.h 3 * 4 * key usage limits enforcement 5 * 6 * David A. Mcgrew 7 * Cisco Systems, Inc. 8 */ 9 /* 10 * 11 * Copyright (c) 2001-2017 Cisco Systems, Inc. 12 * All rights reserved. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 18 * Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 21 * Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials provided 24 * with the distribution. 25 * 26 * Neither the name of the Cisco Systems, Inc. nor the names of its 27 * contributors may be used to endorse or promote products derived 28 * from this software without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 33 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 34 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 35 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 36 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 37 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 41 * OF THE POSSIBILITY OF SUCH DAMAGE. 42 * 43 */ 44 45 #ifndef KEY_H 46 #define KEY_H 47 48 #include "rdbx.h" /* for srtp_xtd_seq_num_t */ 49 #include "err.h" 50 51 #ifdef __cplusplus 52 extern "C" { 53 #endif 54 55 typedef struct srtp_key_limit_ctx_t *srtp_key_limit_t; 56 57 typedef enum { 58 srtp_key_event_normal, 59 srtp_key_event_soft_limit, 60 srtp_key_event_hard_limit 61 } srtp_key_event_t; 62 63 srtp_err_status_t srtp_key_limit_set(srtp_key_limit_t key, 64 const srtp_xtd_seq_num_t s); 65 66 srtp_err_status_t srtp_key_limit_clone(srtp_key_limit_t original, 67 srtp_key_limit_t *new_key); 68 69 srtp_key_event_t srtp_key_limit_update(srtp_key_limit_t key); 70 71 typedef enum { 72 srtp_key_state_normal, 73 srtp_key_state_past_soft_limit, 74 srtp_key_state_expired 75 } srtp_key_state_t; 76 77 typedef struct srtp_key_limit_ctx_t { 78 srtp_xtd_seq_num_t num_left; 79 srtp_key_state_t state; 80 } srtp_key_limit_ctx_t; 81 82 #ifdef __cplusplus 83 } 84 #endif 85 86 #endif /* KEY_H */