1 /* $OpenBSD: tls_internal.h,v 1.1 2021/10/23 13:12:14 jsing Exp $ */ 2 /* 3 * Copyright (c) 2018, 2019, 2021 Joel Sing <jsing@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #ifndef HEADER_TLS_INTERNAL_H 19 #define HEADER_TLS_INTERNAL_H 20 21 #include "bytestring.h" 22 23 __BEGIN_HIDDEN_DECLS 24 25 #define TLS_IO_SUCCESS 1 26 #define TLS_IO_EOF 0 27 #define TLS_IO_FAILURE -1 28 #define TLS_IO_ALERT -2 29 #define TLS_IO_WANT_POLLIN -3 30 #define TLS_IO_WANT_POLLOUT -4 31 #define TLS_IO_WANT_RETRY -5 /* Retry the previous call immediately. */ 32 33 /* 34 * Callbacks. 35 */ 36 typedef ssize_t (*tls_read_cb)(void *_buf, size_t _buflen, void *_cb_arg); 37 typedef ssize_t (*tls_write_cb)(const void *_buf, size_t _buflen, 38 void *_cb_arg); 39 typedef ssize_t (*tls_flush_cb)(void *_cb_arg); 40 41 /* 42 * Buffers. 43 */ 44 struct tls_buffer; 45 46 struct tls_buffer *tls_buffer_new(size_t init_size); 47 int tls_buffer_set_data(struct tls_buffer *buf, CBS *data); 48 void tls_buffer_free(struct tls_buffer *buf); 49 ssize_t tls_buffer_extend(struct tls_buffer *buf, size_t len, 50 tls_read_cb read_cb, void *cb_arg); 51 void tls_buffer_cbs(struct tls_buffer *buf, CBS *cbs); 52 int tls_buffer_finish(struct tls_buffer *buf, uint8_t **out, size_t *out_len); 53 54 __END_HIDDEN_DECLS 55 56 #endif 57