1 /* $OpenBSD: tls_internal.h,v 1.8 2022/07/22 19:33:53 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 <openssl/dh.h> 22 #include <openssl/evp.h> 23 24 #include "bytestring.h" 25 26 __BEGIN_HIDDEN_DECLS 27 28 #define TLS_IO_SUCCESS 1 29 #define TLS_IO_EOF 0 30 #define TLS_IO_FAILURE -1 31 #define TLS_IO_ALERT -2 32 #define TLS_IO_WANT_POLLIN -3 33 #define TLS_IO_WANT_POLLOUT -4 34 #define TLS_IO_WANT_RETRY -5 /* Retry the previous call immediately. */ 35 36 /* 37 * Callbacks. 38 */ 39 typedef ssize_t (*tls_read_cb)(void *_buf, size_t _buflen, void *_cb_arg); 40 typedef ssize_t (*tls_write_cb)(const void *_buf, size_t _buflen, 41 void *_cb_arg); 42 typedef ssize_t (*tls_flush_cb)(void *_cb_arg); 43 44 /* 45 * Buffers. 46 */ 47 struct tls_buffer; 48 49 struct tls_buffer *tls_buffer_new(size_t init_size); 50 void tls_buffer_clear(struct tls_buffer *buf); 51 void tls_buffer_free(struct tls_buffer *buf); 52 void tls_buffer_set_capacity_limit(struct tls_buffer *buf, size_t limit); 53 ssize_t tls_buffer_extend(struct tls_buffer *buf, size_t len, 54 tls_read_cb read_cb, void *cb_arg); 55 ssize_t tls_buffer_read(struct tls_buffer *buf, uint8_t *rbuf, size_t n); 56 ssize_t tls_buffer_write(struct tls_buffer *buf, const uint8_t *wbuf, size_t n); 57 int tls_buffer_append(struct tls_buffer *buf, const uint8_t *wbuf, size_t n); 58 int tls_buffer_data(struct tls_buffer *buf, CBS *cbs); 59 int tls_buffer_finish(struct tls_buffer *buf, uint8_t **out, size_t *out_len); 60 61 /* 62 * Key shares. 63 */ 64 struct tls_key_share; 65 66 struct tls_key_share *tls_key_share_new(uint16_t group_id); 67 struct tls_key_share *tls_key_share_new_nid(int nid); 68 void tls_key_share_free(struct tls_key_share *ks); 69 70 uint16_t tls_key_share_group(struct tls_key_share *ks); 71 int tls_key_share_nid(struct tls_key_share *ks); 72 void tls_key_share_set_key_bits(struct tls_key_share *ks, size_t key_bits); 73 int tls_key_share_set_dh_params(struct tls_key_share *ks, DH *dh_params); 74 int tls_key_share_peer_pkey(struct tls_key_share *ks, EVP_PKEY *pkey); 75 int tls_key_share_generate(struct tls_key_share *ks); 76 int tls_key_share_params(struct tls_key_share *ks, CBB *cbb); 77 int tls_key_share_public(struct tls_key_share *ks, CBB *cbb); 78 int tls_key_share_peer_params(struct tls_key_share *ks, CBS *cbs, 79 int *decode_error, int *invalid_params); 80 int tls_key_share_peer_public(struct tls_key_share *ks, CBS *cbs, 81 int *decode_error, int *invalid_key); 82 int tls_key_share_derive(struct tls_key_share *ks, uint8_t **shared_key, 83 size_t *shared_key_len); 84 int tls_key_share_peer_security(const SSL *ssl, struct tls_key_share *ks); 85 86 __END_HIDDEN_DECLS 87 88 #endif 89