1 /* $OpenBSD: bio_local.h,v 1.6 2024/03/02 09:18:28 tb Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #ifndef HEADER_BIO_LOCAL_H 60 #define HEADER_BIO_LOCAL_H 61 62 #include <stdarg.h> 63 64 __BEGIN_HIDDEN_DECLS 65 66 struct bio_method_st { 67 int type; 68 const char *name; 69 int (*bwrite)(BIO *, const char *, int); 70 int (*bread)(BIO *, char *, int); 71 int (*bputs)(BIO *, const char *); 72 int (*bgets)(BIO *, char *, int); 73 long (*ctrl)(BIO *, int, long, void *); 74 int (*create)(BIO *); 75 int (*destroy)(BIO *); 76 long (*callback_ctrl)(BIO *, int, BIO_info_cb *); 77 } /* BIO_METHOD */; 78 79 struct bio_st { 80 const BIO_METHOD *method; 81 BIO_callback_fn callback; 82 BIO_callback_fn_ex callback_ex; 83 char *cb_arg; /* first argument for the callback */ 84 85 int init; 86 int shutdown; 87 int flags; /* extra storage */ 88 int retry_reason; 89 int num; 90 void *ptr; 91 struct bio_st *next_bio; /* used by filter BIOs */ 92 struct bio_st *prev_bio; /* used by filter BIOs */ 93 int references; 94 unsigned long num_read; 95 unsigned long num_write; 96 97 CRYPTO_EX_DATA ex_data; 98 } /* BIO */; 99 100 typedef struct bio_f_buffer_ctx_struct { 101 /* Buffers are setup like this: 102 * 103 * <---------------------- size -----------------------> 104 * +---------------------------------------------------+ 105 * | consumed | remaining | free space | 106 * +---------------------------------------------------+ 107 * <-- off --><------- len -------> 108 */ 109 110 /* BIO *bio; */ /* this is now in the BIO struct */ 111 int ibuf_size; /* how big is the input buffer */ 112 int obuf_size; /* how big is the output buffer */ 113 114 char *ibuf; /* the char array */ 115 int ibuf_len; /* how many bytes are in it */ 116 int ibuf_off; /* write/read offset */ 117 118 char *obuf; /* the char array */ 119 int obuf_len; /* how many bytes are in it */ 120 int obuf_off; /* write/read offset */ 121 } BIO_F_BUFFER_CTX; 122 123 int BIO_vprintf(BIO *bio, const char *format, va_list args); 124 125 __END_HIDDEN_DECLS 126 127 #endif /* !HEADER_BIO_LOCAL_H */ 128