1 /* $OpenBSD: bio_cb.c,v 1.17 2021/03/25 09:26:17 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 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 63 #include <openssl/err.h> 64 #include <openssl/bio.h> 65 66 long 67 BIO_debug_callback(BIO *bio, int cmd, const char *argp, int argi, long argl, 68 long ret) 69 { 70 BIO *b; 71 char buf[256]; 72 char *p; 73 int nbuf; 74 long r = 1; 75 size_t p_maxlen; 76 77 if (BIO_CB_RETURN & cmd) 78 r = ret; 79 80 nbuf = snprintf(buf, sizeof(buf), "BIO[%p]: ", bio); 81 if (nbuf < 0) 82 nbuf = 0; /* Ignore error; continue printing. */ 83 if (nbuf >= sizeof(buf)) 84 goto out; 85 86 p = buf + nbuf; 87 p_maxlen = sizeof(buf) - nbuf; 88 89 switch (cmd) { 90 case BIO_CB_FREE: 91 snprintf(p, p_maxlen, "Free - %s\n", bio->method->name); 92 break; 93 case BIO_CB_READ: 94 if (bio->method->type & BIO_TYPE_DESCRIPTOR) 95 snprintf(p, p_maxlen, 96 "read(%d,%lu) - %s fd=%d\n", 97 bio->num, (unsigned long)argi, 98 bio->method->name, bio->num); 99 else 100 snprintf(p, p_maxlen, "read(%d,%lu) - %s\n", 101 bio->num, (unsigned long)argi, bio->method->name); 102 break; 103 case BIO_CB_WRITE: 104 if (bio->method->type & BIO_TYPE_DESCRIPTOR) 105 snprintf(p, p_maxlen, 106 "write(%d,%lu) - %s fd=%d\n", 107 bio->num, (unsigned long)argi, 108 bio->method->name, bio->num); 109 else 110 snprintf(p, p_maxlen, "write(%d,%lu) - %s\n", 111 bio->num, (unsigned long)argi, bio->method->name); 112 break; 113 case BIO_CB_PUTS: 114 snprintf(p, p_maxlen, 115 "puts() - %s\n", bio->method->name); 116 break; 117 case BIO_CB_GETS: 118 snprintf(p, p_maxlen, "gets(%lu) - %s\n", 119 (unsigned long)argi, bio->method->name); 120 break; 121 case BIO_CB_CTRL: 122 snprintf(p, p_maxlen, "ctrl(%lu) - %s\n", 123 (unsigned long)argi, bio->method->name); 124 break; 125 case BIO_CB_RETURN|BIO_CB_READ: 126 snprintf(p, p_maxlen, "read return %ld\n", ret); 127 break; 128 case BIO_CB_RETURN|BIO_CB_WRITE: 129 snprintf(p, p_maxlen, "write return %ld\n", ret); 130 break; 131 case BIO_CB_RETURN|BIO_CB_GETS: 132 snprintf(p, p_maxlen, "gets return %ld\n", ret); 133 break; 134 case BIO_CB_RETURN|BIO_CB_PUTS: 135 snprintf(p, p_maxlen, "puts return %ld\n", ret); 136 break; 137 case BIO_CB_RETURN|BIO_CB_CTRL: 138 snprintf(p, p_maxlen, "ctrl return %ld\n", ret); 139 break; 140 default: 141 snprintf(p, p_maxlen, 142 "bio callback - unknown type (%d)\n", cmd); 143 break; 144 } 145 146 out: 147 b = (BIO *)bio->cb_arg; 148 if (b != NULL) 149 BIO_write(b, buf, strlen(buf)); 150 else 151 fputs(buf, stderr); 152 return (r); 153 } 154