1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <stdio.h> 27 #include <stdlib.h> 28 #include <stdarg.h> 29 #include <syslog.h> 30 #include <string.h> 31 #include <cryptoutil.h> 32 33 #define CRYPTO_DEBUG_ENV "SUNW_CRYPTO_DEBUG" 34 35 static char *_cryptodebug_prefix = NULL; 36 static int _cryptodebug_enabled = -1; /* -1 unknown, 0 disabled, 1 enabled */ 37 static int _cryptoerror_enabled = 1; /* 0 disabled, 1 enabled */ 38 static boolean_t _cryptodebug_syslog = B_TRUE; 39 40 /*PRINTFLIKE1*/ 41 void 42 cryptodebug(const char *fmt, ...) 43 { 44 va_list args; 45 char fmtbuf[BUFSIZ]; 46 char msgbuf[BUFSIZ]; 47 48 if (fmt == NULL || _cryptodebug_enabled != 1) 49 return; 50 51 va_start(args, fmt); 52 if (_cryptodebug_prefix == NULL) { 53 (void) vsnprintf(msgbuf, sizeof (msgbuf), fmt, args); 54 } else { 55 (void) snprintf(fmtbuf, sizeof (fmtbuf), "%s: %s", 56 _cryptodebug_prefix, fmt); 57 (void) vsnprintf(msgbuf, sizeof (msgbuf), fmtbuf, args); 58 } 59 60 if (_cryptodebug_syslog) { 61 syslog(LOG_DEBUG, msgbuf); 62 } else { 63 (void) fprintf(stderr, "%s\n", msgbuf); 64 } 65 va_end(args); 66 } 67 68 /* 69 * cryptoerror 70 * 71 * This is intended to be used both by interactive commands like cryptoadm(1m) 72 * digest(1) etc, and by libraries libpkcs11, libelfsign etc. 73 * 74 * A library probably wants most (all?) of its errors going to syslog but 75 * commands are usually happy for them to go to stderr. 76 * 77 * If a syslog priority is passed we log on that priority. Otherwise we 78 * use LOG_STDERR to mean use stderr instead. LOG_STDERR is defined in 79 * cryptoutil.h 80 */ 81 82 /*PRINTFLIKE2*/ 83 void 84 cryptoerror(int priority, const char *fmt, ...) 85 { 86 char fmtbuf[BUFSIZ]; 87 char msgbuf[BUFSIZ]; 88 va_list args; 89 90 if (fmt == NULL || _cryptoerror_enabled == 0) 91 return; 92 93 va_start(args, fmt); 94 if (_cryptodebug_prefix == NULL) { 95 (void) vsnprintf(msgbuf, sizeof (msgbuf), fmt, args); 96 } else { 97 (void) snprintf(fmtbuf, sizeof (fmtbuf), "%s: %s", 98 _cryptodebug_prefix, fmt); 99 (void) vsnprintf(msgbuf, sizeof (msgbuf), fmtbuf, args); 100 } 101 102 if ((priority == LOG_STDERR) || (priority < 0)) { 103 (void) fprintf(stderr, "%s\n", msgbuf); 104 } else { 105 syslog(priority, msgbuf); 106 } 107 va_end(args); 108 } 109 110 void 111 cryptoerror_off() 112 { 113 _cryptoerror_enabled = 0; 114 } 115 116 void 117 cryptoerror_on() 118 { 119 _cryptoerror_enabled = 1; 120 } 121 122 void 123 cryptodebug_init(const char *prefix) 124 { 125 char *envval = NULL; 126 127 if (prefix != NULL) { 128 _cryptodebug_prefix = strdup(prefix); 129 } 130 131 if (_cryptodebug_enabled == -1) { 132 envval = getenv(CRYPTO_DEBUG_ENV); 133 /* 134 * If unset or it isn't one of syslog or stderr 135 * disable debug. 136 */ 137 if (envval == NULL || (strcmp(envval, "") == 0)) { 138 _cryptodebug_enabled = 0; 139 return; 140 } else if (strcmp(envval, "stderr") == 0) { 141 _cryptodebug_syslog = B_FALSE; 142 _cryptodebug_enabled = 1; 143 } else if (strcmp(envval, "syslog") == 0) { 144 _cryptodebug_syslog = B_TRUE; 145 _cryptodebug_enabled = 1; 146 } 147 } 148 149 openlog(_cryptodebug_prefix, LOG_PID, LOG_USER); 150 } 151 152 #pragma fini(_cryptodebug_fini) 153 154 static void 155 _cryptodebug_fini(void) 156 { 157 if (_cryptodebug_prefix != NULL) 158 free(_cryptodebug_prefix); 159 } 160