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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <stdarg.h> 32 #include <syslog.h> 33 #include <string.h> 34 #include <cryptoutil.h> 35 36 #define CRYPTO_DEBUG_ENV "SUNW_CRYPTO_DEBUG" 37 38 static char *_cryptodebug_prefix = NULL; 39 static int _cryptodebug_enabled = -1; /* -1 unknown, 0 disabled, 1 enabled */ 40 static boolean_t _cryptodebug_syslog = B_TRUE; 41 42 /*PRINTFLIKE1*/ 43 void 44 cryptodebug(const char *fmt, ...) 45 { 46 va_list args; 47 char fmtbuf[BUFSIZ]; 48 char msgbuf[BUFSIZ]; 49 50 if (fmt == NULL || _cryptodebug_enabled != 1) 51 return; 52 53 va_start(args, fmt); 54 if (_cryptodebug_prefix == NULL) { 55 (void) vsnprintf(msgbuf, sizeof (msgbuf), fmt, args); 56 } else { 57 (void) snprintf(fmtbuf, sizeof (fmtbuf), "%s: %s", 58 _cryptodebug_prefix, fmt); 59 (void) vsnprintf(msgbuf, sizeof (msgbuf), fmtbuf, args); 60 } 61 62 if (_cryptodebug_syslog) { 63 syslog(LOG_DEBUG, msgbuf); 64 } else { 65 (void) fprintf(stderr, "%s\n", msgbuf); 66 } 67 va_end(args); 68 } 69 70 /* 71 * cryptoerror 72 * 73 * This is intended to be used both by interactive commands like cryptoadm(1m) 74 * digest(1) etc, and by libraries libpkcs11, libelfsign etc. 75 * 76 * A library probably wants most (all?) of its errors going to syslog but 77 * commands are usually happy for them to go to stderr. 78 * 79 * If a syslog priority is passed we log on that priority. Otherwise we 80 * use LOG_STDERR to mean use stderr instead. LOG_STDERR is defined in 81 * cryptoutil.h 82 */ 83 84 /*PRINTFLIKE2*/ 85 void 86 cryptoerror(int priority, const char *fmt, ...) 87 { 88 char fmtbuf[BUFSIZ]; 89 char msgbuf[BUFSIZ]; 90 va_list args; 91 92 if (fmt == NULL) 93 return; 94 95 va_start(args, fmt); 96 if (_cryptodebug_prefix == NULL) { 97 (void) vsnprintf(msgbuf, sizeof (msgbuf), fmt, args); 98 } else { 99 (void) snprintf(fmtbuf, sizeof (fmtbuf), "%s: %s", 100 _cryptodebug_prefix, fmt); 101 (void) vsnprintf(msgbuf, sizeof (msgbuf), fmtbuf, args); 102 } 103 104 if ((priority == LOG_STDERR) || (priority < 0)) { 105 (void) fprintf(stderr, "%s\n", msgbuf); 106 } else { 107 syslog(priority, msgbuf); 108 } 109 va_end(args); 110 } 111 112 void 113 cryptodebug_init(const char *prefix) 114 { 115 char *envval = NULL; 116 117 if (prefix != NULL) { 118 _cryptodebug_prefix = strdup(prefix); 119 } 120 121 if (_cryptodebug_enabled == -1) { 122 envval = getenv(CRYPTO_DEBUG_ENV); 123 /* 124 * If unset or it isn't one of syslog or stderr 125 * disable debug. 126 */ 127 if (envval == NULL || (strcmp(envval, "") == 0)) { 128 _cryptodebug_enabled = 0; 129 return; 130 } else if (strcmp(envval, "stderr") == 0) { 131 _cryptodebug_syslog = B_FALSE; 132 _cryptodebug_enabled = 1; 133 } else if (strcmp(envval, "syslog") == 0) { 134 _cryptodebug_syslog = B_TRUE; 135 _cryptodebug_enabled = 1; 136 } 137 } 138 139 openlog(_cryptodebug_prefix, LOG_PID, LOG_USER); 140 } 141 142 #pragma fini(_cryptodebug_fini) 143 144 static void 145 _cryptodebug_fini(void) 146 { 147 if (_cryptodebug_prefix != NULL) 148 free(_cryptodebug_prefix); 149 } 150