| 1 | /* |
| 2 | ** Copyright 2002 Double Precision, Inc. See COPYING for |
| 3 | ** distribution information. |
| 4 | */ |
| 5 | |
| 6 | #include "auth.h" |
| 7 | #include "courierauthdebug.h" |
| 8 | #include <ctype.h> |
| 9 | #include <stdarg.h> |
| 10 | #include <stdio.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <string.h> |
| 13 | |
| 14 | static const char rcsid[]="$Id: debug.c,v 1.7 2004/11/21 03:14:58 mrsam Exp $"; |
| 15 | |
| 16 | /* for internal use */ |
| 17 | |
| 18 | static int courier_authdebug( const char *ofmt, const char *fmt, va_list ap ); |
| 19 | |
| 20 | /* |
| 21 | ** 0 - dont debug |
| 22 | ** 1 - debug auth |
| 23 | ** 2 - debug auth + write out passwords |
| 24 | */ |
| 25 | |
| 26 | int courier_authdebug_login_level = 0; |
| 27 | |
| 28 | /* |
| 29 | ** purpose: initialize debugging |
| 30 | ** function: read environment variable DEBUG_LOGIN |
| 31 | ** and set up debugging according to it |
| 32 | ** args: none |
| 33 | */ |
| 34 | |
| 35 | void courier_authdebug_login_init( void ) |
| 36 | { |
| 37 | const char *p=getenv(DEBUG_LOGIN_ENV); |
| 38 | |
| 39 | courier_authdebug_login_level = atoi( p ? p:"0" ); |
| 40 | } |
| 41 | |
| 42 | /* |
| 43 | ** purpose: print debug message to logger |
| 44 | ** does nothing if debug level is zero |
| 45 | ** adds prefix "DEBUG: " and suffix "\n" |
| 46 | ** Since we have a return value, we can use the convenient production |
| 47 | ** courier_authdebug_login_level && courier_authdebug_printf(...) |
| 48 | ** (as a macro, saves function calls when debugging is disabled) |
| 49 | */ |
| 50 | |
| 51 | int courier_authdebug_printf( const char *fmt, ... ) { |
| 52 | |
| 53 | va_list ap; |
| 54 | int rc; |
| 55 | |
| 56 | if (courier_authdebug_login_level == 0) return 0; |
| 57 | va_start( ap, fmt ); |
| 58 | rc = courier_authdebug( "DEBUG: %s\n", fmt, ap ); |
| 59 | va_end( ap ); |
| 60 | return rc; |
| 61 | } |
| 62 | |
| 63 | /* |
| 64 | * Print a string to stderr, replacing any control characters with dot and |
| 65 | * limiting the total message size, followed by a newline |
| 66 | */ |
| 67 | |
| 68 | int courier_safe_printf(const char *fmt, ...) |
| 69 | { |
| 70 | va_list ap; |
| 71 | int rc; |
| 72 | |
| 73 | va_start( ap, fmt ); |
| 74 | rc = courier_authdebug( "%s\n", fmt, ap ); |
| 75 | va_end( ap ); |
| 76 | return rc; |
| 77 | } |
| 78 | |
| 79 | /** Print error log message **/ |
| 80 | |
| 81 | int courier_auth_err( const char *fmt, ... ) { |
| 82 | |
| 83 | va_list ap; |
| 84 | int rc; |
| 85 | |
| 86 | va_start( ap, fmt ); |
| 87 | rc = courier_authdebug( "ERR: %s\n", fmt, ap ); |
| 88 | va_end( ap ); |
| 89 | return rc; |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | ** purpose: print debug messages to logger - handy use |
| 94 | ** function: take message with logging level and drop |
| 95 | ** messages with too high level. |
| 96 | ** also include into the message the IP address |
| 97 | ** args: |
| 98 | ** * level - level to be compared with DEBUG_LOGIN env var. |
| 99 | ** * fmt - message format as like in printf(). |
| 100 | ** * ... - and "arguments" for fmt |
| 101 | */ |
| 102 | |
| 103 | void courier_authdebug_login( int level, const char *fmt, ... ) { |
| 104 | |
| 105 | va_list ap; |
| 106 | char ofmt[128]; |
| 107 | |
| 108 | /* logging severity */ |
| 109 | |
| 110 | if( level > courier_authdebug_login_level ) |
| 111 | return; |
| 112 | |
| 113 | snprintf( ofmt, sizeof ofmt, "DEBUG: LOGIN: ip=[%s], %%s\n", getenv("TCPREMOTEIP") ); |
| 114 | va_start( ap, fmt ); |
| 115 | courier_authdebug( ofmt, fmt, ap ); |
| 116 | va_end( ap ); |
| 117 | } |
| 118 | |
| 119 | /* |
| 120 | ** purpose: print debug messages to logger - general use |
| 121 | ** function: read format string and arguments |
| 122 | ** and convert them to suitable form for output. |
| 123 | ** args: |
| 124 | ** ofmt- printf() format string for output, where %s = the assembled text |
| 125 | ** fmt - printf() format string for arguments |
| 126 | ** ... - variable arguments |
| 127 | */ |
| 128 | |
| 129 | static int courier_authdebug( const char *ofmt, const char *fmt, va_list ap ) |
| 130 | { |
| 131 | |
| 132 | char buf[DEBUG_MESSAGE_SIZE]; |
| 133 | int i; |
| 134 | int len; |
| 135 | |
| 136 | /* print into buffer to be able to replace control and other unwanted chars. */ |
| 137 | vsnprintf( buf, DEBUG_MESSAGE_SIZE, fmt, ap ); |
| 138 | len = strlen( buf ); |
| 139 | |
| 140 | /* replace nonprintable chars by dot */ |
| 141 | for( i=0 ; i<len ; i++ ) |
| 142 | if( !isprint(buf[i]) ) |
| 143 | buf[i] = '.'; |
| 144 | |
| 145 | /* emit it */ |
| 146 | |
| 147 | return fprintf( stderr, ofmt , buf ); |
| 148 | } |
| 149 | |
| 150 | /* |
| 151 | * Print the information retrieved from the database into struct authinfo. |
| 152 | * |
| 153 | * The structure members 'clearpasswd' and 'passwd' are not always set at |
| 154 | * the point where this function is called, so we take separate values |
| 155 | * for these |
| 156 | */ |
| 157 | |
| 158 | int courier_authdebug_authinfo(const char *pfx, const struct authinfo *auth, |
| 159 | const char *clearpasswd, const char *passwd) |
| 160 | { |
| 161 | char uidstr[32] = "<null>"; |
| 162 | |
| 163 | if (!courier_authdebug_login_level) return 0; |
| 164 | |
| 165 | if (auth->sysuserid) |
| 166 | snprintf(uidstr, sizeof uidstr, "%ld", (long)*auth->sysuserid); |
| 167 | fprintf(stderr, "%ssysusername=%s, sysuserid=%s, " |
| 168 | "sysgroupid=%ld, homedir=%s, address=%s, fullname=%s, " |
| 169 | "maildir=%s, quota=%s, options=%s\n", pfx, |
| 170 | auth->sysusername ? auth->sysusername : "<null>", |
| 171 | uidstr, (long)auth->sysgroupid, |
| 172 | auth->homedir ? auth->homedir : "<null>", |
| 173 | auth->address ? auth->address : "<null>", |
| 174 | auth->fullname ? auth->fullname : "<null>", |
| 175 | auth->maildir ? auth->maildir : "<null>", |
| 176 | auth->quota ? auth->quota : "<null>", |
| 177 | auth->options ? auth->options : "<null>"); |
| 178 | if (courier_authdebug_login_level >= 2) |
| 179 | fprintf(stderr, "%sclearpasswd=%s, passwd=%s\n", pfx, |
| 180 | clearpasswd ? clearpasswd : "<null>", |
| 181 | passwd ? passwd : "<null>"); |
| 182 | return 0; |
| 183 | } |
| 184 | |