1*f7e6344dSDag-Erling Smørgrav /*- 2*f7e6344dSDag-Erling Smørgrav * Copyright (c) 2003 Networks Associates Technology, Inc. 3*f7e6344dSDag-Erling Smørgrav * Copyright (c) 2004-2011 Dag-Erling Smørgrav 4*f7e6344dSDag-Erling Smørgrav * All rights reserved. 5*f7e6344dSDag-Erling Smørgrav * 6*f7e6344dSDag-Erling Smørgrav * This software was developed for the FreeBSD Project by ThinkSec AS and 7*f7e6344dSDag-Erling Smørgrav * Network Associates Laboratories, the Security Research Division of 8*f7e6344dSDag-Erling Smørgrav * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 9*f7e6344dSDag-Erling Smørgrav * ("CBOSS"), as part of the DARPA CHATS research program. 10*f7e6344dSDag-Erling Smørgrav * 11*f7e6344dSDag-Erling Smørgrav * Redistribution and use in source and binary forms, with or without 12*f7e6344dSDag-Erling Smørgrav * modification, are permitted provided that the following conditions 13*f7e6344dSDag-Erling Smørgrav * are met: 14*f7e6344dSDag-Erling Smørgrav * 1. Redistributions of source code must retain the above copyright 15*f7e6344dSDag-Erling Smørgrav * notice, this list of conditions and the following disclaimer. 16*f7e6344dSDag-Erling Smørgrav * 2. Redistributions in binary form must reproduce the above copyright 17*f7e6344dSDag-Erling Smørgrav * notice, this list of conditions and the following disclaimer in the 18*f7e6344dSDag-Erling Smørgrav * documentation and/or other materials provided with the distribution. 19*f7e6344dSDag-Erling Smørgrav * 3. The name of the author may not be used to endorse or promote 20*f7e6344dSDag-Erling Smørgrav * products derived from this software without specific prior written 21*f7e6344dSDag-Erling Smørgrav * permission. 22*f7e6344dSDag-Erling Smørgrav * 23*f7e6344dSDag-Erling Smørgrav * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24*f7e6344dSDag-Erling Smørgrav * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25*f7e6344dSDag-Erling Smørgrav * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26*f7e6344dSDag-Erling Smørgrav * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27*f7e6344dSDag-Erling Smørgrav * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28*f7e6344dSDag-Erling Smørgrav * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29*f7e6344dSDag-Erling Smørgrav * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30*f7e6344dSDag-Erling Smørgrav * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31*f7e6344dSDag-Erling Smørgrav * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32*f7e6344dSDag-Erling Smørgrav * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33*f7e6344dSDag-Erling Smørgrav * SUCH DAMAGE. 34*f7e6344dSDag-Erling Smørgrav * 35*f7e6344dSDag-Erling Smørgrav * $Id: openpam_readline.c 596 2012-04-14 14:52:40Z des $ 36*f7e6344dSDag-Erling Smørgrav */ 37*f7e6344dSDag-Erling Smørgrav 38*f7e6344dSDag-Erling Smørgrav #ifdef HAVE_CONFIG_H 39*f7e6344dSDag-Erling Smørgrav # include "config.h" 40*f7e6344dSDag-Erling Smørgrav #endif 41*f7e6344dSDag-Erling Smørgrav 42*f7e6344dSDag-Erling Smørgrav #include <ctype.h> 43*f7e6344dSDag-Erling Smørgrav #include <stdio.h> 44*f7e6344dSDag-Erling Smørgrav #include <stdlib.h> 45*f7e6344dSDag-Erling Smørgrav 46*f7e6344dSDag-Erling Smørgrav #include <security/pam_appl.h> 47*f7e6344dSDag-Erling Smørgrav 48*f7e6344dSDag-Erling Smørgrav #include "openpam_impl.h" 49*f7e6344dSDag-Erling Smørgrav 50*f7e6344dSDag-Erling Smørgrav #define MIN_LINE_LENGTH 128 51*f7e6344dSDag-Erling Smørgrav 52*f7e6344dSDag-Erling Smørgrav /* 53*f7e6344dSDag-Erling Smørgrav * OpenPAM extension 54*f7e6344dSDag-Erling Smørgrav * 55*f7e6344dSDag-Erling Smørgrav * Read a line from a file. 56*f7e6344dSDag-Erling Smørgrav */ 57*f7e6344dSDag-Erling Smørgrav 58*f7e6344dSDag-Erling Smørgrav char * 59*f7e6344dSDag-Erling Smørgrav openpam_readline(FILE *f, int *lineno, size_t *lenp) 60*f7e6344dSDag-Erling Smørgrav { 61*f7e6344dSDag-Erling Smørgrav char *line; 62*f7e6344dSDag-Erling Smørgrav size_t len, size; 63*f7e6344dSDag-Erling Smørgrav int ch; 64*f7e6344dSDag-Erling Smørgrav 65*f7e6344dSDag-Erling Smørgrav line = NULL; 66*f7e6344dSDag-Erling Smørgrav if (openpam_straddch(&line, &size, &len, 0) != 0) 67*f7e6344dSDag-Erling Smørgrav return (NULL); 68*f7e6344dSDag-Erling Smørgrav for (;;) { 69*f7e6344dSDag-Erling Smørgrav ch = fgetc(f); 70*f7e6344dSDag-Erling Smørgrav /* strip comment */ 71*f7e6344dSDag-Erling Smørgrav if (ch == '#') { 72*f7e6344dSDag-Erling Smørgrav do { 73*f7e6344dSDag-Erling Smørgrav ch = fgetc(f); 74*f7e6344dSDag-Erling Smørgrav } while (ch != EOF && ch != '\n'); 75*f7e6344dSDag-Erling Smørgrav } 76*f7e6344dSDag-Erling Smørgrav /* eof */ 77*f7e6344dSDag-Erling Smørgrav if (ch == EOF) { 78*f7e6344dSDag-Erling Smørgrav /* done */ 79*f7e6344dSDag-Erling Smørgrav break; 80*f7e6344dSDag-Erling Smørgrav } 81*f7e6344dSDag-Erling Smørgrav /* eol */ 82*f7e6344dSDag-Erling Smørgrav if (ch == '\n') { 83*f7e6344dSDag-Erling Smørgrav if (lineno != NULL) 84*f7e6344dSDag-Erling Smørgrav ++*lineno; 85*f7e6344dSDag-Erling Smørgrav /* skip blank lines */ 86*f7e6344dSDag-Erling Smørgrav if (len == 0) 87*f7e6344dSDag-Erling Smørgrav continue; 88*f7e6344dSDag-Erling Smørgrav /* continuation */ 89*f7e6344dSDag-Erling Smørgrav if (line[len - 1] == '\\') { 90*f7e6344dSDag-Erling Smørgrav line[--len] = '\0'; 91*f7e6344dSDag-Erling Smørgrav continue; 92*f7e6344dSDag-Erling Smørgrav } 93*f7e6344dSDag-Erling Smørgrav /* done */ 94*f7e6344dSDag-Erling Smørgrav break; 95*f7e6344dSDag-Erling Smørgrav } 96*f7e6344dSDag-Erling Smørgrav /* anything else */ 97*f7e6344dSDag-Erling Smørgrav if (openpam_straddch(&line, &size, &len, ch) != 0) 98*f7e6344dSDag-Erling Smørgrav goto fail; 99*f7e6344dSDag-Erling Smørgrav } 100*f7e6344dSDag-Erling Smørgrav if (len == 0) 101*f7e6344dSDag-Erling Smørgrav goto fail; 102*f7e6344dSDag-Erling Smørgrav if (lenp != NULL) 103*f7e6344dSDag-Erling Smørgrav *lenp = len; 104*f7e6344dSDag-Erling Smørgrav openpam_log(PAM_LOG_LIBDEBUG, "returning '%s'", line); 105*f7e6344dSDag-Erling Smørgrav return (line); 106*f7e6344dSDag-Erling Smørgrav fail: 107*f7e6344dSDag-Erling Smørgrav FREE(line); 108*f7e6344dSDag-Erling Smørgrav return (NULL); 109*f7e6344dSDag-Erling Smørgrav } 110*f7e6344dSDag-Erling Smørgrav 111*f7e6344dSDag-Erling Smørgrav /** 112*f7e6344dSDag-Erling Smørgrav * DEPRECATED openpam_readlinev 113*f7e6344dSDag-Erling Smørgrav * 114*f7e6344dSDag-Erling Smørgrav * The =openpam_readline function reads a line from a file, and returns it 115*f7e6344dSDag-Erling Smørgrav * in a NUL-terminated buffer allocated with =!malloc. 116*f7e6344dSDag-Erling Smørgrav * 117*f7e6344dSDag-Erling Smørgrav * The =openpam_readline function performs a certain amount of processing 118*f7e6344dSDag-Erling Smørgrav * on the data it reads: 119*f7e6344dSDag-Erling Smørgrav * 120*f7e6344dSDag-Erling Smørgrav * - Comments (introduced by a hash sign) are stripped. 121*f7e6344dSDag-Erling Smørgrav * 122*f7e6344dSDag-Erling Smørgrav * - Blank lines are ignored. 123*f7e6344dSDag-Erling Smørgrav * 124*f7e6344dSDag-Erling Smørgrav * - If a line ends in a backslash, the backslash is stripped and the 125*f7e6344dSDag-Erling Smørgrav * next line is appended. 126*f7e6344dSDag-Erling Smørgrav * 127*f7e6344dSDag-Erling Smørgrav * If =lineno is not =NULL, the integer variable it points to is 128*f7e6344dSDag-Erling Smørgrav * incremented every time a newline character is read. 129*f7e6344dSDag-Erling Smørgrav * 130*f7e6344dSDag-Erling Smørgrav * If =lenp is not =NULL, the length of the line (not including the 131*f7e6344dSDag-Erling Smørgrav * terminating NUL character) is stored in the variable it points to. 132*f7e6344dSDag-Erling Smørgrav * 133*f7e6344dSDag-Erling Smørgrav * The caller is responsible for releasing the returned buffer by passing 134*f7e6344dSDag-Erling Smørgrav * it to =!free. 135*f7e6344dSDag-Erling Smørgrav * 136*f7e6344dSDag-Erling Smørgrav * >openpam_readlinev 137*f7e6344dSDag-Erling Smørgrav * >openpam_readword 138*f7e6344dSDag-Erling Smørgrav */ 139