1/* 2 * Copyright (c) 1997 - 2000, 2005 Kungliga Tekniska H��gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include <config.h> 35 36#include <stdio.h> 37#include <stdlib.h> 38#include <string.h> 39#include <signal.h> 40#include <termios.h> 41#include <roken.h> 42 43#include <ui.h> 44 45static sig_atomic_t intr_flag; 46 47static void 48intr(int sig) 49{ 50 intr_flag++; 51} 52 53#ifndef NSIG 54#define NSIG 47 55#endif 56 57static int 58read_string(const char *preprompt, const char *prompt, 59 char *buf, size_t len, int echo) 60{ 61 struct sigaction sigs[NSIG]; 62 int oksigs[NSIG]; 63 struct sigaction sa; 64 FILE *tty; 65 int ret = 0; 66 int of = 0; 67 int i; 68 int c; 69 char *p; 70 71 struct termios t_new, t_old; 72 73 memset(&oksigs, 0, sizeof(oksigs)); 74 75 memset(&sa, 0, sizeof(sa)); 76 sa.sa_handler = intr; 77 sigemptyset(&sa.sa_mask); 78 sa.sa_flags = 0; 79 for(i = 1; i < sizeof(sigs) / sizeof(sigs[0]); i++) 80 if (i != SIGALRM) 81 if (sigaction(i, &sa, &sigs[i]) == 0) 82 oksigs[i] = 1; 83 84 if((tty = fopen("/dev/tty", "r")) != NULL) 85 rk_cloexec_file(tty); 86 else 87 tty = stdin; 88 89 fprintf(stderr, "%s%s", preprompt, prompt); 90 fflush(stderr); 91 92 if(echo == 0){ 93 tcgetattr(fileno(tty), &t_old); 94 memcpy(&t_new, &t_old, sizeof(t_new)); 95 t_new.c_lflag &= ~ECHO; 96 tcsetattr(fileno(tty), TCSANOW, &t_new); 97 } 98 intr_flag = 0; 99 p = buf; 100 while(intr_flag == 0){ 101 c = getc(tty); 102 if(c == EOF){ 103 if(!ferror(tty)) 104 ret = 1; 105 break; 106 } 107 if(c == '\n') 108 break; 109 if(of == 0) 110 *p++ = c; 111 of = (p == buf + len); 112 } 113 if(of) 114 p--; 115 *p = 0; 116 117 if(echo == 0){ 118 fprintf(stderr, "\n"); 119 tcsetattr(fileno(tty), TCSANOW, &t_old); 120 } 121 122 if(tty != stdin) 123 fclose(tty); 124 125 for(i = 1; i < sizeof(sigs) / sizeof(sigs[0]); i++) 126 if (oksigs[i]) 127 sigaction(i, &sigs[i], NULL); 128 129 if(ret) 130 return -3; 131 if(intr_flag) 132 return -2; 133 if(of) 134 return -1; 135 return 0; 136} 137 138int 139UI_UTIL_read_pw_string(char *buf, int length, const char *prompt, int verify) 140{ 141 int ret; 142 143 ret = read_string("", prompt, buf, length, 0); 144 if (ret) 145 return ret; 146 147 if (verify) { 148 char *buf2; 149 buf2 = malloc(length); 150 if (buf2 == NULL) 151 return 1; 152 153 ret = read_string("Verify password - ", prompt, buf2, length, 0); 154 if (ret) { 155 free(buf2); 156 return ret; 157 } 158 if (strcmp(buf2, buf) != 0) 159 ret = 1; 160 free(buf2); 161 } 162 return ret; 163} 164