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