1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22 #include "tool_setup.h"
23
24 #ifndef HAVE_GETPASS_R
25 /* this file is only for systems without getpass_r() */
26
27 #ifdef HAVE_FCNTL_H
28 # include <fcntl.h>
29 #endif
30
31 #ifdef HAVE_TERMIOS_H
32 # include <termios.h>
33 #elif defined(HAVE_TERMIO_H)
34 # include <termio.h>
35 #endif
36
37 #ifdef __VMS
38 # include descrip
39 # include starlet
40 # include iodef
41 #endif
42
43 #ifdef WIN32
44 # include <conio.h>
45 #endif
46
47 #ifdef NETWARE
48 # ifdef __NOVELL_LIBC__
49 # include <screen.h>
50 # else
51 # include <nwconio.h>
52 # endif
53 #endif
54
55 #ifdef HAVE_UNISTD_H
56 #include <unistd.h>
57 #endif
58 #include "tool_getpass.h"
59
60 #include "memdebug.h" /* keep this as LAST include */
61
62 #ifdef __VMS
63 /* VMS implementation */
getpass_r(const char * prompt,char * buffer,size_t buflen)64 char *getpass_r(const char *prompt, char *buffer, size_t buflen)
65 {
66 long sts;
67 short chan;
68
69 /* MSK, 23-JAN-2004, iosbdef.h wasn't in VAX V7.2 or CC 6.4 */
70 /* distribution so I created this. May revert back later to */
71 /* struct _iosb iosb; */
72 struct _iosb
73 {
74 short int iosb$w_status; /* status */
75 short int iosb$w_bcnt; /* byte count */
76 int unused; /* unused */
77 } iosb;
78
79 $DESCRIPTOR(ttdesc, "TT");
80
81 buffer[0] = '\0';
82 sts = sys$assign(&ttdesc, &chan, 0, 0);
83 if(sts & 1) {
84 sts = sys$qiow(0, chan,
85 IO$_READPROMPT | IO$M_NOECHO,
86 &iosb, 0, 0, buffer, buflen, 0, 0,
87 prompt, strlen(prompt));
88
89 if((sts & 1) && (iosb.iosb$w_status & 1))
90 buffer[iosb.iosb$w_bcnt] = '\0';
91
92 sts = sys$dassgn(chan);
93 }
94 return buffer; /* we always return success */
95 }
96 #define DONE
97 #endif /* __VMS */
98
99 #ifdef __SYMBIAN32__
100 # define getch() getchar()
101 #endif
102
103 #if defined(WIN32) || defined(__SYMBIAN32__)
104
getpass_r(const char * prompt,char * buffer,size_t buflen)105 char *getpass_r(const char *prompt, char *buffer, size_t buflen)
106 {
107 size_t i;
108 fputs(prompt, stderr);
109
110 for(i = 0; i < buflen; i++) {
111 buffer[i] = (char)getch();
112 if(buffer[i] == '\r' || buffer[i] == '\n') {
113 buffer[i] = '\0';
114 break;
115 }
116 else
117 if(buffer[i] == '\b')
118 /* remove this letter and if this is not the first key, remove the
119 previous one as well */
120 i = i - (i >= 1 ? 2 : 1);
121 }
122 #ifndef __SYMBIAN32__
123 /* since echo is disabled, print a newline */
124 fputs("\n", stderr);
125 #endif
126 /* if user didn't hit ENTER, terminate buffer */
127 if(i == buflen)
128 buffer[buflen-1] = '\0';
129
130 return buffer; /* we always return success */
131 }
132 #define DONE
133 #endif /* WIN32 || __SYMBIAN32__ */
134
135 #ifdef NETWARE
136 /* NetWare implementation */
137 #ifdef __NOVELL_LIBC__
getpass_r(const char * prompt,char * buffer,size_t buflen)138 char *getpass_r(const char *prompt, char *buffer, size_t buflen)
139 {
140 return getpassword(prompt, buffer, buflen);
141 }
142 #else
getpass_r(const char * prompt,char * buffer,size_t buflen)143 char *getpass_r(const char *prompt, char *buffer, size_t buflen)
144 {
145 size_t i = 0;
146
147 printf("%s", prompt);
148 do {
149 buffer[i++] = getch();
150 if(buffer[i-1] == '\b') {
151 /* remove this letter and if this is not the first key,
152 remove the previous one as well */
153 if(i > 1) {
154 printf("\b \b");
155 i = i - 2;
156 }
157 else {
158 RingTheBell();
159 i = i - 1;
160 }
161 }
162 else if(buffer[i-1] != 13)
163 putchar('*');
164
165 } while((buffer[i-1] != 13) && (i < buflen));
166 buffer[i-1] = '\0';
167 printf("\r\n");
168 return buffer;
169 }
170 #endif /* __NOVELL_LIBC__ */
171 #define DONE
172 #endif /* NETWARE */
173
174 #ifndef DONE /* not previously provided */
175
176 #ifdef HAVE_TERMIOS_H
177 # define struct_term struct termios
178 #elif defined(HAVE_TERMIO_H)
179 # define struct_term struct termio
180 #else
181 # undef struct_term
182 #endif
183
ttyecho(bool enable,int fd)184 static bool ttyecho(bool enable, int fd)
185 {
186 #ifdef struct_term
187 static struct_term withecho;
188 static struct_term noecho;
189 #endif
190 if(!enable) {
191 /* disable echo by extracting the current 'withecho' mode and remove the
192 ECHO bit and set back the struct */
193 #ifdef HAVE_TERMIOS_H
194 tcgetattr(fd, &withecho);
195 noecho = withecho;
196 noecho.c_lflag &= ~ECHO;
197 tcsetattr(fd, TCSANOW, &noecho);
198 #elif defined(HAVE_TERMIO_H)
199 ioctl(fd, TCGETA, &withecho);
200 noecho = withecho;
201 noecho.c_lflag &= ~ECHO;
202 ioctl(fd, TCSETA, &noecho);
203 #else
204 /* neither HAVE_TERMIO_H nor HAVE_TERMIOS_H, we can't disable echo! */
205 (void)fd;
206 return FALSE; /* not disabled */
207 #endif
208 return TRUE; /* disabled */
209 }
210 else {
211 /* re-enable echo, assumes we disabled it before (and set the structs we
212 now use to reset the terminal status) */
213 #ifdef HAVE_TERMIOS_H
214 tcsetattr(fd, TCSAFLUSH, &withecho);
215 #elif defined(HAVE_TERMIO_H)
216 ioctl(fd, TCSETA, &withecho);
217 #else
218 return FALSE; /* not enabled */
219 #endif
220 return TRUE; /* enabled */
221 }
222 }
223
getpass_r(const char * prompt,char * password,size_t buflen)224 char *getpass_r(const char *prompt, /* prompt to display */
225 char *password, /* buffer to store password in */
226 size_t buflen) /* size of buffer to store password in */
227 {
228 ssize_t nread;
229 bool disabled;
230 int fd = open("/dev/tty", O_RDONLY);
231 if(-1 == fd)
232 fd = STDIN_FILENO; /* use stdin if the tty couldn't be used */
233
234 disabled = ttyecho(FALSE, fd); /* disable terminal echo */
235
236 fputs(prompt, stderr);
237 nread = read(fd, password, buflen);
238 if(nread > 0)
239 password[--nread] = '\0'; /* zero terminate where enter is stored */
240 else
241 password[0] = '\0'; /* got nothing */
242
243 if(disabled) {
244 /* if echo actually was disabled, add a newline */
245 fputs("\n", stderr);
246 (void)ttyecho(TRUE, fd); /* enable echo */
247 }
248
249 if(STDIN_FILENO != fd)
250 close(fd);
251
252 return password; /* return pointer to buffer */
253 }
254
255 #endif /* DONE */
256 #endif /* HAVE_GETPASS_R */
257