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ui_openssl.c

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1/* $OpenBSD: ui_openssl.c,v 1.25 2015/09/10 15:56:26 jsing Exp $ */-
2/* Written by Richard Levitte (richard@levitte.org) and others-
3 * for the OpenSSL project 2001.-
4 */-
5/* ====================================================================-
6 * Copyright (c) 2001 The OpenSSL Project. All rights reserved.-
7 *-
8 * Redistribution and use in source and binary forms, with or without-
9 * modification, are permitted provided that the following conditions-
10 * are met:-
11 *-
12 * 1. Redistributions of source code must retain the above copyright-
13 * notice, this list of conditions and the following disclaimer.-
14 *-
15 * 2. Redistributions in binary form must reproduce the above copyright-
16 * notice, this list of conditions and the following disclaimer in-
17 * the documentation and/or other materials provided with the-
18 * distribution.-
19 *-
20 * 3. All advertising materials mentioning features or use of this-
21 * software must display the following acknowledgment:-
22 * "This product includes software developed by the OpenSSL Project-
23 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"-
24 *-
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to-
26 * endorse or promote products derived from this software without-
27 * prior written permission. For written permission, please contact-
28 * openssl-core@openssl.org.-
29 *-
30 * 5. Products derived from this software may not be called "OpenSSL"-
31 * nor may "OpenSSL" appear in their names without prior written-
32 * permission of the OpenSSL Project.-
33 *-
34 * 6. Redistributions of any form whatsoever must retain the following-
35 * acknowledgment:-
36 * "This product includes software developed by the OpenSSL Project-
37 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"-
38 *-
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY-
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE-
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR-
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR-
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,-
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;-
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)-
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,-
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)-
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED-
50 * OF THE POSSIBILITY OF SUCH DAMAGE.-
51 * ====================================================================-
52 *-
53 * This product includes cryptographic software written by Eric Young-
54 * (eay@cryptsoft.com). This product includes software written by Tim-
55 * Hudson (tjh@cryptsoft.com).-
56 *-
57 */-
58-
59/* The lowest level part of this file was previously in crypto/des/read_pwd.c,-
60 * Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)-
61 * All rights reserved.-
62 *-
63 * This package is an SSL implementation written-
64 * by Eric Young (eay@cryptsoft.com).-
65 * The implementation was written so as to conform with Netscapes SSL.-
66 *-
67 * This library is free for commercial and non-commercial use as long as-
68 * the following conditions are aheared to. The following conditions-
69 * apply to all code found in this distribution, be it the RC4, RSA,-
70 * lhash, DES, etc., code; not just the SSL code. The SSL documentation-
71 * included with this distribution is covered by the same copyright terms-
72 * except that the holder is Tim Hudson (tjh@cryptsoft.com).-
73 *-
74 * Copyright remains Eric Young's, and as such any Copyright notices in-
75 * the code are not to be removed.-
76 * If this package is used in a product, Eric Young should be given attribution-
77 * as the author of the parts of the library used.-
78 * This can be in the form of a textual message at program startup or-
79 * in documentation (online or textual) provided with the package.-
80 *-
81 * Redistribution and use in source and binary forms, with or without-
82 * modification, are permitted provided that the following conditions-
83 * are met:-
84 * 1. Redistributions of source code must retain the copyright-
85 * notice, this list of conditions and the following disclaimer.-
86 * 2. Redistributions in binary form must reproduce the above copyright-
87 * notice, this list of conditions and the following disclaimer in the-
88 * documentation and/or other materials provided with the distribution.-
89 * 3. All advertising materials mentioning features or use of this software-
90 * must display the following acknowledgement:-
91 * "This product includes cryptographic software written by-
92 * Eric Young (eay@cryptsoft.com)"-
93 * The word 'cryptographic' can be left out if the rouines from the library-
94 * being used are not cryptographic related :-).-
95 * 4. If you include any Windows specific code (or a derivative thereof) from-
96 * the apps directory (application code) you must include an acknowledgement:-
97 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"-
98 *-
99 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND-
100 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE-
101 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE-
102 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE-
103 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL-
104 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS-
105 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)-
106 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT-
107 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY-
108 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF-
109 * SUCH DAMAGE.-
110 *-
111 * The licence and distribution terms for any publically available version or-
112 * derivative of this code cannot be changed. i.e. this code cannot simply be-
113 * copied and put under another distribution licence-
114 * [including the GNU Public Licence.]-
115 */-
116-
117#include <sys/ioctl.h>-
118-
119#include <openssl/opensslconf.h>-
120-
121#include <errno.h>-
122#include <signal.h>-
123#include <stdio.h>-
124#include <string.h>-
125#include <termios.h>-
126#include <unistd.h>-
127-
128#include "ui_locl.h"-
129-
130#ifndef NX509_SIG-
131#define NX509_SIG 32-
132#endif-
133-
134/* Define globals. They are protected by a lock */-
135static struct sigaction savsig[NX509_SIG];-
136-
137static struct termios tty_orig;-
138static FILE *tty_in, *tty_out;-
139static int is_a_tty;-
140-
141/* Declare static functions */-
142static int read_till_nl(FILE *);-
143static void recsig(int);-
144static void pushsig(void);-
145static void popsig(void);-
146static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);-
147-
148static int read_string(UI *ui, UI_STRING *uis);-
149static int write_string(UI *ui, UI_STRING *uis);-
150-
151static int open_console(UI *ui);-
152static int echo_console(UI *ui);-
153static int noecho_console(UI *ui);-
154static int close_console(UI *ui);-
155-
156static UI_METHOD ui_openssl = {-
157 .name = "OpenSSL default user interface",-
158 .ui_open_session = open_console,-
159 .ui_write_string = write_string,-
160 .ui_read_string = read_string,-
161 .ui_close_session = close_console,-
162};-
163-
164/* The method with all the built-in thingies */-
165UI_METHOD *-
166UI_OpenSSL(void)-
167{-
168 return &ui_openssl;
never executed: return &ui_openssl;
0
169}-
170-
171/* The following function makes sure that info and error strings are printed-
172 before any prompt. */-
173static int-
174write_string(UI *ui, UI_STRING *uis)-
175{-
176 switch (UI_get_string_type(uis)) {-
177 case UIT_ERROR:
never executed: case UIT_ERROR:
0
178 case UIT_INFO:
never executed: case UIT_INFO:
0
179 fputs(UI_get0_output_string(uis), tty_out);-
180 fflush(tty_out);-
181 break;
never executed: break;
0
182 default:
never executed: default:
0
183 break;
never executed: break;
0
184 }-
185 return 1;
never executed: return 1;
0
186}-
187-
188static int-
189read_string(UI *ui, UI_STRING *uis)-
190{-
191 int ok = 0;-
192-
193 switch (UI_get_string_type(uis)) {-
194 case UIT_BOOLEAN:
never executed: case UIT_BOOLEAN:
0
195 fputs(UI_get0_output_string(uis), tty_out);-
196 fputs(UI_get0_action_string(uis), tty_out);-
197 fflush(tty_out);-
198 return read_string_inner(ui, uis,
never executed: return read_string_inner(ui, uis, UI_get_input_flags(uis) & 0x01, 0);
0
199 UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0);
never executed: return read_string_inner(ui, uis, UI_get_input_flags(uis) & 0x01, 0);
0
200 case UIT_PROMPT:
never executed: case UIT_PROMPT:
0
201 fputs(UI_get0_output_string(uis), tty_out);-
202 fflush(tty_out);-
203 return read_string_inner(ui, uis,
never executed: return read_string_inner(ui, uis, UI_get_input_flags(uis) & 0x01, 1);
0
204 UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1);
never executed: return read_string_inner(ui, uis, UI_get_input_flags(uis) & 0x01, 1);
0
205 case UIT_VERIFY:
never executed: case UIT_VERIFY:
0
206 fprintf(tty_out, "Verifying - %s",-
207 UI_get0_output_string(uis));-
208 fflush(tty_out);-
209 if ((ok = read_string_inner(ui, uis, UI_get_input_flags(uis) &
(ok = read_str...0x01, 1)) <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
210 UI_INPUT_FLAG_ECHO, 1)) <= 0)
(ok = read_str...0x01, 1)) <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
211 return ok;
never executed: return ok;
0
212 if (strcmp(UI_get0_result_string(uis),
never executed: __result = (((const unsigned char *) (const char *) ( UI_get0_result_string(uis) ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
never executed: __result = (((const unsigned char *) (const char *) ( UI_get0_test_string(uis) ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
__extension__ ... )))); }) != 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
213 UI_get0_test_string(uis)) != 0) {
__extension__ ... )))); }) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
214 fprintf(tty_out, "Verify failure\n");-
215 fflush(tty_out);-
216 return 0;
never executed: return 0;
0
217 }-
218 break;
never executed: break;
0
219 default:
never executed: default:
0
220 break;
never executed: break;
0
221 }-
222 return 1;
never executed: return 1;
0
223}-
224-
225-
226/* Internal functions to read a string without echoing */-
227static int-
228read_till_nl(FILE *in)-
229{-
230#define SIZE 4-
231 char buf[SIZE + 1];-
232-
233 do {-
234 if (!fgets(buf, SIZE, in))
!fgets(buf, 4, in)Description
TRUEnever evaluated
FALSEnever evaluated
0
235 return 0;
never executed: return 0;
0
236 } while (strchr(buf, '\n') == NULL);
never executed: end of block
(__extension__...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
__builtin_constant_p ( '\n' )Description
TRUEnever evaluated
FALSEnever evaluated
!__builtin_constant_p ( buf )Description
TRUEnever evaluated
FALSEnever evaluated
( '\n' ) == '\0'Description
TRUEnever evaluated
FALSEnever evaluated
0
237 return 1;
never executed: return 1;
0
238}-
239-
240static volatile sig_atomic_t intr_signal;-
241-
242static int-
243read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)-
244{-
245 static int ps;-
246 int ok;-
247 char result[BUFSIZ];-
248 int maxsize = BUFSIZ - 1;-
249 char *p;-
250-
251 intr_signal = 0;-
252 ok = 0;-
253 ps = 0;-
254-
255 pushsig();-
256 ps = 1;-
257-
258 if (!echo && !noecho_console(ui))
!echoDescription
TRUEnever evaluated
FALSEnever evaluated
!noecho_console(ui)Description
TRUEnever evaluated
FALSEnever evaluated
0
259 goto error;
never executed: goto error;
0
260 ps = 2;-
261-
262 result[0] = '\0';-
263 p = fgets(result, maxsize, tty_in);-
264 if (!p)
!pDescription
TRUEnever evaluated
FALSEnever evaluated
0
265 goto error;
never executed: goto error;
0
266 if (feof(tty_in))
feof(tty_in)Description
TRUEnever evaluated
FALSEnever evaluated
0
267 goto error;
never executed: goto error;
0
268 if (ferror(tty_in))
ferror(tty_in)Description
TRUEnever evaluated
FALSEnever evaluated
0
269 goto error;
never executed: goto error;
0
270 if ((p = strchr(result, '\n')) != NULL) {
(p = (__extens...!= ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
__builtin_constant_p ( '\n' )Description
TRUEnever evaluated
FALSEnever evaluated
!__builtin_con...t_p ( result )Description
TRUEnever evaluated
FALSEnever evaluated
( '\n' ) == '\0'Description
TRUEnever evaluated
FALSEnever evaluated
0
271 if (strip_nl)
strip_nlDescription
TRUEnever evaluated
FALSEnever evaluated
0
272 *p = '\0';
never executed: *p = '\0';
0
273 } else if (!read_till_nl(tty_in))
never executed: end of block
!read_till_nl(tty_in)Description
TRUEnever evaluated
FALSEnever evaluated
0
274 goto error;
never executed: goto error;
0
275 if (UI_set_result(ui, uis, result) >= 0)
UI_set_result(..., result) >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
276 ok = 1;
never executed: ok = 1;
0
277-
278error:
code before this statement never executed: error:
0
279 if (intr_signal == SIGINT)
intr_signal == 2Description
TRUEnever evaluated
FALSEnever evaluated
0
280 ok = -1;
never executed: ok = -1;
0
281 if (!echo)
!echoDescription
TRUEnever evaluated
FALSEnever evaluated
0
282 fprintf(tty_out, "\n");
never executed: fprintf(tty_out, "\n");
0
283 if (ps >= 2 && !echo && !echo_console(ui))
ps >= 2Description
TRUEnever evaluated
FALSEnever evaluated
!echoDescription
TRUEnever evaluated
FALSEnever evaluated
!echo_console(ui)Description
TRUEnever evaluated
FALSEnever evaluated
0
284 ok = 0;
never executed: ok = 0;
0
285-
286 if (ps >= 1)
ps >= 1Description
TRUEnever evaluated
FALSEnever evaluated
0
287 popsig();
never executed: popsig();
0
288-
289 explicit_bzero(result, BUFSIZ);-
290 return ok;
never executed: return ok;
0
291}-
292-
293-
294/* Internal functions to open, handle and close a channel to the console. */-
295static int-
296open_console(UI *ui)-
297{-
298 CRYPTO_w_lock(CRYPTO_LOCK_UI);-
299 is_a_tty = 1;-
300-
301#define DEV_TTY "/dev/tty"-
302 if ((tty_in = fopen(DEV_TTY, "r")) == NULL)
(tty_in = fope...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
303 tty_in = stdin;
never executed: tty_in = stdin ;
0
304 if ((tty_out = fopen(DEV_TTY, "w")) == NULL)
(tty_out = fop...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
305 tty_out = stderr;
never executed: tty_out = stderr ;
0
306-
307 if (tcgetattr(fileno(tty_in), &tty_orig) == -1) {
tcgetattr(file...ty_orig) == -1Description
TRUEnever evaluated
FALSEnever evaluated
0
308 if (errno == ENOTTY)
(*__errno_location ()) == 25Description
TRUEnever evaluated
FALSEnever evaluated
0
309 is_a_tty = 0;
never executed: is_a_tty = 0;
0
310 else-
311 /*-
312 * Ariel Glenn ariel@columbia.edu reports that-
313 * solaris can return EINVAL instead. This should be-
314 * ok-
315 */-
316 if (errno == EINVAL)
(*__errno_location ()) == 22Description
TRUEnever evaluated
FALSEnever evaluated
0
317 is_a_tty = 0;
never executed: is_a_tty = 0;
0
318 else-
319 return 0;
never executed: return 0;
0
320 }-
321-
322 return 1;
never executed: return 1;
0
323}-
324-
325static int-
326noecho_console(UI *ui)-
327{-
328 struct termios tty_new = tty_orig;-
329-
330 tty_new.c_lflag &= ~ECHO;-
331 if (is_a_tty && (tcsetattr(fileno(tty_in), TCSANOW, &tty_new) == -1))
is_a_ttyDescription
TRUEnever evaluated
FALSEnever evaluated
(tcsetattr(fil...ty_new) == -1)Description
TRUEnever evaluated
FALSEnever evaluated
0
332 return 0;
never executed: return 0;
0
333 return 1;
never executed: return 1;
0
334}-
335-
336static int-
337echo_console(UI *ui)-
338{-
339 if (is_a_tty && (tcsetattr(fileno(tty_in), TCSANOW, &tty_orig) == -1))
is_a_ttyDescription
TRUEnever evaluated
FALSEnever evaluated
(tcsetattr(fil...y_orig) == -1)Description
TRUEnever evaluated
FALSEnever evaluated
0
340 return 0;
never executed: return 0;
0
341 return 1;
never executed: return 1;
0
342}-
343-
344static int-
345close_console(UI *ui)-
346{-
347 if (tty_in != stdin)
tty_in != stdinDescription
TRUEnever evaluated
FALSEnever evaluated
0
348 fclose(tty_in);
never executed: fclose(tty_in);
0
349 if (tty_out != stderr)
tty_out != stderrDescription
TRUEnever evaluated
FALSEnever evaluated
0
350 fclose(tty_out);
never executed: fclose(tty_out);
0
351 CRYPTO_w_unlock(CRYPTO_LOCK_UI);-
352-
353 return 1;
never executed: return 1;
0
354}-
355-
356-
357/* Internal functions to handle signals and act on them */-
358static void-
359pushsig(void)-
360{-
361 int i;-
362 struct sigaction sa;-
363-
364 memset(&sa, 0, sizeof sa);-
365 sa.sa_handler = recsig;-
366-
367 for (i = 1; i < NX509_SIG; i++) {
i < 32Description
TRUEnever evaluated
FALSEnever evaluated
0
368 if (i == SIGUSR1)
i == 10Description
TRUEnever evaluated
FALSEnever evaluated
0
369 continue;
never executed: continue;
0
370 if (i == SIGUSR2)
i == 12Description
TRUEnever evaluated
FALSEnever evaluated
0
371 continue;
never executed: continue;
0
372 if (i == SIGKILL) /* We can't make any action on that. */
i == 9Description
TRUEnever evaluated
FALSEnever evaluated
0
373 continue;
never executed: continue;
0
374 sigaction(i, &sa, &savsig[i]);-
375 }
never executed: end of block
0
376-
377 signal(SIGWINCH, SIG_DFL);-
378}
never executed: end of block
0
379-
380static void-
381popsig(void)-
382{-
383 int i;-
384 for (i = 1; i < NX509_SIG; i++) {
i < 32Description
TRUEnever evaluated
FALSEnever evaluated
0
385 if (i == SIGUSR1)
i == 10Description
TRUEnever evaluated
FALSEnever evaluated
0
386 continue;
never executed: continue;
0
387 if (i == SIGUSR2)
i == 12Description
TRUEnever evaluated
FALSEnever evaluated
0
388 continue;
never executed: continue;
0
389 sigaction(i, &savsig[i], NULL);-
390 }
never executed: end of block
0
391}
never executed: end of block
0
392-
393static void-
394recsig(int i)-
395{-
396 intr_signal = i;-
397}
never executed: end of block
0
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