diff options
Diffstat (limited to 'debian/pinentry-tqt/pinentry-tqt-1.2.1/tty/pinentry-tty.c')
| -rw-r--r-- | debian/pinentry-tqt/pinentry-tqt-1.2.1/tty/pinentry-tty.c | 612 |
1 files changed, 612 insertions, 0 deletions
diff --git a/debian/pinentry-tqt/pinentry-tqt-1.2.1/tty/pinentry-tty.c b/debian/pinentry-tqt/pinentry-tqt-1.2.1/tty/pinentry-tty.c new file mode 100644 index 00000000..c4d85c60 --- /dev/null +++ b/debian/pinentry-tqt/pinentry-tqt-1.2.1/tty/pinentry-tty.c @@ -0,0 +1,612 @@ +/* pinentry-tty.c - A minimalist dumb terminal mechanism for PIN entry + * Copyright (C) 2014 Serge Voilokov + * Copyright (C) 2015 Daniel Kahn Gillmor <dkg@fifthhorseman.net> + * Copyright (C) 2015 g10 Code GmbH + * + * This file is part of PINENTRY. + * + * PINENTRY is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * PINENTRY is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses/>. + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <signal.h> +#include <fcntl.h> +#include <unistd.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <time.h> +#include <termios.h> +#ifdef HAVE_UTIME_H +#include <utime.h> +#endif /*HAVE_UTIME_H*/ +#include <sys/types.h> +#include <sys/stat.h> +#include <ctype.h> +#include <gpg-error.h> + +#include "pinentry.h" +#include "memory.h" + +#ifndef HAVE_DOSISH_SYSTEM +static int timed_out; +#endif + +static struct termios n_term; +static struct termios o_term; + +static int +terminal_save (int fd) +{ + if ((tcgetattr (fd, &o_term)) == -1) + return -1; + return 0; +} + +static void +terminal_restore (int fd) +{ + tcsetattr (fd, TCSANOW, &o_term); +} + +static int +terminal_setup (int fd, int line_edit) +{ + n_term = o_term; + if (line_edit) + n_term.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL); + else + { + n_term.c_lflag &= ~(ECHO|ICANON); + n_term.c_lflag |= ISIG; + n_term.c_cc[VMIN] = 1; + n_term.c_cc[VTIME]= 0; + } + if ((tcsetattr(fd, TCSAFLUSH, &n_term)) == -1) + return -1; + return 1; +} + +#define UNDERLINE_START "\033[4m" +/* Bold, red. */ +#define ALERT_START "\033[1;31m" +#define NORMAL_RESTORE "\033[0m" + +static void +fputs_highlighted (char *text, char *highlight, FILE *ttyfo) +{ + for (; *text; text ++) + { + /* Skip accelerator prefix. */ + if (*text == '_') + { + text ++; + if (! *text) + break; + } + + if (text == highlight) + fputs (UNDERLINE_START, ttyfo); + fputc (*text, ttyfo); + if (text == highlight) + fputs (NORMAL_RESTORE, ttyfo); + } +} + +static char +button (char *text, char *default_text, FILE *ttyfo) +{ + char *highlight; + int use_default = 0; + + if (! text) + return 0; + + /* Skip any leading white space. */ + while (*text == ' ') + text ++; + + highlight = text; + while ((highlight = strchr (highlight, '_'))) + { + highlight = highlight + 1; + if (*highlight == '_') + { + /* Escaped underscore. Skip both characters. */ + highlight++; + continue; + } + if (!isalnum (*highlight)) + /* Unusable accelerator. */ + continue; + break; + } + + if (! highlight) + /* Not accelerator. Take the first alpha-numeric character. */ + { + highlight = text; + while (*highlight && !isalnum (*highlight)) + highlight ++; + } + + if (! *highlight) + /* Hmm, no alpha-numeric characters. */ + { + if (! default_text) + return 0; + highlight = default_text; + use_default = 1; + } + + fputs (" ", ttyfo); + fputs_highlighted (text, highlight, ttyfo); + if (use_default) + { + fputs (" (", ttyfo); + fputs_highlighted (default_text, highlight, ttyfo); + fputc (')', ttyfo); + } + fputc ('\n', ttyfo); + + return tolower (*highlight); +} + +static void +dump_error_text (FILE *ttyfo, const char *text) +{ + int lines = 0; + + if (! text || ! *text) + return; + + for (;;) + { + const char *eol = strchr (text, '\n'); + if (! eol) + eol = text + strlen (text); + + lines ++; + + fwrite ("\n *** ", 6, 1, ttyfo); + fputs (ALERT_START, ttyfo); + fwrite (text, (size_t) (eol - text), 1, ttyfo); + fputs (NORMAL_RESTORE, ttyfo); + + if (! *eol) + break; + + text = eol + 1; + } + + if (lines > 1) + fputc ('\n', ttyfo); + else + fwrite (" ***\n", 5, 1, ttyfo); + + fputc ('\n', ttyfo); +} + +static int +confirm (pinentry_t pinentry, FILE *ttyfi, FILE *ttyfo) +{ + char *msg; + char *msgbuffer = NULL; + + char ok = 0; + char notok = 0; + char cancel = 0; + + int ret; + + dump_error_text (ttyfo, pinentry->error); + + msg = pinentry->description; + if (! msg) + { + /* If there is no description, fallback to the title. */ + msg = msgbuffer = pinentry_get_title (pinentry); + } + if (! msg) + msg = "Confirm:"; + + if (msg) + { + fputs (msg, ttyfo); + fputc ('\n', ttyfo); + } + free (msgbuffer); + + fflush (ttyfo); + + if (pinentry->ok) + ok = button (pinentry->ok, "OK", ttyfo); + else if (pinentry->default_ok) + ok = button (pinentry->default_ok, "OK", ttyfo); + else + ok = button ("OK", NULL, ttyfo); + + if (! pinentry->one_button) + { + if (pinentry->cancel) + cancel = button (pinentry->cancel, "Cancel", ttyfo); + else if (pinentry->default_cancel) + cancel = button (pinentry->default_cancel, "Cancel", ttyfo); + + if (pinentry->notok) + notok = button (pinentry->notok, "No", ttyfo); + } + + while (1) + { + int input; + + if (pinentry->one_button) + fprintf (ttyfo, "Press any key to continue."); + else + { + fputc ('[', ttyfo); + if (ok) + fputc (ok, ttyfo); + if (cancel) + fputc (cancel, ttyfo); + if (notok) + fputc (notok, ttyfo); + fputs("]? ", ttyfo); + } + fflush (ttyfo); + + input = fgetc (ttyfi); + + if (input == EOF) + { + pinentry->close_button = 1; + + pinentry->canceled = 1; + +#ifndef HAVE_DOSISH_SYSTEM + if (!timed_out && errno == EINTR) + pinentry->specific_err = gpg_error (GPG_ERR_FULLY_CANCELED); +#endif + + ret = 0; + break; + } + else + { + fprintf (ttyfo, "%c\n", input); + input = tolower (input); + } + + if (pinentry->one_button) + { + ret = 1; + break; + } + + if (cancel && input == cancel) + { + pinentry->canceled = 1; + ret = 0; + break; + } + else if (notok && input == notok) + { + ret = 0; + break; + } + else if (ok && input == ok) + { + ret = 1; + break; + } + else + { + fprintf (ttyfo, "Invalid selection.\n"); + } + } + +#ifndef HAVE_DOSISH_SYSTEM + if (timed_out) + pinentry->specific_err = gpg_error (GPG_ERR_TIMEOUT); +#endif + + return ret; +} + +static char * +read_password (pinentry_t pinentry, FILE *ttyfi, FILE *ttyfo) +{ + int done = 0; + int len = 128; + int count = 0; + char *buffer; + + (void) ttyfo; + + buffer = secmem_malloc (len); + if (! buffer) + return NULL; + + while (!done) + { + int c; + + if (count == len - 1) + /* Double the buffer's size. Note: we check if count is len - + 1 and not len so that we always have space for the NUL + character. */ + { + int new_len = 2 * len; + char *tmp = secmem_realloc (buffer, new_len); + if (! tmp) + { + secmem_free (tmp); + return NULL; + } + buffer = tmp; + len = new_len; + } + + c = fgetc (ttyfi); + switch (c) + { + case EOF: + done = -1; +#ifndef HAVE_DOSISH_SYSTEM + if (!timed_out && errno == EINTR) + pinentry->specific_err = gpg_error (GPG_ERR_FULLY_CANCELED); +#endif + break; + + case '\n': + done = 1; + break; + + default: + buffer[count ++] = c; + break; + } + } + buffer[count] = '\0'; + + if (done == -1) + { + secmem_free (buffer); + return NULL; + } + + return buffer; +} + + +static int +password (pinentry_t pinentry, FILE *ttyfi, FILE *ttyfo) +{ + char *msg; + char *msgbuffer = NULL; + int done = 0; + + msg = pinentry->description; + if (! msg) + msg = msgbuffer = pinentry_get_title (pinentry); + if (! msg) + msg = "Enter your passphrase."; + + dump_error_text (ttyfo, pinentry->error); + + fprintf (ttyfo, "%s\n", msg); + free (msgbuffer); + + while (! done) + { + char *passphrase; + + char *prompt = pinentry->prompt; + if (! prompt || !*prompt) + prompt = "PIN"; + + fprintf (ttyfo, "%s%s ", + prompt, + /* Make sure the prompt ends in a : or a question mark. */ + (prompt[strlen(prompt) - 1] == ':' + || prompt[strlen(prompt) - 1] == '?') ? "" : ":"); + fflush (ttyfo); + + passphrase = read_password (pinentry, ttyfi, ttyfo); + fputc ('\n', ttyfo); + if (! passphrase) + { + done = -1; + break; + } + + if (! pinentry->repeat_passphrase) + done = 1; + else + { + char *passphrase2; + + prompt = pinentry->repeat_passphrase; + fprintf (ttyfo, "%s%s ", + prompt, + /* Make sure the prompt ends in a : or a question mark. */ + (prompt[strlen(prompt) - 1] == ':' + || prompt[strlen(prompt) - 1] == '?') ? "" : ":"); + fflush (ttyfo); + + passphrase2 = read_password (pinentry, ttyfi, ttyfo); + fputc ('\n', ttyfo); + if (! passphrase2) + { + done = -1; + break; + } + + if (strcmp (passphrase, passphrase2) == 0) + { + pinentry->repeat_okay = 1; + done = 1; + } + else + dump_error_text (ttyfo, + pinentry->repeat_error_string + ?: "Passphrases don't match."); + + secmem_free (passphrase2); + } + + if (done == 1) + pinentry_setbuffer_use (pinentry, passphrase, 0); + else + secmem_free (passphrase); + } + +#ifndef HAVE_DOSISH_SYSTEM + if (timed_out) + pinentry->specific_err = gpg_error (GPG_ERR_TIMEOUT); +#endif + + return done; +} + + +/* If a touch has been registered, touch that file. */ +static void +do_touch_file(pinentry_t pinentry) +{ +#ifdef HAVE_UTIME_H + struct stat st; + time_t tim; + + if (!pinentry->touch_file || !*pinentry->touch_file) + return; + + if (stat(pinentry->touch_file, &st)) + return; /* Oops. */ + + /* Make sure that we actually update the mtime. */ + while ((tim = time(NULL)) == st.st_mtime) + sleep(1); + + /* Update but ignore errors as we can't do anything in that case. + Printing error messages may even clubber the display further. */ + utime (pinentry->touch_file, NULL); +#endif /*HAVE_UTIME_H*/ +} + +#ifndef HAVE_DOSISH_SYSTEM +static void +catchsig (int sig) +{ + if (sig == SIGALRM) + timed_out = 1; +} +#endif + +int +tty_cmd_handler (pinentry_t pinentry) +{ + int rc = 0; + FILE *ttyfi = stdin; + FILE *ttyfo = stdout; + int saved_errno = 0; + +#ifndef HAVE_DOSISH_SYSTEM + timed_out = 0; + + if (pinentry->timeout) + { + struct sigaction sa; + + memset (&sa, 0, sizeof(sa)); + sa.sa_handler = catchsig; + sigaction (SIGALRM, &sa, NULL); + sigaction (SIGINT, &sa, NULL); + alarm (pinentry->timeout); + } +#endif + + if (pinentry->ttyname) + { + ttyfi = fopen (pinentry->ttyname, "r"); + if (!ttyfi) + return -1; + + ttyfo = fopen (pinentry->ttyname, "w"); + if (!ttyfo) + { + saved_errno = errno; + fclose (ttyfi); + errno = saved_errno; + return -1; + } + } + + if (terminal_save (fileno (ttyfi)) < 0) + rc = -1; + else + { + if (terminal_setup (fileno (ttyfi), !!pinentry->pin) == -1) + { + saved_errno = errno; + fprintf (stderr, "terminal_setup failure, exiting\n"); + rc = -1; + } + else + { + if (pinentry->pin) + rc = password (pinentry, ttyfi, ttyfo); + else + rc = confirm (pinentry, ttyfi, ttyfo); + + terminal_restore (fileno (ttyfi)); + do_touch_file (pinentry); + } + } + + if (pinentry->ttyname) + { + fclose (ttyfi); + fclose (ttyfo); + } + + if (saved_errno) + errno = saved_errno; + + return rc; +} + + +pinentry_cmd_handler_t pinentry_cmd_handler = tty_cmd_handler; + + + +int +main (int argc, char *argv[]) +{ + pinentry_init ("pinentry-tty"); + + /* Consumes all arguments. */ + pinentry_parse_opts(argc, argv); + + if (pinentry_loop ()) + return 1; + + return 0; +} |