diff options
Diffstat (limited to 'crypto/openssh/cli.c')
| -rw-r--r-- | crypto/openssh/cli.c | 231 |
1 files changed, 0 insertions, 231 deletions
diff --git a/crypto/openssh/cli.c b/crypto/openssh/cli.c deleted file mode 100644 index 8f0b2b8..0000000 --- a/crypto/openssh/cli.c +++ /dev/null @@ -1,231 +0,0 @@ -/* $OpenBSD: cli.c,v 1.11 2001/03/06 00:33:04 deraadt Exp $ */ - -/* - * Copyright (c) 2000 Markus Friedl. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "includes.h" -RCSID("$OpenBSD: cli.c,v 1.11 2001/03/06 00:33:04 deraadt Exp $"); - -#include "xmalloc.h" -#include "log.h" -#include "cli.h" - -#include <vis.h> - -static int cli_input = -1; -static int cli_output = -1; -static int cli_from_stdin = 0; - -sigset_t oset; -sigset_t nset; -struct sigaction nsa; -struct sigaction osa; -struct termios ntio; -struct termios otio; -int echo_modified; - -volatile int intr; - -static int -cli_open(int from_stdin) -{ - if (cli_input >= 0 && cli_output >= 0 && cli_from_stdin == from_stdin) - return 1; - - if (from_stdin) { - if (!cli_from_stdin && cli_input >= 0) { - (void)close(cli_input); - } - cli_input = STDIN_FILENO; - cli_output = STDERR_FILENO; - } else { - cli_input = cli_output = open(_PATH_TTY, O_RDWR); - if (cli_input < 0) - fatal("You have no controlling tty. Cannot read passphrase."); - } - - cli_from_stdin = from_stdin; - - return cli_input >= 0 && cli_output >= 0 && cli_from_stdin == from_stdin; -} - -static void -cli_close(void) -{ - if (!cli_from_stdin && cli_input >= 0) - close(cli_input); - cli_input = -1; - cli_output = -1; - cli_from_stdin = 0; - return; -} - -void -intrcatch(int sig) -{ - intr = 1; -} - -static void -cli_echo_disable(void) -{ - sigemptyset(&nset); - sigaddset(&nset, SIGTSTP); - (void) sigprocmask(SIG_BLOCK, &nset, &oset); - - intr = 0; - - memset(&nsa, 0, sizeof(nsa)); - nsa.sa_handler = intrcatch; - (void) sigaction(SIGINT, &nsa, &osa); - - echo_modified = 0; - if (tcgetattr(cli_input, &otio) == 0 && (otio.c_lflag & ECHO)) { - echo_modified = 1; - ntio = otio; - ntio.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL); - (void) tcsetattr(cli_input, TCSANOW, &ntio); - } - return; -} - -static void -cli_echo_restore(void) -{ - if (echo_modified != 0) { - tcsetattr(cli_input, TCSANOW, &otio); - echo_modified = 0; - } - - (void) sigprocmask(SIG_SETMASK, &oset, NULL); - (void) sigaction(SIGINT, &osa, NULL); - - if (intr != 0) { - kill(getpid(), SIGINT); - sigemptyset(&nset); - /* XXX tty has not neccessarily drained by now? */ - sigsuspend(&nset); - intr = 0; - } - return; -} - -static int -cli_read(char* buf, int size, int echo) -{ - char ch = 0; - int i = 0; - int n; - - if (!echo) - cli_echo_disable(); - - while (ch != '\n') { - n = read(cli_input, &ch, 1); - if (n == -1 && (errno == EAGAIN || errno == EINTR)) - continue; - if (n != 1) - break; - if (ch == '\n' || intr != 0) - break; - if (i < size) - buf[i++] = ch; - } - buf[i] = '\0'; - - if (!echo) - cli_echo_restore(); - if (!intr && !echo) - (void) write(cli_output, "\n", 1); - return i; -} - -static int -cli_write(char* buf, int size) -{ - int i, len, pos, ret = 0; - char *output, *p; - - output = xmalloc(4*size); - for (p = output, i = 0; i < size; i++) { - if (buf[i] == '\n' || buf[i] == '\r') - *p++ = buf[i]; - else - p = vis(p, buf[i], 0, 0); - } - len = p - output; - - for (pos = 0; pos < len; pos += ret) { - ret = write(cli_output, output + pos, len - pos); - if (ret == -1) { - xfree(output); - return -1; - } - } - xfree(output); - return 0; -} - -/* - * Presents a prompt and returns the response allocated with xmalloc(). - * Uses /dev/tty or stdin/out depending on arg. Optionally disables echo - * of response depending on arg. Tries to ensure that no other userland - * buffer is storing the response. - */ -char* -cli_read_passphrase(char* prompt, int from_stdin, int echo_enable) -{ - char buf[BUFSIZ]; - char* p; - - if (!cli_open(from_stdin)) - fatal("Cannot read passphrase."); - - fflush(stdout); - - cli_write(prompt, strlen(prompt)); - cli_read(buf, sizeof buf, echo_enable); - - cli_close(); - - p = xstrdup(buf); - memset(buf, 0, sizeof(buf)); - return (p); -} - -char* -cli_prompt(char* prompt, int echo_enable) -{ - return cli_read_passphrase(prompt, 0, echo_enable); -} - -void -cli_mesg(char* mesg) -{ - cli_open(0); - cli_write(mesg, strlen(mesg)); - cli_write("\n", strlen("\n")); - cli_close(); - return; -} |
