1 files changed, 136 insertions, 0 deletions
diff --git a/lib/libc/gen/readpassphrase.c b/lib/libc/gen/readpassphrase.c
new file mode 100644
index 0000000..2f70232
--- /dev/null
+++ b/lib/libc/gen/readpassphrase.c
@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2000 Todd C. Miller <Todd.Miller@courtesan.com>
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static const char rcsid[] = "$OpenBSD: readpassphrase.c,v 1.7 2001/08/07 19:34:11 millert Exp $";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "namespace.h"
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <pwd.h>
+#include <signal.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+#include <readpassphrase.h>
+#include "un-namespace.h"
+
+char *
+readpassphrase(prompt, buf, bufsiz, flags)
+	const char *prompt;
+	char *buf;
+	size_t bufsiz;
+	int flags;
+{
+	struct termios term, oterm;
+	char ch, *p, *end;
+	int input, output;
+	sigset_t oset, nset;
+
+	/* I suppose we could alloc on demand in this case (XXX). */
+	if (bufsiz == 0) {
+		errno = EINVAL;
+		return(NULL);
+	}
+
+	/*
+	 * Read and write to /dev/tty if available.  If not, read from
+	 * stdin and write to stderr unless a tty is required.
+	 */
+	if ((input = output = _open(_PATH_TTY, O_RDWR)) == -1) {
+		if (flags & RPP_REQUIRE_TTY) {
+			errno = ENOTTY;
+			return(NULL);
+		}
+		input = STDIN_FILENO;
+		output = STDERR_FILENO;
+	}
+
+	/*
+	 * We block SIGINT and SIGTSTP so the terminal is not left
+	 * in an inconsistent state (ie: no echo).  It would probably
+	 * be better to simply catch these though.
+	 */
+	sigemptyset(&nset);
+	sigaddset(&nset, SIGINT);
+	sigaddset(&nset, SIGTSTP);
+	(void)_sigprocmask(SIG_BLOCK, &nset, &oset);
+
+	/* Turn off echo if possible. */
+	if (tcgetattr(input, &oterm) == 0) {
+		memcpy(&term, &oterm, sizeof(term));
+		if (!(flags & RPP_ECHO_ON) && (term.c_lflag & ECHO))
+			term.c_lflag &= ~ECHO;
+		if (term.c_cc[VSTATUS] != _POSIX_VDISABLE)
+			term.c_cc[VSTATUS] = _POSIX_VDISABLE;
+		(void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &term);
+	} else {
+		memset(&term, 0, sizeof(term));
+		memset(&oterm, 0, sizeof(oterm));
+	}
+
+	(void)_write(output, prompt, strlen(prompt));
+	end = buf + bufsiz - 1;
+	for (p = buf; _read(input, &ch, 1) == 1 && ch != '\n' && ch != '\r';) {
+		if (p < end) {
+			if ((flags & RPP_SEVENBIT))
+				ch &= 0x7f;
+			if (isalpha(ch)) {
+				if ((flags & RPP_FORCELOWER))
+					ch = tolower(ch);
+				if ((flags & RPP_FORCEUPPER))
+					ch = toupper(ch);
+			}
+			*p++ = ch;
+		}
+	}
+	*p = '\0';
+	if (!(term.c_lflag & ECHO))
+		(void)_write(output, "\n", 1);
+
+	/* Restore old terminal settings and signal mask. */
+	if (memcmp(&term, &oterm, sizeof(term)) != 0)
+		(void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &oterm);
+	(void)_sigprocmask(SIG_SETMASK, &oset, NULL);
+	if (input != STDIN_FILENO)
+		(void)_close(input);
+	return(buf);
+}
+
+char *
+getpass(prompt)
+        const char *prompt;
+{
+	static char buf[_PASSWORD_LEN + 1];
+
+	return(readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF));
+}