OpenSolaris Launch

1 files changed, 132 insertions, 0 deletions

diff --git a/usr/src/cmd/ssh/libssh/common/readpass.c b/usr/src/cmd/ssh/libssh/common/readpass.c
new file mode 100644
index 0000000000..8e7fd9e239
--- /dev/null
+++ b/usr/src/cmd/ssh/libssh/common/readpass.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2001 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: readpass.c,v 1.27 2002/03/26 15:58:46 markus Exp $");
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include "xmalloc.h"
+#include "readpass.h"
+#include "pathnames.h"
+#include "log.h"
+#include "ssh.h"
+
+static char *
+ssh_askpass(char *askpass, const char *msg)
+{
+	pid_t pid;
+	size_t len;
+	char *pass;
+	int p[2], status, ret;
+	char buf[1024];
+
+	if (fflush(stdout) != 0)
+		error("ssh_askpass: fflush: %s", strerror(errno));
+	if (askpass == NULL)
+		fatal("internal error: askpass undefined");
+	if (pipe(p) < 0) {
+		error("ssh_askpass: pipe: %s", strerror(errno));
+		return xstrdup("");
+	}
+	if ((pid = fork()) < 0) {
+		error("ssh_askpass: fork: %s", strerror(errno));
+		return xstrdup("");
+	}
+	if (pid == 0) {
+		seteuid(getuid());
+		setuid(getuid());
+		close(p[0]);
+		if (dup2(p[1], STDOUT_FILENO) < 0)
+			fatal("ssh_askpass: dup2: %s", strerror(errno));
+		execlp(askpass, askpass, msg, (char *) 0);
+		fatal("ssh_askpass: exec(%s): %s", askpass, strerror(errno));
+	}
+	close(p[1]);
+
+	len = ret = 0;
+	do {
+		ret = read(p[0], buf + len, sizeof(buf) - 1 - len);
+		if (ret == -1 && errno == EINTR)
+			continue;
+		if (ret <= 0)
+			break;
+		len += ret;
+	} while (sizeof(buf) - 1 - len > 0);
+	buf[len] = '\0';
+
+	close(p[0]);
+	while (waitpid(pid, &status, 0) < 0)
+		if (errno != EINTR)
+			break;
+
+	buf[strcspn(buf, "\r\n")] = '\0';
+	pass = xstrdup(buf);
+	memset(buf, 0, sizeof(buf));
+	return pass;
+}
+
+/*
+ * Reads a passphrase from /dev/tty with echo turned off/on.  Returns the
+ * passphrase (allocated with xmalloc).  Exits if EOF is encountered. If
+ * RP_ALLOW_STDIN is set, the passphrase will be read from stdin if no
+ * tty is available
+ */
+char *
+read_passphrase(const char *prompt, int flags)
+{
+	char *askpass = NULL, *ret, buf[1024];
+	int rppflags, use_askpass = 0, ttyfd;
+
+	rppflags = (flags & RP_ECHO) ? RPP_ECHO_ON : RPP_ECHO_OFF;
+	if (flags & RP_ALLOW_STDIN) {
+		if (!isatty(STDIN_FILENO))
+			use_askpass = 1;
+	} else {
+		rppflags |= RPP_REQUIRE_TTY;
+		ttyfd = open(_PATH_TTY, O_RDWR);
+		if (ttyfd >= 0)
+			close(ttyfd);
+		else
+			use_askpass = 1;
+	}
+
+	if (use_askpass && getenv("DISPLAY")) {
+		if (getenv(SSH_ASKPASS_ENV))
+			askpass = getenv(SSH_ASKPASS_ENV);
+		else
+			askpass = _PATH_SSH_ASKPASS_DEFAULT;
+		return ssh_askpass(askpass, prompt);
+	}
+
+	if (readpassphrase(prompt, buf, sizeof buf, rppflags) == NULL) {
+		if (flags & RP_ALLOW_EOF)
+			return NULL;
+		return xstrdup("");
+	}
+
+	ret = xstrdup(buf);
+	memset(buf, 'x', sizeof buf);
+	return ret;
+}