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authorBen Lindstrom <mouring@eviladmin.org>2001-04-19 20:33:07 +0000
committerBen Lindstrom <mouring@eviladmin.org>2001-04-19 20:33:07 +0000
commit5eb97b6f3d878e6b40cfa73a18bacc293ea6b1ad (patch)
tree44f6ee7e020d9ac349256c6d4538734b4162bc5a /readpass.c
parentf73e05eca801c3a3488caa3b6bf1585ab7e2c13a (diff)
- markus@cvs.openbsd.org 2001/04/18 21:57:42
[readpass.c ssh-add.c] call askpass from ssh, too, based on work by roth@feep.net, ok deraadt
Diffstat (limited to 'readpass.c')
-rw-r--r--readpass.c71
1 files changed, 70 insertions, 1 deletions
diff --git a/readpass.c b/readpass.c
index 3d73af74..b93eaba4 100644
--- a/readpass.c
+++ b/readpass.c
@@ -32,11 +32,58 @@
*/
#include "includes.h"
-RCSID("$OpenBSD: readpass.c,v 1.14 2001/02/08 19:30:52 itojun Exp $");
+RCSID("$OpenBSD: readpass.c,v 1.15 2001/04/18 21:57:41 markus Exp $");
#include "xmalloc.h"
#include "cli.h"
#include "readpass.h"
+#include "pathnames.h"
+#include "log.h"
+#include "atomicio.h"
+#include "ssh.h"
+
+char *
+ssh_askpass(char *askpass, char *msg)
+{
+ pid_t pid;
+ size_t len;
+ char *nl, *pass;
+ int p[2], status;
+ char buf[1024];
+
+ if (fflush(stdout) != 0)
+ error("ssh_askpass: fflush: %s", strerror(errno));
+ if (askpass == NULL)
+ fatal("internal error: askpass undefined");
+ if (pipe(p) < 0)
+ fatal("ssh_askpass: pipe: %s", strerror(errno));
+ if ((pid = fork()) < 0)
+ fatal("ssh_askpass: fork: %s", strerror(errno));
+ if (pid == 0) {
+ seteuid(getuid());
+ setuid(getuid());
+ close(p[0]);
+ if (dup2(p[1], STDOUT_FILENO) < 0)
+ fatal("ssh_askpass: dup2: %s", strerror(errno));
+ execlp(askpass, askpass, msg, (char *) 0);
+ fatal("ssh_askpass: exec(%s): %s", askpass, strerror(errno));
+ }
+ close(p[1]);
+ len = read(p[0], buf, sizeof buf);
+ close(p[0]);
+ while (waitpid(pid, &status, 0) < 0)
+ if (errno != EINTR)
+ break;
+ if (len <= 1)
+ return xstrdup("");
+ nl = strchr(buf, '\n');
+ if (nl)
+ *nl = '\0';
+ pass = xstrdup(buf);
+ memset(buf, 0, sizeof(buf));
+ return pass;
+}
+
/*
* Reads a passphrase from /dev/tty with echo turned off. Returns the
@@ -51,5 +98,27 @@ RCSID("$OpenBSD: readpass.c,v 1.14 2001/02/08 19:30:52 itojun Exp $");
char *
read_passphrase(const char *prompt, int from_stdin)
{
+ char *askpass = NULL;
+ int use_askpass = 0, ttyfd;
+
+ if (from_stdin) {
+ if (!isatty(STDIN_FILENO))
+ use_askpass = 1;
+ } else {
+ ttyfd = open("/dev/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);
+ }
+
return cli_read_passphrase(prompt, from_stdin, 0);
}