*/
#include "includes.h"
-RCSID("$OpenBSD: readpass.c,v 1.27 2002/03/26 15:58:46 markus Exp $");
+RCSID("$OpenBSD: readpass.c,v 1.33 2005/05/02 21:13:22 markus Exp $");
#include "xmalloc.h"
-#include "readpass.h"
+#include "misc.h"
#include "pathnames.h"
#include "log.h"
#include "ssh.h"
fatal("internal error: askpass undefined");
if (pipe(p) < 0) {
error("ssh_askpass: pipe: %s", strerror(errno));
- return xstrdup("");
+ return NULL;
}
if ((pid = fork()) < 0) {
error("ssh_askpass: fork: %s", strerror(errno));
- return xstrdup("");
+ return NULL;
}
if (pid == 0) {
seteuid(getuid());
if (errno != EINTR)
break;
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+ memset(buf, 0, sizeof(buf));
+ return NULL;
+ }
+
buf[strcspn(buf, "\r\n")] = '\0';
pass = xstrdup(buf);
memset(buf, 0, sizeof(buf));
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))
+ if (flags & RP_USE_ASKPASS)
+ use_askpass = 1;
+ else if (flags & RP_ALLOW_STDIN) {
+ if (!isatty(STDIN_FILENO)) {
+ debug("read_passphrase: stdin is not a tty");
use_askpass = 1;
+ }
} else {
rppflags |= RPP_REQUIRE_TTY;
ttyfd = open(_PATH_TTY, O_RDWR);
if (ttyfd >= 0)
close(ttyfd);
- else
+ else {
+ debug("read_passphrase: can't open %s: %s", _PATH_TTY,
+ strerror(errno));
use_askpass = 1;
+ }
}
+ if ((flags & RP_USE_ASKPASS) && getenv("DISPLAY") == NULL)
+ return (flags & RP_ALLOW_EOF) ? NULL : xstrdup("");
+
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 ((ret = ssh_askpass(askpass, prompt)) == NULL)
+ if (!(flags & RP_ALLOW_EOF))
+ return xstrdup("");
+ return ret;
}
if (readpassphrase(prompt, buf, sizeof buf, rppflags) == NULL) {
memset(buf, 'x', sizeof buf);
return ret;
}
+
+int
+ask_permission(const char *fmt, ...)
+{
+ va_list args;
+ char *p, prompt[1024];
+ int allowed = 0;
+
+ va_start(args, fmt);
+ vsnprintf(prompt, sizeof(prompt), fmt, args);
+ va_end(args);
+
+ p = read_passphrase(prompt, RP_USE_ASKPASS|RP_ALLOW_EOF);
+ if (p != NULL) {
+ /*
+ * Accept empty responses and responses consisting
+ * of the word "yes" as affirmative.
+ */
+ if (*p == '\0' || *p == '\n' ||
+ strcasecmp(p, "yes") == 0)
+ allowed = 1;
+ xfree(p);
+ }
+
+ return (allowed);
+}