Imported Upstream version 1.8.1p2

[debian/sudo] / plugins / sudoers / auth / fwtk.c

diff --git a/plugins/sudoers/auth/fwtk.c b/plugins/sudoers/auth/fwtk.c
new file mode 100644 (file)
index 0000000..a3a5cff
--- /dev/null
+++ b/plugins/sudoers/auth/fwtk.c
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 1999-2005, 2008, 2010-2011
+ *     Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#include <pwd.h>
+
+#include <auth.h>
+#include <firewall.h>
+
+#include "sudoers.h"
+#include "sudo_auth.h"
+
+int
+fwtk_init(struct passwd *pw, char **promptp, sudo_auth *auth)
+{
+    static Cfg *confp;                 /* Configuration entry struct */
+    char resp[128];                    /* Response from the server */
+
+    if ((confp = cfg_read("sudo")) == (Cfg *)-1) {
+       warningx("cannot read fwtk config");
+       return AUTH_FATAL;
+    }
+
+    if (auth_open(confp)) {
+       warningx("cannot connect to authentication server");
+       return AUTH_FATAL;
+    }
+
+    /* Get welcome message from auth server */
+    if (auth_recv(resp, sizeof(resp))) {
+       warningx("lost connection to authentication server");
+       return AUTH_FATAL;
+    }
+    if (strncmp(resp, "Authsrv ready", 13) != 0) {
+       warningx("authentication server error:\n%s", resp);
+       return AUTH_FATAL;
+    }
+
+    return AUTH_SUCCESS;
+}
+
+int
+fwtk_verify(struct passwd *pw, char *prompt, sudo_auth *auth)
+{
+    char *pass;                                /* Password from the user */
+    char buf[SUDO_PASS_MAX + 12];      /* General prupose buffer */
+    char resp[128];                    /* Response from the server */
+    int error;
+
+    /* Send username to authentication server. */
+    (void) snprintf(buf, sizeof(buf), "authorize %s 'sudo'", pw->pw_name);
+restart:
+    if (auth_send(buf) || auth_recv(resp, sizeof(resp))) {
+       warningx("lost connection to authentication server");
+       return AUTH_FATAL;
+    }
+
+    /* Get the password/response from the user. */
+    if (strncmp(resp, "challenge ", 10) == 0) {
+       (void) snprintf(buf, sizeof(buf), "%s\nResponse: ", &resp[10]);
+       pass = auth_getpass(buf, def_passwd_timeout * 60, SUDO_CONV_PROMPT_ECHO_OFF);
+       if (pass && *pass == '\0') {
+           pass = auth_getpass("Response [echo on]: ",
+               def_passwd_timeout * 60, SUDO_CONV_PROMPT_ECHO_ON);
+       }
+    } else if (strncmp(resp, "chalnecho ", 10) == 0) {
+       pass = auth_getpass(&resp[10], def_passwd_timeout * 60,
+           SUDO_CONV_PROMPT_ECHO_OFF);
+    } else if (strncmp(resp, "password", 8) == 0) {
+       pass = auth_getpass(prompt, def_passwd_timeout * 60,
+           SUDO_CONV_PROMPT_ECHO_OFF);
+    } else if (strncmp(resp, "display ", 8) == 0) {
+       fprintf(stderr, "%s\n", &resp[8]);
+       strlcpy(buf, "response dummy", sizeof(buf));
+       goto restart;
+    } else {
+       warningx("%s", resp);
+       return AUTH_FATAL;
+    }
+    if (!pass) {                       /* ^C or error */
+       return AUTH_INTR;
+    }
+
+    /* Send the user's response to the server */
+    (void) snprintf(buf, sizeof(buf), "response '%s'", pass);
+    if (auth_send(buf) || auth_recv(resp, sizeof(resp))) {
+       warningx("lost connection to authentication server");
+       error = AUTH_FATAL;
+       goto done;
+    }
+
+    if (strncmp(resp, "ok", 2) == 0) {
+       error = AUTH_SUCCESS;
+       goto done;
+    }
+
+    /* Main loop prints "Permission Denied" or insult. */
+    if (strcmp(resp, "Permission Denied.") != 0)
+       warningx("%s", resp);
+    error = AUTH_FAILURE;
+done:
+    zero_bytes(pass, strlen(pass));
+    zero_bytes(buf, strlen(buf));
+    return error;
+}
+
+int
+fwtk_cleanup(struct passwd *pw, sudo_auth *auth)
+{
+
+    auth_close();
+    return AUTH_SUCCESS;
+}