Adding upstream version 1.3.1.upstream/1.3.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 137 insertions, 0 deletions

diff --git a/modules/pam_rhosts/pam_rhosts.c b/modules/pam_rhosts/pam_rhosts.c
new file mode 100644
index 0000000..ed98d63
--- /dev/null
+++ b/modules/pam_rhosts/pam_rhosts.c
@@ -0,0 +1,137 @@
+/*
+ * 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, and the entire permission notice in its entirety,
+ *    including the disclaimer of warranties.
+ * 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.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of
+ * the GNU Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions.  (This clause is
+ * necessary due to a potential bad interaction between the GPL and
+ * the restrictions contained in a BSD-style copyright.)
+ *
+ * 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.
+ */
+#include "config.h"
+
+#include <pwd.h>
+#include <netdb.h>
+#include <string.h>
+#include <syslog.h>
+
+#define PAM_SM_AUTH  /* only defines this management group */
+
+#include <security/pam_modules.h>
+#include <security/pam_modutil.h>
+#include <security/pam_ext.h>
+
+int pam_sm_authenticate (pam_handle_t *pamh, int flags, int argc,
+			 const char **argv)
+{
+    const char *luser = NULL;
+    const char *ruser = NULL, *rhost = NULL;
+    const char *opt_superuser = NULL;
+    const void *c_void;
+    int opt_debug = 0;
+    int opt_silent;
+    int as_root;
+    int retval;
+
+    opt_silent = flags & PAM_SILENT;
+
+    while (argc-- > 0) {
+      if (strcmp(*argv, "debug") == 0)
+	opt_debug = 1;
+      else if (strcmp (*argv, "silent") == 0 || strcmp(*argv, "suppress") == 0)
+	opt_silent = 1;
+      else if (strncmp(*argv, "superuser=", sizeof("superuser=")-1) == 0)
+	opt_superuser = *argv+sizeof("superuser=")-1;
+      else
+	pam_syslog(pamh, LOG_WARNING, "unrecognized option '%s'", *argv);
+
+      ++argv;
+    }
+
+    retval = pam_get_item (pamh, PAM_RHOST, &c_void);
+    if (retval != PAM_SUCCESS) {
+      pam_syslog(pamh, LOG_ERR, "could not get the remote host name");
+      return retval;
+    }
+    rhost = c_void;
+
+    retval = pam_get_item(pamh, PAM_RUSER, &c_void);
+    ruser = c_void;
+    if (retval != PAM_SUCCESS) {
+      pam_syslog(pamh, LOG_ERR, "could not get the remote username");
+      return retval;
+    }
+
+    retval = pam_get_user(pamh, &luser, NULL);
+    if (retval != PAM_SUCCESS) {
+      pam_syslog(pamh, LOG_ERR, "could not determine name of local user");
+      return retval;
+    }
+
+    if (rhost == NULL || ruser == NULL || luser == NULL)
+      return PAM_AUTH_ERR;
+
+    if (opt_superuser && strcmp(opt_superuser, luser) == 0)
+      as_root = 1;
+    else {
+      struct passwd *lpwd;
+
+      lpwd = pam_modutil_getpwnam(pamh, luser);
+      if (lpwd == NULL) {
+	if (opt_debug)
+	  /* don't print by default, could be the user's password */
+	  pam_syslog(pamh, LOG_DEBUG,
+		     "user '%s' unknown to this system", luser);
+	return PAM_USER_UNKNOWN;
+
+      }
+      as_root = (lpwd->pw_uid == 0);
+    }
+
+#ifdef HAVE_RUSEROK_AF
+    retval = ruserok_af (rhost, as_root, ruser, luser, PF_UNSPEC);
+#else
+    retval = ruserok (rhost, as_root, ruser, luser);
+#endif
+    if (retval != 0) {
+      if (!opt_silent || opt_debug)
+	pam_syslog(pamh, LOG_WARNING, "denied access to %s@%s as %s",
+		   ruser, rhost, luser);
+      return PAM_AUTH_ERR;
+    } else {
+      if (!opt_silent || opt_debug)
+	pam_syslog(pamh, LOG_NOTICE, "allowed access to %s@%s as %s",
+		   ruser, rhost, luser);
+      return PAM_SUCCESS;
+    }
+}
+
+
+int
+pam_sm_setcred (pam_handle_t *pamh UNUSED, int flags UNUSED,
+		int argc UNUSED, const char **argv UNUSED)
+{
+  return PAM_SUCCESS;
+}