+/*
+ *
+ * Copyright (c) 2001 Gert Doering. 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"
+#include "auth.h"
+#include "ssh.h"
+#include "log.h"
+#include "servconf.h"
+#include "canohost.h"
+#include "xmalloc.h"
+#include "buffer.h"
#ifdef _AIX
#include <uinfo.h>
-#include <../xmalloc.h>
+#include "port-aix.h"
+
+extern ServerOptions options;
+extern Buffer loginmsg;
+
+# ifdef HAVE_SETAUTHDB
+static char old_registry[REGISTRY_SIZE] = "";
+# endif
/*
- * AIX has a "usrinfo" area where logname and
- * other stuff is stored - a few applications
- * actually use this and die if it's not set
+ * AIX has a "usrinfo" area where logname and other stuff is stored -
+ * a few applications actually use this and die if it's not set
+ *
+ * NOTE: TTY= should be set, but since no one uses it and it's hard to
+ * acquire due to privsep code. We will just drop support.
*/
void
-aix_usrinfo(struct passwd *pw, char *tty, int ttyfd)
+aix_usrinfo(struct passwd *pw)
{
u_int i;
- char *cp=NULL;
+ size_t len;
+ char *cp;
- if (ttyfd == -1)
- tty[0] = '\0';
- cp = xmalloc(22 + strlen(tty) + 2 * strlen(pw->pw_name));
- i = sprintf(cp, "LOGNAME=%s%cNAME=%s%cTTY=%s%c%c", pw->pw_name, 0,
- pw->pw_name, 0, tty, 0, 0);
+ len = sizeof("LOGNAME= NAME= ") + (2 * strlen(pw->pw_name));
+ cp = xmalloc(len);
+
+ i = snprintf(cp, len, "LOGNAME=%s%cNAME=%s%c", pw->pw_name, '\0',
+ pw->pw_name, '\0');
if (usrinfo(SETUINFO, cp, i) == -1)
fatal("Couldn't set usrinfo: %s", strerror(errno));
debug3("AIX/UsrInfo: set len %d", i);
+
xfree(cp);
}
-#endif /* _AIX */
+# ifdef WITH_AIXAUTHENTICATE
+/*
+ * Remove embedded newlines in string (if any).
+ * Used before logging messages returned by AIX authentication functions
+ * so the message is logged on one line.
+ */
+void
+aix_remove_embedded_newlines(char *p)
+{
+ if (p == NULL)
+ return;
+
+ for (; *p; p++) {
+ if (*p == '\n')
+ *p = ' ';
+ }
+ /* Remove trailing whitespace */
+ if (*--p == ' ')
+ *p = '\0';
+}
+
+/*
+ * Do authentication via AIX's authenticate routine. We loop until the
+ * reenter parameter is 0, but normally authenticate is called only once.
+ *
+ * Note: this function returns 1 on success, whereas AIX's authenticate()
+ * returns 0.
+ */
+int
+sys_auth_passwd(Authctxt *ctxt, const char *password)
+{
+ char *authmsg = NULL, *host, *msg, *name = ctxt->pw->pw_name;
+ int authsuccess = 0, expired, reenter, result;
+
+ do {
+ result = authenticate((char *)name, (char *)password, &reenter,
+ &authmsg);
+ aix_remove_embedded_newlines(authmsg);
+ debug3("AIX/authenticate result %d, msg %.100s", result,
+ authmsg);
+ } while (reenter);
+
+ if (result == 0) {
+ authsuccess = 1;
+
+ host = (char *)get_canonical_hostname(options.use_dns);
+
+ /*
+ * Record successful login. We don't have a pty yet, so just
+ * label the line as "ssh"
+ */
+ aix_setauthdb(name);
+ if (loginsuccess((char *)name, (char *)host, "ssh", &msg) == 0) {
+ if (msg != NULL) {
+ debug("%s: msg %s", __func__, msg);
+ buffer_append(&loginmsg, msg, strlen(msg));
+ xfree(msg);
+ }
+ }
+
+ /*
+ * Check if the user's password is expired.
+ */
+ expired = passwdexpired(name, &msg);
+ if (msg && *msg) {
+ buffer_append(&loginmsg, msg, strlen(msg));
+ aix_remove_embedded_newlines(msg);
+ }
+ debug3("AIX/passwdexpired returned %d msg %.100s", expired, msg);
+
+ switch (expired) {
+ case 0: /* password not expired */
+ break;
+ case 1: /* expired, password change required */
+ ctxt->force_pwchange = 1;
+ disable_forwarding();
+ break;
+ default: /* user can't change(2) or other error (-1) */
+ logit("Password can't be changed for user %s: %.100s",
+ name, msg);
+ if (msg)
+ xfree(msg);
+ authsuccess = 0;
+ }
+
+ aix_restoreauthdb();
+ }
+
+ if (authmsg != NULL)
+ xfree(authmsg);
+ return authsuccess;
+}
+
+# ifdef CUSTOM_FAILED_LOGIN
+/*
+ * record_failed_login: generic "login failed" interface function
+ */
+void
+record_failed_login(const char *user, const char *ttyname)
+{
+ char *hostname = (char *)get_canonical_hostname(options.use_dns);
+
+ if (geteuid() != 0)
+ return;
+
+ aix_setauthdb(user);
+# ifdef AIX_LOGINFAILED_4ARG
+ loginfailed((char *)user, hostname, (char *)ttyname, AUDIT_FAIL_AUTH);
+# else
+ loginfailed((char *)user, hostname, (char *)ttyname);
+# endif
+ aix_restoreauthdb();
+}
+# endif /* CUSTOM_FAILED_LOGIN */
+
+/*
+ * If we have setauthdb, retrieve the password registry for the user's
+ * account then feed it to setauthdb. This will mean that subsequent AIX auth
+ * functions will only use the specified loadable module. If we don't have
+ * setauthdb this is a no-op.
+ */
+void
+aix_setauthdb(const char *user)
+{
+# ifdef HAVE_SETAUTHDB
+ char *registry;
+
+ if (setuserdb(S_READ) == -1) {
+ debug3("%s: Could not open userdb to read", __func__);
+ return;
+ }
+
+ if (getuserattr((char *)user, S_REGISTRY, ®istry, SEC_CHAR) == 0) {
+ if (setauthdb(registry, old_registry) == 0)
+ debug3("AIX/setauthdb set registry '%s'", registry);
+ else
+ debug3("AIX/setauthdb set registry '%s' failed: %s",
+ registry, strerror(errno));
+ } else
+ debug3("%s: Could not read S_REGISTRY for user: %s", __func__,
+ strerror(errno));
+ enduserdb();
+# endif /* HAVE_SETAUTHDB */
+}
+
+/*
+ * Restore the user's registry settings from old_registry.
+ * Note that if the first aix_setauthdb fails, setauthdb("") is still safe
+ * (it restores the system default behaviour). If we don't have setauthdb,
+ * this is a no-op.
+ */
+void
+aix_restoreauthdb(void)
+{
+# ifdef HAVE_SETAUTHDB
+ if (setauthdb(old_registry, NULL) == 0)
+ debug3("%s: restoring old registry '%s'", __func__,
+ old_registry);
+ else
+ debug3("%s: failed to restore old registry %s", __func__,
+ old_registry);
+# endif /* HAVE_SETAUTHDB */
+}
+
+# endif /* WITH_AIXAUTHENTICATE */
+
+#endif /* _AIX */
andersk / gssapi-openssh.git / blobdiff