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-rw-r--r--modules/pam_userdb/conv.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/modules/pam_userdb/conv.c b/modules/pam_userdb/conv.c
new file mode 100644
index 00000000..0f13d03a
--- /dev/null
+++ b/modules/pam_userdb/conv.c
@@ -0,0 +1,125 @@
+/*
+ * Conversation related functions
+ */
+
+/* $Id */
+/* Copyright at the end of the file */
+
+#define _BSD_SOURCE
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <security/pam_modules.h>
+#include <security/_pam_macros.h>
+
+#include "pam_userdb.h"
+
+/*
+ * dummy conversation function sending exactly one prompt
+ * and expecting exactly one response from the other party
+ */
+static int converse(pam_handle_t *pamh,
+ struct pam_message **message,
+ struct pam_response **response)
+{
+ int retval;
+ const struct pam_conv *conv;
+
+ retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv ) ;
+ if (retval == PAM_SUCCESS)
+ retval = conv->conv(1, (const struct pam_message **)message,
+ response, conv->appdata_ptr);
+
+ return retval; /* propagate error status */
+}
+
+
+static char *_pam_delete(register char *xx)
+{
+ _pam_overwrite(xx);
+ _pam_drop(xx);
+ return NULL;
+}
+
+/*
+ * This is a conversation function to obtain the user's password
+ */
+int conversation(pam_handle_t *pamh)
+{
+ struct pam_message msg[2],*pmsg[2];
+ struct pam_response *resp;
+ int retval;
+ char * token = NULL;
+
+ pmsg[0] = &msg[0];
+ msg[0].msg_style = PAM_PROMPT_ECHO_OFF;
+ msg[0].msg = "Password: ";
+
+ /* so call the conversation expecting i responses */
+ resp = NULL;
+ retval = converse(pamh, pmsg, &resp);
+
+ if (resp != NULL) {
+ const char * item;
+ /* interpret the response */
+ if (retval == PAM_SUCCESS) { /* a good conversation */
+ token = x_strdup(resp[0].resp);
+ if (token == NULL) {
+ return PAM_AUTHTOK_RECOVER_ERR;
+ }
+ }
+
+ /* set the auth token */
+ retval = pam_set_item(pamh, PAM_AUTHTOK, token);
+ token = _pam_delete(token); /* clean it up */
+ if ( (retval != PAM_SUCCESS) ||
+ (retval = pam_get_item(pamh, PAM_AUTHTOK, (const void **)&item))
+ != PAM_SUCCESS ) {
+ return retval;
+ }
+
+ _pam_drop_reply(resp, 1);
+ } else {
+ retval = (retval == PAM_SUCCESS)
+ ? PAM_AUTHTOK_RECOVER_ERR:retval ;
+ }
+
+ return retval;
+}
+
+/*
+ * Copyright (c) Cristian Gafton <gafton@redhat.com>, 1999
+ * 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, 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.
+ */