Initial revision

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.
+ */