Just to show that PAM can do almost anything from the ridiculous to the

obscene, or - as they say in New York - sophisticated, add pam_echo(8) and
pam_exec(8) to our ever-lengthening roster of PAM modules.

Sponsored by:	DARPA, NAI Labs.

1 files changed, 126 insertions, 0 deletions

diff --git a/lib/libpam/modules/pam_echo/pam_echo.c b/lib/libpam/modules/pam_echo/pam_echo.c
new file mode 100644
index 0000000..4ec0fd2
--- /dev/null
+++ b/lib/libpam/modules/pam_echo/pam_echo.c
@@ -0,0 +1,126 @@
+/*-
+ * Copyright (c) 2001 Networks Associates Technology, Inc.
+ * All rights reserved.
+ *
+ * This software was developed for the FreeBSD Project by ThinkSec AS and
+ * NAI Labs, the Security Research Division of Network Associates, Inc.
+ * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
+ * DARPA CHATS research program.
+ *
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <security/pam_appl.h>
+#include <security/pam_modules.h>
+#include <security/openpam.h>
+
+static int
+_pam_echo(pam_handle_t *pamh, int flags,
+    int argc, const char *argv[])
+{
+	struct pam_message msg;
+	const struct pam_message *msgp;
+	const struct pam_conv *pamc;
+	struct pam_response *resp;
+	size_t len;
+	int i, pam_err;
+
+	if (flags & PAM_SILENT)
+		return (PAM_SUCCESS);
+	pam_err = pam_get_item(pamh, PAM_CONV, (const void **)&pamc);
+	if (pam_err != PAM_SUCCESS)
+		return (pam_err);
+	for (i = 0, len = 0; i < argc; ++i)
+		len += strlen(argv[i]) + 1;
+	if ((msg.msg = malloc(len)) == NULL)
+		return (PAM_BUF_ERR);
+	for (i = 0, len = 0; i < argc; ++i)
+		len += sprintf(msg.msg + len, "%s%s", i ? " " : "", argv[i]);
+	msg.msg[len] = '\0';
+	msg.msg_style = PAM_TEXT_INFO;
+	msgp = &msg;
+	resp = NULL;
+	pam_err = (pamc->conv)(1, &msgp, &resp, pamc->appdata_ptr);
+	free(resp);
+	free(msg.msg);
+	return (pam_err);
+}
+
+PAM_EXTERN int
+pam_sm_authenticate(pam_handle_t *pamh, int flags,
+    int argc, const char *argv[])
+{
+
+	return (_pam_echo(pamh, flags, argc, argv));
+}
+
+PAM_EXTERN int
+pam_sm_setcred(pam_handle_t *pamh, int flags,
+    int argc, const char *argv[])
+{
+
+	return (_pam_echo(pamh, flags, argc, argv));
+}
+
+PAM_EXTERN int
+pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
+    int argc, const char *argv[])
+{
+
+	return (_pam_echo(pamh, flags, argc, argv));
+}
+
+PAM_EXTERN int
+pam_sm_open_session(pam_handle_t *pamh, int flags,
+    int argc, const char *argv[])
+{
+
+	return (_pam_echo(pamh, flags, argc, argv));
+}
+
+PAM_EXTERN int
+pam_sm_close_session(pam_handle_t *pamh, int flags,
+    int argc, const char *argv[])
+{
+
+	return (_pam_echo(pamh, flags, argc, argv));
+}
+
+PAM_EXTERN int
+pam_sm_chauthtok(pam_handle_t *pamh, int flags,
+    int argc, const char *argv[])
+{
+
+	return (_pam_echo(pamh, flags, argc, argv));
+}
+
+PAM_MODULE_ENTRY("pam_echo");