diff --git a/en_US.ISO8859-1/articles/pam/pam_unix.c b/en_US.ISO8859-1/articles/pam/pam_unix.c
new file mode 100644
index 0000000000..59ca4c28dc
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+++ b/en_US.ISO8859-1/articles/pam/pam_unix.c
@@ -0,0 +1,164 @@
+/*-
+ * Copyright (c) 2002 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.
+ *
+ * $P4: //depot/projects/openpam/modules/pam_unix/pam_unix.c#1 $
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+
+#include <pwd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <security/pam_modules.h>
+
+#ifndef _OPENPAM
+static char password_prompt[] = "Password:";
+#endif
+
+#ifndef PAM_EXTERN
+#define PAM_EXTERN
+#endif
+
+PAM_EXTERN int
+pam_sm_authenticate(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+#ifndef _OPENPAM
+	struct pam_conv *conv;
+	struct pam_message msg;
+	const struct pam_message *msgp;
+	struct pam_response *resp;
+#endif
+	struct passwd *pwd;
+	const char *user;
+	char *crypt_password, *password;
+	int pam_err, retry;
+
+	/* identify user */
+	if ((pam_err = pam_get_user(pamh, &user, NULL)) != PAM_SUCCESS)
+		return (pam_err);
+	if ((pwd = getpwnam(user)) == NULL)
+		return (PAM_USER_UNKNOWN);
+
+	/* get password */
+#ifndef _OPENPAM
+	pam_err = pam_get_item(pamh, PAM_CONV, (const void **)&conv);
+	if (pam_err != PAM_SUCCESS)
+		return (PAM_SYSTEM_ERR);
+	msg.msg_style = PAM_PROMPT_ECHO_OFF;
+	msg.msg = password_prompt;
+	msgp = &msg;
+#endif
+	for (retry = 0; retry < 3; ++retry) {
+#ifdef _OPENPAM
+		pam_err = pam_get_authtok(pamh, PAM_AUTHTOK,
+		    (const char **)&password, NULL);
+#else
+		resp = NULL;
+		pam_err = (*conv->conv)(1, &msgp, &resp, conv->appdata_ptr);
+		if (resp != NULL) {
+			if (pam_err == PAM_SUCCESS)
+				password = resp->resp;
+			else
+				free(resp->resp);
+			free(resp);
+		}
+#endif
+		if (pam_err == PAM_SUCCESS)
+			break;
+	}
+	if (pam_err == PAM_CONV_ERR)
+		return (pam_err);
+	if (pam_err != PAM_SUCCESS)
+		return (PAM_AUTH_ERR);
+
+	/* compare passwords */
+	if ((!pwd->pw_passwd[0] && (flags & PAM_DISALLOW_NULL_AUTHTOK)) ||
+	    (crypt_password = crypt(password, pwd->pw_passwd)) == NULL ||
+	    strcmp(crypt_password, pwd->pw_passwd) != 0)
+		pam_err = PAM_AUTH_ERR;
+	else
+		pam_err = PAM_SUCCESS;
+#ifndef _OPENPAM
+	free(password);
+#endif
+	return (pam_err);
+}
+
+PAM_EXTERN int
+pam_sm_setcred(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (PAM_SUCCESS);
+}
+
+PAM_EXTERN int
+pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (PAM_SUCCESS);
+}
+
+PAM_EXTERN int
+pam_sm_open_session(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (PAM_SUCCESS);
+}
+
+PAM_EXTERN int
+pam_sm_close_session(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (PAM_SUCCESS);
+}
+
+PAM_EXTERN int
+pam_sm_chauthtok(pam_handle_t *pamh, int flags,
+	int argc, const char *argv[])
+{
+
+	return (PAM_SERVICE_ERR);
+}
+
+#ifdef PAM_MODULE_ENTRY
+PAM_MODULE_ENTRY("pam_unix");
+#endif