MFV (r255364): move the code around in preparation for Nummularia.

1 files changed, 135 insertions, 0 deletions

diff --git a/contrib/openpam/lib/libpam/pam_get_user.c b/contrib/openpam/lib/libpam/pam_get_user.c
new file mode 100644
index 0000000..53245b9
--- /dev/null
+++ b/contrib/openpam/lib/libpam/pam_get_user.c
@@ -0,0 +1,135 @@
+/*-
+ * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
+ * Copyright (c) 2004-2011 Dag-Erling Smørgrav
+ * All rights reserved.
+ *
+ * This software was developed for the FreeBSD Project by ThinkSec AS and
+ * Network Associates Laboratories, 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.
+ *
+ * $Id: pam_get_user.c 455 2011-10-29 18:31:11Z des $
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <sys/param.h>
+
+#include <stdlib.h>
+
+#include <security/pam_appl.h>
+#include <security/openpam.h>
+
+#include "openpam_impl.h"
+
+static const char user_prompt[] = "Login:";
+
+/*
+ * XSSO 4.2.1
+ * XSSO 6 page 52
+ *
+ * Retrieve user name
+ */
+
+int
+pam_get_user(pam_handle_t *pamh,
+	const char **user,
+	const char *prompt)
+{
+	char prompt_buf[1024];
+	size_t prompt_size;
+	const void *promptp;
+	char *resp;
+	int r;
+
+	ENTER();
+	if (pamh == NULL || user == NULL)
+		RETURNC(PAM_SYSTEM_ERR);
+	r = pam_get_item(pamh, PAM_USER, (const void **)user);
+	if (r == PAM_SUCCESS && *user != NULL)
+		RETURNC(PAM_SUCCESS);
+	/* pam policy overrides the module's choice */
+	if ((promptp = openpam_get_option(pamh, "user_prompt")) != NULL)
+		prompt = promptp;
+	/* no prompt provided, see if there is one tucked away somewhere */
+	if (prompt == NULL)
+		if (pam_get_item(pamh, PAM_USER_PROMPT, &promptp) &&
+		    promptp != NULL)
+			prompt = promptp;
+	/* fall back to hardcoded default */
+	if (prompt == NULL)
+		prompt = user_prompt;
+	/* expand */
+	prompt_size = sizeof prompt_buf;
+	r = openpam_subst(pamh, prompt_buf, &prompt_size, prompt);
+	if (r == PAM_SUCCESS && prompt_size <= sizeof prompt_buf)
+		prompt = prompt_buf;
+	r = pam_prompt(pamh, PAM_PROMPT_ECHO_ON, &resp, "%s", prompt);
+	if (r != PAM_SUCCESS)
+		RETURNC(r);
+	r = pam_set_item(pamh, PAM_USER, resp);
+	FREE(resp);
+	if (r != PAM_SUCCESS)
+		RETURNC(r);
+	r = pam_get_item(pamh, PAM_USER, (const void **)user);
+	RETURNC(r);
+}
+
+/*
+ * Error codes:
+ *
+ *	=pam_get_item
+ *	=pam_prompt
+ *	=pam_set_item
+ *	!PAM_SYMBOL_ERR
+ */
+
+/**
+ * The =pam_get_user function returns the name of the target user, as
+ * specified to =pam_start.
+ * If no user was specified, nor set using =pam_set_item, =pam_get_user
+ * will prompt for a user name.
+ * Either way, a pointer to the user name is stored in the location
+ * pointed to by the =user argument.
+ *
+ * The =prompt argument specifies a prompt to use if no user name is
+ * cached.
+ * If it is =NULL, the =PAM_USER_PROMPT item will be used.
+ * If that item is also =NULL, a hardcoded default prompt will be used.
+ * Either way, the prompt is expanded using =openpam_subst before it is
+ * passed to the conversation function.
+ *
+ * If =pam_get_user is called from a module and the ;user_prompt option is
+ * set in the policy file, the value of that option takes precedence over
+ * both the =prompt argument and the =PAM_USER_PROMPT item.
+ *
+ * >pam_get_item
+ * >pam_get_authtok
+ * >openpam_subst
+ */