Adding upstream version 1.4.0.upstream/1.4.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 1317 insertions, 0 deletions

diff --git a/libpam/include/pam_cc_compat.h b/libpam/include/pam_cc_compat.h
new file mode 100644
index 0000000..6919036
--- /dev/null
+++ b/libpam/include/pam_cc_compat.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2020 Dmitry V. Levin <ldv@altlinux.org>
+ */
+
+#ifndef PAM_CC_COMPAT_H
+#define PAM_CC_COMPAT_H
+
+#include "config.h"
+#include <security/_pam_types.h>
+
+#if defined __clang__ && defined __clang_major__ && defined __clang_minor__
+# define PAM_CLANG_PREREQ(maj, min)					\
+	((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
+#else
+# define PAM_CLANG_PREREQ(maj, min)	0
+#endif
+
+#if PAM_GNUC_PREREQ(2, 7)
+# define PAM_ATTRIBUTE_ALIGNED(arg)	__attribute__((__aligned__(arg)))
+#else
+# define PAM_ATTRIBUTE_ALIGNED(arg)	/* empty */
+#endif
+
+#if PAM_GNUC_PREREQ(4, 6)
+# define DIAG_PUSH_IGNORE_CAST_QUAL					\
+	_Pragma("GCC diagnostic push");					\
+	_Pragma("GCC diagnostic ignored \"-Wcast-qual\"")
+# define DIAG_POP_IGNORE_CAST_QUAL					\
+	_Pragma("GCC diagnostic pop")
+# define DIAG_PUSH_IGNORE_CAST_ALIGN					\
+	_Pragma("GCC diagnostic push");					\
+	_Pragma("GCC diagnostic ignored \"-Wcast-align\"")
+# define DIAG_POP_IGNORE_CAST_ALIGN					\
+	_Pragma("GCC diagnostic pop")
+#elif PAM_CLANG_PREREQ(2, 6)
+# define DIAG_PUSH_IGNORE_CAST_QUAL					\
+	_Pragma("clang diagnostic push");				\
+	_Pragma("clang diagnostic ignored \"-Wcast-qual\"")
+# define DIAG_POP_IGNORE_CAST_QUAL					\
+	_Pragma("clang diagnostic pop")
+# define DIAG_PUSH_IGNORE_CAST_ALIGN					\
+	_Pragma("clang diagnostic push");				\
+	_Pragma("clang diagnostic ignored \"-Wcast-align\"")
+# define DIAG_POP_IGNORE_CAST_ALIGN					\
+	_Pragma("clang diagnostic pop")
+#else
+# define DIAG_PUSH_IGNORE_CAST_QUAL	/* empty */
+# define DIAG_POP_IGNORE_CAST_QUAL	/* empty */
+# define DIAG_PUSH_IGNORE_CAST_ALIGN	/* empty */
+# define DIAG_POP_IGNORE_CAST_ALIGN	/* empty */
+#endif
+
+/*
+ * Evaluates to
+ * 1, if the given two types are known to be the same
+ * 0, otherwise.
+ */
+#if PAM_GNUC_PREREQ(3, 0)
+# define PAM_IS_SAME_TYPE(x_, y_)					\
+	__builtin_types_compatible_p(__typeof__(x_), __typeof__(y_))
+#else
+/* Cannot tell whether these types are the same.  */
+# define PAM_IS_SAME_TYPE(x_, y_)	0
+#endif
+
+#endif /* PAM_CC_COMPAT_H */
diff --git a/libpam/include/pam_inline.h b/libpam/include/pam_inline.h
new file mode 100644
index 0000000..ec05fe4
--- /dev/null
+++ b/libpam/include/pam_inline.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2020 Dmitry V. Levin <ldv@altlinux.org>
+ *
+ * Handy inline functions and macros providing some convenient functionality
+ * to libpam and its modules.
+ */
+
+#ifndef PAM_INLINE_H
+#define PAM_INLINE_H
+
+#include "pam_cc_compat.h"
+#include <string.h>
+
+/*
+ * Evaluates to
+ * - a syntax error if the argument is 0,
+ * 0, otherwise.
+ */
+#define PAM_FAIL_BUILD_ON_ZERO(e_)	(sizeof(int[-1 + 2 * !!(e_)]) * 0)
+
+/*
+ * Evaluates to
+ * 1, if the given type is known to be a non-array type
+ * 0, otherwise.
+ */
+#define PAM_IS_NOT_ARRAY(a_)		PAM_IS_SAME_TYPE((a_), &(a_)[0])
+
+/*
+ * Evaluates to
+ * - a syntax error if the argument is not an array,
+ * 0, otherwise.
+ */
+#define PAM_MUST_BE_ARRAY(a_)		PAM_FAIL_BUILD_ON_ZERO(!PAM_IS_NOT_ARRAY(a_))
+
+/* Evaluates to the number of elements in the specified array.  */
+#define PAM_ARRAY_SIZE(a_)		(sizeof(a_) / sizeof((a_)[0]) + PAM_MUST_BE_ARRAY(a_))
+
+/*
+ * Returns NULL if STR does not start with PREFIX,
+ * or a pointer to the first char in STR after PREFIX.
+ * The length of PREFIX is specified by PREFIX_LEN.
+ */
+static inline const char *
+pam_str_skip_prefix_len(const char *str, const char *prefix, size_t prefix_len)
+{
+	return strncmp(str, prefix, prefix_len) ? NULL : str + prefix_len;
+}
+
+#define pam_str_skip_prefix(str_, prefix_)	\
+	pam_str_skip_prefix_len((str_), (prefix_), sizeof(prefix_) - 1 + PAM_MUST_BE_ARRAY(prefix_))
+
+/*
+ * Returns NULL if STR does not start with PREFIX
+ * (ignoring the case of the characters),
+ * or a pointer to the first char in STR after PREFIX.
+ * The length of PREFIX is specified by PREFIX_LEN.
+ */
+static inline const char *
+pam_str_skip_icase_prefix_len(const char *str, const char *prefix, size_t prefix_len)
+{
+	return strncasecmp(str, prefix, prefix_len) ? NULL : str + prefix_len;
+}
+
+#define pam_str_skip_icase_prefix(str_, prefix_)	\
+	pam_str_skip_icase_prefix_len((str_), (prefix_), sizeof(prefix_) - 1 + PAM_MUST_BE_ARRAY(prefix_))
+
+#endif /* PAM_INLINE_H */
diff --git a/libpam/include/security/_pam_compat.h b/libpam/include/security/_pam_compat.h
new file mode 100644
index 0000000..a5f58e4
--- /dev/null
+++ b/libpam/include/security/_pam_compat.h
@@ -0,0 +1,126 @@
+#ifndef _PAM_COMPAT_H
+#define _PAM_COMPAT_H
+
+/*
+ * This file was contributed by Derrick J Brashear <shadow@dementia.org>
+ * slight modification by Brad M. Garcia <bgarcia@fore.com>
+ *
+ * A number of operating systems have started to implement PAM.
+ * unfortunately, they have a different set of numeric values for
+ * certain constants.  This file is included for compatibility's sake.
+ */
+
+/* Solaris uses different constants. We redefine to those here */
+#if defined(solaris) || (defined(__SVR4) && defined(sun))
+
+# ifdef _SECURITY_PAM_MODULES_H
+
+/* flags for pam_chauthtok() */
+#  undef PAM_PRELIM_CHECK
+#  define PAM_PRELIM_CHECK        	0x1
+
+#  undef PAM_UPDATE_AUTHTOK
+#  define PAM_UPDATE_AUTHTOK      	0x2
+
+# endif /* _SECURITY_PAM_MODULES_H */
+
+# ifdef _SECURITY__PAM_TYPES_H
+
+/* generic for pam_* functions */
+# undef PAM_SILENT
+# define PAM_SILENT              	0x80000000
+
+# undef PAM_CHANGE_EXPIRED_AUTHTOK
+# define PAM_CHANGE_EXPIRED_AUTHTOK 	0x4
+
+/* flags for pam_setcred() */
+# undef PAM_ESTABLISH_CRED
+# define PAM_ESTABLISH_CRED      	0x1
+
+# undef PAM_DELETE_CRED
+# define PAM_DELETE_CRED         	0x2
+
+# undef PAM_REINITIALIZE_CRED
+# define PAM_REINITIALIZE_CRED   	0x4
+
+# undef PAM_REFRESH_CRED
+# define PAM_REFRESH_CRED        	0x8
+
+/* another binary incompatibility comes from the return codes! */
+
+# undef PAM_CONV_ERR
+# define PAM_CONV_ERR            	6
+
+# undef PAM_PERM_DENIED
+# define PAM_PERM_DENIED         	7
+
+# undef PAM_MAXTRIES
+# define PAM_MAXTRIES            	8
+
+# undef PAM_AUTH_ERR
+# define PAM_AUTH_ERR            	9
+
+# undef PAM_NEW_AUTHTOK_REQD
+# define PAM_NEW_AUTHTOK_REQD    	10
+
+# undef PAM_CRED_INSUFFICIENT
+# define PAM_CRED_INSUFFICIENT   	11
+
+# undef PAM_AUTHINFO_UNAVAIL
+# define PAM_AUTHINFO_UNAVAIL    	12
+
+# undef PAM_USER_UNKNOWN
+# define PAM_USER_UNKNOWN        	13
+
+# undef PAM_CRED_UNAVAIL
+# define PAM_CRED_UNAVAIL        	14
+
+# undef PAM_CRED_EXPIRED
+# define PAM_CRED_EXPIRED        	15
+
+# undef PAM_CRED_ERR
+# define PAM_CRED_ERR            	16
+
+# undef PAM_ACCT_EXPIRED
+# define PAM_ACCT_EXPIRED        	17
+
+# undef PAM_AUTHTOK_EXPIRED
+# define PAM_AUTHTOK_EXPIRED     	18
+
+# undef PAM_SESSION_ERR
+# define PAM_SESSION_ERR         	19
+
+# undef PAM_AUTHTOK_ERR
+# define PAM_AUTHTOK_ERR           	20
+
+# undef PAM_AUTHTOK_RECOVERY_ERR
+# define PAM_AUTHTOK_RECOVERY_ERR  	21
+
+# undef PAM_AUTHTOK_LOCK_BUSY
+# define PAM_AUTHTOK_LOCK_BUSY     	22
+
+# undef PAM_AUTHTOK_DISABLE_AGING
+# define PAM_AUTHTOK_DISABLE_AGING 	23
+
+# undef PAM_NO_MODULE_DATA
+# define PAM_NO_MODULE_DATA      	24
+
+# undef PAM_IGNORE
+# define PAM_IGNORE              	25
+
+# undef PAM_ABORT
+# define PAM_ABORT               	26
+
+# undef PAM_TRY_AGAIN
+# define PAM_TRY_AGAIN           	27
+
+#endif /* _SECURITY__PAM_TYPES_H */
+
+#else
+
+/* For compatibility with old Linux-PAM implementations. */
+#define PAM_AUTHTOK_RECOVER_ERR PAM_AUTHTOK_RECOVERY_ERR
+
+#endif /* defined(solaris) || (defined(__SVR4) && defined(sun)) */
+
+#endif /* _PAM_COMPAT_H */
diff --git a/libpam/include/security/_pam_macros.h b/libpam/include/security/_pam_macros.h
new file mode 100644
index 0000000..e891e22
--- /dev/null
+++ b/libpam/include/security/_pam_macros.h
@@ -0,0 +1,196 @@
+#ifndef PAM_MACROS_H
+#define PAM_MACROS_H
+
+/*
+ * All kind of macros used by PAM, but usable in some other
+ * programs too.
+ * Organized by Cristian Gafton <gafton@redhat.com>
+ */
+
+/* a 'safe' version of strdup */
+
+#include <stdlib.h>
+#include <string.h>
+
+#define  x_strdup(s)  ( (s) ? strdup(s):NULL )
+
+/* Good policy to strike out passwords with some characters not just
+   free the memory */
+
+#define _pam_overwrite(x)        \
+do {                             \
+     register char *__xx__;      \
+     if ((__xx__=(x)))           \
+          while (*__xx__)        \
+               *__xx__++ = '\0'; \
+} while (0)
+
+#define _pam_overwrite_n(x,n)   \
+do {                             \
+     register char *__xx__;      \
+     register unsigned int __i__ = 0;    \
+     if ((__xx__=(x)))           \
+        for (;__i__<n; __i__++) \
+            __xx__[__i__] = 0; \
+} while (0)
+
+/*
+ * Don't just free it, forget it too.
+ */
+
+#define _pam_drop(X) \
+do {                 \
+    if (X) {         \
+        free(X);     \
+        X=NULL;      \
+    }                \
+} while (0)
+
+#define _pam_drop_reply(/* struct pam_response * */ reply, /* int */ replies) \
+do {                                              \
+    int reply_i;                                  \
+                                                  \
+    for (reply_i=0; reply_i<replies; ++reply_i) { \
+	if (reply[reply_i].resp) {                \
+	    _pam_overwrite(reply[reply_i].resp);  \
+	    free(reply[reply_i].resp);            \
+	}                                         \
+    }                                             \
+    if (reply)                                    \
+	free(reply);                              \
+} while (0)
+
+/* some debugging code */
+
+#ifdef PAM_DEBUG
+
+/*
+ * This provides the necessary function to do debugging in PAM.
+ * Cristian Gafton <gafton@redhat.com>
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+/*
+ * This is for debugging purposes ONLY. DO NOT use on live systems !!!
+ * You have been warned :-) - CG
+ *
+ * to get automated debugging to the log file, it must be created manually.
+ * _PAM_LOGFILE must exist and be writable to the programs you debug.
+ */
+
+#ifndef _PAM_LOGFILE
+#define _PAM_LOGFILE "/var/run/pam-debug.log"
+#endif
+
+static void _pam_output_debug_info(const char *file, const char *fn
+				   , const int line)
+{
+    FILE *logfile;
+    int must_close = 1, fd;
+
+#ifdef O_NOFOLLOW
+    if ((fd = open(_PAM_LOGFILE, O_WRONLY|O_NOFOLLOW|O_APPEND)) != -1) {
+#else
+    if ((fd = open(_PAM_LOGFILE, O_WRONLY|O_APPEND)) != -1) {
+#endif
+	if (!(logfile = fdopen(fd,"a"))) {
+	    logfile = stderr;
+	    must_close = 0;
+	    close(fd);
+	}
+    } else {
+        logfile = stderr;
+	must_close = 0;
+    }
+    fprintf(logfile,"[%s:%s(%d)] ",file, fn, line);
+    fflush(logfile);
+    if (must_close)
+        fclose(logfile);
+}
+
+static void _pam_output_debug(const char *format, ...)
+{
+    va_list args;
+    FILE *logfile;
+    int must_close = 1, fd;
+
+    va_start(args, format);
+
+#ifdef O_NOFOLLOW
+    if ((fd = open(_PAM_LOGFILE, O_WRONLY|O_NOFOLLOW|O_APPEND)) != -1) {
+#else
+    if ((fd = open(_PAM_LOGFILE, O_WRONLY|O_APPEND)) != -1) {
+#endif
+	if (!(logfile = fdopen(fd,"a"))) {
+	    logfile = stderr;
+	    must_close = 0;
+	    close(fd);
+	}
+    } else {
+	logfile = stderr;
+	must_close = 0;
+    }
+    vfprintf(logfile, format, args);
+    fprintf(logfile, "\n");
+    fflush(logfile);
+    if (must_close)
+        fclose(logfile);
+
+    va_end(args);
+}
+
+#define D(x) do { \
+    _pam_output_debug_info(__FILE__, __FUNCTION__, __LINE__); \
+    _pam_output_debug x ; \
+} while (0)
+
+#define _pam_show_mem(X,XS) do {                                      \
+      int i;                                                          \
+      register unsigned char *x;                                      \
+      x = (unsigned char *)X;                                         \
+      fprintf(stderr, "  <start at %p>\n", X);                        \
+      for (i = 0; i < XS ; ++x, ++i) {                                \
+          fprintf(stderr, "    %02X. <%p:%02X>\n", i, x, *x);         \
+      }                                                               \
+      fprintf(stderr, "  <end for %p after %d bytes>\n", X, XS);      \
+} while (0)
+
+#define _pam_show_reply(/* struct pam_response * */reply, /* int */replies) \
+do {                                                                        \
+    int reply_i;                                                            \
+    setbuf(stderr, NULL);                                                   \
+    fprintf(stderr, "array at %p of size %d\n",reply,replies);              \
+    fflush(stderr);                                                         \
+    if (reply) {                                                            \
+	for (reply_i = 0; reply_i < replies; reply_i++) {                   \
+	    fprintf(stderr, "  elem# %d at %p: resp = %p, retcode = %d\n",  \
+		    reply_i, reply+reply_i, reply[reply_i].resp,            \
+		    reply[reply_i].resp, _retcode);                         \
+	    fflush(stderr);                                                 \
+	    if (reply[reply_i].resp) {                                      \
+		fprintf(stderr, "    resp[%d] = '%s'\n",                    \
+			strlen(reply[reply_i].resp), reply[reply_i].resp);  \
+		fflush(stderr);                                             \
+	    }                                                               \
+	}                                                                   \
+    }                                                                       \
+    fprintf(stderr, "done here\n");                                         \
+    fflush(stderr);                                                         \
+} while (0)
+
+#else
+
+#define D(x)                             do { } while (0)
+#define _pam_show_mem(X,XS)              do { } while (0)
+#define _pam_show_reply(reply, replies)  do { } while (0)
+
+#endif /* PAM_DEBUG */
+
+#endif  /* PAM_MACROS_H */
diff --git a/libpam/include/security/_pam_types.h b/libpam/include/security/_pam_types.h
new file mode 100644
index 0000000..2abb7ee
--- /dev/null
+++ b/libpam/include/security/_pam_types.h
@@ -0,0 +1,333 @@
+/*
+ * <security/_pam_types.h>
+ *
+ * This file defines all of the types common to the Linux-PAM library
+ * applications and modules.
+ *
+ * Note, the copyright+license information is at end of file.
+ */
+
+#ifndef _SECURITY__PAM_TYPES_H
+#define _SECURITY__PAM_TYPES_H
+
+/* This is a blind structure; users aren't allowed to see inside a
+ * pam_handle_t, so we don't define struct pam_handle here.  This is
+ * defined in a file private to the PAM library.  (i.e., it's private
+ * to PAM service modules, too!)  */
+
+typedef struct pam_handle pam_handle_t;
+
+/* ---------------- The Linux-PAM Version defines ----------------- */
+
+/* Major and minor version number of the Linux-PAM package.  Use
+   these macros to test for features in specific releases.  */
+#define __LINUX_PAM__ 1
+#define __LINUX_PAM_MINOR__ 0
+
+/* ----------------- The Linux-PAM return values ------------------ */
+
+#define PAM_SUCCESS 0		/* Successful function return */
+#define PAM_OPEN_ERR 1		/* dlopen() failure when dynamically */
+				/* loading a service module */
+#define PAM_SYMBOL_ERR 2	/* Symbol not found */
+#define PAM_SERVICE_ERR 3	/* Error in service module */
+#define PAM_SYSTEM_ERR 4	/* System error */
+#define PAM_BUF_ERR 5		/* Memory buffer error */
+#define PAM_PERM_DENIED 6	/* Permission denied */
+#define PAM_AUTH_ERR 7		/* Authentication failure */
+#define PAM_CRED_INSUFFICIENT 8	/* Can not access authentication data */
+				/* due to insufficient credentials */
+#define PAM_AUTHINFO_UNAVAIL 9	/* Underlying authentication service */
+				/* can not retrieve authentication */
+				/* information  */
+#define PAM_USER_UNKNOWN 10	/* User not known to the underlying */
+				/* authentication module */
+#define PAM_MAXTRIES 11		/* An authentication service has */
+				/* maintained a retry count which has */
+				/* been reached.  No further retries */
+				/* should be attempted */
+#define PAM_NEW_AUTHTOK_REQD 12	/* New authentication token required. */
+				/* This is normally returned if the */
+				/* machine security policies require */
+				/* that the password should be changed */
+				/* because the password is NULL or it */
+				/* has aged */
+#define PAM_ACCT_EXPIRED 13	/* User account has expired */
+#define PAM_SESSION_ERR 14	/* Can not make/remove an entry for */
+				/* the specified session */
+#define PAM_CRED_UNAVAIL 15	/* Underlying authentication service */
+				/* can not retrieve user credentials */
+                                /* unavailable */
+#define PAM_CRED_EXPIRED 16	/* User credentials expired */
+#define PAM_CRED_ERR 17		/* Failure setting user credentials */
+#define PAM_NO_MODULE_DATA 18	/* No module specific data is present */
+#define PAM_CONV_ERR 19		/* Conversation error */
+#define PAM_AUTHTOK_ERR 20	/* Authentication token manipulation error */
+#define PAM_AUTHTOK_RECOVERY_ERR 21 /* Authentication information */
+				    /* cannot be recovered */
+#define PAM_AUTHTOK_LOCK_BUSY 22   /* Authentication token lock busy */
+#define PAM_AUTHTOK_DISABLE_AGING 23 /* Authentication token aging disabled */
+#define PAM_TRY_AGAIN 24	/* Preliminary check by password service */
+#define PAM_IGNORE 25		/* Ignore underlying account module */
+				/* regardless of whether the control */
+				/* flag is required, optional, or sufficient */
+#define PAM_ABORT 26            /* Critical error (?module fail now request) */
+#define PAM_AUTHTOK_EXPIRED  27 /* user's authentication token has expired */
+#define PAM_MODULE_UNKNOWN   28 /* module is not known */
+
+#define PAM_BAD_ITEM         29 /* Bad item passed to pam_*_item() */
+#define PAM_CONV_AGAIN       30 /* conversation function is event driven
+				     and data is not available yet */
+#define PAM_INCOMPLETE       31 /* please call this function again to
+				   complete authentication stack. Before
+				   calling again, verify that conversation
+				   is completed */
+
+/*
+ * Add new #define's here - take care to also extend the libpam code:
+ * pam_strerror() and "libpam/pam_tokens.h" .
+ */
+
+#define _PAM_RETURN_VALUES 32   /* this is the number of return values */
+
+
+/* ---------------------- The Linux-PAM flags -------------------- */
+
+/* Authentication service should not generate any messages */
+#define PAM_SILENT			0x8000U
+
+/* Note: these flags are used by pam_authenticate{,_secondary}() */
+
+/* The authentication service should return PAM_AUTH_ERROR if the
+ * user has a null authentication token */
+#define PAM_DISALLOW_NULL_AUTHTOK	0x0001U
+
+/* Note: these flags are used for pam_setcred() */
+
+/* Set user credentials for an authentication service */
+#define PAM_ESTABLISH_CRED              0x0002U
+
+/* Delete user credentials associated with an authentication service */
+#define PAM_DELETE_CRED                 0x0004U
+
+/* Reinitialize user credentials */
+#define PAM_REINITIALIZE_CRED           0x0008U
+
+/* Extend lifetime of user credentials */
+#define PAM_REFRESH_CRED                0x0010U
+
+/* Note: these flags are used by pam_chauthtok */
+
+/* The password service should only update those passwords that have
+ * aged.  If this flag is not passed, the password service should
+ * update all passwords. */
+#define PAM_CHANGE_EXPIRED_AUTHTOK	0x0020U
+
+/* ------------------ The Linux-PAM item types ------------------- */
+
+/* These defines are used by pam_set_item() and pam_get_item().
+   Please check the spec which are allowed for use by applications
+   and which are only allowed for use by modules. */
+
+#define PAM_SERVICE	   1	/* The service name */
+#define PAM_USER           2	/* The user name */
+#define PAM_TTY            3	/* The tty name */
+#define PAM_RHOST          4	/* The remote host name */
+#define PAM_CONV           5	/* The pam_conv structure */
+#define PAM_AUTHTOK        6	/* The authentication token (password) */
+#define PAM_OLDAUTHTOK     7	/* The old authentication token */
+#define PAM_RUSER          8	/* The remote user name */
+#define PAM_USER_PROMPT    9    /* the prompt for getting a username */
+/* Linux-PAM extensions */
+#define PAM_FAIL_DELAY     10   /* app supplied function to override failure
+				   delays */
+#define PAM_XDISPLAY       11   /* X display name */
+#define PAM_XAUTHDATA      12   /* X server authentication data */
+#define PAM_AUTHTOK_TYPE   13   /* The type for pam_get_authtok */
+
+/* -------------- Special defines used by Linux-PAM -------------- */
+
+#if defined(__GNUC__) && defined(__GNUC_MINOR__)
+# define PAM_GNUC_PREREQ(maj, min) \
+        ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+#else
+# define PAM_GNUC_PREREQ(maj, min) 0
+#endif
+
+#if PAM_GNUC_PREREQ(2,5)
+# define PAM_FORMAT(params) __attribute__((__format__ params))
+#else
+# define PAM_FORMAT(params)
+#endif
+
+#if PAM_GNUC_PREREQ(3,3) && !defined(LIBPAM_COMPILE)
+# define PAM_NONNULL(params) __attribute__((__nonnull__ params))
+#else
+# define PAM_NONNULL(params)
+#endif
+
+/* ---------- Common Linux-PAM application/module PI ----------- */
+
+extern int PAM_NONNULL((1))
+pam_set_item(pam_handle_t *pamh, int item_type, const void *item);
+
+extern int PAM_NONNULL((1))
+pam_get_item(const pam_handle_t *pamh, int item_type, const void **item);
+
+extern const char *
+pam_strerror(pam_handle_t *pamh, int errnum);
+
+extern int PAM_NONNULL((1,2))
+pam_putenv(pam_handle_t *pamh, const char *name_value);
+
+extern const char * PAM_NONNULL((1,2))
+pam_getenv(pam_handle_t *pamh, const char *name);
+
+extern char ** PAM_NONNULL((1))
+pam_getenvlist(pam_handle_t *pamh);
+
+/* ---------- Common Linux-PAM application/module PI ----------- */
+
+/*
+ * here are some proposed error status definitions for the
+ * 'error_status' argument used by the cleanup function associated
+ * with data items they should be logically OR'd with the error_status
+ * of the latest return from libpam -- new with .52 and positive
+ * impression from Sun although not official as of 1996/9/4
+ * [generally the other flags are to be found in pam_modules.h]
+ */
+
+#define PAM_DATA_SILENT    0x40000000     /* used to suppress messages... */
+
+/*
+ * here we define an externally (by apps or modules) callable function
+ * that primes the libpam library to delay when a stacked set of
+ * modules results in a failure. In the case of PAM_SUCCESS this delay
+ * is ignored.
+ *
+ * Note, the pam_[gs]et_item(... PAM_FAIL_DELAY ...) can be used to set
+ * a function pointer which can override the default fail-delay behavior.
+ * This item was added to accommodate event driven programs that need to
+ * manage delays more carefully.  The function prototype for this data
+ * item is
+ *     void (*fail_delay)(int status, unsigned int delay, void *appdata_ptr);
+ */
+
+#define HAVE_PAM_FAIL_DELAY
+extern int pam_fail_delay(pam_handle_t *pamh, unsigned int musec_delay);
+
+/* ------------ The Linux-PAM conversation structures ------------ */
+
+/* Message styles */
+
+#define PAM_PROMPT_ECHO_OFF	1
+#define PAM_PROMPT_ECHO_ON	2
+#define PAM_ERROR_MSG		3
+#define PAM_TEXT_INFO		4
+
+/* Linux-PAM specific types */
+
+#define PAM_RADIO_TYPE          5        /* yes/no/maybe conditionals */
+
+/* This is for server client non-human interaction.. these are NOT
+   part of the X/Open PAM specification. */
+
+#define PAM_BINARY_PROMPT       7
+
+/* maximum size of messages/responses etc.. (these are mostly
+   arbitrary so Linux-PAM should handle longer values). */
+
+#define PAM_MAX_NUM_MSG       32
+#define PAM_MAX_MSG_SIZE      512
+#define PAM_MAX_RESP_SIZE     512
+
+/* Used to pass prompting text, error messages, or other informatory
+ * text to the user.  This structure is allocated and freed by the PAM
+ * library (or loaded module).  */
+
+struct pam_message {
+    int msg_style;
+    const char *msg;
+};
+
+/* if the pam_message.msg_style = PAM_BINARY_PROMPT
+   the 'pam_message.msg' is a pointer to a 'const *' for the following
+   pseudo-structure.  When used with a PAM_BINARY_PROMPT, the returned
+   pam_response.resp pointer points to an object with the following
+   structure:
+
+   struct {
+       u32 length;                         #  network byte order
+       unsigned char type;
+       unsigned char data[length-5];
+   };
+
+   The 'libpamc' library is designed around this flavor of
+   message and should be used to handle this flavor of msg_style.
+   */
+
+/* Used to return the user's response to the PAM library.  This
+   structure is allocated by the application program, and free()'d by
+   the Linux-PAM library (or calling module).  */
+
+struct pam_response {
+    char *resp;
+    int	resp_retcode;	/* currently un-used, zero expected */
+};
+
+/* The actual conversation structure itself */
+
+struct pam_conv {
+    int (*conv)(int num_msg, const struct pam_message **msg,
+		struct pam_response **resp, void *appdata_ptr);
+    void *appdata_ptr;
+};
+
+/* Used by the PAM_XAUTHDATA pam item.  Contains X authentication
+   data used by modules to connect to the user's X display.  Note:
+   this structure is intentionally compatible with xcb_auth_info_t. */
+
+struct pam_xauth_data {
+    int namelen;
+    char *name;
+    int datalen;
+    char *data;
+};
+
+/* ... adapted from the pam_appl.h file created by Theodore Ts'o and
+ *
+ * Copyright Theodore Ts'o, 1996.  All rights reserved.
+ * Copyright (c) Andrew G. Morgan <morgan@linux.kernel.org>, 1996-8
+ *
+ * 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.  */
+
+#endif /* _SECURITY__PAM_TYPES_H */
diff --git a/libpam/include/security/pam_appl.h b/libpam/include/security/pam_appl.h
new file mode 100644
index 0000000..cf97a49
--- /dev/null
+++ b/libpam/include/security/pam_appl.h
@@ -0,0 +1,104 @@
+/*
+ * <security/pam_appl.h>
+ *
+ * This header file collects definitions for the PAM API --- that is,
+ * public interface between the PAM library and an application program
+ * that wishes to use it.
+ *
+ * Note, the copyright information is at end of file.
+ */
+
+#ifndef _SECURITY_PAM_APPL_H
+#define _SECURITY_PAM_APPL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <security/_pam_types.h>      /* Linux-PAM common defined types */
+
+/* -------------- The Linux-PAM Framework layer API ------------- */
+
+extern int PAM_NONNULL((1,3,4))
+pam_start(const char *service_name, const char *user,
+	  const struct pam_conv *pam_conversation,
+	  pam_handle_t **pamh);
+
+extern int PAM_NONNULL((1,3,5))
+pam_start_confdir(const char *service_name, const char *user,
+		  const struct pam_conv *pam_conversation,
+		  const char *confdir, pam_handle_t **pamh);
+
+extern int PAM_NONNULL((1))
+pam_end(pam_handle_t *pamh, int pam_status);
+
+/* Authentication API's */
+
+extern int PAM_NONNULL((1))
+pam_authenticate(pam_handle_t *pamh, int flags);
+
+extern int PAM_NONNULL((1))
+pam_setcred(pam_handle_t *pamh, int flags);
+
+/* Account Management API's */
+
+extern int PAM_NONNULL((1))
+pam_acct_mgmt(pam_handle_t *pamh, int flags);
+
+/* Session Management API's */
+
+extern int PAM_NONNULL((1))
+pam_open_session(pam_handle_t *pamh, int flags);
+
+extern int PAM_NONNULL((1))
+pam_close_session(pam_handle_t *pamh, int flags);
+
+/* Password Management API's */
+
+extern int PAM_NONNULL((1))
+pam_chauthtok(pam_handle_t *pamh, int flags);
+
+
+/* take care of any compatibility issues */
+#include <security/_pam_compat.h>
+
+#ifdef __cplusplus
+}
+#endif
+
+/*
+ * Copyright Theodore Ts'o, 1996.  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.
+ */
+
+#endif /* _SECURITY_PAM_APPL_H */
diff --git a/libpam/include/security/pam_ext.h b/libpam/include/security/pam_ext.h
new file mode 100644
index 0000000..7542861
--- /dev/null
+++ b/libpam/include/security/pam_ext.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2005, 2006, 2008, 2009 Thorsten Kukuk.
+ *
+ * <security/pam_ext.h>
+ *
+ * This header file collects definitions for the extended PAM API.
+ * This is a public interface of the PAM library for PAM modules,
+ * which makes the life of PAM developers easier, but are not documented
+ * in any standard and are not portable between different PAM
+ * implementations.
+ *
+ * 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.
+ */
+
+#ifndef _SECURITY__PAM_EXT_H_
+#define _SECURITY__PAM_EXT_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <security/_pam_types.h>
+#include <stdarg.h>
+
+extern void PAM_FORMAT((printf, 3, 0)) PAM_NONNULL((3))
+pam_vsyslog (const pam_handle_t *pamh, int priority,
+             const char *fmt, va_list args);
+
+extern void PAM_FORMAT((printf, 3, 4)) PAM_NONNULL((3))
+pam_syslog (const pam_handle_t *pamh, int priority, const char *fmt, ...);
+
+extern int PAM_FORMAT((printf, 4, 0)) PAM_NONNULL((1,4))
+pam_vprompt (pam_handle_t *pamh, int style, char **response,
+	     const char *fmt, va_list args);
+
+extern int PAM_FORMAT((printf, 4, 5)) PAM_NONNULL((1,4))
+pam_prompt (pam_handle_t *pamh, int style, char **response,
+	    const char *fmt, ...);
+
+#define pam_error(pamh, fmt...) \
+	pam_prompt(pamh, PAM_ERROR_MSG, NULL, fmt)
+#define pam_verror(pamh, fmt, args) \
+	pam_vprompt(pamh, PAM_ERROR_MSG, NULL, fmt, args)
+
+#define pam_info(pamh, fmt...) pam_prompt(pamh, PAM_TEXT_INFO, NULL, fmt)
+#define pam_vinfo(pamh, fmt, args) pam_vprompt(pamh, PAM_TEXT_INFO, NULL, fmt, args)
+
+extern int PAM_NONNULL((1,3))
+pam_get_authtok (pam_handle_t *pamh, int item, const char **authtok,
+		 const char *prompt);
+extern int PAM_NONNULL((1,2))
+pam_get_authtok_noverify (pam_handle_t *pamh, const char **authtok,
+			  const char *prompt);
+extern int PAM_NONNULL((1,2))
+pam_get_authtok_verify (pam_handle_t *pamh, const char **authtok,
+			const char *prompt);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/libpam/include/security/pam_modules.h b/libpam/include/security/pam_modules.h
new file mode 100644
index 0000000..ec65e3e
--- /dev/null
+++ b/libpam/include/security/pam_modules.h
@@ -0,0 +1,124 @@
+/*
+ * <security/pam_modules.h>
+ *
+ * This header file collects definitions for the PAM API --- that is,
+ * public interface between the PAM library and PAM modules.
+ *
+ * Note, the copyright information is at end of file.
+ */
+
+#ifndef _SECURITY_PAM_MODULES_H
+#define _SECURITY_PAM_MODULES_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <security/_pam_types.h>      /* Linux-PAM common defined types */
+
+/* -------------- The Linux-PAM Module PI ------------- */
+
+extern int PAM_NONNULL((1,2))
+pam_set_data(pam_handle_t *pamh, const char *module_data_name, void *data,
+	     void (*cleanup)(pam_handle_t *pamh, void *data,
+			     int error_status));
+
+extern int PAM_NONNULL((1,2,3))
+pam_get_data(const pam_handle_t *pamh, const char *module_data_name,
+	     const void **data);
+
+extern int PAM_NONNULL((1,2))
+pam_get_user(pam_handle_t *pamh, const char **user, const char *prompt);
+
+/* Authentication API's */
+int pam_sm_authenticate(pam_handle_t *pamh, int flags,
+                        int argc, const char **argv);
+int pam_sm_setcred(pam_handle_t *pamh, int flags,
+		   int argc, const char **argv);
+
+/* Account Management API's */
+int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
+		     int argc, const char **argv);
+
+/* Session Management API's */
+int pam_sm_open_session(pam_handle_t *pamh, int flags,
+			int argc, const char **argv);
+
+int pam_sm_close_session(pam_handle_t *pamh, int flags,
+			 int argc, const char **argv);
+
+/* Password Management API's */
+int pam_sm_chauthtok(pam_handle_t *pamh, int flags,
+		     int argc, const char **argv);
+
+/* The following two flags are for use across the Linux-PAM/module
+ * interface only. The Application is not permitted to use these
+ * tokens.
+ *
+ * The password service should only perform preliminary checks.  No
+ * passwords should be updated. */
+#define PAM_PRELIM_CHECK		0x4000
+
+/* The password service should update passwords Note: PAM_PRELIM_CHECK
+ * and PAM_UPDATE_AUTHTOK cannot both be set simultaneously! */
+#define PAM_UPDATE_AUTHTOK		0x2000
+
+
+/*
+ * here are some proposed error status definitions for the
+ * 'error_status' argument used by the cleanup function associated
+ * with data items they should be logically OR'd with the error_status
+ * of the latest return from libpam -- new with .52 and positive
+ * impression from Sun although not official as of 1996/9/4 there are
+ * others in _pam_types.h -- they are for common module/app use.
+ */
+
+#define PAM_DATA_REPLACE   0x20000000     /* used when replacing a data item */
+
+/* PAM_EXTERN isn't needed anymore, but don't remove it to not break
+   lot of external code using it. */
+#define PAM_EXTERN extern
+
+/* take care of any compatibility issues */
+#include <security/_pam_compat.h>
+
+#ifdef __cplusplus
+}
+#endif
+
+/* Copyright (C) Theodore Ts'o, 1996.
+ * Copyright (C) Andrew Morgan, 1996-8.
+ *                                                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 General Public License, in which case the provisions of the
+ * GNU GPL are required INSTEAD OF the above restrictions.  (This
+ * clause is necessary due to a potential bad interaction between the
+ * GNU 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.  */
+
+#endif /* _SECURITY_PAM_MODULES_H */
diff --git a/libpam/include/security/pam_modutil.h b/libpam/include/security/pam_modutil.h
new file mode 100644
index 0000000..3a6aec6
--- /dev/null
+++ b/libpam/include/security/pam_modutil.h
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2001-2002 Andrew Morgan <morgan@kernel.org>
+ *
+ * <security/pam_modutil.h>
+ *
+ * This file is a list of handy libc wrappers that attempt to provide some
+ * thread-safe and other convenient functionality to modules in a common form.
+ *
+ * A number of these functions reserve space in a pam_[sg]et_data item.
+ * In all cases, the name of the item is prefixed with "pam_modutil_*".
+ *
+ * On systems that simply can't support thread safe programming, these
+ * functions don't support it either - sorry.
+ *
+ * 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.
+ */
+
+#ifndef _SECURITY__PAM_MODUTIL_H
+#define _SECURITY__PAM_MODUTIL_H
+
+#include <sys/types.h>
+#include <pwd.h>
+#include <grp.h>
+#include <shadow.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <security/_pam_types.h>
+
+extern struct passwd * PAM_NONNULL((1,2))
+pam_modutil_getpwnam(pam_handle_t *pamh, const char *user);
+
+extern struct passwd * PAM_NONNULL((1))
+pam_modutil_getpwuid(pam_handle_t *pamh, uid_t uid);
+
+extern struct group  * PAM_NONNULL((1,2))
+pam_modutil_getgrnam(pam_handle_t *pamh, const char *group);
+
+extern struct group  * PAM_NONNULL((1))
+pam_modutil_getgrgid(pam_handle_t *pamh, gid_t gid);
+
+extern struct spwd   * PAM_NONNULL((1,2))
+pam_modutil_getspnam(pam_handle_t *pamh, const char *user);
+
+extern int PAM_NONNULL((1,2,3))
+pam_modutil_user_in_group_nam_nam(pam_handle_t *pamh,
+                                  const char *user,
+                                  const char *group);
+
+extern int PAM_NONNULL((1,2))
+pam_modutil_user_in_group_nam_gid(pam_handle_t *pamh,
+                                  const char *user,
+                                  gid_t group);
+
+extern int PAM_NONNULL((1,3))
+pam_modutil_user_in_group_uid_nam(pam_handle_t *pamh,
+                                  uid_t user,
+                                  const char *group);
+
+extern int PAM_NONNULL((1))
+pam_modutil_user_in_group_uid_gid(pam_handle_t *pamh,
+                                  uid_t user,
+                                  gid_t group);
+
+extern const char * PAM_NONNULL((1))
+pam_modutil_getlogin(pam_handle_t *pamh);
+
+extern int
+pam_modutil_read(int fd, char *buffer, int count);
+
+extern int
+pam_modutil_write(int fd, const char *buffer, int count);
+
+extern int PAM_NONNULL((1,3))
+pam_modutil_audit_write(pam_handle_t *pamh, int type,
+			const char *message, int retval);
+
+struct pam_modutil_privs {
+	gid_t *grplist;
+	int number_of_groups;
+	int allocated;
+	gid_t old_gid;
+	uid_t old_uid;
+	int is_dropped;
+};
+
+#define PAM_MODUTIL_NGROUPS     64
+#define PAM_MODUTIL_DEF_PRIVS(n) \
+	gid_t n##_grplist[PAM_MODUTIL_NGROUPS]; \
+	struct pam_modutil_privs n = { n##_grplist, PAM_MODUTIL_NGROUPS, 0, -1, -1, 0 }
+
+extern int PAM_NONNULL((1,2,3))
+pam_modutil_drop_priv(pam_handle_t *pamh,
+		      struct pam_modutil_privs *p,
+		      const struct passwd *pw);
+
+extern int PAM_NONNULL((1,2))
+pam_modutil_regain_priv(pam_handle_t *pamh,
+		      struct pam_modutil_privs *p);
+
+enum pam_modutil_redirect_fd {
+	PAM_MODUTIL_IGNORE_FD,	/* do not redirect */
+	PAM_MODUTIL_PIPE_FD,	/* redirect to a pipe */
+	PAM_MODUTIL_NULL_FD,	/* redirect to /dev/null */
+};
+
+/* redirect standard descriptors, close all other descriptors. */
+extern int PAM_NONNULL((1))
+pam_modutil_sanitize_helper_fds(pam_handle_t *pamh,
+				enum pam_modutil_redirect_fd redirect_stdin,
+				enum pam_modutil_redirect_fd redirect_stdout,
+				enum pam_modutil_redirect_fd redirect_stderr);
+
+/* lookup a value for key in login.defs file or similar key value format */
+extern char * PAM_NONNULL((1,2,3))
+pam_modutil_search_key(pam_handle_t *pamh,
+		       const char *file_name,
+		       const char *key);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SECURITY__PAM_MODUTIL_H */
diff --git a/libpam/include/test_assert.h b/libpam/include/test_assert.h
new file mode 100644
index 0000000..9d30d62
--- /dev/null
+++ b/libpam/include/test_assert.h
@@ -0,0 +1,55 @@
+/*
+ * Assert definitions for tests.
+ *
+ * Copyright (c) 2020 Dmitry V. Levin <ldv@altlinux.org>
+ */
+
+#ifndef TEST_ASSERT_H
+# define TEST_ASSERT_H
+
+# ifdef HAVE_CONFIG_H
+#  include <config.h>
+# endif
+
+# include <stdio.h>
+# include <stdlib.h>
+
+# define ASSERT_(expected_, expected_str_, op_, seen_, seen_str_)		\
+	do {									\
+		__typeof__(expected_) e_ = (expected_);				\
+		__typeof__(seen_) s_ = (seen_);					\
+		if (e_ op_ s_) break;						\
+		fprintf(stderr,							\
+			"%s:%d: Assertion failed: %s (%#lx) %s %s (%#lx)\n",	\
+			__FILE__, __LINE__,					\
+			(expected_str_), (unsigned long) e_, #op_,		\
+			(seen_str_), (unsigned long) s_);			\
+		abort();							\
+	} while (0)								\
+/* End of ASSERT_ definition.  */
+
+# define ASSERT_EQ(expected_, seen_)						\
+	ASSERT_((expected_), #expected_, ==, (seen_), #seen_)			\
+/* End of ASSERT_EQ definition.  */
+
+# define ASSERT_NE(expected_, seen_)						\
+	ASSERT_((expected_), #expected_, !=, (seen_), #seen_)			\
+/* End of ASSERT_NE definition.  */
+
+# define ASSERT_LT(expected_, seen_)						\
+	ASSERT_((expected_), #expected_, <, (seen_), #seen_)			\
+/* End of ASSERT_LT definition.  */
+
+# define ASSERT_LE(expected_, seen_)						\
+	ASSERT_((expected_), #expected_, <=, (seen_), #seen_)			\
+/* End of ASSERT_LT definition.  */
+
+# define ASSERT_GT(expected_, seen_)						\
+	ASSERT_((expected_), #expected_, >, (seen_), #seen_)			\
+/* End of ASSERT_LT definition.  */
+
+# define ASSERT_GE(expected_, seen_)						\
+	ASSERT_((expected_), #expected_, >=, (seen_), #seen_)			\
+/* End of ASSERT_LT definition.  */
+
+#endif /* TEST_ASSERT_H */