Adding upstream version 1.5.2.upstream/1.5.2upstream

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

7 files changed, 1399 insertions, 0 deletions

diff --git a/libpam_misc/Makefile.am b/libpam_misc/Makefile.am
new file mode 100644
index 0000000..4f01d32
--- /dev/null
+++ b/libpam_misc/Makefile.am
@@ -0,0 +1,26 @@
+#
+# Copyright (c) 2005 Thorsten Kukuk <kukuk@suse.de>
+#
+
+CLEANFILES = *~
+
+EXTRA_DIST = libpam_misc.map
+
+include_HEADERS = include/security/pam_misc.h
+
+AM_CFLAGS = -I$(top_srcdir)/libpam/include \
+	-I$(top_srcdir)/libpamc/include -I$(srcdir)/include $(WARN_CFLAGS)
+
+libpam_misc_la_LDFLAGS = -no-undefined -version-info 82:1:82
+if HAVE_VERSIONING
+  libpam_misc_la_LDFLAGS += -Wl,--version-script=$(srcdir)/libpam_misc.map
+endif
+libpam_misc_la_LIBADD = $(top_builddir)/libpam/libpam.la
+
+lib_LTLIBRARIES = libpam_misc.la
+
+libpam_misc_la_SOURCES = help_env.c misc_conv.c
+
+# Pkg-config script.
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = pam_misc.pc
diff --git a/libpam_misc/Makefile.in b/libpam_misc/Makefile.in
new file mode 100644
index 0000000..9ce0691
--- /dev/null
+++ b/libpam_misc/Makefile.in
@@ -0,0 +1,806 @@
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+	done
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+	fi
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+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
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+	-rm -f ./$(DEPDIR)/misc_conv.Plo
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+	clean-generic clean-libLTLIBRARIES clean-libtool cscopelist-am \
+	ctags ctags-am distclean distclean-compile distclean-generic \
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+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/libpam_misc/help_env.c b/libpam_misc/help_env.c
new file mode 100644
index 0000000..601c5f4
--- /dev/null
+++ b/libpam_misc/help_env.c
@@ -0,0 +1,88 @@
+/*
+ * $Id$
+ *
+ * This file was written by Andrew G. Morgan <morgan@parc.power.net>
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <security/pam_misc.h>
+
+/*
+ * This function should be used to carefully dispose of the copied
+ * environment.
+ *
+ *     usage:     env = pam_misc_drop_env(env);
+ */
+
+char **pam_misc_drop_env(char **dump)
+{
+    int i;
+
+    for (i=0; dump[i] != NULL; ++i) {
+	D(("dump[%d]=`%s'", i, dump[i]));
+	_pam_overwrite(dump[i]);
+	_pam_drop(dump[i]);
+    }
+    _pam_drop(dump);
+
+    return NULL;
+}
+
+/*
+ *  This function takes the supplied environment and uploads it to be
+ *  the PAM one.
+ */
+
+int pam_misc_paste_env(pam_handle_t *pamh, const char * const * user_env)
+{
+    for (; user_env && *user_env; ++user_env) {
+	int retval;
+
+	D(("uploading: %s", *user_env));
+	retval = pam_putenv(pamh, *user_env);
+	if (retval != PAM_SUCCESS) {
+	    D(("error setting %s: %s", *user_env, pam_strerror(pamh,retval)));
+	    return retval;
+	}
+    }
+    D(("done."));
+    return PAM_SUCCESS;
+}
+
+/*
+ * This is a wrapper to make pam behave in the way that setenv() does.
+ */
+
+int pam_misc_setenv(pam_handle_t *pamh, const char *name
+		    , const char *value, int readonly)
+{
+    char *tmp;
+    int retval;
+
+    if (readonly) {
+	const char *etmp;
+
+	/* we check if the variable is there already */
+	etmp = pam_getenv(pamh, name);
+	if (etmp != NULL) {
+	    D(("failed to set readonly variable: %s", name));
+	    return PAM_PERM_DENIED;          /* not allowed to overwrite */
+	}
+    }
+    if (asprintf(&tmp, "%s=%s", name, value) >= 0) {
+	D(("pam_putt()ing: %s", tmp));
+	retval = pam_putenv(pamh, tmp);
+	_pam_overwrite(tmp);                 /* purge */
+	_pam_drop(tmp);                      /* forget */
+    } else {
+	D(("malloc failure"));
+	retval = PAM_BUF_ERR;
+    }
+
+    return retval;
+}
diff --git a/libpam_misc/include/security/pam_misc.h b/libpam_misc/include/security/pam_misc.h
new file mode 100644
index 0000000..fca2422
--- /dev/null
+++ b/libpam_misc/include/security/pam_misc.h
@@ -0,0 +1,52 @@
+/* $Id$ */
+
+#ifndef __PAMMISC_H
+#define __PAMMISC_H
+
+#include <security/pam_appl.h>
+#include <security/pam_client.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* include some useful macros */
+
+#include <security/_pam_macros.h>
+
+/* functions defined in pam_misc.* libraries */
+
+extern int misc_conv(int num_msg, const struct pam_message **msgm,
+		     struct pam_response **response, void *appdata_ptr);
+
+#include <time.h>
+
+extern time_t pam_misc_conv_warn_time; /* time that we should warn user */
+extern time_t pam_misc_conv_die_time;         /* cut-off time for input */
+extern const char *pam_misc_conv_warn_line;           /* warning notice */
+extern const char *pam_misc_conv_die_line;            /* cut-off remark */
+extern int pam_misc_conv_died;      /* 1 = cut-off time reached (0 not) */
+extern int (*pam_binary_handler_fn)(void *appdata, pamc_bp_t *prompt_p);
+extern void (*pam_binary_handler_free)(void *appdata, pamc_bp_t *prompt_p);
+/*
+ * Environment helper functions
+ */
+
+/* transcribe given environment (to pam) */
+extern int pam_misc_paste_env(pam_handle_t *pamh
+			      , const char * const * user_env);
+
+/* delete environment as obtained from (pam_getenvlist) */
+extern char **pam_misc_drop_env(char **env);
+
+/* provide something like the POSIX setenv function for the (Linux-)PAM
+ * environment. */
+
+extern int pam_misc_setenv(pam_handle_t *pamh, const char *name
+			   , const char *value, int readonly);
+
+#ifdef __cplusplus
+}
+#endif /* def __cplusplus */
+
+#endif /* ndef __PAMMISC_H */
diff --git a/libpam_misc/libpam_misc.map b/libpam_misc/libpam_misc.map
new file mode 100644
index 0000000..2f28d5c
--- /dev/null
+++ b/libpam_misc/libpam_misc.map
@@ -0,0 +1,17 @@
+LIBPAM_MISC_1.0 {
+  global:
+    misc_conv;
+    pam_misc_conv_warn_time;
+    pam_misc_conv_die_time;
+    pam_misc_conv_warn_line;
+    pam_misc_conv_die_line;
+    pam_misc_conv_died;
+    pam_binary_handler_fn;
+    pam_binary_handler_free;
+    pam_misc_paste_env;
+    pam_misc_drop_env;
+    pam_misc_setenv;
+
+  local:
+    *;
+};
diff --git a/libpam_misc/misc_conv.c b/libpam_misc/misc_conv.c
new file mode 100644
index 0000000..908ee89
--- /dev/null
+++ b/libpam_misc/misc_conv.c
@@ -0,0 +1,401 @@
+/*
+ * A generic conversation function for text based applications
+ *
+ * Written by Andrew Morgan <morgan@linux.kernel.org>
+ */
+
+#include "config.h"
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <termios.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <security/pam_appl.h>
+#include <security/pam_misc.h>
+
+#define INPUTSIZE PAM_MISC_CONV_BUFSIZE      /* maximum length of input+1 */
+#define CONV_ECHO_ON  1                            /* types of echo state */
+#define CONV_ECHO_OFF 0
+
+/*
+ * external timeout definitions - these can be overridden by the
+ * application.
+ */
+
+time_t pam_misc_conv_warn_time = 0;                  /* time when we warn */
+time_t pam_misc_conv_die_time  = 0;               /* time when we timeout */
+
+const char *pam_misc_conv_warn_line = N_("...Time is running out...\n");
+const char *pam_misc_conv_die_line  = N_("...Sorry, your time is up!\n");
+
+int pam_misc_conv_died=0;       /* application can probe this for timeout */
+
+/*
+ * These functions are for binary prompt manipulation.
+ * The manner in which a binary prompt is processed is application
+ * specific, so these function pointers are provided and can be
+ * initialized by the application prior to the conversation function
+ * being used.
+ */
+
+static void pam_misc_conv_delete_binary(void *appdata UNUSED,
+					pamc_bp_t *delete_me)
+{
+    PAM_BP_RENEW(delete_me, 0, 0);
+}
+
+int (*pam_binary_handler_fn)(void *appdata, pamc_bp_t *prompt_p) = NULL;
+void (*pam_binary_handler_free)(void *appdata, pamc_bp_t *prompt_p)
+      = pam_misc_conv_delete_binary;
+
+/* the following code is used to get text input */
+
+static volatile int expired=0;
+
+/* return to the previous signal handling */
+static void reset_alarm(struct sigaction *o_ptr)
+{
+    (void) alarm(0);                 /* stop alarm clock - if still ticking */
+    (void) sigaction(SIGALRM, o_ptr, NULL);
+}
+
+/* this is where we intercept the alarm signal */
+static void time_is_up(int ignore UNUSED)
+{
+    expired = 1;
+}
+
+/* set the new alarm to hit the time_is_up() function */
+static int set_alarm(int delay, struct sigaction *o_ptr)
+{
+    struct sigaction new_sig;
+
+    sigemptyset(&new_sig.sa_mask);
+    new_sig.sa_flags = 0;
+    new_sig.sa_handler = time_is_up;
+    if ( sigaction(SIGALRM, &new_sig, o_ptr) ) {
+	return 1;         /* setting signal failed */
+    }
+    if ( alarm(delay) ) {
+	(void) sigaction(SIGALRM, o_ptr, NULL);
+	return 1;         /* failed to set alarm */
+    }
+    return 0;             /* all seems to have worked */
+}
+
+/* return the number of seconds to next alarm. 0 = no delay, -1 = expired */
+static int get_delay(void)
+{
+    time_t now;
+
+    expired = 0;                                        /* reset flag */
+    (void) time(&now);
+
+    /* has the quit time past? */
+    if (pam_misc_conv_die_time && now >= pam_misc_conv_die_time) {
+	fprintf(stderr,"%s",pam_misc_conv_die_line);
+
+	pam_misc_conv_died = 1;       /* note we do not reset the die_time */
+	return -1;                                           /* time is up */
+    }
+
+    /* has the warning time past? */
+    if (pam_misc_conv_warn_time && now >= pam_misc_conv_warn_time) {
+	fprintf(stderr, "%s", pam_misc_conv_warn_line);
+	pam_misc_conv_warn_time = 0;                    /* reset warn_time */
+
+	/* indicate remaining delay - if any */
+
+	return (pam_misc_conv_die_time ? pam_misc_conv_die_time - now:0 );
+    }
+
+    /* indicate possible warning delay */
+
+    if (pam_misc_conv_warn_time)
+	return (pam_misc_conv_warn_time - now);
+    else if (pam_misc_conv_die_time)
+	return (pam_misc_conv_die_time - now);
+    else
+	return 0;
+}
+
+/* read a line of input string, giving prompt when appropriate */
+static int read_string(int echo, const char *prompt, char **retstr)
+{
+    struct termios term_before, term_tmp;
+    char line[INPUTSIZE];
+    struct sigaction old_sig;
+    int delay, nc = -1, have_term = 0;
+    sigset_t oset, nset;
+
+    D(("called with echo='%s', prompt='%s'.", echo ? "ON":"OFF" , prompt));
+
+    if (isatty(STDIN_FILENO)) {                      /* terminal state */
+
+	/* is a terminal so record settings and flush it */
+	if ( tcgetattr(STDIN_FILENO, &term_before) != 0 ) {
+	    D(("<error: failed to get terminal settings>"));
+	    *retstr = NULL;
+	    return -1;
+	}
+	memcpy(&term_tmp, &term_before, sizeof(term_tmp));
+	if (!echo) {
+	    term_tmp.c_lflag &= ~(ECHO);
+	}
+	have_term = 1;
+
+	/*
+	 * We make a simple attempt to block TTY signals from suspending
+	 * the conversation without giving PAM a chance to clean up.
+	 */
+
+	sigemptyset(&nset);
+	sigaddset(&nset, SIGTSTP);
+	(void) sigprocmask(SIG_BLOCK, &nset, &oset);
+
+    } else if (!echo) {
+	D(("<warning: cannot turn echo off>"));
+    }
+
+    /* set up the signal handling */
+    delay = get_delay();
+
+    /* reading the line */
+    while (delay >= 0) {
+	/* this may, or may not set echo off -- drop pending input */
+	if (have_term)
+	    (void) tcsetattr(STDIN_FILENO, TCSAFLUSH, &term_tmp);
+
+	fprintf(stderr, "%s", prompt);
+
+	if ( delay > 0 && set_alarm(delay, &old_sig) ) {
+	    D(("<failed to set alarm>"));
+	    break;
+	} else {
+	    if (have_term)
+		nc = read(STDIN_FILENO, line, INPUTSIZE-1);
+	    else                             /* we must read one line only */
+		for (nc = 0; nc < INPUTSIZE-1 && (nc?line[nc-1]:0) != '\n';
+		     nc++) {
+		    int rv;
+		    if ((rv=read(STDIN_FILENO, line+nc, 1)) != 1) {
+			if (rv < 0) {
+			    _pam_overwrite_n(line, (unsigned int) nc);
+			    nc = rv;
+			}
+			break;
+		    }
+		}
+	    if (have_term) {
+		(void) tcsetattr(STDIN_FILENO, TCSADRAIN, &term_before);
+		if (!echo || expired)             /* do we need a newline? */
+		    fprintf(stderr, "\n");
+	    }
+	    if ( delay > 0 ) {
+		reset_alarm(&old_sig);
+	    }
+	    if (expired) {
+		delay = get_delay();
+	    } else if (nc > 0) {                 /* we got some user input */
+		D(("we got some user input"));
+
+		if (line[nc-1] == '\n') {     /* <NUL> terminate */
+		    line[--nc] = '\0';
+		} else {
+		    if (echo) {
+			fprintf(stderr, "\n");
+		    }
+		    line[nc] = '\0';
+		}
+		*retstr = strdup(line);
+		_pam_overwrite(line);
+		if (!*retstr) {
+		    D(("no memory for response string"));
+		    nc = -1;
+		}
+
+		goto cleanexit;                /* return malloc()ed string */
+
+	    } else if (nc == 0) {                                /* Ctrl-D */
+		D(("user did not want to type anything"));
+
+		*retstr = NULL;
+		if (echo) {
+		    fprintf(stderr, "\n");
+		}
+		goto cleanexit;                /* return malloc()ed "" */
+	    } else if (nc == -1) {
+		/* Don't loop forever if read() returns -1. */
+		D(("error reading input from the user: %m"));
+		if (echo) {
+		    fprintf(stderr, "\n");
+		}
+		*retstr = NULL;
+		goto cleanexit;                /* return NULL */
+	    }
+	}
+    }
+
+    /* getting here implies that the timer expired */
+
+    D(("the timer appears to have expired"));
+
+    *retstr = NULL;
+    _pam_overwrite_n(line, sizeof(line));
+
+ cleanexit:
+
+    if (have_term) {
+	(void) sigprocmask(SIG_SETMASK, &oset, NULL);
+	(void) tcsetattr(STDIN_FILENO, TCSAFLUSH, &term_before);
+    }
+
+    return nc;
+}
+
+/* end of read_string functions */
+
+/*
+ * This conversation function is supposed to be a generic PAM one.
+ * Unfortunately, it is _not_ completely compatible with the Solaris PAM
+ * codebase.
+ *
+ * Namely, for msgm's that contain multiple prompts, this function
+ * interprets "const struct pam_message **msgm" as equivalent to
+ * "const struct pam_message *msgm[]". The Solaris module
+ * implementation interprets the **msgm object as a pointer to a
+ * pointer to an array of "struct pam_message" objects (that is, a
+ * confusing amount of pointer indirection).
+ */
+
+int misc_conv(int num_msg, const struct pam_message **msgm,
+	      struct pam_response **response, void *appdata_ptr)
+{
+    int count=0;
+    struct pam_response *reply;
+
+    if (num_msg <= 0)
+	return PAM_CONV_ERR;
+
+    D(("allocating empty response structure array."));
+
+    reply = (struct pam_response *) calloc(num_msg,
+					   sizeof(struct pam_response));
+    if (reply == NULL) {
+	D(("no memory for responses"));
+	return PAM_CONV_ERR;
+    }
+
+    D(("entering conversation function."));
+
+    for (count=0; count < num_msg; ++count) {
+	char *string=NULL;
+	int nc;
+
+	switch (msgm[count]->msg_style) {
+	case PAM_PROMPT_ECHO_OFF:
+	    nc = read_string(CONV_ECHO_OFF,msgm[count]->msg, &string);
+	    if (nc < 0) {
+		goto failed_conversation;
+	    }
+	    break;
+	case PAM_PROMPT_ECHO_ON:
+	    nc = read_string(CONV_ECHO_ON,msgm[count]->msg, &string);
+	    if (nc < 0) {
+		goto failed_conversation;
+	    }
+	    break;
+	case PAM_ERROR_MSG:
+	    if (fprintf(stderr,"%s\n",msgm[count]->msg) < 0) {
+		goto failed_conversation;
+	    }
+	    break;
+	case PAM_TEXT_INFO:
+	    if (fprintf(stdout,"%s\n",msgm[count]->msg) < 0) {
+		goto failed_conversation;
+	    }
+	    break;
+	case PAM_BINARY_PROMPT:
+	{
+	    pamc_bp_t binary_prompt = NULL;
+
+	    if (!msgm[count]->msg || !pam_binary_handler_fn) {
+		goto failed_conversation;
+	    }
+
+	    PAM_BP_RENEW(&binary_prompt,
+			 PAM_BP_RCONTROL(msgm[count]->msg),
+			 PAM_BP_LENGTH(msgm[count]->msg));
+	    PAM_BP_FILL(binary_prompt, 0, PAM_BP_LENGTH(msgm[count]->msg),
+			PAM_BP_RDATA(msgm[count]->msg));
+
+	    if (pam_binary_handler_fn(appdata_ptr,
+				      &binary_prompt) != PAM_SUCCESS
+		|| (binary_prompt == NULL)) {
+		goto failed_conversation;
+	    }
+	    string = (char *) binary_prompt;
+	    binary_prompt = NULL;
+
+	    break;
+	}
+	default:
+	    fprintf(stderr, _("erroneous conversation (%d)\n"),
+		   msgm[count]->msg_style);
+	    goto failed_conversation;
+	}
+
+	if (string) {                         /* must add to reply array */
+	    /* add string to list of responses */
+
+	    reply[count].resp_retcode = 0;
+	    reply[count].resp = string;
+	    string = NULL;
+	}
+    }
+
+    *response = reply;
+    reply = NULL;
+
+    return PAM_SUCCESS;
+
+failed_conversation:
+
+    D(("the conversation failed"));
+
+    if (reply) {
+	for (count=0; count<num_msg; ++count) {
+	    if (reply[count].resp == NULL) {
+		continue;
+	    }
+	    switch (msgm[count]->msg_style) {
+	    case PAM_PROMPT_ECHO_ON:
+	    case PAM_PROMPT_ECHO_OFF:
+		_pam_overwrite(reply[count].resp);
+		free(reply[count].resp);
+		break;
+	    case PAM_BINARY_PROMPT:
+	      {
+		void *bt_ptr = reply[count].resp;
+		pam_binary_handler_free(appdata_ptr, bt_ptr);
+		break;
+	      }
+	    case PAM_ERROR_MSG:
+	    case PAM_TEXT_INFO:
+		/* should not actually be able to get here... */
+		free(reply[count].resp);
+	    }
+	    reply[count].resp = NULL;
+	}
+	/* forget reply too */
+	free(reply);
+	reply = NULL;
+    }
+
+    return PAM_CONV_ERR;
+}
diff --git a/libpam_misc/pam_misc.pc.in b/libpam_misc/pam_misc.pc.in
new file mode 100644
index 0000000..0c8898c
--- /dev/null
+++ b/libpam_misc/pam_misc.pc.in
@@ -0,0 +1,9 @@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: pam_misc
+Description: Miscellaneous functions that make the job of writing PAM-aware applications easier.
+URL: http://www.linux-pam.org/
+Version: @VERSION@
+Cflags: -I${includedir}
+Libs: -L${libdir} -lpam_misc