diff -Nur php-4.3.11/README.input_filter hardened-php-4.3.11-0.2.7/README.input_filter
--- php-4.3.11/README.input_filter	1970-01-01 01:00:00.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/README.input_filter	2005-04-07 02:08:26.000000000 +0200
@@ -0,0 +1,193 @@
+Input Filter Support ported from PHP 5
+--------------------------------------
+
+XSS (Cross Site Scripting) hacks are becoming more and more prevalent,
+and can be quite difficult to prevent.  Whenever you accept user data
+and somehow display this data back to users, you are likely vulnerable
+to XSS hacks.
+
+The Input Filter support in PHP 5 is aimed at providing the framework
+through which a company-wide or site-wide security policy can be
+enforced.  It is implemented as a SAPI hook and is called from the
+treat_data and post handler functions.  To implement your own security
+policy you will need to write a standard PHP extension.  
+
+A simple implementation might look like the following.  This stores the
+original raw user data and adds a my_get_raw() function while the normal
+$_POST, $_GET and $_COOKIE arrays are only populated with stripped
+data.  In this simple example all I am doing is calling strip_tags() on
+the data.  If register_globals is turned on, the default globals that
+are created will be stripped ($foo) while a $RAW_foo is created with the
+original user input.
+
+ZEND_BEGIN_MODULE_GLOBALS(my_input_filter)
+        zval *post_array;
+        zval *get_array;
+        zval *cookie_array;
+ZEND_END_MODULE_GLOBALS(my_input_filter)
+
+#ifdef ZTS
+#define IF_G(v) TSRMG(my_input_filter_globals_id, zend_my_input_filter_globals *, v)
+#else
+#define IF_G(v) (my_input_filter_globals.v)
+#endif
+
+ZEND_DECLARE_MODULE_GLOBALS(my_input_filter)
+
+function_entry my_input_filter_functions[] = {
+    PHP_FE(my_get_raw,   NULL)
+    {NULL, NULL, NULL}
+};
+
+zend_module_entry my_input_filter_module_entry = {
+    STANDARD_MODULE_HEADER,
+    "my_input_filter",
+    my_input_filter_functions,
+    PHP_MINIT(my_input_filter),
+    PHP_MSHUTDOWN(my_input_filter),
+    NULL,
+    PHP_RSHUTDOWN(my_input_filter),
+    PHP_MINFO(my_input_filter),
+    "0.1",
+    STANDARD_MODULE_PROPERTIES
+};
+
+PHP_MINIT_FUNCTION(my_input_filter)
+{
+    ZEND_INIT_MODULE_GLOBALS(my_input_filter, php_my_input_filter_init_globals, NULL);
+
+    REGISTER_LONG_CONSTANT("POST", PARSE_POST, CONST_CS | CONST_PERSISTENT);
+    REGISTER_LONG_CONSTANT("GET", PARSE_GET, CONST_CS | CONST_PERSISTENT);
+    REGISTER_LONG_CONSTANT("COOKIE", PARSE_COOKIE, CONST_CS | CONST_PERSISTENT);
+
+    sapi_register_input_filter(my_sapi_input_filter);
+    return SUCCESS;
+}
+
+PHP_RSHUTDOWN_FUNCTION(my_input_filter)
+{
+    if(IF_G(get_array)) {
+        zval_ptr_dtor(&IF_G(get_array));
+        IF_G(get_array) = NULL;
+    }
+    if(IF_G(post_array)) {
+        zval_ptr_dtor(&IF_G(post_array));
+        IF_G(post_array) = NULL;
+    }
+    if(IF_G(cookie_array)) {
+        zval_ptr_dtor(&IF_G(cookie_array));
+        IF_G(cookie_array) = NULL;
+    }
+    return SUCCESS;
+}
+
+PHP_MINFO_FUNCTION(my_input_filter)
+{
+    php_info_print_table_start();
+    php_info_print_table_row( 2, "My Input Filter Support", "enabled" );
+    php_info_print_table_row( 2, "Revision", "$Revision: 1.1 $");
+    php_info_print_table_end();
+}
+
+/* The filter handler. If you return 1 from it, then PHP also registers the
+ * (modified) variable. Returning 0 prevents PHP from registering the variable;
+ * you can use this if your filter already registers the variable under a
+ * different name, or if you just don't want the variable registered at all. */
+SAPI_INPUT_FILTER_FUNC(my_sapi_input_filter)
+{
+    zval new_var;
+    zval *array_ptr = NULL;
+    char *raw_var;
+    int var_len;
+
+    assert(*val != NULL);
+
+    switch(arg) {
+        case PARSE_GET:
+            if(!IF_G(get_array)) {
+                ALLOC_ZVAL(array_ptr);
+                array_init(array_ptr);
+                INIT_PZVAL(array_ptr);
+            }
+            IF_G(get_array) = array_ptr;
+            break;
+        case PARSE_POST:
+            if(!IF_G(post_array)) {
+                ALLOC_ZVAL(array_ptr);
+                array_init(array_ptr);
+                INIT_PZVAL(array_ptr);
+            }
+            IF_G(post_array) = array_ptr;
+            break;
+        case PARSE_COOKIE:
+            if(!IF_G(cookie_array)) {
+                ALLOC_ZVAL(array_ptr);
+                array_init(array_ptr);
+                INIT_PZVAL(array_ptr);
+            }
+            IF_G(cookie_array) = array_ptr;
+            break;
+    }
+    Z_STRLEN(new_var) = val_len;
+    Z_STRVAL(new_var) = estrndup(*val, val_len);
+    Z_TYPE(new_var) = IS_STRING;
+
+    var_len = strlen(var);
+    raw_var = emalloc(var_len+5);  /* RAW_ and a \0 */
+    strcpy(raw_var, "RAW_");
+    strlcat(raw_var,var,var_len+5);
+
+    php_register_variable_ex(raw_var, &new_var, array_ptr TSRMLS_DC);
+
+    php_strip_tags(*val, val_len, NULL, NULL, 0);
+
+    *new_val_len = strlen(*val);
+    return 1;
+}
+
+PHP_FUNCTION(my_get_raw)
+{
+    long arg;
+    char *var;
+    int var_len;
+    zval **tmp;
+    zval *array_ptr = NULL;
+    HashTable *hash_ptr;
+    char *raw_var;
+
+    if(zend_parse_parameters(2 TSRMLS_CC, "ls", &arg, &var, &var_len) == FAILURE) {
+        return;
+    }
+
+    switch(arg) {
+        case PARSE_GET:
+            array_ptr = IF_G(get_array);
+            break;
+        case PARSE_POST:
+            array_ptr = IF_G(post_array);
+            break;
+        case PARSE_COOKIE:
+            array_ptr = IF_G(post_array);
+            break;
+    }
+
+    if(!array_ptr) RETURN_FALSE;
+
+    /*
+     * I'm changing the variable name here because when running with register_globals on,
+     * the variable will end up in the global symbol table
+     */
+    raw_var = emalloc(var_len+5);  /* RAW_ and a \0 */
+    strcpy(raw_var, "RAW_");
+    strlcat(raw_var,var,var_len+5);
+    hash_ptr = HASH_OF(array_ptr);
+
+    if(zend_hash_find(hash_ptr, raw_var, var_len+5, (void **)&tmp) == SUCCESS) {
+        *return_value = **tmp;
+        zval_copy_ctor(return_value);
+    } else {
+        RETVAL_FALSE;
+    }
+    efree(raw_var);
+}
+
diff -Nur php-4.3.11/TSRM/TSRM.h hardened-php-4.3.11-0.2.7/TSRM/TSRM.h
--- php-4.3.11/TSRM/TSRM.h	2005-02-11 04:34:04.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/TSRM/TSRM.h	2005-04-07 02:08:26.000000000 +0200
@@ -33,6 +33,13 @@
 #	define TSRM_API
 #endif
 
+#if HARDENED_PHP
+# if HAVE_REALPATH
+#  undef realpath
+#  define realpath php_realpath
+# endif
+#endif
+
 /* Only compile multi-threading functions if we're in ZTS mode */
 #ifdef ZTS
 
@@ -90,6 +97,7 @@
 
 #define THREAD_HASH_OF(thr,ts)  (unsigned long)thr%(unsigned long)ts
 
+
 #ifdef __cplusplus
 extern "C" {
 #endif
diff -Nur php-4.3.11/TSRM/tsrm_virtual_cwd.c hardened-php-4.3.11-0.2.7/TSRM/tsrm_virtual_cwd.c
--- php-4.3.11/TSRM/tsrm_virtual_cwd.c	2005-02-11 04:34:04.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/TSRM/tsrm_virtual_cwd.c	2005-04-07 02:08:26.000000000 +0200
@@ -192,6 +192,165 @@
     return p;
 }
 
+#if HARDENED_PHP
+CWD_API char *php_realpath(const char *path, char *resolved)
+{
+        struct stat sb;
+        char *p, *q, *s;
+        size_t left_len, resolved_len;
+        unsigned symlinks;
+        int serrno, slen;
+        int is_dir = 1;
+        char left[PATH_MAX], next_token[PATH_MAX], symlink[PATH_MAX];
+
+        serrno = errno;
+        symlinks = 0;
+        if (path[0] == '/') {
+                resolved[0] = '/';
+                resolved[1] = '\0';
+                if (path[1] == '\0')
+                        return (resolved);
+                resolved_len = 1;
+                left_len = strlcpy(left, path + 1, sizeof(left));
+        } else {
+                if (getcwd(resolved, PATH_MAX) == NULL) {
+                        strlcpy(resolved, ".", PATH_MAX);
+                        return (NULL);
+                }
+                resolved_len = strlen(resolved);
+                left_len = strlcpy(left, path, sizeof(left));
+        }
+        if (left_len >= sizeof(left) || resolved_len >= PATH_MAX) {
+                errno = ENAMETOOLONG;
+                return (NULL);
+        }
+
+        /*
+         * Iterate over path components in `left'.
+         */
+        while (left_len != 0) {
+                /*
+                 * Extract the next path component and adjust `left'
+                 * and its length.
+                 */
+                p = strchr(left, '/');
+                s = p ? p : left + left_len;
+                if (s - left >= sizeof(next_token)) {
+                        errno = ENAMETOOLONG;
+                        return (NULL);
+                }
+                memcpy(next_token, left, s - left);
+                next_token[s - left] = '\0';
+                left_len -= s - left;
+                if (p != NULL)
+                        memmove(left, s + 1, left_len + 1);
+                if (resolved[resolved_len - 1] != '/') {
+                        if (resolved_len + 1 >= PATH_MAX) {
+                                errno = ENAMETOOLONG;
+                                return (NULL);
+                        }
+                        resolved[resolved_len++] = '/';
+                        resolved[resolved_len] = '\0';
+                }
+                if (next_token[0] == '\0')
+                        continue;
+                else if (strcmp(next_token, ".") == 0)
+                        continue;
+                else if (strcmp(next_token, "..") == 0) {
+                        /*
+                         * Strip the last path component except when we have
+                         * single "/"
+                         */
+                        if (!is_dir) {
+                                errno = ENOENT;
+                                return (NULL);
+                        }
+                        if (resolved_len > 1) {
+                                resolved[resolved_len - 1] = '\0';
+                                q = strrchr(resolved, '/');
+                                *q = '\0';
+                                resolved_len = q - resolved;
+                        }
+                        continue;
+                }
+
+                /*
+                 * Append the next path component and lstat() it. If
+                 * lstat() fails we still can return successfully if
+                 * there are no more path components left.
+                 */
+                resolved_len = strlcat(resolved, next_token, PATH_MAX);
+                if (resolved_len >= PATH_MAX) {
+                        errno = ENAMETOOLONG;
+                        return (NULL);
+                }
+                if (lstat(resolved, &sb) != 0) {
+                        if (errno == ENOENT && p == NULL) {
+                                errno = serrno;
+                                return (resolved);
+                        }
+                        return (NULL);
+                }
+                if (S_ISLNK(sb.st_mode)) {
+                        if (symlinks++ > MAXSYMLINKS) {
+                                errno = ELOOP;
+                                return (NULL);
+                        }
+                        slen = readlink(resolved, symlink, sizeof(symlink) - 1);
+                        if (slen < 0)
+                                return (NULL);
+                        symlink[slen] = '\0';
+                        if (symlink[0] == '/') {
+                                resolved[1] = 0;
+                                resolved_len = 1;
+                        } else if (resolved_len > 1) {
+                                /* Strip the last path component. */
+                                resolved[resolved_len - 1] = '\0';
+                                q = strrchr(resolved, '/');
+                                *q = '\0';
+                                resolved_len = q - resolved;
+                        }
+
+                        /*
+                         * If there are any path components left, then
+                         * append them to symlink. The result is placed
+                         * in `left'.
+                         */
+                        if (p != NULL) {
+                                if (symlink[slen - 1] != '/') {
+                                        if (slen + 1 >= sizeof(symlink)) {
+                                                errno = ENAMETOOLONG;
+                                                return (NULL);
+                                        }
+                                        symlink[slen] = '/';
+                                        symlink[slen + 1] = 0;
+                                }
+                                left_len = strlcat(symlink, left, sizeof(left));
+                                if (left_len >= sizeof(left)) {
+                                        errno = ENAMETOOLONG;
+                                        return (NULL);
+                                }
+                        }
+                        left_len = strlcpy(left, symlink, sizeof(left));
+                } else {
+            		if (S_ISDIR(sb.st_mode)) {
+                    		is_dir = 1;
+            		} else {
+                    		is_dir = 0;
+            		}
+		}
+        }
+
+        /*
+         * Remove trailing slash except when the resolved pathname
+         * is a single "/".
+         */
+        if (resolved_len > 1 && resolved[resolved_len - 1] == '/')
+                resolved[resolved_len - 1] = '\0';
+        return (resolved);
+}
+#endif
+
 CWD_API void virtual_cwd_startup(void)
 {
 	char cwd[MAXPATHLEN];
@@ -314,8 +473,7 @@
 				path = resolved_path;
 				path_length = strlen(path);
 			} else {
-				/* disable for now
-				return 1; */
+				return 1;
 			}
 		}
 	} else { /* Concat current directory with relative path and then run realpath() on it */
@@ -341,9 +499,8 @@
 				path = resolved_path;
 				path_length = strlen(path);
 			} else {
-				/* disable for now
 				free(tmp);
-				return 1; */
+				return 1;
 			}
 		}
 		free(tmp);
diff -Nur php-4.3.11/TSRM/tsrm_virtual_cwd.h hardened-php-4.3.11-0.2.7/TSRM/tsrm_virtual_cwd.h
--- php-4.3.11/TSRM/tsrm_virtual_cwd.h	2005-02-11 04:34:04.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/TSRM/tsrm_virtual_cwd.h	2005-04-07 02:08:26.000000000 +0200
@@ -128,6 +128,22 @@
 
 typedef int (*verify_path_func)(const cwd_state *);
 
+#ifndef HAVE_STRLCPY
+CWD_API size_t php_strlcpy(char *dst, const char *src, size_t siz);
+#undef strlcpy
+#define strlcpy php_strlcpy
+#endif
+
+#ifndef HAVE_STRLCAT
+CWD_API size_t php_strlcat(char *dst, const char *src, size_t siz);
+#undef strlcat
+#define strlcat php_strlcat
+#endif
+
+
+#if HARDENED_PHP
+CWD_API char *php_realpath(const char *path, char *resolved);
+#endif
 CWD_API void virtual_cwd_startup(void);
 CWD_API void virtual_cwd_shutdown(void);
 CWD_API char *virtual_getcwd_ex(size_t *length TSRMLS_DC);
diff -Nur php-4.3.11/Zend/zend.c hardened-php-4.3.11-0.2.7/Zend/zend.c
--- php-4.3.11/Zend/zend.c	2005-01-22 21:36:34.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/Zend/zend.c	2005-04-07 02:08:26.000000000 +0200
@@ -53,6 +53,12 @@
 ZEND_API void (*zend_unblock_interruptions)(void);
 ZEND_API void (*zend_ticks_function)(int ticks);
 ZEND_API void (*zend_error_cb)(int type, const char *error_filename, const uint error_lineno, const char *format, va_list args);
+#if HARDENED_PHP
+ZEND_API void (*zend_security_log)(char *str);
+#endif
+#if HARDENED_PHP_INC_PROTECT
+ZEND_API int (*zend_is_valid_include)(zval *z);
+#endif
 
 void (*zend_on_timeout)(int seconds TSRMLS_DC);
 
@@ -420,6 +426,14 @@
 	extern zend_scanner_globals language_scanner_globals;
 #endif
 
+	/* Set up Hardened-PHP utility functions first */
+#if HARDENED_PHP
+	zend_security_log = utility_functions->security_log_function;
+#endif
+#if HARDENED_PHP_INC_PROTECT
+	zend_is_valid_include = utility_functions->is_valid_include;
+#endif
+
 #ifdef ZTS
 	ts_allocate_id(&alloc_globals_id, sizeof(zend_alloc_globals), (ts_allocate_ctor) alloc_globals_ctor, (ts_allocate_dtor) alloc_globals_dtor);
 #else
diff -Nur php-4.3.11/Zend/zend.h hardened-php-4.3.11-0.2.7/Zend/zend.h
--- php-4.3.11/Zend/zend.h	2005-01-25 14:08:41.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/Zend/zend.h	2005-04-07 02:08:26.000000000 +0200
@@ -275,9 +275,9 @@
 struct _zval_struct {
 	/* Variable information */
 	zvalue_value value;		/* value */
+	zend_uint refcount;
 	zend_uchar type;	/* active type */
 	zend_uchar is_ref;
-	zend_ushort refcount;
 };
 
 
@@ -338,6 +338,12 @@
 	void (*ticks_function)(int ticks);
 	void (*on_timeout)(int seconds TSRMLS_DC);
 	zend_bool (*open_function)(const char *filename, struct _zend_file_handle *);
+#if HARDENED_PHP
+	void (*security_log_function)(char *str);
+#endif	
+#if HARDENED_PHP_INC_PROTECT
+	int (*is_valid_include)(zval *z);
+#endif
 } zend_utility_functions;
 
 		
@@ -469,7 +475,16 @@
 extern ZEND_API void (*zend_ticks_function)(int ticks);
 extern ZEND_API void (*zend_error_cb)(int type, const char *error_filename, const uint error_lineno, const char *format, va_list args) ZEND_ATTRIBUTE_PTR_FORMAT(printf, 4, 0);
 extern void (*zend_on_timeout)(int seconds TSRMLS_DC);
+#if HARDENED_PHP
+extern ZEND_API	void (*zend_security_log)(char *str);
+#endif	
+#if HARDENED_PHP_INC_PROTECT
+extern ZEND_API int (*zend_is_valid_include)(zval *z);
+#endif
 
+#if HARDENED_PHP_MM_PROTECT || HARDENED_PHP_LL_PROTECT || HARDENED_PHP_HASH_PROTECT
+ZEND_API unsigned int zend_canary(void);
+#endif
 
 ZEND_API void zend_error(int type, const char *format, ...) ZEND_ATTRIBUTE_PTR_FORMAT(printf, 2, 3);
 
@@ -576,6 +591,10 @@
 
 #define ZEND_MAX_RESERVED_RESOURCES	4
 
+#if HARDENED_PHP
+#include "hardened_globals.h"
+#endif
+
 #endif /* ZEND_H */
 
 /*
diff -Nur php-4.3.11/Zend/zend_alloc.c hardened-php-4.3.11-0.2.7/Zend/zend_alloc.c
--- php-4.3.11/Zend/zend_alloc.c	2004-08-27 18:51:25.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/Zend/zend_alloc.c	2005-04-07 02:11:04.000000000 +0200
@@ -56,6 +56,11 @@
 # define END_MAGIC_SIZE 0
 #endif
 
+#if HARDENED_PHP_MM_PROTECT
+# define CANARY_SIZE sizeof(unsigned int)
+#else
+# define CANARY_SIZE 0
+#endif
 
 # if MEMORY_LIMIT
 #  if ZEND_DEBUG
@@ -95,9 +100,17 @@
 	if (p==AG(head)) {							\
 		AG(head) = p->pNext;					\
 	} else {									\
+		if (p != p->pLast->pNext) {				\
+			zend_security_log("linked list corrupt on efree() - heap corruption detected"); \
+			exit(1);							\
+		}										\
 		p->pLast->pNext = p->pNext;				\
 	}											\
 	if (p->pNext) {								\
+		if (p != p->pNext->pLast) {				\
+			zend_security_log("linked list corrupt on efree() - heap corruption detected"); \
+			exit(1);							\
+		}										\
 		p->pNext->pLast = p->pLast;				\
 	}
 
@@ -129,6 +142,12 @@
 	DECLARE_CACHE_VARS();
 	TSRMLS_FETCH();
 
+#if HARDENED_PHP_MM_PROTECT
+	if (size > LONG_MAX - sizeof(zend_mem_header) - MEM_HEADER_PADDING - END_MAGIC_SIZE - CANARY_SIZE) {
+		zend_security_log("emalloc() - requested size would result in integer overflow");
+		exit(1);
+	}
+#endif
 	CALCULATE_REAL_SIZE_AND_CACHE_INDEX(size);
 
 	if (!ZEND_DISABLE_MEMORY_CACHE && (CACHE_INDEX < MAX_CACHED_MEMORY) && (AG(cache_count)[CACHE_INDEX] > 0)) {
@@ -146,6 +165,10 @@
 		AG(cache_stats)[CACHE_INDEX][1]++;
 		memcpy((((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + size), &mem_block_end_magic, sizeof(long));
 #endif
+#if HARDENED_PHP_MM_PROTECT
+		p->canary = HG(canary_1);
+		memcpy((((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + size + END_MAGIC_SIZE), &HG(canary_2), CANARY_SIZE);
+#endif
 		p->cached = 0;
 		p->size = size;
 		return (void *)((char *)p + sizeof(zend_mem_header) + MEM_HEADER_PADDING);
@@ -161,7 +184,7 @@
 			AG(allocated_memory_peak) = AG(allocated_memory);
 		}
 #endif
-		p  = (zend_mem_header *) ZEND_DO_MALLOC(sizeof(zend_mem_header) + MEM_HEADER_PADDING + SIZE + END_MAGIC_SIZE);
+		p  = (zend_mem_header *) ZEND_DO_MALLOC(sizeof(zend_mem_header) + MEM_HEADER_PADDING + SIZE + END_MAGIC_SIZE + CANARY_SIZE);
 	}
 
 	HANDLE_BLOCK_INTERRUPTIONS();
@@ -191,7 +214,10 @@
 # endif
 	memcpy((((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + size), &mem_block_end_magic, sizeof(long));
 #endif
-
+#if HARDENED_PHP_MM_PROTECT
+ 	p->canary = HG(canary_1);
+ 	memcpy((((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + size + END_MAGIC_SIZE), &HG(canary_2), CANARY_SIZE);
+#endif
 	HANDLE_UNBLOCK_INTERRUPTIONS();
 	return (void *)((char *)p + sizeof(zend_mem_header) + MEM_HEADER_PADDING);
 }
@@ -218,17 +244,33 @@
 			return emalloc_rel(lval + offset);
 		}
 	}
-
+	
+#if HARDENED_PHP
+	zend_security_log("Possible integer overflow catched by safe_emalloc()");
+#endif
 	zend_error(E_ERROR, "Possible integer overflow in memory allocation (%ld * %ld + %ld)", nmemb, size, offset);
 	return 0;
 }
 
 ZEND_API void _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
 {
+#if HARDENED_PHP_MM_PROTECT
+	unsigned int *canary_2;
+#endif
 	zend_mem_header *p = (zend_mem_header *) ((char *)ptr - sizeof(zend_mem_header) - MEM_HEADER_PADDING);
 	DECLARE_CACHE_VARS();
 	TSRMLS_FETCH();
 
+#if HARDENED_PHP_MM_PROTECT
+	canary_2 = (unsigned int *)(((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + p->size + END_MAGIC_SIZE);
+	if (p->canary != HG(canary_1) || *canary_2 != HG(canary_2)) {
+		zend_security_log("canary mismatch on efree() - heap overflow or double efree detected");
+		exit(1);
+	}
+	/* to catch double efree()s */
+	*canary_2 = p->canary = 0;
+#endif
+
 #if defined(ZTS) && TSRM_DEBUG
 	if (p->thread_id != tsrm_thread_id()) {
 		tsrm_error(TSRM_ERROR_LEVEL_ERROR, "Memory block allocated at %s:(%d) on thread %x freed at %s:(%d) on thread %x, ignoring",
@@ -273,6 +315,9 @@
 	size_t _size = nmemb * size;
     
 	if (nmemb && (_size/nmemb!=size)) {
+#if HARDENED_PHP
+		zend_security_log("Possible integer overflow catched by ecalloc()");
+#endif
 		fprintf(stderr,"FATAL:  ecalloc():  Unable to allocate %ld * %ld bytes\n", (long) nmemb, (long) size);
 #if ZEND_DEBUG && HAVE_KILL && HAVE_GETPID
 		kill(getpid(), SIGSEGV);
@@ -292,6 +337,9 @@
 
 ZEND_API void *_erealloc(void *ptr, size_t size, int allow_failure ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
 {
+#if HARDENED_PHP_MM_PROTECT
+	unsigned int canary_2;
+#endif
 	zend_mem_header *p;
 	zend_mem_header *orig;
 	DECLARE_CACHE_VARS();
@@ -303,6 +351,14 @@
 
 	p = orig = (zend_mem_header *) ((char *)ptr-sizeof(zend_mem_header)-MEM_HEADER_PADDING);
 
+#if HARDENED_PHP_MM_PROTECT
+	canary_2 = *(unsigned int *)(((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + p->size + END_MAGIC_SIZE);
+	if (p->canary != HG(canary_1) || canary_2 != HG(canary_2)) {
+		zend_security_log("canary mismatch on erealloc() - heap overflow detected");
+		exit(1);
+	}
+#endif
+
 #if defined(ZTS) && TSRM_DEBUG
 	if (p->thread_id != tsrm_thread_id()) {
 		void *new_p;
@@ -326,7 +382,7 @@
 	}
 #endif
 	REMOVE_POINTER_FROM_LIST(p);
-	p = (zend_mem_header *) ZEND_DO_REALLOC(p, sizeof(zend_mem_header)+MEM_HEADER_PADDING+SIZE+END_MAGIC_SIZE);
+	p = (zend_mem_header *) ZEND_DO_REALLOC(p, sizeof(zend_mem_header)+MEM_HEADER_PADDING+SIZE+END_MAGIC_SIZE+CANARY_SIZE);
 	if (!p) {
 		if (!allow_failure) {
 			fprintf(stderr,"FATAL:  erealloc():  Unable to allocate %ld bytes\n", (long) size);
@@ -348,6 +404,9 @@
 	memcpy((((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + size), &mem_block_end_magic, sizeof(long));
 #endif	
 
+#if HARDENED_PHP_MM_PROTECT
+ 	memcpy((((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + size + END_MAGIC_SIZE), &HG(canary_2), CANARY_SIZE);
+#endif
 	p->size = size;
 
 	HANDLE_UNBLOCK_INTERRUPTIONS();
@@ -423,6 +482,10 @@
 {
 	AG(head) = NULL;
 	
+#if HARDENED_PHP_MM_PROTECT
+	HG(canary_1) = zend_canary();
+	HG(canary_2) = zend_canary();
+#endif
 #if MEMORY_LIMIT
 	AG(memory_limit) = 1<<30;		/* ridiculous limit, effectively no limit */
 	AG(allocated_memory) = 0;
diff -Nur php-4.3.11/Zend/zend_alloc.h hardened-php-4.3.11-0.2.7/Zend/zend_alloc.h
--- php-4.3.11/Zend/zend_alloc.h	2004-08-11 08:10:46.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/Zend/zend_alloc.h	2005-04-07 02:08:26.000000000 +0200
@@ -32,6 +32,9 @@
 #define MEM_BLOCK_CACHED_MAGIC	0xFB8277DCL
 
 typedef struct _zend_mem_header {
+#if HARDENED_PHP_MM_PROTECT
+	unsigned int canary;
+#endif
 #if ZEND_DEBUG
 	long magic;
 	char *filename;
diff -Nur php-4.3.11/Zend/zend_builtin_functions.c hardened-php-4.3.11-0.2.7/Zend/zend_builtin_functions.c
--- php-4.3.11/Zend/zend_builtin_functions.c	2004-12-27 20:28:35.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/Zend/zend_builtin_functions.c	2005-04-07 02:08:26.000000000 +0200
@@ -49,6 +49,9 @@
 static ZEND_FUNCTION(crash);
 #endif
 #endif
+#if HARDENED_PHP_MM_PROTECT_DEBUG
+static ZEND_FUNCTION(heap_overflow);
+#endif
 static ZEND_FUNCTION(get_included_files);
 static ZEND_FUNCTION(is_subclass_of);
 static ZEND_FUNCTION(is_a);
@@ -101,6 +104,9 @@
 	ZEND_FE(crash,				NULL)
 #endif
 #endif
+#if HARDENED_PHP_MM_PROTECT_DEBUG
+	ZEND_FE(heap_overflow,			NULL)
+#endif
 	ZEND_FE(get_included_files,	NULL)
 	ZEND_FALIAS(get_required_files,	get_included_files,		NULL)
 	ZEND_FE(is_subclass_of,		NULL)
@@ -805,6 +811,19 @@
 
 #endif /* ZEND_DEBUG */
 
+
+#if HARDENED_PHP_MM_PROTECT_DEBUG
+ZEND_FUNCTION(heap_overflow)
+{
+	char *nowhere = emalloc(10);
+
+	memcpy(nowhere, "something1234567890", sizeof("something1234567890"));
+	
+	efree(nowhere);
+}
+#endif
+
+
 /* {{{ proto array get_included_files(void)
    Returns an array with the file names that were include_once()'d */
 ZEND_FUNCTION(get_included_files)
diff -Nur php-4.3.11/Zend/zend_canary.c hardened-php-4.3.11-0.2.7/Zend/zend_canary.c
--- php-4.3.11/Zend/zend_canary.c	1970-01-01 01:00:00.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/Zend/zend_canary.c	2005-04-07 02:08:26.000000000 +0200
@@ -0,0 +1,58 @@
+/*
+   +----------------------------------------------------------------------+
+   | Hardened-PHP                                                         |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 2004 Stefan Esser                                      |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 2.02 of the PHP license,      |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available at through the world-wide-web at                           |
+   | http://www.php.net/license/2_02.txt.                                 |
+   | If you did not receive a copy of the PHP license and are unable to   |
+   | obtain it through the world-wide-web, please send a note to          |
+   | license@php.net so we can mail you a copy immediately.               |
+   +----------------------------------------------------------------------+
+   | Author: Stefan Esser <sesser@php.net>                        |
+   +----------------------------------------------------------------------+
+ */
+/* $Id: zend_canary.c,v 1.1 2004/11/26 12:45:41 ionic Exp $ */
+
+#include "zend.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+
+#if HARDENED_PHP_MM_PROTECT || HARDENED_PHP_LL_PROTECT
+
+/* will be replaced later with more compatible method */
+ZEND_API unsigned int zend_canary()
+{
+	time_t t;
+	unsigned int canary;
+	int fd;
+	
+	fd = open("/dev/urandom", 0);
+	if (fd != -1) {
+		int r = read(fd, &canary, sizeof(canary));
+		close(fd);
+		if (r == sizeof(canary)) {
+			return (canary);
+		}
+	}
+	/* not good but we never want to do this */
+	time(&t);
+	canary = *(unsigned int *)&t + getpid() << 16;
+	return (canary);
+}
+#endif
+
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */
diff -Nur php-4.3.11/Zend/zend_execute.c hardened-php-4.3.11-0.2.7/Zend/zend_execute.c
--- php-4.3.11/Zend/zend_execute.c	2005-02-21 13:38:54.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/Zend/zend_execute.c	2005-04-07 02:08:26.000000000 +0200
@@ -2161,7 +2161,12 @@
 								int dummy = 1;
 								zend_file_handle file_handle = {0};
 
+#if HARDENED_PHP_INC_PROTECT
+								if (zend_is_valid_include(inc_filename) 
+										&& zend_open(inc_filename->value.str.val, &file_handle) == SUCCESS
+#else
 								if (zend_open(inc_filename->value.str.val, &file_handle) == SUCCESS
+#endif
 										&& ZEND_IS_VALID_FILE_HANDLE(&file_handle)) {
 
 									file_handle.filename = inc_filename->value.str.val;
@@ -2190,6 +2195,11 @@
 							break;
 						case ZEND_INCLUDE:
 						case ZEND_REQUIRE:
+#if HARDENED_PHP_INC_PROTECT
+							if (!zend_is_valid_include(inc_filename)) {
+								break;
+							}
+#endif
 							new_op_array = compile_filename(EX(opline)->op2.u.constant.value.lval, inc_filename TSRMLS_CC);
 							break;
 						case ZEND_EVAL: {
diff -Nur php-4.3.11/Zend/zend_extensions.h hardened-php-4.3.11-0.2.7/Zend/zend_extensions.h
--- php-4.3.11/Zend/zend_extensions.h	2002-12-31 17:23:02.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/Zend/zend_extensions.h	2005-04-07 02:08:26.000000000 +0200
@@ -23,7 +23,9 @@
 
 #include "zend_compile.h"
 
-#define ZEND_EXTENSION_API_NO	20021010
+/* Create own API version number for Hardened-PHP */
+
+#define ZEND_EXTENSION_API_NO	1020041222
 
 typedef struct _zend_extension_version_info {
 	int zend_extension_api_no;
diff -Nur php-4.3.11/Zend/zend_hash.c hardened-php-4.3.11-0.2.7/Zend/zend_hash.c
--- php-4.3.11/Zend/zend_hash.c	2004-07-12 23:26:46.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/Zend/zend_hash.c	2005-04-07 02:09:31.000000000 +0200
@@ -26,6 +26,17 @@
 # include <stdlib.h>
 #endif
 
+#if HARDENED_PHP_HASH_PROTECT
+	unsigned int zend_hash_canary = 0x1234567;
+	zend_bool zend_hash_canary_inited = 0;
+#endif
+
+#define CHECK_HASH_CANARY(hash) \
+	if (zend_hash_canary != (hash)->canary) { \
+		zend_security_log("Zend HashTable canary was overwritten"); \
+		exit(1); \
+	}
+
 #define HANDLE_NUMERIC(key, length, func) {												\
 	register char *tmp=key;																\
 																						\
@@ -175,6 +186,9 @@
 {
 	uint i = 3;
 	Bucket **tmp;
+#if HARDENED_PHP_HASH_PROTECT
+	TSRMLS_FETCH();	
+#endif	
 
 	SET_INCONSISTENT(HT_OK);
 
@@ -184,6 +198,13 @@
 
 	ht->nTableSize = 1 << i;
 	ht->nTableMask = ht->nTableSize - 1;
+#if HARDENED_PHP_HASH_PROTECT
+	if (zend_hash_canary_inited==0) {
+		zend_hash_canary = zend_canary();
+		zend_hash_canary_inited = 1;
+	}
+	ht->canary = zend_hash_canary;
+#endif
 	ht->pDestructor = pDestructor;
 	ht->pListHead = NULL;
 	ht->pListTail = NULL;
@@ -259,6 +280,9 @@
 				}
 #endif
 				if (ht->pDestructor) {
+#if HARDENED_PHP_HASH_PROTECT
+					CHECK_HASH_CANARY(ht);
+#endif	
 					ht->pDestructor(p->pData);
 				}
 				UPDATE_DATA(ht, p, pData, nDataSize);
@@ -327,6 +351,9 @@
 				}
 #endif
 				if (ht->pDestructor) {
+#if HARDENED_PHP_HASH_PROTECT
+					CHECK_HASH_CANARY(ht);
+#endif	
 					ht->pDestructor(p->pData);
 				}
 				UPDATE_DATA(ht, p, pData, nDataSize);
@@ -402,6 +429,9 @@
 			}
 #endif
 			if (ht->pDestructor) {
+#if HARDENED_PHP_HASH_PROTECT
+				CHECK_HASH_CANARY(ht);
+#endif	
 				ht->pDestructor(p->pData);
 			}
 			UPDATE_DATA(ht, p, pData, nDataSize);
@@ -450,7 +480,7 @@
 	IS_CONSISTENT(ht);
 
 	if ((ht->nTableSize << 1) > 0) {	/* Let's double the table size */
-		t = (Bucket **) perealloc_recoverable(ht->arBuckets, (ht->nTableSize << 1) * sizeof(Bucket *), ht->persistent);
+		t = (Bucket **) perealloc(ht->arBuckets, (ht->nTableSize << 1) * sizeof(Bucket *), ht->persistent);
 		if (t) {
 			HANDLE_BLOCK_INTERRUPTIONS();
 			ht->arBuckets = t;
@@ -460,6 +490,7 @@
 			HANDLE_UNBLOCK_INTERRUPTIONS();
 			return SUCCESS;
 		}
+		zend_error(E_ERROR, "zend_hash_do_resize - out of memory");
 		return FAILURE;
 	}
 	return SUCCESS;
@@ -524,6 +555,9 @@
 				ht->pInternalPointer = p->pListNext;
 			}
 			if (ht->pDestructor) {
+#if HARDENED_PHP_HASH_PROTECT
+				CHECK_HASH_CANARY(ht);
+#endif	
 				ht->pDestructor(p->pData);
 			}
 			if (!p->pDataPtr) {
@@ -553,6 +587,9 @@
 		q = p;
 		p = p->pListNext;
 		if (ht->pDestructor) {
+#if HARDENED_PHP_HASH_PROTECT
+			CHECK_HASH_CANARY(ht);
+#endif	
 			ht->pDestructor(q->pData);
 		}
 		if (!q->pDataPtr && q->pData) {
@@ -579,6 +616,9 @@
 		q = p;
 		p = p->pListNext;
 		if (ht->pDestructor) {
+#if HARDENED_PHP_HASH_PROTECT
+			CHECK_HASH_CANARY(ht);
+#endif	
 			ht->pDestructor(q->pData);
 		}
 		if (!q->pDataPtr && q->pData) {
@@ -608,6 +648,9 @@
 	HANDLE_BLOCK_INTERRUPTIONS();
 
 	if (ht->pDestructor) {
+#if HARDENED_PHP_HASH_PROTECT
+		CHECK_HASH_CANARY(ht);
+#endif	
 		ht->pDestructor(p->pData);
 	}
 	if (!p->pDataPtr) {
diff -Nur php-4.3.11/Zend/zend_hash.h hardened-php-4.3.11-0.2.7/Zend/zend_hash.h
--- php-4.3.11/Zend/zend_hash.h	2002-12-31 17:23:03.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/Zend/zend_hash.h	2005-04-07 02:08:26.000000000 +0200
@@ -54,6 +54,9 @@
 } Bucket;
 
 typedef struct _hashtable {
+#if HARDENED_PHP_HASH_PROTECT
+	unsigned int canary;
+#endif	
 	uint nTableSize;
 	uint nTableMask;
 	uint nNumOfElements;
diff -Nur php-4.3.11/Zend/zend_llist.c hardened-php-4.3.11-0.2.7/Zend/zend_llist.c
--- php-4.3.11/Zend/zend_llist.c	2002-12-31 17:23:04.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/Zend/zend_llist.c	2005-04-07 02:08:26.000000000 +0200
@@ -21,9 +21,34 @@
 #include "zend.h"
 #include "zend_llist.h"
 #include "zend_qsort.h"
+#include "zend_globals.h"
+
+#define CHECK_LIST_CANARY(list) \
+	if (HG(canary_3) != (list)->canary_h || HG(canary_4) != (list)->canary_t) { \
+		zend_security_log("linked list canary was overwritten"); \
+		exit(1); \
+	}
+
+#define CHECK_LISTELEMENT_CANARY(elem) \
+	if (HG(canary_3) != (elem)->canary) { \
+		zend_security_log("linked list element canary was overwritten"); \
+		exit(1); \
+	}
+
 
 ZEND_API void zend_llist_init(zend_llist *l, size_t size, llist_dtor_func_t dtor, unsigned char persistent)
 {
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();	
+	
+	if (!HG(ll_canary_inited)) {
+		HG(canary_3) = zend_canary();
+		HG(canary_4) = zend_canary();
+		HG(ll_canary_inited) = 1;
+	}
+	l->canary_h = HG(canary_3);
+	l->canary_t = HG(canary_4);
+#endif
 	l->head  = NULL;
 	l->tail  = NULL;
 	l->count = 0;
@@ -37,6 +62,11 @@
 {
 	zend_llist_element *tmp = pemalloc(sizeof(zend_llist_element)+l->size-1, l->persistent);
 
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();	
+	CHECK_LIST_CANARY(l)
+	tmp->canary = HG(canary_3);
+#endif
 	tmp->prev = l->tail;
 	tmp->next = NULL;
 	if (l->tail) {
@@ -55,6 +85,11 @@
 {
 	zend_llist_element *tmp = pemalloc(sizeof(zend_llist_element)+l->size-1, l->persistent);
 
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();	
+	CHECK_LIST_CANARY(l)
+	tmp->canary = HG(canary_3);
+#endif
 	tmp->next = l->head;
 	tmp->prev = NULL;
 	if (l->head) {
@@ -91,10 +126,20 @@
 	zend_llist_element *current=l->head;
 	zend_llist_element *next;
 
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();	
+	CHECK_LIST_CANARY(l)
+#endif
 	while (current) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(current)
+#endif
 		next = current->next;
 		if (compare(current->data, element)) {
 			DEL_LLIST_ELEMENT(current, l);
+#if HARDENED_PHP_LL_PROTECT
+			current->canary = 0;
+#endif
 			break;
 		}
 		current = next;
@@ -106,7 +151,14 @@
 {
 	zend_llist_element *current=l->head, *next;
 	
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();	
+	CHECK_LIST_CANARY(l)
+#endif
 	while (current) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(current)
+#endif
 		next = current->next;
 		if (l->dtor) {
 			l->dtor(current->data);
@@ -131,7 +183,14 @@
 	zend_llist_element *old_tail;
 	void *data;
 
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();	
+	CHECK_LIST_CANARY(l)
+#endif
 	if ((old_tail = l->tail)) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(old_tail)
+#endif
 		if (l->tail->prev) {
 			l->tail->prev->next = NULL;
 		}
@@ -157,9 +216,16 @@
 {
 	zend_llist_element *ptr;
 
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();	
+	CHECK_LIST_CANARY(src)
+#endif
 	zend_llist_init(dst, src->size, src->dtor, src->persistent);
 	ptr = src->head;
 	while (ptr) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(ptr)
+#endif
 		zend_llist_add_element(dst, ptr->data);
 		ptr = ptr->next;
 	}
@@ -170,11 +236,21 @@
 {
 	zend_llist_element *element, *next;
 
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();	
+	CHECK_LIST_CANARY(l)
+#endif
 	element=l->head;
 	while (element) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(element)
+#endif
 		next = element->next;
 		if (func(element->data)) {
 			DEL_LLIST_ELEMENT(element, l);
+#if HARDENED_PHP_LL_PROTECT
+			element->canary = 0;
+#endif
 		}
 		element = next;
 	}
@@ -185,7 +261,13 @@
 {
 	zend_llist_element *element;
 
+#if HARDENED_PHP_LL_PROTECT
+	CHECK_LIST_CANARY(l)
+#endif
 	for (element=l->head; element; element=element->next) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(element)
+#endif
 		func(element->data TSRMLS_CC);
 	}
 }
@@ -197,6 +279,9 @@
 	zend_llist_element **elements;
 	zend_llist_element *element, **ptr;
 
+#if HARDENED_PHP_LL_PROTECT
+	CHECK_LIST_CANARY(l)
+#endif
 	if (l->count <= 0) {
 		return;
 	}
@@ -206,6 +291,9 @@
 	ptr = &elements[0];
 
 	for (element=l->head; element; element=element->next) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(element)
+#endif
 		*ptr++ = element;
 	}
 
@@ -228,7 +316,13 @@
 {
 	zend_llist_element *element;
 
+#if HARDENED_PHP_LL_PROTECT
+	CHECK_LIST_CANARY(l)
+#endif
 	for (element=l->head; element; element=element->next) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(element)
+#endif
 		func(element->data, arg TSRMLS_CC);
 	}
 }
@@ -239,8 +333,14 @@
 	zend_llist_element *element;
 	va_list args;
 
+#if HARDENED_PHP_LL_PROTECT
+	CHECK_LIST_CANARY(l)
+#endif
 	va_start(args, num_args);
 	for (element=l->head; element; element=element->next) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(element)
+#endif
 		func(element->data, num_args, args TSRMLS_CC);
 	}
 	va_end(args);
@@ -249,6 +349,10 @@
 
 ZEND_API int zend_llist_count(zend_llist *l)
 {
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();
+	CHECK_LIST_CANARY(l)
+#endif
 	return l->count;
 }
     
@@ -256,8 +360,15 @@
 {
 	zend_llist_position *current = pos ? pos : &l->traverse_ptr;
 
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();
+	CHECK_LIST_CANARY(l)
+#endif
 	*current = l->head;
 	if (*current) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(*current)
+#endif
 		return (*current)->data;
 	} else {
 		return NULL;
@@ -269,8 +380,15 @@
 {
 	zend_llist_position *current = pos ? pos : &l->traverse_ptr;
 
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();
+	CHECK_LIST_CANARY(l)
+#endif
 	*current = l->tail;
 	if (*current) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(*current)
+#endif
 		return (*current)->data;
 	} else {
 		return NULL;
@@ -282,9 +400,19 @@
 {
 	zend_llist_position *current = pos ? pos : &l->traverse_ptr;
 
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();
+	CHECK_LIST_CANARY(l)
+#endif
 	if (*current) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(*current)
+#endif
 		*current = (*current)->next;
 		if (*current) {
+#if HARDENED_PHP_LL_PROTECT
+			CHECK_LISTELEMENT_CANARY(*current)
+#endif
 			return (*current)->data;
 		}
 	}
@@ -296,9 +424,19 @@
 {
 	zend_llist_position *current = pos ? pos : &l->traverse_ptr;
 
+#if HARDENED_PHP_LL_PROTECT
+	TSRMLS_FETCH();
+	CHECK_LIST_CANARY(l)
+#endif
 	if (*current) {
+#if HARDENED_PHP_LL_PROTECT
+		CHECK_LISTELEMENT_CANARY(*current)
+#endif
 		*current = (*current)->prev;
 		if (*current) {
+#if HARDENED_PHP_LL_PROTECT
+			CHECK_LISTELEMENT_CANARY(*current)
+#endif
 			return (*current)->data;
 		}
 	}
diff -Nur php-4.3.11/Zend/zend_llist.h hardened-php-4.3.11-0.2.7/Zend/zend_llist.h
--- php-4.3.11/Zend/zend_llist.h	2002-12-31 17:23:04.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/Zend/zend_llist.h	2005-04-07 02:08:26.000000000 +0200
@@ -24,6 +24,9 @@
 #include <stdlib.h>
 
 typedef struct _zend_llist_element {
+#if HARDENED_PHP_LL_PROTECT
+	unsigned int canary;
+#endif	
 	struct _zend_llist_element *next;
 	struct _zend_llist_element *prev;
 	char data[1]; /* Needs to always be last in the struct */
@@ -36,6 +39,9 @@
 typedef void (*llist_apply_func_t)(void * TSRMLS_DC);
 
 typedef struct _zend_llist {
+#if HARDENED_PHP_LL_PROTECT
+	unsigned int canary_h; /* head */
+#endif	
 	zend_llist_element *head;
 	zend_llist_element *tail;
 	size_t size;
@@ -43,6 +49,9 @@
 	llist_dtor_func_t dtor;
 	unsigned char persistent;
 	zend_llist_element *traverse_ptr;
+#if HARDENED_PHP_LL_PROTECT
+	unsigned int canary_t; /* tail */
+#endif	
 } zend_llist;
 
 typedef zend_llist_element* zend_llist_position;
diff -Nur php-4.3.11/Zend/zend_modules.h hardened-php-4.3.11-0.2.7/Zend/zend_modules.h
--- php-4.3.11/Zend/zend_modules.h	2002-12-31 17:23:04.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/Zend/zend_modules.h	2005-04-07 02:08:26.000000000 +0200
@@ -34,7 +34,7 @@
 ZEND_API extern unsigned char second_arg_force_ref[];
 ZEND_API extern unsigned char third_arg_force_ref[];
 
-#define ZEND_MODULE_API_NO 20020429
+#define ZEND_MODULE_API_NO 1020041222
 #ifdef ZTS
 #define USING_ZTS 1
 #else
diff -Nur php-4.3.11/acinclude.m4 hardened-php-4.3.11-0.2.7/acinclude.m4
--- php-4.3.11/acinclude.m4	2005-01-25 14:03:06.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/acinclude.m4	2005-04-07 02:08:26.000000000 +0200
@@ -1173,6 +1173,36 @@
   fi
 ])
 
+dnl
+dnl Check for broken realpath()
+dnl
+dnl realpath("/etc/hosts/../passwd",XXX) should not return 
+dnl "/etc/passwd"
+dnl
+AC_DEFUN([PHP_AC_BROKEN_REALPATH],[
+  AC_CACHE_CHECK(whether realpath is broken, ac_cv_broken_realpath,[
+    AC_TRY_RUN([
+main() {
+	char buf[4096+1];
+	buf[0] = 0;
+	realpath("/etc/hosts/../passwd", buf);
+	exit(strcmp(buf, "/etc/passwd")==0); 
+}
+    ],[
+      ac_cv_broken_realpath=no
+    ],[
+      ac_cv_broken_realpath=yes
+    ],[
+      ac_cv_broken_realpath=no
+    ])
+  ])
+  if test "$ac_cv_broken_realpath" = "yes"; then
+    AC_DEFINE(PHP_BROKEN_REALPATH, 1, [Whether realpath is broken])
+  else
+    AC_DEFINE(PHP_BROKEN_REALPATH, 0, [Whether realpath is broken])
+  fi
+])
+
 dnl PHP_SHARED_MODULE(module-name, object-var, build-dir, cxx)
 dnl
 dnl Basically sets up the link-stage for building module-name
diff -Nur php-4.3.11/configure hardened-php-4.3.11-0.2.7/configure
--- php-4.3.11/configure	2005-03-30 16:35:34.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/configure	2005-04-07 02:08:26.000000000 +0200
@@ -394,6 +394,16 @@
 ac_default_prefix=/usr/local
 # Any additions from configure.in:
 ac_help="$ac_help
+  --disable-hardened-php-mm-protect    Disable the Memory Manager protection."
+ac_help="$ac_help
+  --disable-hardened-php-ll-protect    Disable the Linked List protection."
+ac_help="$ac_help
+  --disable-hardened-php-inc-protect   Disable include/require protection."
+ac_help="$ac_help
+  --disable-hardened-php-fmt-protect   Disable format string protection."
+ac_help="$ac_help
+  --disable-hardened-php-hash-protect  Disable Zend HashTable DTOR protection."
+ac_help="$ac_help
 
 SAPI modules:
 "
@@ -846,6 +856,8 @@
 ac_help="$ac_help
   --disable-tokenizer     Disable tokenizer support"
 ac_help="$ac_help
+  --disable-varfilter     Disable Hardened-PHP's variable filter"
+ac_help="$ac_help
   --enable-wddx           Enable WDDX support."
 ac_help="$ac_help
   --disable-xml           Disable XML support using bundled expat lib"
@@ -2669,6 +2681,157 @@
 
 
 
+# Check whether --enable-hardened-php-mm-protect or --disable-hardened-php-mm-protect was given.
+if test "${enable_hardened_php_mm_protect+set}" = set; then
+  enableval="$enable_hardened_php_mm_protect"
+  
+  DO_HARDENED_PHP_MM_PROTECT=$enableval
+
+else
+  
+  DO_HARDENED_PHP_MM_PROTECT=yes
+
+fi
+
+
+# Check whether --enable-hardened-php-ll-protect or --disable-hardened-php-ll-protect was given.
+if test "${enable_hardened_php_ll_protect+set}" = set; then
+  enableval="$enable_hardened_php_ll_protect"
+  
+  DO_HARDENED_PHP_LL_PROTECT=$enableval
+
+else
+  
+  DO_HARDENED_PHP_LL_PROTECT=yes
+
+fi
+
+
+# Check whether --enable-hardened-php-inc-protect or --disable-hardened-php-inc-protect was given.
+if test "${enable_hardened_php_inc_protect+set}" = set; then
+  enableval="$enable_hardened_php_inc_protect"
+  
+  DO_HARDENED_PHP_INC_PROTECT=$enableval
+
+else
+  
+  DO_HARDENED_PHP_INC_PROTECT=yes
+
+fi
+
+
+# Check whether --enable-hardened-php-fmt-protect or --disable-hardened-php-fmt-protect was given.
+if test "${enable_hardened_php_fmt_protect+set}" = set; then
+  enableval="$enable_hardened_php_fmt_protect"
+  
+  DO_HARDENED_PHP_FMT_PROTECT=$enableval
+
+else
+  
+  DO_HARDENED_PHP_FMT_PROTECT=yes
+
+fi
+
+
+# Check whether --enable-hardened-php-hash-protect or --disable-hardened-php-hash-protect was given.
+if test "${enable_hardened_php_hash_protect+set}" = set; then
+  enableval="$enable_hardened_php_hash_protect"
+  
+  DO_HARDENED_PHP_HASH_PROTECT=$enableval
+
+else
+  
+  DO_HARDENED_PHP_HASH_PROTECT=yes
+
+fi
+
+
+echo $ac_n "checking whether to protect the Zend Memory Manager""... $ac_c" 1>&6
+echo "configure:2725: checking whether to protect the Zend Memory Manager" >&5
+echo "$ac_t""$DO_HARDENED_PHP_MM_PROTECT" 1>&6
+
+echo $ac_n "checking whether to protect the Zend Linked Lists""... $ac_c" 1>&6
+echo "configure:2729: checking whether to protect the Zend Linked Lists" >&5
+echo "$ac_t""$DO_HARDENED_PHP_LL_PROTECT" 1>&6
+
+echo $ac_n "checking whether to protect include/require statements""... $ac_c" 1>&6
+echo "configure:2733: checking whether to protect include/require statements" >&5
+echo "$ac_t""$DO_HARDENED_PHP_INC_PROTECT" 1>&6
+
+echo $ac_n "checking whether to protect PHP Format String functions""... $ac_c" 1>&6
+echo "configure:2737: checking whether to protect PHP Format String functions" >&5
+echo "$ac_t""$DO_HARDENED_PHP_FMT_PROTECT" 1>&6
+
+echo $ac_n "checking whether to protect the Zend HashTable Destructors""... $ac_c" 1>&6
+echo "configure:2737: checking whether to protect the Zend HashTable Destructors" >&5
+echo "$ac_t""$DO_HARDENED_PHP_HASH_PROTECT" 1>&6
+
+
+cat >> confdefs.h <<\EOF
+#define HARDENED_PHP 1
+EOF
+
+
+
+if test "$DO_HARDENED_PHP_MM_PROTECT" = "yes"; then
+  cat >> confdefs.h <<\EOF
+#define HARDENED_PHP_MM_PROTECT 1
+EOF
+
+else
+  cat >> confdefs.h <<\EOF
+#define HARDENED_PHP_MM_PROTECT 0
+EOF
+
+fi
+
+if test "$DO_HARDENED_PHP_LL_PROTECT" = "yes"; then
+  cat >> confdefs.h <<\EOF
+#define HARDENED_PHP_LL_PROTECT 1
+EOF
+
+else
+  cat >> confdefs.h <<\EOF
+#define HARDENED_PHP_LL_PROTECT 0
+EOF
+
+fi
+
+if test "$DO_HARDENED_PHP_INC_PROTECT" = "yes"; then
+  cat >> confdefs.h <<\EOF
+#define HARDENED_PHP_INC_PROTECT 1
+EOF
+
+else
+  cat >> confdefs.h <<\EOF
+#define HARDENED_PHP_INC_PROTECT 0
+EOF
+
+fi
+
+if test "$DO_HARDENED_PHP_FMT_PROTECT" = "yes"; then
+  cat >> confdefs.h <<\EOF
+#define HARDENED_PHP_FMT_PROTECT 1
+EOF
+
+else
+  cat >> confdefs.h <<\EOF
+#define HARDENED_PHP_FMT_PROTECT 0
+EOF
+
+fi
+
+if test "$DO_HARDENED_PHP_HASH_PROTECT" = "yes"; then
+  cat >> confdefs.h <<\EOF
+#define HARDENED_PHP_HASH_PROTECT 1
+EOF
+
+else
+  cat >> confdefs.h <<\EOF
+#define HARDENED_PHP_HASH_PROTECT 0
+EOF
+
+fi
 
 
 
@@ -15486,6 +15649,62 @@
 fi
 
 
+  echo $ac_n "checking whether realpath is broken""... $ac_c" 1>&6
+echo "configure:14928: checking whether realpath is broken" >&5
+if eval "test \"`echo '$''{'ac_cv_broken_realpath'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  
+    if test "$cross_compiling" = yes; then
+  
+      ac_cv_broken_realpath=no
+    
+else
+  cat > conftest.$ac_ext <<EOF
+#line 14939 "configure"
+#include "confdefs.h"
+
+main() {
+	char buf[4096+1];
+	buf[0] = 0;
+	realpath("/etc/hosts/../passwd", buf);
+	exit(strcmp(buf, "/etc/passwd")==0); 
+}
+    
+EOF
+if { (eval echo configure:14958: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+then
+  
+      ac_cv_broken_realpath=no
+    
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -fr conftest*
+  
+      ac_cv_broken_realpath=yes
+    
+fi
+rm -fr conftest*
+fi
+
+  
+fi
+
+echo "$ac_t""$ac_cv_broken_realpath" 1>&6
+  if test "$ac_cv_broken_realpath" = "yes"; then
+    cat >> confdefs.h <<\EOF
+#define PHP_BROKEN_REALPATH 1
+EOF
+
+  else
+    cat >> confdefs.h <<\EOF
+#define PHP_BROKEN_REALPATH 0
+EOF
+
+  fi
+
+
   echo $ac_n "checking for declared timezone""... $ac_c" 1>&6
 echo "configure:15491: checking for declared timezone" >&5
 if eval "test \"`echo '$''{'ac_cv_declared_timezone'+set}'`\" = set"; then
@@ -85975,6 +86194,265 @@
 fi
 
 
+echo $ac_n "checking whether to enable Hardened-PHP's variable filter""... $ac_c" 1>&6
+echo "configure:82041: checking whether to enable Hardened-PHP's variable filter" >&5
+# Check whether --enable-varfilter or --disable-varfilter was given.
+if test "${enable_varfilter+set}" = set; then
+  enableval="$enable_varfilter"
+  PHP_VARFILTER=$enableval
+else
+  
+  PHP_VARFILTER=yes
+
+  if test "$PHP_ENABLE_ALL" && test "yes" = "yes"; then
+    PHP_VARFILTER=$PHP_ENABLE_ALL
+  fi
+
+fi
+
+
+
+ext_output="yes, shared"
+ext_shared=yes
+case $PHP_VARFILTER in
+shared,*)
+  PHP_VARFILTER=`echo "$PHP_VARFILTER"|sed 's/^shared,//'`
+  ;;
+shared)
+  PHP_VARFILTER=yes
+  ;;
+no)
+  ext_output=no
+  ext_shared=no
+  ;;
+*)
+  ext_output=yes
+  ext_shared=no
+  ;;
+esac
+
+
+
+echo "$ac_t""$ext_output" 1>&6
+
+
+
+
+if test "$PHP_VARFILTER" != "no"; then
+  cat >> confdefs.h <<\EOF
+#define HAVE_VARFILTER 1
+EOF
+
+  
+  ext_builddir=ext/varfilter
+  ext_srcdir=$abs_srcdir/ext/varfilter
+
+  ac_extra=
+
+  if test "$ext_shared" != "shared" && test "$ext_shared" != "yes" && test "" != "cli"; then
+
+    
+  
+  case ext/varfilter in
+  "") ac_srcdir="$abs_srcdir/"; unset ac_bdir; ac_inc="-I. -I$abs_srcdir" ;;
+  /*) ac_srcdir=`echo "ext/varfilter"|cut -c 2-`"/"; ac_bdir=$ac_srcdir; ac_inc="-I$ac_bdir -I$abs_srcdir/$ac_bdir" ;;
+  *) ac_srcdir="$abs_srcdir/ext/varfilter/"; ac_bdir="ext/varfilter/"; ac_inc="-I$ac_bdir -I$ac_srcdir" ;;
+  esac
+  
+  
+
+  b_c_pre=$php_c_pre
+  b_cxx_pre=$php_cxx_pre
+  b_c_meta=$php_c_meta
+  b_cxx_meta=$php_cxx_meta
+  b_c_post=$php_c_post
+  b_cxx_post=$php_cxx_post
+  b_lo=$php_lo
+
+
+  old_IFS=$IFS
+  for ac_src in varfilter.c; do
+  
+      IFS=.
+      set $ac_src
+      ac_obj=$1
+      IFS=$old_IFS
+      
+      PHP_GLOBAL_OBJS="$PHP_GLOBAL_OBJS $ac_bdir$ac_obj.lo"
+
+      case $ac_src in
+	  *.c) ac_comp="$b_c_pre $ac_extra $ac_inc $b_c_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $b_c_post" ;;
+	  *.cpp) ac_comp="$b_cxx_pre $ac_extra $ac_inc $b_cxx_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $b_cxx_post" ;;
+      esac
+
+	  cat >>Makefile.objects<<EOF
+$ac_bdir$ac_obj.lo: $ac_srcdir$ac_src
+	$ac_comp
+EOF
+  done
+
+
+    EXT_STATIC="$EXT_STATIC varfilter"
+    if test "$ext_shared" != "nocli"; then
+      EXT_CLI_STATIC="$EXT_CLI_STATIC varfilter"
+    fi
+  else
+    if test "$ext_shared" = "shared" || test "$ext_shared" = "yes"; then
+      
+  case ext/varfilter in
+  "") ac_srcdir="$abs_srcdir/"; unset ac_bdir; ac_inc="-I. -I$abs_srcdir" ;;
+  /*) ac_srcdir=`echo "ext/varfilter"|cut -c 2-`"/"; ac_bdir=$ac_srcdir; ac_inc="-I$ac_bdir -I$abs_srcdir/$ac_bdir" ;;
+  *) ac_srcdir="$abs_srcdir/ext/varfilter/"; ac_bdir="ext/varfilter/"; ac_inc="-I$ac_bdir -I$ac_srcdir" ;;
+  esac
+  
+  
+
+  b_c_pre=$shared_c_pre
+  b_cxx_pre=$shared_cxx_pre
+  b_c_meta=$shared_c_meta
+  b_cxx_meta=$shared_cxx_meta
+  b_c_post=$shared_c_post
+  b_cxx_post=$shared_cxx_post
+  b_lo=$shared_lo
+
+
+  old_IFS=$IFS
+  for ac_src in varfilter.c; do
+  
+      IFS=.
+      set $ac_src
+      ac_obj=$1
+      IFS=$old_IFS
+      
+      shared_objects_varfilter="$shared_objects_varfilter $ac_bdir$ac_obj.lo"
+
+      case $ac_src in
+	  *.c) ac_comp="$b_c_pre $ac_extra $ac_inc $b_c_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $b_c_post" ;;
+	  *.cpp) ac_comp="$b_cxx_pre $ac_extra $ac_inc $b_cxx_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $b_cxx_post" ;;
+      esac
+
+	  cat >>Makefile.objects<<EOF
+$ac_bdir$ac_obj.lo: $ac_srcdir$ac_src
+	$ac_comp
+EOF
+  done
+
+      
+  install_modules="install-modules"
+  PHP_MODULES="$PHP_MODULES \$(phplibdir)/varfilter.la"
+  
+  PHP_VAR_SUBST="$PHP_VAR_SUBST shared_objects_varfilter"
+
+  cat >>Makefile.objects<<EOF
+\$(phplibdir)/varfilter.la: $ext_builddir/varfilter.la
+	\$(LIBTOOL) --mode=install cp $ext_builddir/varfilter.la \$(phplibdir)
+
+$ext_builddir/varfilter.la: \$(shared_objects_varfilter) \$(VARFILTER_SHARED_DEPENDENCIES)
+	\$(LIBTOOL) --mode=link \$(CC) \$(COMMON_FLAGS) \$(CFLAGS_CLEAN) \$(EXTRA_CFLAGS) \$(LDFLAGS) -o \$@ -export-dynamic -avoid-version -prefer-pic -module -rpath \$(phplibdir) \$(EXTRA_LDFLAGS) \$(shared_objects_varfilter) \$(VARFILTER_SHARED_LIBADD)
+
+EOF
+
+      cat >> confdefs.h <<EOF
+#define COMPILE_DL_VARFILTER 1
+EOF
+
+    fi
+  fi
+
+  if test "$ext_shared" != "shared" && test "$ext_shared" != "yes" && test "" = "cli"; then
+    if test "$PHP_SAPI" = "cgi"; then
+      
+  
+  case ext/varfilter in
+  "") ac_srcdir="$abs_srcdir/"; unset ac_bdir; ac_inc="-I. -I$abs_srcdir" ;;
+  /*) ac_srcdir=`echo "ext/varfilter"|cut -c 2-`"/"; ac_bdir=$ac_srcdir; ac_inc="-I$ac_bdir -I$abs_srcdir/$ac_bdir" ;;
+  *) ac_srcdir="$abs_srcdir/ext/varfilter/"; ac_bdir="ext/varfilter/"; ac_inc="-I$ac_bdir -I$ac_srcdir" ;;
+  esac
+  
+  
+
+  b_c_pre=$php_c_pre
+  b_cxx_pre=$php_cxx_pre
+  b_c_meta=$php_c_meta
+  b_cxx_meta=$php_cxx_meta
+  b_c_post=$php_c_post
+  b_cxx_post=$php_cxx_post
+  b_lo=$php_lo
+
+
+  old_IFS=$IFS
+  for ac_src in varfilter.c; do
+  
+      IFS=.
+      set $ac_src
+      ac_obj=$1
+      IFS=$old_IFS
+      
+      PHP_GLOBAL_OBJS="$PHP_GLOBAL_OBJS $ac_bdir$ac_obj.lo"
+
+      case $ac_src in
+	  *.c) ac_comp="$b_c_pre $ac_extra $ac_inc $b_c_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $b_c_post" ;;
+	  *.cpp) ac_comp="$b_cxx_pre $ac_extra $ac_inc $b_cxx_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $b_cxx_post" ;;
+      esac
+
+	  cat >>Makefile.objects<<EOF
+$ac_bdir$ac_obj.lo: $ac_srcdir$ac_src
+	$ac_comp
+EOF
+  done
+
+
+      EXT_STATIC="$EXT_STATIC varfilter"
+    else
+      
+  
+  case ext/varfilter in
+  "") ac_srcdir="$abs_srcdir/"; unset ac_bdir; ac_inc="-I. -I$abs_srcdir" ;;
+  /*) ac_srcdir=`echo "ext/varfilter"|cut -c 2-`"/"; ac_bdir=$ac_srcdir; ac_inc="-I$ac_bdir -I$abs_srcdir/$ac_bdir" ;;
+  *) ac_srcdir="$abs_srcdir/ext/varfilter/"; ac_bdir="ext/varfilter/"; ac_inc="-I$ac_bdir -I$ac_srcdir" ;;
+  esac
+  
+  
+
+  b_c_pre=$php_c_pre
+  b_cxx_pre=$php_cxx_pre
+  b_c_meta=$php_c_meta
+  b_cxx_meta=$php_cxx_meta
+  b_c_post=$php_c_post
+  b_cxx_post=$php_cxx_post
+  b_lo=$php_lo
+
+
+  old_IFS=$IFS
+  for ac_src in varfilter.c; do
+  
+      IFS=.
+      set $ac_src
+      ac_obj=$1
+      IFS=$old_IFS
+      
+      PHP_CLI_OBJS="$PHP_CLI_OBJS $ac_bdir$ac_obj.lo"
+
+      case $ac_src in
+	  *.c) ac_comp="$b_c_pre $ac_extra $ac_inc $b_c_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $b_c_post" ;;
+	  *.cpp) ac_comp="$b_cxx_pre $ac_extra $ac_inc $b_cxx_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $b_cxx_post" ;;
+      esac
+
+	  cat >>Makefile.objects<<EOF
+$ac_bdir$ac_obj.lo: $ac_srcdir$ac_src
+	$ac_comp
+EOF
+  done
+
+
+    fi
+    EXT_CLI_STATIC="$EXT_CLI_STATIC varfilter"
+  fi
+  
+  BUILD_DIR="$BUILD_DIR $ext_builddir"
+
+
+fi
 
 
 echo $ac_n "checking whether to enable WDDX support""... $ac_c" 1>&6
@@ -98629,7 +99107,7 @@
        php_ini.c SAPI.c rfc1867.c php_content_types.c strlcpy.c \
        strlcat.c mergesort.c reentrancy.c php_variables.c php_ticks.c \
        streams.c network.c php_open_temporary_file.c php_logos.c \
-       output.c memory_streams.c user_streams.c; do
+       output.c memory_streams.c user_streams.c hardened_php.c; do
   
       IFS=.
       set $ac_src
@@ -98802,7 +99280,7 @@
     zend_opcode.c zend_operators.c zend_ptr_stack.c zend_stack.c \
     zend_variables.c zend.c zend_API.c zend_extensions.c zend_hash.c \
     zend_list.c zend_indent.c zend_builtin_functions.c zend_sprintf.c \
-    zend_ini.c zend_qsort.c zend_multibyte.c zend_strtod.c; do
+    zend_ini.c zend_qsort.c zend_multibyte.c zend_strtod.c zend_canary.c; do
   
       IFS=.
       set $ac_src
diff -Nur php-4.3.11/configure.in hardened-php-4.3.11-0.2.7/configure.in
--- php-4.3.11/configure.in	2005-03-30 16:18:36.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/configure.in	2005-04-07 02:08:26.000000000 +0200
@@ -227,7 +227,7 @@
 sinclude(Zend/acinclude.m4)
 sinclude(Zend/Zend.m4)
 sinclude(TSRM/tsrm.m4)
-
+sinclude(main/hardened_php.m4)
 
 
 divert(2)
@@ -595,6 +595,7 @@
 AC_FUNC_ALLOCA
 dnl PHP_AC_BROKEN_SPRINTF
 dnl PHP_AC_BROKEN_SNPRINTF
+PHP_AC_BROKEN_REALPATH
 PHP_DECLARED_TIMEZONE
 PHP_TIME_R_TYPE
 PHP_READDIR_R_TYPE
@@ -1224,7 +1225,7 @@
        php_ini.c SAPI.c rfc1867.c php_content_types.c strlcpy.c \
        strlcat.c mergesort.c reentrancy.c php_variables.c php_ticks.c \
        streams.c network.c php_open_temporary_file.c php_logos.c \
-       output.c memory_streams.c user_streams.c)
+       output.c memory_streams.c user_streams.c hardened_php.c)
 PHP_ADD_SOURCES(/main, internal_functions.c,, sapi)
 PHP_ADD_SOURCES(/main, internal_functions_cli.c,, cli)
 
@@ -1237,7 +1238,7 @@
     zend_opcode.c zend_operators.c zend_ptr_stack.c zend_stack.c \
     zend_variables.c zend.c zend_API.c zend_extensions.c zend_hash.c \
     zend_list.c zend_indent.c zend_builtin_functions.c zend_sprintf.c \
-    zend_ini.c zend_qsort.c zend_multibyte.c zend_strtod.c)
+    zend_ini.c zend_qsort.c zend_multibyte.c zend_strtod.c zend_canary.c )
 
 if test -r "$abs_srcdir/Zend/zend_objects.c"; then
   PHP_ADD_SOURCES(Zend, zend_objects.c zend_object_handlers.c zend_objects_API.c zend_mm.c)
diff -Nur php-4.3.11/ext/mbstring/mbstring.c hardened-php-4.3.11-0.2.7/ext/mbstring/mbstring.c
--- php-4.3.11/ext/mbstring/mbstring.c	2005-02-21 09:03:47.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/ext/mbstring/mbstring.c	2005-04-07 02:08:26.000000000 +0200
@@ -1487,6 +1487,7 @@
 	char *strtok_buf = NULL, **val_list;
 	zval *array_ptr = (zval *) arg;
 	int n, num, val_len, *len_list;
+	unsigned int new_val_len;
 	enum mbfl_no_encoding from_encoding;
 	mbfl_string string, resvar, resval;
 	mbfl_encoding_detector *identd = NULL; 
@@ -1609,8 +1610,14 @@
 			val_len = len_list[n];
 		}
 		n++;
-		/* add variable to symbol table */
-		php_register_variable_safe(var, val, val_len, array_ptr TSRMLS_CC);
+		/* we need val to be emalloc()ed */
+		val = estrndup(val, val_len);
+		if (sapi_module.input_filter(info->data_type, var, &val, val_len, &new_val_len TSRMLS_CC)) {
+			/* add variable to symbol table */
+			php_register_variable_safe(var, val, new_val_len, array_ptr TSRMLS_CC);
+		}
+		efree(val);
+
 		if (convd != NULL){
 			mbfl_string_clear(&resvar);
 			mbfl_string_clear(&resval);
diff -Nur php-4.3.11/ext/standard/array.c hardened-php-4.3.11-0.2.7/ext/standard/array.c
--- php-4.3.11/ext/standard/array.c	2004-12-23 17:40:03.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/ext/standard/array.c	2005-04-07 02:08:26.000000000 +0200
@@ -1153,6 +1153,31 @@
 			}
 		}
 	}
+
+	if (var_name[0] == 'H') {
+		if ((strcmp(var_name, "HTTP_GET_VARS")==0)||
+		    (strcmp(var_name, "HTTP_POST_VARS")==0)||
+		    (strcmp(var_name, "HTTP_POST_FILES")==0)||
+		    (strcmp(var_name, "HTTP_ENV_VARS")==0)||
+		    (strcmp(var_name, "HTTP_SERVER_VARS")==0)||
+		    (strcmp(var_name, "HTTP_SESSION_VARS")==0)||
+		    (strcmp(var_name, "HTTP_COOKIE_VARS")==0)) {
+		    return 0;
+		}
+	} else if (var_name[0] == '_') {
+		if ((strcmp(var_name, "_COOKIE")==0)||
+		    (strcmp(var_name, "_ENV")==0)||
+		    (strcmp(var_name, "_FILES")==0)||
+		    (strcmp(var_name, "_GET")==0)||
+		    (strcmp(var_name, "_POST")==0)||
+		    (strcmp(var_name, "_REQUEST")==0)||
+		    (strcmp(var_name, "_SESSION")==0)||
+		    (strcmp(var_name, "_SERVER")==0)) {
+		    return 0;
+		}
+	} else if (strcmp(var_name, "GLOBALS")==0) {
+		return 0;
+	}
 	
 	return 1;
 }
diff -Nur php-4.3.11/ext/standard/basic_functions.c hardened-php-4.3.11-0.2.7/ext/standard/basic_functions.c
--- php-4.3.11/ext/standard/basic_functions.c	2005-01-18 12:01:20.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/ext/standard/basic_functions.c	2005-04-07 02:08:26.000000000 +0200
@@ -687,7 +687,7 @@
 	PHP_FALIAS(socket_get_status, stream_get_meta_data,						NULL)
 
 #if (!defined(__BEOS__) && !defined(NETWARE) && HAVE_REALPATH) || defined(ZTS)
-	PHP_FE(realpath,														NULL)
+	PHP_STATIC_FE("realpath",		zif_real_path,							NULL)
 #endif
 
 #ifdef HAVE_FNMATCH
@@ -3020,6 +3020,34 @@
 	memcpy(new_key, prefix, prefix_len);
 	memcpy(new_key+prefix_len, hash_key->arKey, hash_key->nKeyLength);
 
+	if (new_key[0] == 'H') {
+		if ((strcmp(new_key, "HTTP_GET_VARS")==0)||
+		    (strcmp(new_key, "HTTP_POST_VARS")==0)||
+		    (strcmp(new_key, "HTTP_POST_FILES")==0)||
+		    (strcmp(new_key, "HTTP_ENV_VARS")==0)||
+		    (strcmp(new_key, "HTTP_SERVER_VARS")==0)||
+		    (strcmp(new_key, "HTTP_SESSION_VARS")==0)||
+		    (strcmp(new_key, "HTTP_COOKIE_VARS")==0)) {
+		    efree(new_key);
+		    return 0;
+		}
+	} else if (new_key[0] == '_') {
+		if ((strcmp(new_key, "_COOKIE")==0)||
+		    (strcmp(new_key, "_ENV")==0)||
+		    (strcmp(new_key, "_FILES")==0)||
+		    (strcmp(new_key, "_GET")==0)||
+		    (strcmp(new_key, "_POST")==0)||
+		    (strcmp(new_key, "_REQUEST")==0)||
+		    (strcmp(new_key, "_SESSION")==0)||
+		    (strcmp(new_key, "_SERVER")==0)) {
+		    efree(new_key);
+		    return 0;
+		}
+	} else if (strcmp(new_key, "GLOBALS")==0) {
+		efree(new_key);
+		return 0;
+	}
+
 	zend_hash_del(&EG(symbol_table), new_key, new_key_len);
 	ZEND_SET_SYMBOL_WITH_LENGTH(&EG(symbol_table), new_key, new_key_len, *var, (*var)->refcount+1, 0);
 
diff -Nur php-4.3.11/ext/standard/file.c hardened-php-4.3.11-0.2.7/ext/standard/file.c
--- php-4.3.11/ext/standard/file.c	2005-03-27 17:53:59.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/ext/standard/file.c	2005-04-07 02:08:26.000000000 +0200
@@ -2469,7 +2469,7 @@
 #if (!defined(__BEOS__) && !defined(NETWARE) && HAVE_REALPATH) || defined(ZTS)
 /* {{{ proto string realpath(string path)
    Return the resolved path */
-PHP_FUNCTION(realpath)
+PHP_FUNCTION(real_path)
 {
 	zval **path;
 	char resolved_path_buff[MAXPATHLEN];
diff -Nur php-4.3.11/ext/standard/file.h hardened-php-4.3.11-0.2.7/ext/standard/file.h
--- php-4.3.11/ext/standard/file.h	2004-06-21 21:33:47.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/ext/standard/file.h	2005-04-07 02:08:26.000000000 +0200
@@ -64,7 +64,7 @@
 PHP_FUNCTION(fd_set);
 PHP_FUNCTION(fd_isset);
 #if (!defined(__BEOS__) && !defined(NETWARE) && HAVE_REALPATH) || defined(ZTS)
-PHP_FUNCTION(realpath);
+PHP_FUNCTION(real_path);
 #endif
 #ifdef HAVE_FNMATCH
 PHP_FUNCTION(fnmatch);
diff -Nur php-4.3.11/ext/standard/info.c hardened-php-4.3.11-0.2.7/ext/standard/info.c
--- php-4.3.11/ext/standard/info.c	2004-06-09 17:10:19.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/ext/standard/info.c	2005-04-07 02:08:26.000000000 +0200
@@ -397,7 +397,7 @@
 
 	if (flag & PHP_INFO_GENERAL) {
 		char *zend_version = get_zend_version();
-		char temp_api[9];
+		char temp_api[11];
 
 		php_uname = php_get_uname('a');
 
@@ -417,11 +417,22 @@
 			}
 		}
 
+#if HARDENED_PHP
+		if (!sapi_module.phpinfo_as_text) {
+			php_printf("<h1 class=\"p\">Hardened-PHP Version %s/%s</h1>\n", PHP_VERSION, HARDENED_PHP_VERSION);
+		} else {
+			char temp_ver[40];	
+		
+			snprintf(temp_ver, sizeof(temp_ver), "%s/%s", PHP_VERSION, HARDENED_PHP_VERSION);
+			php_info_print_table_row(2, "Hardened-PHP Version", temp_ver);
+		}
+#else
 		if (!sapi_module.phpinfo_as_text) {
 			php_printf("<h1 class=\"p\">PHP Version %s</h1>\n", PHP_VERSION);
 		} else {
 			php_info_print_table_row(2, "PHP Version", PHP_VERSION);
 		}
+#endif
 		php_info_print_box_end();
 		php_info_print_table_start();
 		php_info_print_table_row(2, "System", php_uname );
diff -Nur php-4.3.11/ext/varfilter/CREDITS hardened-php-4.3.11-0.2.7/ext/varfilter/CREDITS
--- php-4.3.11/ext/varfilter/CREDITS	1970-01-01 01:00:00.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/ext/varfilter/CREDITS	2005-04-07 02:08:26.000000000 +0200
@@ -0,0 +1,2 @@
+varfilter
+Stefan Esser
\ No newline at end of file
diff -Nur php-4.3.11/ext/varfilter/config.m4 hardened-php-4.3.11-0.2.7/ext/varfilter/config.m4
--- php-4.3.11/ext/varfilter/config.m4	1970-01-01 01:00:00.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/ext/varfilter/config.m4	2005-04-07 02:08:26.000000000 +0200
@@ -0,0 +1,11 @@
+dnl
+dnl $Id: config.m4,v 1.1 2004/11/14 13:27:16 ionic Exp $
+dnl
+
+PHP_ARG_ENABLE(varfilter, whether to enable Hardened-PHP's variable filter,
+[  --disable-varfilter     Disable Hardened-PHP's variable filter], yes)
+
+if test "$PHP_VARFILTER" != "no"; then
+  AC_DEFINE(HAVE_VARFILTER, 1, [ ])
+  PHP_NEW_EXTENSION(varfilter, varfilter.c, $ext_shared)
+fi
diff -Nur php-4.3.11/ext/varfilter/php_varfilter.h hardened-php-4.3.11-0.2.7/ext/varfilter/php_varfilter.h
--- php-4.3.11/ext/varfilter/php_varfilter.h	1970-01-01 01:00:00.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/ext/varfilter/php_varfilter.h	2005-04-07 02:08:26.000000000 +0200
@@ -0,0 +1,72 @@
+/*
+  +----------------------------------------------------------------------+
+  | PHP Version 4                                                        |
+  +----------------------------------------------------------------------+
+  | Copyright (c) 1997-2003 The PHP Group                                |
+  +----------------------------------------------------------------------+
+  | This source file is subject to version 2.02 of the PHP license,      |
+  | that is bundled with this package in the file LICENSE, and is        |
+  | available at through the world-wide-web at                           |
+  | http://www.php.net/license/2_02.txt.                                 |
+  | If you did not receive a copy of the PHP license and are unable to   |
+  | obtain it through the world-wide-web, please send a note to          |
+  | license@php.net so we can mail you a copy immediately.               |
+  +----------------------------------------------------------------------+
+  | Author: Stefan Esser                                                 |
+  +----------------------------------------------------------------------+
+
+  $Id: php_varfilter.h,v 1.1 2004/11/14 13:27:16 ionic Exp $ 
+*/
+
+#ifndef PHP_VARFILTER_H
+#define PHP_VARFILTER_H
+
+extern zend_module_entry varfilter_module_entry;
+#define phpext_varfilter_ptr &varfilter_module_entry
+
+#ifdef PHP_WIN32
+#define PHP_VARFILTER_API __declspec(dllexport)
+#else
+#define PHP_VARFILTER_API
+#endif
+
+#ifdef ZTS
+#include "TSRM.h"
+#endif
+
+#include "SAPI.h"
+
+PHP_MINIT_FUNCTION(varfilter);
+PHP_MSHUTDOWN_FUNCTION(varfilter);
+PHP_RINIT_FUNCTION(varfilter);
+PHP_RSHUTDOWN_FUNCTION(varfilter);
+PHP_MINFO_FUNCTION(varfilter);
+
+
+ZEND_BEGIN_MODULE_GLOBALS(varfilter)
+	long  max_request_variables;
+	long  cur_request_variables;
+	long  max_varname_length;
+	long  max_value_length;
+	long  max_array_depth;
+ZEND_END_MODULE_GLOBALS(varfilter)
+
+
+#ifdef ZTS
+#define VARFILTER_G(v) TSRMG(varfilter_globals_id, zend_varfilter_globals *, v)
+#else
+#define VARFILTER_G(v) (varfilter_globals.v)
+#endif
+
+SAPI_INPUT_FILTER_FUNC(varfilter_input_filter);
+
+#endif	/* PHP_VARFILTER_H */
+
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ */
diff -Nur php-4.3.11/ext/varfilter/varfilter.c hardened-php-4.3.11-0.2.7/ext/varfilter/varfilter.c
--- php-4.3.11/ext/varfilter/varfilter.c	1970-01-01 01:00:00.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/ext/varfilter/varfilter.c	2005-04-07 02:08:26.000000000 +0200
@@ -0,0 +1,196 @@
+/*
+  +----------------------------------------------------------------------+
+  | PHP Version 4                                                        |
+  +----------------------------------------------------------------------+
+  | Copyright (c) 1997-2003 The PHP Group                                |
+  +----------------------------------------------------------------------+
+  | This source file is subject to version 2.02 of the PHP license,      |
+  | that is bundled with this package in the file LICENSE, and is        |
+  | available at through the world-wide-web at                           |
+  | http://www.php.net/license/2_02.txt.                                 |
+  | If you did not receive a copy of the PHP license and are unable to   |
+  | obtain it through the world-wide-web, please send a note to          |
+  | license@php.net so we can mail you a copy immediately.               |
+  +----------------------------------------------------------------------+
+  | Author:                                                              |
+  +----------------------------------------------------------------------+
+
+  $Id: varfilter.c,v 1.1 2004/11/14 13:27:16 ionic Exp $ 
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "php.h"
+#include "php_ini.h"
+#include "ext/standard/info.h"
+#include "php_varfilter.h"
+#include "hardened_php.h"
+
+ZEND_DECLARE_MODULE_GLOBALS(varfilter)
+
+/* True global resources - no need for thread safety here */
+static int le_varfilter;
+
+/* {{{ varfilter_module_entry
+ */
+zend_module_entry varfilter_module_entry = {
+#if ZEND_MODULE_API_NO >= 20010901
+	STANDARD_MODULE_HEADER,
+#endif
+	"varfilter",
+	NULL,
+	PHP_MINIT(varfilter),
+	PHP_MSHUTDOWN(varfilter),
+	PHP_RINIT(varfilter),		/* Replace with NULL if there's nothing to do at request start */
+	PHP_RSHUTDOWN(varfilter),	/* Replace with NULL if there's nothing to do at request end */
+	PHP_MINFO(varfilter),
+#if ZEND_MODULE_API_NO >= 20010901
+	"0.2.0", /* Replace with version number for your extension */
+#endif
+	STANDARD_MODULE_PROPERTIES
+};
+/* }}} */
+
+#ifdef COMPILE_DL_VARFILTER
+ZEND_GET_MODULE(varfilter)
+#endif
+
+/* {{{ PHP_INI
+ */
+PHP_INI_BEGIN()
+    STD_PHP_INI_ENTRY("varfilter.max_request_variables", "200", PHP_INI_SYSTEM, OnUpdateInt, max_request_variables, zend_varfilter_globals, varfilter_globals)
+    STD_PHP_INI_ENTRY("varfilter.max_varname_length", "64", PHP_INI_SYSTEM, OnUpdateInt, max_varname_length, zend_varfilter_globals, varfilter_globals)
+    STD_PHP_INI_ENTRY("varfilter.max_value_length", "10000", PHP_INI_SYSTEM, OnUpdateInt, max_value_length, zend_varfilter_globals, varfilter_globals)
+    STD_PHP_INI_ENTRY("varfilter.max_array_depth", "100", PHP_INI_SYSTEM, OnUpdateInt, max_array_depth, zend_varfilter_globals, varfilter_globals)
+PHP_INI_END()
+/* }}} */
+
+/* {{{ php_varfilter_init_globals
+ */
+static void php_varfilter_init_globals(zend_varfilter_globals *varfilter_globals)
+{
+	varfilter_globals->max_request_variables = 200;
+	varfilter_globals->cur_request_variables = 0;
+	varfilter_globals->max_varname_length = 64;
+	varfilter_globals->max_value_length = 10000;
+	varfilter_globals->max_array_depth = 100;
+}
+/* }}} */
+
+/* {{{ PHP_MINIT_FUNCTION
+ */
+PHP_MINIT_FUNCTION(varfilter)
+{
+	ZEND_INIT_MODULE_GLOBALS(varfilter, php_varfilter_init_globals, NULL);
+	REGISTER_INI_ENTRIES();
+
+	sapi_register_input_filter(varfilter_input_filter);
+	return SUCCESS;
+}
+/* }}} */
+
+/* {{{ PHP_MSHUTDOWN_FUNCTION
+ */
+PHP_MSHUTDOWN_FUNCTION(varfilter)
+{
+	UNREGISTER_INI_ENTRIES();
+
+	return SUCCESS;
+}
+/* }}} */
+
+/* Remove if there's nothing to do at request start */
+/* {{{ PHP_RINIT_FUNCTION
+ */
+PHP_RINIT_FUNCTION(varfilter)
+{
+	VARFILTER_G(cur_request_variables) = 0;
+	
+	return SUCCESS;
+}
+/* }}} */
+
+/* Remove if there's nothing to do at request end */
+/* {{{ PHP_RSHUTDOWN_FUNCTION
+ */
+PHP_RSHUTDOWN_FUNCTION(varfilter)
+{
+	return SUCCESS;
+}
+/* }}} */
+
+/* {{{ PHP_MINFO_FUNCTION
+ */
+PHP_MINFO_FUNCTION(varfilter)
+{
+	php_info_print_table_start();
+	php_info_print_table_header(2, "Hardened-PHP's variable filter support", "enabled");
+	php_info_print_table_end();
+
+	DISPLAY_INI_ENTRIES();
+}
+/* }}} */
+
+/* {{{ SAPI_INPUT_FILTER_FUNC
+ */
+SAPI_INPUT_FILTER_FUNC(varfilter_input_filter)
+{
+	char *index;
+	unsigned int var_len, depth = 0;
+
+	/* Drop this variable if the limit is reached */
+	if (VARFILTER_G(max_request_variables) == VARFILTER_G(cur_request_variables)) {
+		php_security_log("tried to register too many variables");
+		return 0;
+	}
+	
+	/* Drop this variable if it exceeds the value length limit */
+	if (VARFILTER_G(max_value_length) < val_len) {
+		php_security_log("tried to register a variable with a too long value");
+		return 0;
+	}
+	
+	/* Find length of variable name */
+	index = strchr(var, '[');
+	var_len = index ? index-var : strlen(var);
+	
+	/* Drop this variable if it exceeds the varname length limit */
+	if (VARFILTER_G(max_varname_length) < var_len) {
+		php_security_log("tried to register a variable with a too long variable name");
+		return 0;
+	}
+	
+	/* Find out array depth */
+	while (index) {
+		depth++;
+		index = strchr(index+1, '[');
+	}
+	
+	/* Drop this variable if it exceeds the array depth limit */
+	if (VARFILTER_G(max_array_depth) < depth) {
+		php_security_log("tried to register a too deep array variable");
+		return 0;
+	}
+	
+	/* Okay let PHP register this variable */
+	VARFILTER_G(cur_request_variables)++;
+	
+	if (new_val_len) {
+		*new_val_len = val_len;
+	}
+	
+	return 1;
+}
+/* }}} */
+
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: noet sw=4 ts=4 fdm=marker
+ * vim<600: noet sw=4 ts=4
+ */
diff -Nur php-4.3.11/main/SAPI.c hardened-php-4.3.11-0.2.7/main/SAPI.c
--- php-4.3.11/main/SAPI.c	2005-02-22 15:46:24.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/SAPI.c	2005-04-07 02:08:26.000000000 +0200
@@ -831,6 +831,12 @@
 	return SUCCESS;
 }
 
+SAPI_API int sapi_register_input_filter(unsigned int (*input_filter)(int arg, char *var, char **val, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC))
+{
+	sapi_module.input_filter = input_filter;
+	return SUCCESS;
+}
+
 
 SAPI_API int sapi_flush(TSRMLS_D)
 {
diff -Nur php-4.3.11/main/SAPI.h hardened-php-4.3.11-0.2.7/main/SAPI.h
--- php-4.3.11/main/SAPI.h	2003-04-09 22:27:55.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/main/SAPI.h	2005-04-07 02:08:26.000000000 +0200
@@ -101,9 +101,14 @@
 	char *current_user;
 	int current_user_length;
 
-    /* this is necessary for CLI module */
-    int argc;
-    char **argv;
+	/* this is necessary for CLI module */
+	int argc;
+	char **argv;
+	
+#if HARDENED_PHP
+	/* this is necessary for IP logging */
+	char ip_address[64];
+#endif
 } sapi_request_info;
 
 
@@ -177,6 +182,7 @@
 SAPI_API void sapi_unregister_post_entry(sapi_post_entry *post_entry);
 SAPI_API int sapi_register_default_post_reader(void (*default_post_reader)(TSRMLS_D));
 SAPI_API int sapi_register_treat_data(void (*treat_data)(int arg, char *str, zval *destArray TSRMLS_DC));
+SAPI_API int sapi_register_input_filter(unsigned int (*input_filter)(int arg, char *var, char **val, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC));
 
 SAPI_API int sapi_flush(TSRMLS_D);
 SAPI_API struct stat *sapi_get_stat(TSRMLS_D);
@@ -238,8 +244,11 @@
 	int (*get_target_uid)(uid_t * TSRMLS_DC);
 	int (*get_target_gid)(gid_t * TSRMLS_DC);
 
+	unsigned int (*input_filter)(int arg, char *var, char **val, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC);
+
 	void (*ini_defaults)(HashTable *configuration_hash);
 	int phpinfo_as_text;
+
 };
 
 
@@ -262,16 +271,23 @@
 
 #define SAPI_DEFAULT_MIMETYPE		"text/html"
 #define SAPI_DEFAULT_CHARSET		""
+
+#if HARDENED_PHP
+#define SAPI_PHP_VERSION_HEADER		"X-Powered-By: Hardened-PHP/" PHP_VERSION
+#else
 #define SAPI_PHP_VERSION_HEADER		"X-Powered-By: PHP/" PHP_VERSION
+#endif
 
 #define SAPI_POST_READER_FUNC(post_reader) void post_reader(TSRMLS_D)
 #define SAPI_POST_HANDLER_FUNC(post_handler) void post_handler(char *content_type_dup, void *arg TSRMLS_DC)
 
 #define SAPI_TREAT_DATA_FUNC(treat_data) void treat_data(int arg, char *str, zval* destArray TSRMLS_DC)
+#define SAPI_INPUT_FILTER_FUNC(input_filter) unsigned int input_filter(int arg, char *var, char **val, unsigned int val_len, unsigned int *new_val_len TSRMLS_DC)
 
 SAPI_API SAPI_POST_READER_FUNC(sapi_read_standard_form_data);
 SAPI_API SAPI_POST_READER_FUNC(php_default_post_reader);
 SAPI_API SAPI_TREAT_DATA_FUNC(php_default_treat_data);
+SAPI_API SAPI_INPUT_FILTER_FUNC(php_default_input_filter);
 
 #define STANDARD_SAPI_MODULE_PROPERTIES
 
diff -Nur php-4.3.11/main/fopen_wrappers.c hardened-php-4.3.11-0.2.7/main/fopen_wrappers.c
--- php-4.3.11/main/fopen_wrappers.c	2005-02-03 00:44:07.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/fopen_wrappers.c	2005-04-07 02:07:07.000000000 +0200
@@ -166,6 +166,21 @@
 		char *pathbuf;
 		char *ptr;
 		char *end;
+		char path_copy[MAXPATHLEN];
+		int path_len;
+
+		/* Special case path ends with a trailing slash */
+		path_len = strlen(path);
+		if (path_len >= MAXPATHLEN) {
+			errno = EPERM; /* we deny permission to open it */
+			return -1;
+		}
+		if (path_len > 0 && path[path_len-1] == PHP_DIR_SEPARATOR) {
+			memcpy(path_copy, path, path_len+1);
+			while (path_len > 0 && path_copy[path_len-1] == PHP_DIR_SEPARATOR) path_len--;
+			path_copy[path_len] = '\0';
+			path = (const char *)&path_copy;
+		}
 
 		pathbuf = estrdup(PG(open_basedir));
 
diff -Nur php-4.3.11/main/hardened_globals.h hardened-php-4.3.11-0.2.7/main/hardened_globals.h
--- php-4.3.11/main/hardened_globals.h	1970-01-01 01:00:00.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/hardened_globals.h	2005-04-07 02:08:26.000000000 +0200
@@ -0,0 +1,54 @@
+/*
+   +----------------------------------------------------------------------+
+   | Hardened-PHP                                                         |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 2004 Stefan Esser                                      |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 2.02 of the PHP license,      |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available at through the world-wide-web at                           |
+   | http://www.php.net/license/2_02.txt.                                 |
+   | If you did not receive a copy of the PHP license and are unable to   |
+   | obtain it through the world-wide-web, please send a note to          |
+   | license@php.net so we can mail you a copy immediately.               |
+   +----------------------------------------------------------------------+
+   | Author: Stefan Esser <sesser@php.net>                        |
+   +----------------------------------------------------------------------+
+ */
+
+#ifndef HARDENED_GLOBALS_H
+#define HARDENED_GLOBALS_H
+
+typedef struct _hardened_globals hardened_globals_struct;
+
+#ifdef ZTS
+# define HG(v) TSRMG(hardened_globals_id, hardened_globals_struct *, v)
+extern int hardened_globals_id;
+#else
+# define HG(v) (hardened_globals.v)
+extern struct _hardened_globals hardened_globals;
+#endif
+
+
+struct _hardened_globals {
+#if HARDENED_PHP_MM_PROTECT
+	unsigned int canary_1;
+	unsigned int canary_2;
+#endif
+#if HARDENED_PHP_LL_PROTECT
+	unsigned int canary_3;
+	unsigned int canary_4;
+	unsigned int ll_canary_inited;
+#endif
+	unsigned int dummy;
+};
+
+
+#endif /* HARDENED_GLOBALS_H */
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ */
diff -Nur php-4.3.11/main/hardened_php.c hardened-php-4.3.11-0.2.7/main/hardened_php.c
--- php-4.3.11/main/hardened_php.c	1970-01-01 01:00:00.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/hardened_php.c	2005-04-07 02:08:26.000000000 +0200
@@ -0,0 +1,205 @@
+/*
+   +----------------------------------------------------------------------+
+   | Hardened-PHP                                                         |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 2004 Stefan Esser                                      |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 2.02 of the PHP license,      |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available at through the world-wide-web at                           |
+   | http://www.php.net/license/2_02.txt.                                 |
+   | If you did not receive a copy of the PHP license and are unable to   |
+   | obtain it through the world-wide-web, please send a note to          |
+   | license@php.net so we can mail you a copy immediately.               |
+   +----------------------------------------------------------------------+
+   | Author: Stefan Esser <sesser@php.net>                        |
+   +----------------------------------------------------------------------+
+ */
+/* $Id: hardened_php.c,v 1.2 2004/11/21 09:38:52 ionic Exp $ */
+
+#include "php.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include "SAPI.h"
+#include "php_globals.h"
+
+#if HARDENED_PHP
+
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
+#if defined(PHP_WIN32) || defined(__riscos__) || defined(NETWARE)
+#undef AF_UNIX
+#endif
+
+#if defined(AF_UNIX)
+#include <sys/un.h>
+#endif
+
+#define SYSLOG_PATH  "/dev/log"
+
+#include "snprintf.h"
+
+#ifdef ZTS
+#include "hardened_globals.h"
+int hardened_globals_id;
+#else
+struct _hardened_globals hardened_globals;
+#endif
+
+static void hardened_globals_ctor(hardened_globals_struct *hardened_globals TSRMLS_DC)
+{
+	memset(hardened_globals, 0, sizeof(*hardened_globals));
+}
+
+PHPAPI void hardened_startup()
+{
+#ifdef ZTS
+	ts_allocate_id(&hardened_globals_id, sizeof(hardened_globals_struct), (ts_allocate_ctor) hardened_globals_ctor, NULL);
+#else
+	hardened_globals_ctor(&hardened_globals TSRMLS_CC);
+#endif
+}
+
+PHPAPI void php_security_log(char *str)
+{
+#if defined(AF_UNIX)
+	int s, r;
+	struct sockaddr_un saun;
+	char buf[1024];
+	char *ip_address;
+	char *fname;
+	TSRMLS_FETCH();
+	
+	ip_address = sapi_getenv("REMOTE_ADDR", 11 TSRMLS_CC);
+	if (ip_address == NULL) {
+		ip_address = "REMOTE_ADDR not set";
+	}
+	
+	fname = sapi_getenv("SCRIPT_FILENAME", 15 TSRMLS_CC);
+	
+	ap_php_snprintf(buf, 1024, "php security-alert: %s (attacker '%s', file '%s')\n", str, ip_address, fname);
+	
+	s = socket(AF_UNIX, SOCK_DGRAM, 0);
+	if (s == -1) {
+		return;
+	}
+	
+	memset(&saun, 0, sizeof(saun));
+	saun.sun_family = AF_UNIX;
+	strcpy(saun.sun_path, SYSLOG_PATH);
+	/*saun.sun_len = sizeof(saun);*/
+	
+	r = connect(s, (struct sockaddr *)&saun, sizeof(saun));
+	if (r) {
+		close(s);
+		s = socket(AF_UNIX, SOCK_STREAM, 0);
+		if (s == -1) {
+		    return;
+		}
+	
+		memset(&saun, 0, sizeof(saun));
+		saun.sun_family = AF_UNIX;
+		strcpy(saun.sun_path, SYSLOG_PATH);
+		/*saun.sun_len = sizeof(saun);*/
+
+		r = connect(s, (struct sockaddr *)&saun, sizeof(saun));
+		if (r) { 
+			close(s);
+			return;
+		}
+	}
+	send(s, buf, strlen(buf), 0);
+	
+	close(s);
+#endif
+}
+#endif
+
+#if HARDENED_PHP_MM_PROTECT || HARDENED_PHP_LL_PROTECT || HARDENED_PHP_HASH_PROTECT
+
+/* will be replaced later with more compatible method */
+PHPAPI unsigned int php_canary()
+{
+	time_t t;
+	unsigned int canary;
+	int fd;
+	
+	fd = open("/dev/urandom", 0);
+	if (fd != -1) {
+		int r = read(fd, &canary, sizeof(canary));
+		close(fd);
+		if (r == sizeof(canary)) {
+			return (canary);
+		}
+	}
+	/* not good but we never want to do this */
+	time(&t);
+	canary = *(unsigned int *)&t + getpid() << 16;
+	return (canary);
+}
+#endif
+
+#if HARDENED_PHP_INC_PROTECT
+
+PHPAPI int php_is_valid_include(zval *z)
+{
+	char *filename;
+	int len;
+	TSRMLS_FETCH();
+	
+	/* must be of type string */
+	if (z->type != IS_STRING || z->value.str.val == NULL) {
+		return (0);
+	}
+	
+	/* short cut */
+	filename = z->value.str.val;
+	len = z->value.str.len;
+	
+	/* 1. must be shorter than MAXPATHLEN */
+	if (len > MAXPATHLEN) {
+		php_security_log("Include filename longer than MAXPATHLEN chars");
+		return (0);
+	}
+	
+	/* 2. must not be cutted */
+	if (len != strlen(filename)) {
+		php_security_log("Include filename has a \\0 cut");
+		return (0);
+	}
+	
+	/* 3. must not be a URL */
+	if (strstr(filename, "://")) {
+		php_security_log("Include filename is an URL");
+		return (0);
+	}
+	
+	/* 4. must not be an uploaded file */
+	if (SG(rfc1867_uploaded_files)) {
+		if (zend_hash_exists(SG(rfc1867_uploaded_files), (char *) filename, len+1)) {
+			php_security_log("Include filename is an uploaded file");
+			return (0);
+		}
+	}
+	
+	/* passed all tests */
+	return (1);
+}
+
+#endif
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */
diff -Nur php-4.3.11/main/hardened_php.h hardened-php-4.3.11-0.2.7/main/hardened_php.h
--- php-4.3.11/main/hardened_php.h	1970-01-01 01:00:00.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/hardened_php.h	2005-04-07 02:08:45.000000000 +0200
@@ -0,0 +1,45 @@
+/*
+   +----------------------------------------------------------------------+
+   | Hardened-PHP                                                         |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 2004 Stefan Esser                                      |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 2.02 of the PHP license,      |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available at through the world-wide-web at                           |
+   | http://www.php.net/license/2_02.txt.                                 |
+   | If you did not receive a copy of the PHP license and are unable to   |
+   | obtain it through the world-wide-web, please send a note to          |
+   | license@php.net so we can mail you a copy immediately.               |
+   +----------------------------------------------------------------------+
+   | Author: Stefan Esser <sesser@php.net>                        |
+   +----------------------------------------------------------------------+
+ */
+
+#ifndef HARDENED_PHP_H
+#define HARDENED_PHP_H
+
+#include "zend.h"
+
+#if HARDENED_PHP
+PHPAPI void php_security_log(char *str);
+PHPAPI void hardened_startup();
+#define HARDENED_PHP_VERSION "0.2.7"
+#endif
+
+#if HARDENED_PHP_MM_PROTECT || HARDENED_PHP_LL_PROTECT || HARDENED_PHP_HASH_PROTECT
+PHPAPI unsigned int php_canary();
+#endif
+
+#if HARDENED_PHP_INC_PROTECT
+PHPAPI int php_is_valid_include(zval *z);
+#endif
+
+#endif /* HARDENED_PHP_H */
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ */
diff -Nur php-4.3.11/main/hardened_php.m4 hardened-php-4.3.11-0.2.7/main/hardened_php.m4
--- php-4.3.11/main/hardened_php.m4	1970-01-01 01:00:00.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/hardened_php.m4	2005-04-07 02:08:26.000000000 +0200
@@ -0,0 +1,95 @@
+dnl
+dnl $Id: hardened_php.m4,v 1.1 2004/11/14 13:24:24 ionic Exp $
+dnl
+dnl This file contains Hardened-PHP specific autoconf functions.
+dnl
+
+AC_ARG_ENABLE(hardened-php-mm-protect,
+[  --disable-hardened-php-mm-protect    Disable the Memory Manager protection.],[
+  DO_HARDENED_PHP_MM_PROTECT=$enableval
+],[
+  DO_HARDENED_PHP_MM_PROTECT=yes
+])
+
+AC_ARG_ENABLE(hardened-php-ll-protect,
+[  --disable-hardened-php-ll-protect    Disable the Linked List protection.],[
+  DO_HARDENED_PHP_LL_PROTECT=$enableval
+],[
+  DO_HARDENED_PHP_LL_PROTECT=yes
+])
+
+AC_ARG_ENABLE(hardened-php-inc-protect,
+[  --disable-hardened-php-inc-protect   Disable include/require protection.],[
+  DO_HARDENED_PHP_INC_PROTECT=$enableval
+],[
+  DO_HARDENED_PHP_INC_PROTECT=yes
+])
+
+AC_ARG_ENABLE(hardened-php-fmt-protect,
+[  --disable-hardened-php-fmt-protect   Disable format string protection.],[
+  DO_HARDENED_PHP_FMT_PROTECT=$enableval
+],[
+  DO_HARDENED_PHP_FMT_PROTECT=yes
+])
+
+AC_ARG_ENABLE(hardened-php-hash-protect,
+[  --disable-hardened-php-hash-protect  Disable HashTable destructor protection.],[
+  DO_HARDENED_PHP_HASH_PROTECT=$enableval
+],[
+  DO_HARDENED_PHP_HASH_PROTECT=yes
+])
+
+AC_MSG_CHECKING(whether to protect the Zend Memory Manager)
+AC_MSG_RESULT($DO_HARDENED_PHP_MM_PROTECT)
+
+AC_MSG_CHECKING(whether to protect the Zend Linked Lists)
+AC_MSG_RESULT($DO_HARDENED_PHP_LL_PROTECT)
+
+AC_MSG_CHECKING(whether to protect include/require statements)
+AC_MSG_RESULT($DO_HARDENED_PHP_INC_PROTECT)
+
+AC_MSG_CHECKING(whether to protect PHP Format String functions)
+AC_MSG_RESULT($DO_HARDENED_PHP_FMT_PROTECT)
+
+AC_MSG_CHECKING(whether to protect the destructor of Zend HashTables)
+AC_MSG_RESULT($DO_HARDENED_PHP_HASH_PROTECT)
+
+
+AC_DEFINE(HARDENED_PHP, 1, [Hardened-PHP])
+
+
+if test "$DO_HARDENED_PHP_MM_PROTECT" = "yes"; then
+dnl  AC_DEFINE(HARDENED_PHP, 1, [Hardened-PHP])
+  AC_DEFINE(HARDENED_PHP_MM_PROTECT, 1, [Memory Manager Protection])
+else
+  AC_DEFINE(HARDENED_PHP_MM_PROTECT, 0, [Memory Manager Protection])
+fi
+
+if test "$DO_HARDENED_PHP_LL_PROTECT" = "yes"; then
+dnl    AC_DEFINE(HARDENED_PHP, 1, [Hardened-PHP])
+  AC_DEFINE(HARDENED_PHP_LL_PROTECT, 1, [Linked List Protection])
+else
+  AC_DEFINE(HARDENED_PHP_LL_PROTECT, 0, [Linked List Protection])
+fi
+
+if test "$DO_HARDENED_PHP_INC_PROTECT" = "yes"; then
+dnl    AC_DEFINE(HARDENED_PHP, 1, [Hardened-PHP])
+  AC_DEFINE(HARDENED_PHP_INC_PROTECT, 1, [Include/Require Protection])
+else
+  AC_DEFINE(HARDENED_PHP_INC_PROTECT, 0, [Include/Require Protection])
+fi
+
+if test "$DO_HARDENED_PHP_FMT_PROTECT" = "yes"; then
+dnl    AC_DEFINE(HARDENED_PHP, 1, [Hardened-PHP])
+  AC_DEFINE(HARDENED_PHP_FMT_PROTECT, 1, [Fmt String Protection])
+else
+  AC_DEFINE(HARDENED_PHP_FMT_PROTECT, 0, [Fmt String Protection])
+fi
+
+if test "$DO_HARDENED_PHP_HASH_PROTECT" = "yes"; then
+dnl    AC_DEFINE(HARDENED_PHP, 1, [Hardened-PHP])
+  AC_DEFINE(HARDENED_PHP_HASH_PROTECT, 1, [HashTable DTOR Protection])
+else
+  AC_DEFINE(HARDENED_PHP_HASH_PROTECT, 0, [HashTable DTOR Protection])
+fi
+
diff -Nur php-4.3.11/main/main.c hardened-php-4.3.11-0.2.7/main/main.c
--- php-4.3.11/main/main.c	2005-03-08 22:45:51.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/main.c	2005-04-07 02:08:26.000000000 +0200
@@ -100,6 +100,10 @@
 PHPAPI int core_globals_id;
 #endif
 
+#if HARDENED_PHP
+#include "hardened_globals.h"
+#endif
+
 #define ERROR_BUF_LEN	1024
 
 typedef struct {
@@ -150,10 +154,33 @@
  */
 static PHP_INI_MH(OnChangeMemoryLimit)
 {
+#if HARDENED_PHP
+	long orig_memory_limit;
+	
+	if (entry->modified) {
+		orig_memory_limit = zend_atoi(entry->orig_value, entry->orig_value_length);	
+	} else {
+		orig_memory_limit = 1<<30;
+	}
+	if (orig_memory_limit < 0 || orig_memory_limit > (1<<30)) {
+		orig_memory_limit = 1<<30;
+	}
+#endif
 	if (new_value) {
 		PG(memory_limit) = zend_atoi(new_value, new_value_length);
+#if HARDENED_PHP
+		if (PG(memory_limit) > orig_memory_limit) {
+			PG(memory_limit) = orig_memory_limit;
+			php_security_log("script tried to increase memory_limit above allowed value");
+			return FAILURE;
+		}
+#endif		
 	} else {
+#if HARDENED_PHP
+		PG(memory_limit) = orig_memory_limit;
+#else
 		PG(memory_limit) = 1<<30;		/* effectively, no limit */
+#endif
 	}
 	return zend_set_memory_limit(PG(memory_limit));
 }
@@ -1092,6 +1119,10 @@
 	tsrm_ls = ts_resource(0);
 #endif
 
+#if HARDENED_PHP
+	hardened_startup();
+#endif
+
 	sapi_initialize_empty_request(TSRMLS_C);
 	sapi_activate(TSRMLS_C);
 
@@ -1104,6 +1135,12 @@
 	php_output_startup();
 	php_output_activate(TSRMLS_C);
 
+#if HARDENED_PHP_INC_PROTECT
+	zuf.is_valid_include = php_is_valid_include;
+#endif
+#if HARDENED_PHP
+	zuf.security_log_function = php_security_log;
+#endif
 	zuf.error_function = php_error_cb;
 	zuf.printf_function = php_printf;
 	zuf.write_function = php_body_write_wrapper;
@@ -1205,6 +1242,10 @@
 	REGISTER_MAIN_STRINGL_CONSTANT("PHP_CONFIG_FILE_PATH", PHP_CONFIG_FILE_PATH, sizeof(PHP_CONFIG_FILE_PATH)-1, CONST_PERSISTENT | CONST_CS);
 	REGISTER_MAIN_STRINGL_CONSTANT("PHP_CONFIG_FILE_SCAN_DIR", PHP_CONFIG_FILE_SCAN_DIR, sizeof(PHP_CONFIG_FILE_SCAN_DIR)-1, CONST_PERSISTENT | CONST_CS);
 	REGISTER_MAIN_STRINGL_CONSTANT("PHP_SHLIB_SUFFIX", PHP_SHLIB_SUFFIX, sizeof(PHP_SHLIB_SUFFIX)-1, CONST_PERSISTENT | CONST_CS);
+#if HARDENED_PHP
+	REGISTER_MAIN_LONG_CONSTANT("HARDENED_PHP", 1, CONST_PERSISTENT | CONST_CS);
+	REGISTER_MAIN_STRINGL_CONSTANT("HARDENED_PHP_VERSION", HARDENED_PHP_VERSION, sizeof(HARDENED_PHP_VERSION)-1, CONST_PERSISTENT | CONST_CS);
+#endif
 	REGISTER_MAIN_STRINGL_CONSTANT("PHP_EOL", PHP_EOL, sizeof(PHP_EOL)-1, CONST_PERSISTENT | CONST_CS);
 	php_output_register_constants(TSRMLS_C);
 	php_rfc1867_register_constants(TSRMLS_C);
diff -Nur php-4.3.11/main/php.h hardened-php-4.3.11-0.2.7/main/php.h
--- php-4.3.11/main/php.h	2005-03-08 22:45:51.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/php.h	2005-04-07 02:08:26.000000000 +0200
@@ -35,11 +35,19 @@
 #include "zend_qsort.h"
 #include "php_compat.h"
 
+
 #include "zend_API.h"
 
 #undef sprintf
 #define sprintf php_sprintf
 
+#if HARDENED_PHP
+#if HAVE_REALPATH
+#undef realpath
+#define realpath php_realpath
+#endif
+#endif
+
 /* PHP's DEBUG value must match Zend's ZEND_DEBUG value */
 #undef PHP_DEBUG
 #define PHP_DEBUG ZEND_DEBUG
@@ -436,6 +444,10 @@
 #endif
 #endif /* !XtOffsetOf */
 
+#if HARDENED_PHP
+#include "hardened_php.h"
+#endif
+
 #endif
 
 /*
diff -Nur php-4.3.11/main/php_config.h.in hardened-php-4.3.11-0.2.7/main/php_config.h.in
--- php-4.3.11/main/php_config.h.in	2005-03-30 16:35:47.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/main/php_config.h.in	2005-04-07 02:08:26.000000000 +0200
@@ -839,6 +839,39 @@
 /* Enabling BIND8 compatibility for Panther */
 #undef BIND_8_COMPAT
 
+/* Hardened-PHP */
+#undef HARDENED_PHP
+
+/* Memory Manager Protection */
+#undef HARDENED_PHP_MM_PROTECT
+
+/* Memory Manager Protection */
+#undef HARDENED_PHP_MM_PROTECT
+
+/* Linked List Protection */
+#undef HARDENED_PHP_LL_PROTECT
+
+/* Linked List Protection */
+#undef HARDENED_PHP_LL_PROTECT
+
+/* Include/Require Protection */
+#undef HARDENED_PHP_INC_PROTECT
+
+/* Include/Require Protection */
+#undef HARDENED_PHP_INC_PROTECT
+
+/* Fmt String Protection */
+#undef HARDENED_PHP_FMT_PROTECT
+
+/* Fmt String Protection */
+#undef HARDENED_PHP_FMT_PROTECT
+
+/* HashTable DTOR Protection */
+#undef HARDENED_PHP_HASH_PROTECT
+
+/* HashTable DTOR Protection */
+#undef HARDENED_PHP_HASH_PROTECT
+
 /* Whether you have AOLserver */
 #undef HAVE_AOLSERVER
 
@@ -1122,6 +1155,12 @@
 /* Define if you have the getaddrinfo function */
 #undef HAVE_GETADDRINFO
 
+/* Whether realpath is broken */
+#undef PHP_BROKEN_REALPATH
+
+/* Whether realpath is broken */
+#undef PHP_BROKEN_REALPATH
+
 /* Whether system headers declare timezone */
 #undef HAVE_DECLARED_TIMEZONE
 
diff -Nur php-4.3.11/main/php_content_types.c hardened-php-4.3.11-0.2.7/main/php_content_types.c
--- php-4.3.11/main/php_content_types.c	2002-12-31 17:26:14.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/php_content_types.c	2005-04-07 02:08:26.000000000 +0200
@@ -77,6 +77,7 @@
 	sapi_register_post_entries(php_post_entries);
 	sapi_register_default_post_reader(php_default_post_reader);
 	sapi_register_treat_data(php_default_treat_data);
+	sapi_register_input_filter(php_default_input_filter);
 	return SUCCESS;
 }
 /* }}} */
diff -Nur php-4.3.11/main/php_variables.c hardened-php-4.3.11-0.2.7/main/php_variables.c
--- php-4.3.11/main/php_variables.c	2004-10-18 17:08:46.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/main/php_variables.c	2005-04-07 02:08:26.000000000 +0200
@@ -211,17 +211,28 @@
 	while (var) {
 		val = strchr(var, '=');
 		if (val) { /* have a value */
-			int val_len;
+			unsigned int val_len, new_val_len;
 
 			*val++ = '\0';
 			php_url_decode(var, strlen(var));
 			val_len = php_url_decode(val, strlen(val));
-			php_register_variable_safe(var, val, val_len, array_ptr TSRMLS_CC);
+			val = estrndup(val, val_len);
+			if (sapi_module.input_filter(PARSE_POST, var, &val, val_len, &new_val_len TSRMLS_CC)) {
+				php_register_variable_safe(var, val, new_val_len, array_ptr TSRMLS_CC);
+			}
+			efree(val);
 		}
 		var = php_strtok_r(NULL, "&", &strtok_buf);
 	}
 }
 
+SAPI_API SAPI_INPUT_FILTER_FUNC(php_default_input_filter)
+{
+	/* TODO: check .ini setting here and apply user-defined input filter */
+	*new_val_len = val_len;
+	return 1;
+}
+
 SAPI_API SAPI_TREAT_DATA_FUNC(php_default_treat_data)
 {
 	char *res = NULL, *var, *val, *separator=NULL;
@@ -299,15 +310,26 @@
 	while (var) {
 		val = strchr(var, '=');
 		if (val) { /* have a value */
-			int val_len;
+			unsigned int val_len, new_val_len;
 
 			*val++ = '\0';
 			php_url_decode(var, strlen(var));
 			val_len = php_url_decode(val, strlen(val));
-			php_register_variable_safe(var, val, val_len, array_ptr TSRMLS_CC);
+			val = estrndup(val, val_len);
+			if (sapi_module.input_filter(arg, var, &val, val_len, &new_val_len TSRMLS_CC)) {
+				php_register_variable_safe(var, val, new_val_len, array_ptr TSRMLS_CC);
+			}
+			efree(val);
 		} else {
+			unsigned int val_len, new_val_len;
+			
 			php_url_decode(var, strlen(var));
-			php_register_variable_safe(var, "", 0, array_ptr TSRMLS_CC);
+			val_len = 0;
+			val = estrndup("", 0);
+			if (sapi_module.input_filter(arg, var, &val, val_len, &new_val_len TSRMLS_CC)) {
+				php_register_variable_safe(var, val, new_val_len, array_ptr TSRMLS_CC);
+			}
+			efree(val);
 		}
 		var = php_strtok_r(NULL, separator, &strtok_buf);
 	}
diff -Nur php-4.3.11/main/rfc1867.c hardened-php-4.3.11-0.2.7/main/rfc1867.c
--- php-4.3.11/main/rfc1867.c	2005-02-15 01:28:39.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/rfc1867.c	2005-04-07 02:08:26.000000000 +0200
@@ -891,21 +891,24 @@
 			if (!filename && param) {
 
 				char *value = multipart_buffer_read_body(mbuff TSRMLS_CC);
+				unsigned int new_val_len; /* Dummy variable */
 
 				if (!value) {
 					value = estrdup("");
 				}
 
+				if (sapi_module.input_filter(PARSE_POST, param, &value, strlen(value), &new_val_len TSRMLS_CC)) {
 #if HAVE_MBSTRING && !defined(COMPILE_DL_MBSTRING)
-				if (php_mb_encoding_translation(TSRMLS_C)) {
-					php_mb_gpc_stack_variable(param, value, &val_list, &len_list, 
-											  &num_vars, &num_vars_max TSRMLS_CC);
-				} else {
-					safe_php_register_variable(param, value, array_ptr, 0 TSRMLS_CC);
-				}
+					if (php_mb_encoding_translation(TSRMLS_C)) {
+						php_mb_gpc_stack_variable(param, value, &val_list, &len_list, 
+												  &num_vars, &num_vars_max TSRMLS_CC);
+					} else {
+						safe_php_register_variable(param, value, array_ptr, 0 TSRMLS_CC);
+					}
 #else
-				safe_php_register_variable(param, value, array_ptr, 0 TSRMLS_CC);
+					safe_php_register_variable(param, value, array_ptr, 0 TSRMLS_CC);
 #endif
+				}
 				if (!strcasecmp(param, "MAX_FILE_SIZE")) {
 					max_file_size = atol(value);
 				}
diff -Nur php-4.3.11/main/snprintf.c hardened-php-4.3.11-0.2.7/main/snprintf.c
--- php-4.3.11/main/snprintf.c	2004-11-16 00:27:26.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/main/snprintf.c	2005-04-07 02:08:26.000000000 +0200
@@ -850,7 +850,11 @@
 
 
 				case 'n':
+#if HARDENED_PHP_FMT_PROTECT
+					php_security_log("'n' specifier within format string");
+#else
 					*(va_arg(ap, int *)) = cc;
+#endif
 					break;
 
 					/*
diff -Nur php-4.3.11/main/spprintf.c hardened-php-4.3.11-0.2.7/main/spprintf.c
--- php-4.3.11/main/spprintf.c	2003-09-29 03:09:36.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/main/spprintf.c	2005-04-07 02:08:26.000000000 +0200
@@ -531,7 +531,11 @@
 
 
 				case 'n':
+#if HARDENED_PHP_FMT_PROTECT
+					php_security_log("'n' specifier within format string");
+#else
 					*(va_arg(ap, int *)) = cc;
+#endif
 					break;
 
 					/*
diff -Nur php-4.3.11/php.ini-dist hardened-php-4.3.11-0.2.7/php.ini-dist
--- php-4.3.11/php.ini-dist	2005-02-14 09:26:10.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/php.ini-dist	2005-04-07 02:08:26.000000000 +0200
@@ -1109,6 +1109,23 @@
 ;exif.decode_jis_motorola = JIS
 ;exif.decode_jis_intel    = JIS
 
+[varfilter]
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+; Hardened-PHP's variable filter
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+; Maximum number of input variables per request
+varfilter.max_request_variables = 200
+
+; Maximum characters in input variable names
+varfilter.max_varname_length = 64
+
+; Maximum length of input variable values
+varfilter.max_value_length = 10000
+
+; Maximum depth of input variable arrays
+varfilter.max_array_depth = 100
+
 ; Local Variables:
 ; tab-width: 4
 ; End:
diff -Nur php-4.3.11/php.ini-recommended hardened-php-4.3.11-0.2.7/php.ini-recommended
--- php-4.3.11/php.ini-recommended	2005-02-14 09:26:10.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/php.ini-recommended	2005-04-07 02:08:26.000000000 +0200
@@ -1107,6 +1107,23 @@
 ;exif.decode_jis_motorola = JIS
 ;exif.decode_jis_intel    = JIS
 
+[varfilter]
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+; Hardened-PHP's variable filter
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+; Maximum number of input variables per request
+varfilter.max_request_variables = 200
+
+; Maximum characters in input variable names
+varfilter.max_varname_length = 64
+
+; Maximum length of input variable values
+varfilter.max_value_length = 10000
+
+; Maximum depth of input variable arrays
+varfilter.max_array_depth = 100
+
 ; Local Variables:
 ; tab-width: 4
 ; End:
diff -Nur php-4.3.11/sapi/apache/mod_php4.c hardened-php-4.3.11-0.2.7/sapi/apache/mod_php4.c
--- php-4.3.11/sapi/apache/mod_php4.c	2004-07-21 18:25:28.000000000 +0200
+++ hardened-php-4.3.11-0.2.7/sapi/apache/mod_php4.c	2005-04-07 02:08:26.000000000 +0200
@@ -446,7 +446,7 @@
 	sapi_apache_get_fd,
 	sapi_apache_force_http_10,
 	sapi_apache_get_target_uid,
-	sapi_apache_get_target_gid
+	sapi_apache_get_target_gid,
 };
 /* }}} */
 
@@ -892,7 +892,11 @@
 	{
 		TSRMLS_FETCH();
 		if (PG(expose_php)) {
+#if HARDENED_PHP
+			ap_add_version_component("Hardened-PHP/" PHP_VERSION);
+#else
 			ap_add_version_component("PHP/" PHP_VERSION);
+#endif			
 		}
 	}
 #endif
diff -Nur php-4.3.11/sapi/apache2filter/sapi_apache2.c hardened-php-4.3.11-0.2.7/sapi/apache2filter/sapi_apache2.c
--- php-4.3.11/sapi/apache2filter/sapi_apache2.c	2005-01-07 07:28:36.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/sapi/apache2filter/sapi_apache2.c	2005-04-07 02:08:26.000000000 +0200
@@ -563,7 +563,11 @@
 {
 	TSRMLS_FETCH();
 	if (PG(expose_php)) {
+#if HARDENED_PHP
+		ap_add_version_component(p, "Hardened-PHP/" PHP_VERSION);
+#else
 		ap_add_version_component(p, "PHP/" PHP_VERSION);
+#endif
 	}
 }
 
diff -Nur php-4.3.11/sapi/apache2handler/sapi_apache2.c hardened-php-4.3.11-0.2.7/sapi/apache2handler/sapi_apache2.c
--- php-4.3.11/sapi/apache2handler/sapi_apache2.c	2005-03-10 12:39:04.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/sapi/apache2handler/sapi_apache2.c	2005-04-07 02:08:26.000000000 +0200
@@ -345,7 +345,11 @@
 {
 	TSRMLS_FETCH();
 	if (PG(expose_php)) {
+#if HARDENED_PHP
+		ap_add_version_component(p, "Hardened-PHP/" PHP_VERSION);
+#else
 		ap_add_version_component(p, "PHP/" PHP_VERSION);
+#endif
 	}
 }
 
diff -Nur php-4.3.11/sapi/cgi/cgi_main.c hardened-php-4.3.11-0.2.7/sapi/cgi/cgi_main.c
--- php-4.3.11/sapi/cgi/cgi_main.c	2005-02-11 03:12:30.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/sapi/cgi/cgi_main.c	2005-04-07 02:08:26.000000000 +0200
@@ -1435,11 +1435,19 @@
 							SG(headers_sent) = 1;
 							SG(request_info).no_headers = 1;
 						}
+#if HARDENED_PHP
+#if ZEND_DEBUG
+						php_printf("Hardened-PHP %s/%s (%s) (built: %s %s) (DEBUG)\nCopyright (c) 1997-2004 The PHP Group\n%s", PHP_VERSION, HARDENED_PHP_VERSION, sapi_module.name, __DATE__, __TIME__, get_zend_version());
+#else
+						php_printf("Hardened-PHP %s/%s (%s) (built: %s %s)\nCopyright (c) 1997-2004 The PHP Group\n%s", PHP_VERSION, HARDENED_PHP_VERSION, sapi_module.name, __DATE__, __TIME__, get_zend_version());
+#endif
+#else
 #if ZEND_DEBUG
 						php_printf("PHP %s (%s) (built: %s %s) (DEBUG)\nCopyright (c) 1997-2004 The PHP Group\n%s", PHP_VERSION, sapi_module.name, __DATE__, __TIME__, get_zend_version());
 #else
 						php_printf("PHP %s (%s) (built: %s %s)\nCopyright (c) 1997-2004 The PHP Group\n%s", PHP_VERSION, sapi_module.name, __DATE__, __TIME__, get_zend_version());
 #endif
+#endif
 						php_end_ob_buffers(1 TSRMLS_CC);
 						exit(1);
 						break;
diff -Nur php-4.3.11/sapi/cli/php_cli.c hardened-php-4.3.11-0.2.7/sapi/cli/php_cli.c
--- php-4.3.11/sapi/cli/php_cli.c	2005-03-22 16:09:36.000000000 +0100
+++ hardened-php-4.3.11-0.2.7/sapi/cli/php_cli.c	2005-04-07 02:08:26.000000000 +0200
@@ -652,11 +652,19 @@
 				if (php_request_startup(TSRMLS_C)==FAILURE) {
 					goto err;
 				}
+#if HARDENED_PHP
+#if ZEND_DEBUG
+				php_printf("Hardened-PHP %s/%s (%s) (built: %s %s) (DEBUG)\nCopyright (c) 1997-2004 The PHP Group\n%s", PHP_VERSION, HARDENED_PHP_VERSION, sapi_module.name, __DATE__, __TIME__, get_zend_version());
+#else
+				php_printf("Hardened-PHP %s/%s (%s) (built: %s %s)\nCopyright (c) 1997-2004 The PHP Group\n%s", PHP_VERSION, HARDENED_PHP_VERSION, sapi_module.name, __DATE__, __TIME__, get_zend_version());
+#endif
+#else
 #if ZEND_DEBUG
 				php_printf("PHP %s (%s) (built: %s %s) (DEBUG)\nCopyright (c) 1997-2004 The PHP Group\n%s", PHP_VERSION, sapi_module.name, __DATE__, __TIME__, get_zend_version());
 #else
 				php_printf("PHP %s (%s) (built: %s %s)\nCopyright (c) 1997-2004 The PHP Group\n%s", PHP_VERSION, sapi_module.name, __DATE__, __TIME__, get_zend_version());
 #endif
+#endif
 				php_end_ob_buffers(1 TSRMLS_CC);
 				exit_status=1;
 				goto out;