winutil.c

/*
   +----------------------------------------------------------------------+
   | PHP Version 7                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) The PHP Group                                          |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.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: Zeev Suraski <zeev@php.net>                                  |
   *         Pierre Joye <pierre@php.net>                                 |
   +----------------------------------------------------------------------+
 */

#include "php.h"
#include "winutil.h"
#include "codepage.h"
#include <bcrypt.h>
#include <lmcons.h>
#include <imagehlp.h>


PHP_WINUTIL_API char *php_win32_error_to_msg(HRESULT error)
{/*{{{*/
	wchar_t *bufw = NULL;
	char *buf;

	DWORD ret = FormatMessageW(
		FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
		NULL, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),	(LPWSTR)&bufw, 0, NULL
	);

	if (!ret || !bufw) {
		return "";
	}

	buf = php_win32_cp_conv_w_to_any(bufw, ret, PHP_WIN32_CP_IGNORE_LEN_P);

	LocalFree(bufw);

	return (buf ? buf : "");
}/*}}}*/

PHP_WINUTIL_API void php_win32_error_msg_free(char *msg)
{/*{{{*/
	if (msg && msg[0]) {
		free(msg);
	}
}/*}}}*/

int php_win32_check_trailing_space(const char * path, const size_t path_len)
{/*{{{*/
	if (path_len > MAXPATHLEN - 1) {
		return 1;
	}
	if (path) {
		if (path[0] == ' ' || path[path_len - 1] == ' ') {
			return 0;
		} else {
			return 1;
		}
	} else {
		return 0;
	}
}/*}}}*/

static BCRYPT_ALG_HANDLE bcrypt_algo;
static BOOL has_bcrypt_algo = 0;

#define NT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)

#ifdef PHP_EXPORTS
BOOL php_win32_shutdown_random_bytes(void)
{/*{{{*/
	BOOL ret = TRUE;

	if (has_bcrypt_algo) {
		ret = NT_SUCCESS(BCryptCloseAlgorithmProvider(bcrypt_algo, 0));
		has_bcrypt_algo = 0;
	}

	return ret;
}/*}}}*/

BOOL php_win32_init_random_bytes(void)
{/*{{{*/
	if (has_bcrypt_algo) {
		return TRUE;
	}

	has_bcrypt_algo = NT_SUCCESS(BCryptOpenAlgorithmProvider(&bcrypt_algo, BCRYPT_RNG_ALGORITHM, NULL, 0));

	return has_bcrypt_algo;
}/*}}}*/
#endif

PHP_WINUTIL_API int php_win32_get_random_bytes(unsigned char *buf, size_t size)
{  /* {{{ */

	BOOL ret;

#if 0
	/* Currently we fail on startup, with CNG API it shows no regressions so far and is secure.
		Should switch on and try to reinit, if it fails too often on startup. This means also
		bringing locks back. */
	if (has_bcrypt_algo == 0) {
		return FAILURE;
	}
#endif

	/* No sense to loop here, the limit is huge enough. */
	ret = NT_SUCCESS(BCryptGenRandom(bcrypt_algo, buf, (ULONG)size, 0));

	return ret ? SUCCESS : FAILURE;
}
/* }}} */


/*
* This functions based on the code from the UNIXem project under
* the BSD like license. Modified for PHP by ab@php.net
*
* Home:    http://synesis.com.au/software/
*
* Copyright (c) 2005-2010, Matthew Wilson and Synesis Software
*/

PHP_WINUTIL_API int php_win32_code_to_errno(unsigned long w32Err)
{/*{{{*/
    size_t  i;

    struct code_to_errno_map
    {
        unsigned long   w32Err;
        int             eerrno;
    };

    static const struct code_to_errno_map errmap[] =
    {
        /*   1 */       {   ERROR_INVALID_FUNCTION          ,   EINVAL          }
        /*   2 */   ,   {   ERROR_FILE_NOT_FOUND            ,   ENOENT          }
        /*   3 */   ,   {   ERROR_PATH_NOT_FOUND            ,   ENOENT          }
        /*   4 */   ,   {   ERROR_TOO_MANY_OPEN_FILES       ,   EMFILE          }
        /*   5 */   ,   {   ERROR_ACCESS_DENIED             ,   EACCES          }
        /*   6 */   ,   {   ERROR_INVALID_HANDLE            ,   EBADF           }
        /*   7 */   ,   {   ERROR_ARENA_TRASHED             ,   ENOMEM          }
        /*   8 */   ,   {   ERROR_NOT_ENOUGH_MEMORY         ,   ENOMEM          }
        /*   9 */   ,   {   ERROR_INVALID_BLOCK             ,   ENOMEM          }
        /*  10 */   ,   {   ERROR_BAD_ENVIRONMENT           ,   E2BIG           }
        /*  11 */   ,   {   ERROR_BAD_FORMAT                ,   ENOEXEC         }
        /*  12 */   ,   {   ERROR_INVALID_ACCESS            ,   EINVAL          }
        /*  13 */   ,   {   ERROR_INVALID_DATA              ,   EINVAL          }
        /*  14 */   ,   {   ERROR_OUTOFMEMORY               ,   ENOMEM          }
        /*  15 */   ,   {   ERROR_INVALID_DRIVE             ,   ENOENT          }
        /*  16 */   ,   {   ERROR_CURRENT_DIRECTORY         ,   ECURDIR         }
        /*  17 */   ,   {   ERROR_NOT_SAME_DEVICE           ,   EXDEV           }
        /*  18 */   ,   {   ERROR_NO_MORE_FILES             ,   ENOENT          }
        /*  19 */   ,   {   ERROR_WRITE_PROTECT             ,   EROFS           }
        /*  20 */   ,   {   ERROR_BAD_UNIT                  ,   ENXIO           }
        /*  21 */   ,   {   ERROR_NOT_READY                 ,   EBUSY           }
        /*  22 */   ,   {   ERROR_BAD_COMMAND               ,   EIO             }
        /*  23 */   ,   {   ERROR_CRC                       ,   EIO             }
        /*  24 */   ,   {   ERROR_BAD_LENGTH                ,   EIO             }
        /*  25 */   ,   {   ERROR_SEEK                      ,   EIO             }
        /*  26 */   ,   {   ERROR_NOT_DOS_DISK              ,   EIO             }
        /*  27 */   ,   {   ERROR_SECTOR_NOT_FOUND          ,   ENXIO           }
        /*  28 */   ,   {   ERROR_OUT_OF_PAPER              ,   EBUSY           }
        /*  29 */   ,   {   ERROR_WRITE_FAULT               ,   EIO             }
        /*  30 */   ,   {   ERROR_READ_FAULT                ,   EIO             }
        /*  31 */   ,   {   ERROR_GEN_FAILURE               ,   EIO             }
        /*  32 */   ,   {   ERROR_SHARING_VIOLATION         ,   EAGAIN          }
        /*  33 */   ,   {   ERROR_LOCK_VIOLATION            ,   EACCES          }
        /*  34 */   ,   {   ERROR_WRONG_DISK                ,   ENXIO           }
        /*  35 */   ,   {   35                              ,   ENFILE          }
        /*  36 */   ,   {   ERROR_SHARING_BUFFER_EXCEEDED   ,   ENFILE          }
        /*  37 */   ,   {   ERROR_HANDLE_EOF                ,   EINVAL          }
        /*  38 */   ,   {   ERROR_HANDLE_DISK_FULL          ,   ENOSPC          }
#if 0
        /*  39 */   ,   {   0                               ,   0               }
        /*  40 */   ,   {   0                               ,   0               }
        /*  41 */   ,   {   0                               ,   0               }
        /*  42 */   ,   {   0                               ,   0               }
        /*  43 */   ,   {   0                               ,   0               }
        /*  44 */   ,   {   0                               ,   0               }
        /*  45 */   ,   {   0                               ,   0               }
        /*  46 */   ,   {   0                               ,   0               }
        /*  47 */   ,   {   0                               ,   0               }
        /*  48 */   ,   {   0                               ,   0               }
        /*  49 */   ,   {   0                               ,   0               }
#endif
        /*  50 */   ,   {   ERROR_NOT_SUPPORTED             ,   ENOSYS          }
#if 0
        /*  51 */   ,   {   0                               ,   0               }
        /*  52 */   ,   {   0                               ,   0               }
#endif
        /*  53 */   ,   {   ERROR_BAD_NETPATH               ,   ENOENT          }
#if 0
        /*  54 */   ,   {   0                               ,   0               }
        /*  55 */   ,   {   0                               ,   0               }
        /*  56 */   ,   {   0                               ,   0               }
        /*  57 */   ,   {   0                               ,   0               }
        /*  58 */   ,   {   0                               ,   0               }
        /*  59 */   ,   {   0                               ,   0               }
        /*  60 */   ,   {   0                               ,   0               }
        /*  61 */   ,   {   0                               ,   0               }
        /*  62 */   ,   {   0                               ,   0               }
        /*  63 */   ,   {   0                               ,   0               }
        /*  64 */   ,   {   0                               ,   0               }
#endif
        /*  65 */   ,   {   ERROR_NETWORK_ACCESS_DENIED     ,   EACCES          }
#if 0
        /*  66 */   ,   {   0                               ,   0               }
#endif
        /*  67 */   ,   {   ERROR_BAD_NET_NAME              ,   ENOENT          }
#if 0
        /*  68 */   ,   {   0                               ,   0               }
        /*  69 */   ,   {   0                               ,   0               }
        /*  70 */   ,   {   0                               ,   0               }
        /*  71 */   ,   {   0                               ,   0               }
        /*  72 */   ,   {   0                               ,   0               }
        /*  73 */   ,   {   0                               ,   0               }
        /*  74 */   ,   {   0                               ,   0               }
        /*  75 */   ,   {   0                               ,   0               }
        /*  76 */   ,   {   0                               ,   0               }
        /*  77 */   ,   {   0                               ,   0               }
        /*  78 */   ,   {   0                               ,   0               }
        /*  79 */   ,   {   0                               ,   0               }
#endif
        /*  80 */   ,   {   ERROR_FILE_EXISTS               ,   EEXIST          }
#if 0
        /*  81 */   ,   {   0                               ,   0               }
#endif
        /*  82 */   ,   {   ERROR_CANNOT_MAKE               ,   EACCES          }
        /*  83 */   ,   {   ERROR_FAIL_I24                  ,   EACCES          }
#if 0
        /*  84 */   ,   {   0                               ,   0               }
        /*  85 */   ,   {   0                               ,   0               }
        /*  86 */   ,   {   0                               ,   0               }
#endif
        /*  87 */   ,   {   ERROR_INVALID_PARAMETER         ,   EINVAL          }
#if 0
        /*  88 */   ,   {   0                               ,   0               }
#endif
        /*  89 */   ,   {   ERROR_NO_PROC_SLOTS             ,   EAGAIN          }
#if 0
        /*  90 */   ,   {   0                               ,   0               }
        /*  91 */   ,   {   0                               ,   0               }
        /*  92 */   ,   {   0                               ,   0               }
        /*  93 */   ,   {   0                               ,   0               }
        /*  94 */   ,   {   0                               ,   0               }
        /*  95 */   ,   {   0                               ,   0               }
        /*  96 */   ,   {   0                               ,   0               }
        /*  97 */   ,   {   0                               ,   0               }
        /*  98 */   ,   {   0                               ,   0               }
        /*  99 */   ,   {   0                               ,   0               }
        /* 100 */   ,   {   0                               ,   0               }
        /* 101 */   ,   {   0                               ,   0               }
        /* 102 */   ,   {   0                               ,   0               }
        /* 103 */   ,   {   0                               ,   0               }
        /* 104 */   ,   {   0                               ,   0               }
        /* 105 */   ,   {   0                               ,   0               }
        /* 106 */   ,   {   0                               ,   0               }
        /* 107 */   ,   {   0                               ,   0               }
#endif
        /* 108 */   ,   {   ERROR_DRIVE_LOCKED              ,   EACCES          }
        /* 109 */   ,   {   ERROR_BROKEN_PIPE               ,   EPIPE           }
#if 0
        /* 110 */   ,   {   0                               ,   0               }
#endif
        /* 111 */   ,   {   ERROR_BUFFER_OVERFLOW           ,   ENAMETOOLONG    }
        /* 112 */   ,   {   ERROR_DISK_FULL                 ,   ENOSPC          }
#if 0
        /* 113 */   ,   {   0                               ,   0               }
#endif
        /* 114 */   ,   {   ERROR_INVALID_TARGET_HANDLE     ,   EBADF           }
#if 0
        /* 115 */   ,   {   0                               ,   0               }
        /* 116 */   ,   {   0                               ,   0               }
        /* 117 */   ,   {   0                               ,   0               }
        /* 118 */   ,   {   0                               ,   0               }
        /* 119 */   ,   {   0                               ,   0               }
        /* 120 */   ,   {   0                               ,   0               }
        /* 121 */   ,   {   0                               ,   0               }
#endif
        /* 122 */   ,   {   ERROR_INSUFFICIENT_BUFFER       ,   ERANGE          }
        /* 123 */   ,   {   ERROR_INVALID_NAME              ,   ENOENT          }
        /* 124 */   ,   {   ERROR_INVALID_HANDLE            ,   EINVAL          }
#if 0
        /* 125 */   ,   {   0                               ,   0               }
#endif
        /* 126 */   ,   {   ERROR_MOD_NOT_FOUND             ,   ENOENT          }
        /* 127 */   ,   {   ERROR_PROC_NOT_FOUND            ,   ENOENT          }
        /* 128 */   ,   {   ERROR_WAIT_NO_CHILDREN          ,   ECHILD          }
        /* 129 */   ,   {   ERROR_CHILD_NOT_COMPLETE        ,   ECHILD          }
        /* 130 */   ,   {   ERROR_DIRECT_ACCESS_HANDLE      ,   EBADF           }
        /* 131 */   ,   {   ERROR_NEGATIVE_SEEK             ,   EINVAL          }
        /* 132 */   ,   {   ERROR_SEEK_ON_DEVICE            ,   EACCES          }
#if 0
        /* 133 */   ,   {   0                               ,   0               }
        /* 134 */   ,   {   0                               ,   0               }
        /* 135 */   ,   {   0                               ,   0               }
        /* 136 */   ,   {   0                               ,   0               }
        /* 137 */   ,   {   0                               ,   0               }
        /* 138 */   ,   {   0                               ,   0               }
        /* 139 */   ,   {   0                               ,   0               }
        /* 140 */   ,   {   0                               ,   0               }
        /* 141 */   ,   {   0                               ,   0               }
        /* 142 */   ,   {   0                               ,   0               }
        /* 143 */   ,   {   0                               ,   0               }
        /* 144 */   ,   {   0                               ,   0               }
#endif
        /* 145 */   ,   {   ERROR_DIR_NOT_EMPTY             ,   ENOTEMPTY       }
#if 0
        /* 146 */   ,   {   0                               ,   0               }
        /* 147 */   ,   {   0                               ,   0               }
        /* 148 */   ,   {   0                               ,   0               }
        /* 149 */   ,   {   0                               ,   0               }
        /* 150 */   ,   {   0                               ,   0               }
        /* 151 */   ,   {   0                               ,   0               }
        /* 152 */   ,   {   0                               ,   0               }
        /* 153 */   ,   {   0                               ,   0               }
        /* 154 */   ,   {   0                               ,   0               }
        /* 155 */   ,   {   0                               ,   0               }
        /* 156 */   ,   {   0                               ,   0               }
        /* 157 */   ,   {   0                               ,   0               }
#endif
        /* 158 */   ,   {   ERROR_NOT_LOCKED                ,   EACCES          }
#if 0
        /* 159 */   ,   {   0                               ,   0               }
        /* 160 */   ,   {   0                               ,   0               }
#endif
        /* 161 */   ,   {   ERROR_BAD_PATHNAME              ,   ENOENT          }
#if 0
        /* 162 */   ,   {   0                               ,   0               }
        /* 163 */   ,   {   0                               ,   0               }
#endif
        /* 164 */   ,   {   ERROR_MAX_THRDS_REACHED         ,   EAGAIN          }
#if 0
        /* 165 */   ,   {   0                               ,   0               }
        /* 166 */   ,   {   0                               ,   0               }
#endif
        /* 167 */   ,   {   ERROR_LOCK_FAILED               ,   EACCES          }
#if 0
        /* 168 */   ,   {   0                               ,   0               }
        /* 169 */   ,   {   0                               ,   0               }
        /* 170 */   ,   {   0                               ,   0               }
        /* 171 */   ,   {   0                               ,   0               }
        /* 172 */   ,   {   0                               ,   0               }
        /* 173 */   ,   {   0                               ,   0               }
        /* 174 */   ,   {   0                               ,   0               }
        /* 175 */   ,   {   0                               ,   0               }
        /* 176 */   ,   {   0                               ,   0               }
        /* 177 */   ,   {   0                               ,   0               }
        /* 178 */   ,   {   0                               ,   0               }
        /* 179 */   ,   {   0                               ,   0               }
        /* 180 */   ,   {   0                               ,   0               }
        /* 181 */   ,   {   0                               ,   0               }
        /* 182 */   ,   {   0                               ,   0               }
#endif
        /* 183 */   ,   {   ERROR_ALREADY_EXISTS            ,   EEXIST          }
#if 0
        /* 184 */   ,   {   0                               ,   0               }
        /* 185 */   ,   {   0                               ,   0               }
        /* 186 */   ,   {   0                               ,   0               }
        /* 187 */   ,   {   0                               ,   0               }
        /* 188 */   ,   {   0                               ,   0               }
        /* 189 */   ,   {   0                               ,   0               }
        /* 190 */   ,   {   0                               ,   0               }
        /* 191 */   ,   {   0                               ,   0               }
        /* 192 */   ,   {   0                               ,   0               }
        /* 193 */   ,   {   0                               ,   0               }
        /* 194 */   ,   {   0                               ,   0               }
        /* 195 */   ,   {   0                               ,   0               }
        /* 196 */   ,   {   0                               ,   0               }
        /* 197 */   ,   {   0                               ,   0               }
        /* 198 */   ,   {   0                               ,   0               }
        /* 199 */   ,   {   0                               ,   0               }
#endif

        /* 206 */   ,   {   ERROR_FILENAME_EXCED_RANGE      ,   ENAMETOOLONG    }

        /* 215 */   ,   {   ERROR_NESTING_NOT_ALLOWED       ,   EAGAIN          }
		/* 258 */   ,   { WAIT_TIMEOUT, ETIME}

        /* 267 */   ,   {   ERROR_DIRECTORY                 ,   ENOTDIR         }
		/* 336 */   ,   {   ERROR_DIRECTORY_NOT_SUPPORTED   ,   EISDIR          }

        /* 996 */   ,   {   ERROR_IO_INCOMPLETE             ,   EAGAIN          }
        /* 997 */   ,   {   ERROR_IO_PENDING                ,   EAGAIN          }

        /* 1004 */   ,  {   ERROR_INVALID_FLAGS             ,   EINVAL          }
        /* 1113 */   ,  {   ERROR_NO_UNICODE_TRANSLATION    ,   EINVAL          }
        /* 1168 */   ,  {   ERROR_NOT_FOUND                 ,   ENOENT          }
        /* 1224 */   ,  {   ERROR_USER_MAPPED_FILE          ,   EACCES          }
        /* 1314 */   ,  {   ERROR_PRIVILEGE_NOT_HELD        ,   EACCES          }
        /* 1816 */  ,   {   ERROR_NOT_ENOUGH_QUOTA          ,   ENOMEM          }
					,   {   ERROR_ABANDONED_WAIT_0          ,   EIO }
		/* 1464 */	,	{	ERROR_SYMLINK_NOT_SUPPORTED		,	EINVAL			}
		/* 4390 */	,	{	ERROR_NOT_A_REPARSE_POINT		,	EINVAL			}
    };

    for(i = 0; i < sizeof(errmap)/sizeof(struct code_to_errno_map); ++i)
    {
        if(w32Err == errmap[i].w32Err)
        {
            return errmap[i].eerrno;
        }
    }

    assert(!"Unrecognised value");

    return EINVAL;
}/*}}}*/

PHP_WINUTIL_API char *php_win32_get_username(void)
{/*{{{*/
	wchar_t unamew[UNLEN + 1];
	size_t uname_len;
	char *uname;
	DWORD unsize = UNLEN;

	GetUserNameW(unamew, &unsize);
	uname = php_win32_cp_conv_w_to_any(unamew, unsize - 1, &uname_len);
	if (!uname) {
		return NULL;
	}

	/* Ensure the length doesn't overflow. */
	if (uname_len > UNLEN) {
		uname[uname_len] = '\0';
	}

	return uname;
}/*}}}*/

PHP_WINUTIL_API BOOL php_win32_image_compatible(const char *name, const char *path, char **err)
{/*{{{*/
	PLOADED_IMAGE img = ImageLoad(name, NULL);

	if (!img) {
		DWORD _err = GetLastError();
		char *err_txt = php_win32_error_to_msg(_err);
		spprintf(err, 0, "Failed to load %s, %s", name, err_txt);
		free(err_txt);
		return FALSE;
	}
	
	DWORD major = img->FileHeader->OptionalHeader.MajorLinkerVersion;
	DWORD minor = img->FileHeader->OptionalHeader.MinorLinkerVersion;

#if PHP_LINKER_MAJOR == 14
	/* VS 2015, 2017 and 2019 are binary compatible, but only forward compatible.
		It should be fine, if we load a module linked with an older one into
		the core linked with the newer one, but not the otherway round.
		Otherwise, if the linker major version is not same, it is an error, as
		per the current knowledge.
		
		This check is to be extended as new VS versions come out. */
	if (14 == major && PHP_LINKER_MINOR < minor || PHP_LINKER_MAJOR != major)
#else
	if (PHP_LINKER_MAJOR != major)
#endif
	{
		spprintf(err, 0, "Can't load module '%s' as it's linked with %u.%u, but the core is linked with %d.%d", name, major, minor, PHP_LINKER_MAJOR, PHP_LINKER_MINOR);
		ImageUnload(img);
		return FALSE;
	}

	ImageUnload(img);

	return TRUE;
}/*}}}*/

/* Expect a CRT name DLL. */
PHP_WINUTIL_API BOOL php_win32_crt_compatible(const char *name, char **err)
{/*{{{*/
	PLOADED_IMAGE img = ImageLoad(name, NULL);

	if (!img) {
		DWORD _err = GetLastError();
		char *err_txt = php_win32_error_to_msg(_err);
		spprintf(err, 0, "Failed to load %s, %s", name, err_txt);
		free(err_txt);
		return FALSE;
	}
	
	DWORD major = img->FileHeader->OptionalHeader.MajorLinkerVersion;
	DWORD minor = img->FileHeader->OptionalHeader.MinorLinkerVersion;

#if PHP_LINKER_MAJOR == 14
	DWORD core_minor = (DWORD)(PHP_LINKER_MINOR/10);
	DWORD comp_minor = (DWORD)(minor/10);
	if (14 == major && core_minor > comp_minor || PHP_LINKER_MAJOR != major)
#else
	if (PHP_LINKER_MAJOR != major)
#endif
	{
		spprintf(err, 0, "'%s' %u.%u is not compatible with this PHP build linked with %d.%d", name, major, minor, PHP_LINKER_MAJOR, PHP_LINKER_MINOR);
		ImageUnload(img);
		return FALSE;
	}
	ImageUnload(img);

	return TRUE;
}/*}}}*/