src/platform_windows.cpp
author Krista Bennett <krista@pep-project.org>
Wed, 15 Mar 2017 18:02:46 +0100
changeset 1674 5639f969866a
parent 1513 e7f7e42385b5
child 1796 51a507ac30e0
child 1804 775bb90eccd5
permissions -rw-r--r--
Added pgp_encrypt_only stubs for NetPGP
vb@1513
     1
// This file is under GNU General Public License 3.0
vb@1513
     2
// see LICENSE.txt
vb@1513
     3
vb@1513
     4
// Windows platform specification
vb@0
     5
vb@0
     6
#define WIN32_LEAN_AND_MEAN
vb@0
     7
#ifndef UNICODE
vb@0
     8
#define UNICODE
vb@0
     9
#endif
vb@0
    10
#define _WIN32_WINNT 0x0600
vb@0
    11
vb@0
    12
#include <windows.h>
vb@54
    13
#define _CRT_RAND_S
vb@54
    14
#include <stdlib.h>
vb@0
    15
#include <assert.h>
vb@80
    16
#include <string.h>
vb@0
    17
#include <string>
vb@0
    18
#include <stdexcept>
vb@0
    19
#include "platform_windows.h"
vb@130
    20
#include <fcntl.h>
vb@130
    21
#include <sys\stat.h>
vb@0
    22
vb@0
    23
#ifndef WC_ERR_INVALID_CHARS
vb@0
    24
#define WC_ERR_INVALID_CHARS      0x00000080  // error for invalid chars
vb@0
    25
#endif
vb@0
    26
vb@0
    27
using namespace std;
vb@0
    28
vb@0
    29
static string utf8_string(wstring wstr) {
vb@0
    30
    string result;
vb@0
    31
vb@0
    32
    if (wstr.length()) {
vb@0
    33
        int size = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS,
vb@0
    34
                wstr.c_str(), -1, NULL, 0, NULL, NULL);
vb@0
    35
        assert(size);
vb@0
    36
        if (size) {
vb@0
    37
            char *buf = new char[size];
vb@0
    38
            WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, wstr.c_str(),
vb@0
    39
                    -1, buf, size, NULL, NULL);
vb@0
    40
            result = buf;
vb@0
    41
            delete[] buf;
vb@0
    42
        } else
vb@0
    43
            throw out_of_range("input wstring is not valid"
vb@0
    44
                    " while converting UTF-16 to UTF-8.");
vb@0
    45
    }
vb@0
    46
vb@0
    47
    return result;
vb@0
    48
}
vb@0
    49
vb@0
    50
static wstring utf16_string(string str) {
vb@0
    51
    wstring result;
vb@0
    52
vb@0
    53
    if (str.length()) {
vb@0
    54
        int size = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
vb@0
    55
                str.c_str(), -1, NULL, 0);
vb@0
    56
        assert(size);
vb@0
    57
        if (size) {
vb@0
    58
            wchar_t * buf = new wchar_t[size];
vb@0
    59
            MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str.c_str(), -1,
vb@0
    60
                    buf, size);
vb@0
    61
            result = buf;
vb@0
    62
            delete[] buf;
vb@0
    63
        } else
vb@0
    64
            throw out_of_range("input string is not valid"
vb@0
    65
                    " while converting UTF-8 to UTF-16.");
vb@0
    66
    }
vb@0
    67
vb@0
    68
    return result;
vb@0
    69
}
vb@0
    70
vb@0
    71
static bool readRegistryString(
vb@0
    72
        HKEY hKey, LPCTSTR lpSubKey, LPCTSTR lpValueName, LPTSTR lpResult,
vb@0
    73
        DWORD dwSize, LPCTSTR lpDefault
vb@0
    74
    )
vb@0
    75
{
vb@0
    76
    assert(lpResult);
vb@0
    77
vb@0
    78
	HKEY theKey;
vb@0
    79
	DWORD type;
vb@0
    80
	DWORD bytesCopied = dwSize;
vb@0
    81
	HRESULT result;
vb@0
    82
vb@0
    83
	result = RegOpenKeyEx(hKey, lpSubKey, 0, KEY_READ, &theKey);
vb@0
    84
	if (result != ERROR_SUCCESS) {
vb@0
    85
		if (lpDefault) {
vb@0
    86
			wcsncpy_s(lpResult, dwSize, lpDefault, _TRUNCATE);
vb@0
    87
			return true;
vb@0
    88
		}
vb@0
    89
		else
vb@0
    90
			return false;
vb@0
    91
	}
vb@0
    92
vb@0
    93
	result = RegQueryValueEx(theKey, lpValueName, NULL, &type,
vb@0
    94
            (LPBYTE) lpResult, &bytesCopied);
vb@0
    95
    if (result != ERROR_SUCCESS || (type != REG_EXPAND_SZ && type != REG_SZ)) {
vb@0
    96
		if (lpDefault) {
vb@0
    97
			wcsncpy_s(lpResult, dwSize, lpDefault, _TRUNCATE);
vb@0
    98
			RegCloseKey(theKey);
vb@0
    99
			return true;
vb@0
   100
		}
vb@0
   101
		else {
vb@0
   102
			RegCloseKey(theKey);
vb@0
   103
			return false;
vb@0
   104
		}
vb@0
   105
	}
vb@0
   106
vb@0
   107
	RegCloseKey(theKey);
vb@0
   108
	return true;
vb@0
   109
}
vb@0
   110
vb@0
   111
static const DWORD PATH_BUF_SIZE = 32768;
vb@0
   112
vb@0
   113
static inline string managementPath(const char *file_path, const char *file_name)
vb@0
   114
{
vb@0
   115
    string path;
vb@0
   116
	static TCHAR tPath[PATH_BUF_SIZE];
vb@0
   117
vb@0
   118
    DWORD length = ExpandEnvironmentStringsW(utf16_string(file_path).c_str(),
vb@0
   119
            tPath, PATH_BUF_SIZE);
vb@0
   120
	assert(length);
vb@0
   121
    if (length == 0)
vb@8
   122
        throw bad_alloc(); // BUG: there are other errors possible beside out of memory
vb@0
   123
vb@0
   124
	CreateDirectory(tPath, NULL);
vb@0
   125
	DWORD error = GetLastError();
vb@0
   126
vb@0
   127
	path = utf8_string(tPath);
vb@0
   128
	path += "\\";
vb@0
   129
	path += file_name;
vb@0
   130
vb@0
   131
	return path;
vb@0
   132
}
vb@0
   133
vb@0
   134
extern "C" {
vb@0
   135
vb@0
   136
void *dlopen(const char *filename, int flag) {
vb@0
   137
	static TCHAR path[PATH_BUF_SIZE];
vb@0
   138
vb@0
   139
    assert(filename);
vb@0
   140
	assert(flag == RTLD_LAZY); // only lazy binding is implemented
vb@0
   141
vb@0
   142
    bool result = readRegistryString(HKEY_LOCAL_MACHINE,
vb@0
   143
            TEXT("SOFTWARE\\GNU\\GnuPG"), TEXT("Install Directory"), path,
vb@0
   144
            PATH_BUF_SIZE, NULL);
vb@0
   145
	assert(result);
vb@0
   146
	if (!result)
vb@0
   147
		return NULL;
vb@0
   148
vb@0
   149
    SetDllDirectory(TEXT(""));
vb@0
   150
    BOOL _result = SetDllDirectory(path);
vb@0
   151
    assert(_result != 0);
vb@0
   152
    if (_result == 0)
vb@0
   153
        return NULL;
vb@0
   154
vb@0
   155
	HMODULE module = LoadLibrary(utf16_string(filename).c_str());
vb@0
   156
    SetDllDirectory(NULL);
vb@0
   157
	if (module == NULL)
vb@0
   158
		return NULL;
vb@0
   159
	else
vb@0
   160
		return (void *) module;
vb@0
   161
}
vb@0
   162
vb@0
   163
int dlclose(void *handle) {
vb@0
   164
	if (FreeLibrary((HMODULE) handle))
vb@0
   165
		return 0;
vb@0
   166
	else
vb@0
   167
		return 1;
vb@0
   168
}
vb@0
   169
vb@0
   170
void *dlsym(void *handle, const char *symbol) {
vb@0
   171
	return (void *) (intptr_t) GetProcAddress((HMODULE) handle, symbol);
vb@0
   172
}
vb@0
   173
vb@55
   174
const char *windoze_local_db(void) {
vb@0
   175
	static string path;
vb@0
   176
	if (path.length() == 0)
vb@0
   177
        path = managementPath("%LOCALAPPDATA%\\pEp", "management.db");
vb@0
   178
    return path.c_str();
vb@0
   179
}
vb@0
   180
vb@55
   181
const char *windoze_system_db(void) {
vb@0
   182
	static string path;
vb@0
   183
	if (path.length() == 0)
vb@0
   184
		path = managementPath("%ALLUSERSPROFILE%\\pEp", "system.db");
vb@0
   185
    return path.c_str();
vb@0
   186
}
vb@0
   187
vb@55
   188
const char *gpg_conf(void)
vb@0
   189
{
vb@0
   190
    static string path;
vb@0
   191
    if (path.length() == 0)
vb@0
   192
        path = managementPath("%APPDATA%\\gnupg", "gpg.conf");
vb@0
   193
    return path.c_str();
vb@0
   194
}
vb@0
   195
krista@763
   196
const char *gpg_agent_conf(void)
krista@763
   197
{
krista@763
   198
    static string agent_path;
krista@763
   199
    if (agent_path.length() == 0)
krista@763
   200
        agent_path = managementPath("%APPDATA%\\gnupg", "gpg-agent.conf");
krista@763
   201
    return agent_path.c_str();
krista@763
   202
}
krista@763
   203
krista@763
   204
vb@54
   205
long random(void)
vb@54
   206
{
vb@54
   207
    unsigned int r;
vb@54
   208
    errno_t e;
vb@54
   209
vb@54
   210
    assert(sizeof(unsigned int) == sizeof(long)); // this is Windoze
vb@54
   211
vb@54
   212
    do {
vb@54
   213
        e = rand_s(&r);
vb@54
   214
    } while (e);
vb@54
   215
vb@130
   216
    return (long) (r & ((1U<<31)-1));
vb@54
   217
}
vb@54
   218
vb@82
   219
char *strndup(const char *s1, size_t n)
vb@82
   220
{
vb@130
   221
    char *str = (char *) calloc(n + 1, 1);
vb@82
   222
    if (str == NULL)
vb@82
   223
        return NULL;
vb@82
   224
vb@82
   225
    strncpy(str, s1, n);
vb@82
   226
    return str;
vb@82
   227
}
vb@80
   228
vb@282
   229
char *stpcpy(char *dst, const char *src)
vb@282
   230
{
vb@282
   231
    for (;; ++dst, ++src) {
vb@282
   232
        *dst = *src;
vb@282
   233
        if (*dst == 0)
vb@282
   234
            break;
vb@282
   235
    }
vb@282
   236
    return dst;
vb@282
   237
}
vb@282
   238
krista@920
   239
size_t strlcpy(char* dst, const	char* src, size_t size) {
krista@920
   240
    size_t retval = strlen(src);
krista@920
   241
    size_t size_to_copy = (retval < size ? retval : size - 1);
krista@920
   242
    
krista@920
   243
    // strlcpy doc says src and dst not allowed to overlap, as
krista@920
   244
    // it's undefined. So this is acceptable:
krista@920
   245
    memcpy((void*)dst, (void*)src, size_to_copy); // no defined error return, but strcpy doesn't either
krista@920
   246
    dst[size_to_copy] = '\0';
krista@920
   247
    return retval;
krista@920
   248
}
krista@920
   249
size_t strlcat(char* dst, const	char* src, size_t size) {
krista@920
   250
    size_t start_len = strnlen(dst, size);
krista@920
   251
    if (start_len == size)
krista@920
   252
        return size; // no copy, no null termination in size bytes, according to spec
krista@920
   253
    
krista@920
   254
    size_t add_len = strlen(src);
krista@920
   255
    size_t retval = start_len + add_len;
krista@920
   256
    size_t size_to_copy = (retval < size ? add_len : (size - start_len) - 1);
krista@920
   257
    
krista@920
   258
    // strlcat doc says src and dst not allowed to overlap, as
krista@920
   259
    // it's undefined. So this is acceptable:
krista@920
   260
    memcpy((void*)(dst + start_len), (void*)src, size_to_copy); // no defined error return, but strcpy doesn't either
krista@920
   261
    dst[start_len + size_to_copy] = '\0';
krista@920
   262
    return retval;
krista@920
   263
}
krista@920
   264
vb@140
   265
int mkstemp(char *templ)
vb@140
   266
{
vb@140
   267
    char *pathname = _mktemp(templ);
vb@140
   268
    if (errno)
vb@140
   269
        return -1;
vb@140
   270
    return _open(pathname, _O_RDWR | _O_CREAT | _O_EXCL, _S_IREAD | _S_IWRITE);
vb@140
   271
}
vb@130
   272
markus@1226
   273
void uuid_generate_random(pEpUUID out)
vb@948
   274
{
vb@948
   275
    RPC_STATUS rpc_status = UuidCreate(out);
vb@948
   276
    assert(rpc_status == RPC_S_OK);
vb@948
   277
}
vb@948
   278
markus@1226
   279
int uuid_parse(char *in, pEpUUID uu)
vb@948
   280
{
vb@948
   281
    unsigned char *_in = (unsigned char *) in;
markus@1226
   282
    RPC_STATUS rpc_status = UuidFromStringA(_in, uu);
vb@948
   283
    assert(rpc_status == RPC_S_OK);
vb@948
   284
    if (rpc_status == RPC_S_INVALID_STRING_UUID)
vb@948
   285
        return -1;
vb@948
   286
    return 0;
vb@948
   287
}
vb@948
   288
markus@1226
   289
void uuid_unparse_upper(pEpUUID uu, uuid_string_t out)
vb@948
   290
{
markus@1226
   291
    unsigned char *_out = (unsigned char*)out;
vb@948
   292
    RPC_CSTR str;
markus@1226
   293
    RPC_STATUS rpc_status = UuidToStringA(uu, &str);
vb@948
   294
    assert(rpc_status == RPC_S_OK);
vb@948
   295
    if (rpc_status == RPC_S_OK) {
vb@948
   296
        memcpy(out, str, 36);
vb@948
   297
        out[36] = 0;
markus@1226
   298
        RpcStringFreeA(&str);
vb@948
   299
    }
vb@948
   300
    else { // if (rpc_status == RPC_S_OUT_OF_MEMORY)
vb@948
   301
        memset(out, 0, 37);
vb@948
   302
    }
vb@948
   303
}
vb@948
   304
markus@1258
   305
time_t timegm(struct tm* tm) {
markus@1258
   306
    return _mkgmtime(tm);
markus@1258
   307
}
markus@1258
   308
vb@0
   309
} // "C"