mirror of https://github.com/openssl/openssl.git
306 lines
8.4 KiB
C
306 lines
8.4 KiB
C
/*
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* Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <windows.h>
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#include <stdlib.h>
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#include <string.h>
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#include <malloc.h>
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#if defined(CP_UTF8)
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static UINT saved_cp;
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static int newargc;
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static char **newargv;
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static void cleanup(void)
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{
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int i;
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SetConsoleOutputCP(saved_cp);
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for (i = 0; i < newargc; i++)
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free(newargv[i]);
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free(newargv);
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}
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/*
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* Incrementally [re]allocate newargv and keep it NULL-terminated.
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*/
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static int validate_argv(int argc)
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{
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static int size = 0;
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if (argc >= size) {
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char **ptr;
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while (argc >= size)
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size += 64;
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ptr = realloc(newargv, size * sizeof(newargv[0]));
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if (ptr == NULL)
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return 0;
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(newargv = ptr)[argc] = NULL;
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} else {
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newargv[argc] = NULL;
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}
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return 1;
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}
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static int process_glob(WCHAR *wstr, int wlen)
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{
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int i, slash, udlen;
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WCHAR saved_char;
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WIN32_FIND_DATAW data;
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HANDLE h;
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/*
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* Note that we support wildcard characters only in filename part
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* of the path, and not in directories. Windows users are used to
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* this, that's why recursive glob processing is not implemented.
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*/
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/*
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* Start by looking for last slash or backslash, ...
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*/
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for (slash = 0, i = 0; i < wlen; i++)
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if (wstr[i] == L'/' || wstr[i] == L'\\')
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slash = i + 1;
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/*
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* ... then look for asterisk or question mark in the file name.
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*/
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for (i = slash; i < wlen; i++)
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if (wstr[i] == L'*' || wstr[i] == L'?')
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break;
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if (i == wlen)
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return 0; /* definitely not a glob */
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saved_char = wstr[wlen];
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wstr[wlen] = L'\0';
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h = FindFirstFileW(wstr, &data);
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wstr[wlen] = saved_char;
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if (h == INVALID_HANDLE_VALUE)
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return 0; /* not a valid glob, just pass... */
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if (slash)
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udlen = WideCharToMultiByte(CP_UTF8, 0, wstr, slash,
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NULL, 0, NULL, NULL);
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else
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udlen = 0;
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do {
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int uflen;
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char *arg;
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/*
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* skip over . and ..
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*/
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if (data.cFileName[0] == L'.') {
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if ((data.cFileName[1] == L'\0') ||
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(data.cFileName[1] == L'.' && data.cFileName[2] == L'\0'))
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continue;
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}
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if (!validate_argv(newargc + 1))
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break;
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/*
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* -1 below means "scan for trailing '\0' *and* count it",
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* so that |uflen| covers even trailing '\0'.
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*/
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uflen = WideCharToMultiByte(CP_UTF8, 0, data.cFileName, -1,
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NULL, 0, NULL, NULL);
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arg = malloc(udlen + uflen);
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if (arg == NULL)
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break;
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if (udlen)
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WideCharToMultiByte(CP_UTF8, 0, wstr, slash,
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arg, udlen, NULL, NULL);
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WideCharToMultiByte(CP_UTF8, 0, data.cFileName, -1,
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arg + udlen, uflen, NULL, NULL);
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newargv[newargc++] = arg;
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} while (FindNextFileW(h, &data));
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CloseHandle(h);
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return 1;
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}
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void win32_utf8argv(int *argc, char **argv[])
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{
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const WCHAR *wcmdline;
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WCHAR *warg, *wend, *p;
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int wlen, ulen, valid = 1;
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char *arg;
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if (GetEnvironmentVariableW(L"OPENSSL_WIN32_UTF8", NULL, 0) == 0)
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return;
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newargc = 0;
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newargv = NULL;
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if (!validate_argv(newargc))
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return;
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wcmdline = GetCommandLineW();
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if (wcmdline == NULL) return;
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/*
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* make a copy of the command line, since we might have to modify it...
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*/
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wlen = (int)wcslen(wcmdline);
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p = _alloca((wlen + 1) * sizeof(WCHAR));
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memcpy(p, wcmdline, (wlen + 1) * sizeof(WCHAR));
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while (*p != L'\0') {
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int in_quote = 0;
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if (*p == L' ' || *p == L'\t') {
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p++; /* skip over whitespace */
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continue;
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}
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/*
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* Note: because we may need to fiddle with the number of backslashes,
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* the argument string is copied into itself. This is safe because
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* the number of characters will never expand.
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*/
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warg = wend = p;
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while (*p != L'\0'
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&& (in_quote || (*p != L' ' && *p != L'\t'))) {
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switch (*p) {
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case L'\\':
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/*
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* Microsoft documentation on how backslashes are treated
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* is:
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*
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* + Backslashes are interpreted literally, unless they
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* immediately precede a double quotation mark.
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* + If an even number of backslashes is followed by a double
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* quotation mark, one backslash is placed in the argv array
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* for every pair of backslashes, and the double quotation
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* mark is interpreted as a string delimiter.
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* + If an odd number of backslashes is followed by a double
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* quotation mark, one backslash is placed in the argv array
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* for every pair of backslashes, and the double quotation
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* mark is "escaped" by the remaining backslash, causing a
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* literal double quotation mark (") to be placed in argv.
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*
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* Ref: https://msdn.microsoft.com/en-us/library/17w5ykft.aspx
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*
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* Though referred page doesn't mention it, multiple qouble
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* quotes are also special. Pair of double quotes in quoted
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* string is counted as single double quote.
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*/
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{
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const WCHAR *q = p;
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size_t i;
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while (*p == L'\\')
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p++;
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if (*p == L'"') {
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for (i = (p - q) / 2; i > 0; i--)
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*wend++ = L'\\';
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/*
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* if odd amount of backslashes before the quote,
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* said quote is part of the argument, not a delimiter
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*/
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if ((p - q) % 2 == 1)
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*wend++ = *p++;
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} else {
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for (i = p - q; i > 0; i--)
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*wend++ = L'\\';
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}
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}
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break;
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case L'"':
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/*
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* Without the preceding backslash (or when preceded with an
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* even number of backslashes), the double quote is a simple
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* string delimiter and just slightly change the parsing state
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*/
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if (in_quote && p[1] == L'"')
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*wend++ = *p++;
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else
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in_quote = !in_quote;
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p++;
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break;
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default:
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/*
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* Any other non-delimiter character is just taken verbatim
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*/
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*wend++ = *p++;
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}
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}
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wlen = (int)(wend - warg);
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if (wlen == 0 || !process_glob(warg, wlen)) {
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if (!validate_argv(newargc + 1)) {
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valid = 0;
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break;
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}
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ulen = 0;
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if (wlen > 0) {
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ulen = WideCharToMultiByte(CP_UTF8, 0, warg, wlen,
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NULL, 0, NULL, NULL);
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if (ulen <= 0)
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continue;
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}
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arg = malloc(ulen + 1);
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if (arg == NULL) {
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valid = 0;
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break;
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}
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if (wlen > 0)
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WideCharToMultiByte(CP_UTF8, 0, warg, wlen,
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arg, ulen, NULL, NULL);
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arg[ulen] = '\0';
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newargv[newargc++] = arg;
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}
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}
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if (valid) {
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saved_cp = GetConsoleOutputCP();
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SetConsoleOutputCP(CP_UTF8);
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*argc = newargc;
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*argv = newargv;
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atexit(cleanup);
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} else if (newargv != NULL) {
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int i;
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for (i = 0; i < newargc; i++)
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free(newargv[i]);
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free(newargv);
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newargc = 0;
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newargv = NULL;
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}
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return;
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}
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#else
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void win32_utf8argv(int *argc, char **argv[])
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{ return; }
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#endif
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