diff options
Diffstat (limited to 'crypto/o_fopen.c')
-rw-r--r-- | crypto/o_fopen.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/crypto/o_fopen.c b/crypto/o_fopen.c new file mode 100644 index 0000000000..0bdb53fe53 --- /dev/null +++ b/crypto/o_fopen.c @@ -0,0 +1,103 @@ +/* + * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include "internal/cryptlib.h" + +#if !defined(OPENSSL_NO_STDIO) + +# include <stdio.h> + +FILE *openssl_fopen(const char *filename, const char *mode) +{ + FILE *file = NULL; +# if defined(_WIN32) && defined(CP_UTF8) + int sz, len_0 = (int)strlen(filename) + 1; + DWORD flags; + + /* + * Basically there are three cases to cover: a) filename is + * pure ASCII string; b) actual UTF-8 encoded string and + * c) locale-ized string, i.e. one containing 8-bit + * characters that are meaningful in current system locale. + * If filename is pure ASCII or real UTF-8 encoded string, + * MultiByteToWideChar succeeds and _wfopen works. If + * filename is locale-ized string, chances are that + * MultiByteToWideChar fails reporting + * ERROR_NO_UNICODE_TRANSLATION, in which case we fall + * back to fopen... + */ + if ((sz = MultiByteToWideChar(CP_UTF8, (flags = MB_ERR_INVALID_CHARS), + filename, len_0, NULL, 0)) > 0 || + (GetLastError() == ERROR_INVALID_FLAGS && + (sz = MultiByteToWideChar(CP_UTF8, (flags = 0), + filename, len_0, NULL, 0)) > 0) + ) { + WCHAR wmode[8]; + WCHAR *wfilename = _alloca(sz * sizeof(WCHAR)); + + if (MultiByteToWideChar(CP_UTF8, flags, + filename, len_0, wfilename, sz) && + MultiByteToWideChar(CP_UTF8, 0, mode, strlen(mode) + 1, + wmode, OSSL_NELEM(wmode)) && + (file = _wfopen(wfilename, wmode)) == NULL && + (errno == ENOENT || errno == EBADF) + ) { + /* + * UTF-8 decode succeeded, but no file, filename + * could still have been locale-ized... + */ + file = fopen(filename, mode); + } + } else if (GetLastError() == ERROR_NO_UNICODE_TRANSLATION) { + file = fopen(filename, mode); + } +# elif defined(__DJGPP__) + { + char *newname = NULL; + + if (!HAS_LFN_SUPPORT(filename)) { + char *iterator; + char lastchar; + + newname = OPENSSL_malloc(strlen(filename) + 1); + if (newname == NULL) + return NULL; + + for(iterator = newname, lastchar = '\0'; + *filename; filename++, iterator++) { + if (lastchar == '/' && filename[0] == '.' + && filename[1] != '.' && filename[1] != '/') { + /* Leading dots are not permitted in plain DOS. */ + *iterator = '_'; + } else { + *iterator = *filename; + } + lastchar = *filename; + } + *iterator = '\0'; + filename = newname; + } + file = fopen(filename, mode); + + OPENSSL_free(newname); + } +# else + file = fopen(filename, mode); +# endif + return file; +} + +#else + +void *openssl_fopen(const char *filename, const char *mode) +{ + return NULL; +} + +#endif |