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| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2016-09-15 10:04:05 +0200 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2016-10-17 18:40:06 +0200 |
| commit | 4dacedd9ccdbdc6a6e62d9fb86e9b2ea903a3629 (patch) | |
| tree | 567350f56dd4ee4dd291d13199610d38dac51879 /src/Common/libzip/zip_filerange_crc.c | |
| parent | 66891638d51351fae5cd82a88c1a64661a025de0 (diff) | |
| download | VeraCrypt-4dacedd9ccdbdc6a6e62d9fb86e9b2ea903a3629.tar.gz VeraCrypt-4dacedd9ccdbdc6a6e62d9fb86e9b2ea903a3629.zip | |
Windows: Replace XZip/XUnzip library with zlib and libzip and include the sources of these library into VeraCrypt source tree.
Diffstat (limited to 'src/Common/libzip/zip_filerange_crc.c')
| -rw-r--r-- | src/Common/libzip/zip_filerange_crc.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/Common/libzip/zip_filerange_crc.c b/src/Common/libzip/zip_filerange_crc.c new file mode 100644 index 00000000..f2a27fab --- /dev/null +++ b/src/Common/libzip/zip_filerange_crc.c @@ -0,0 +1,76 @@ +/* + zip_filerange_crc.c -- compute CRC32 for a range of a file + Copyright (C) 2008-2015 Dieter Baron and Thomas Klausner + + This file is part of libzip, a library to manipulate ZIP archives. + The authors can be contacted at <libzip@nih.at> + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + 3. The names of the authors may not be used to endorse or promote + products derived from this software without specific prior + written permission. + + THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS + OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + + +#include <stdio.h> + +#include "zipint.h" + + + +int +_zip_filerange_crc(zip_source_t *src, zip_uint64_t start, zip_uint64_t len, uLong *crcp, zip_error_t *error) +{ + Bytef buf[BUFSIZE]; + zip_int64_t n; + + *crcp = crc32(0L, Z_NULL, 0); + + if (start > ZIP_INT64_MAX) { + zip_error_set(error, ZIP_ER_SEEK, EFBIG); + return -1; + } + + if (zip_source_seek(src, (zip_int64_t)start, SEEK_SET) != 0) { + _zip_error_set_from_source(error, src); + return -1; + } + + while (len > 0) { + n = (zip_int64_t)(len > BUFSIZE ? BUFSIZE : len); + if ((n = zip_source_read(src, buf, (zip_uint64_t)n)) < 0) { + _zip_error_set_from_source(error, src); + return -1; + } + if (n == 0) { + zip_error_set(error, ZIP_ER_EOF, 0); + return -1; + } + + *crcp = crc32(*crcp, buf, (uInt)n); + + len -= (zip_uint64_t)n; + } + + return 0; +} |