From 948a871c7348a4cfd9caa1e797d17e503c095a63 Mon Sep 17 00:00:00 2001 From: Mounir IDRASSI Date: Fri, 24 Jul 2020 19:39:26 +0200 Subject: Windows: update libzip to latest version 1.7.3 (close issue #656) --- src/Common/libzip/zip_pkware.c | 112 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 src/Common/libzip/zip_pkware.c (limited to 'src/Common/libzip/zip_pkware.c') diff --git a/src/Common/libzip/zip_pkware.c b/src/Common/libzip/zip_pkware.c new file mode 100644 index 00000000..eb12b1e9 --- /dev/null +++ b/src/Common/libzip/zip_pkware.c @@ -0,0 +1,112 @@ +/* + zip_pkware.c -- Traditional PKWARE de/encryption backend routines + Copyright (C) 2009-2020 Dieter Baron and Thomas Klausner + + This file is part of libzip, a library to manipulate ZIP archives. + The authors can be contacted 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 +#include + +#include "zipint.h" + +#define PKWARE_KEY0 305419896 +#define PKWARE_KEY1 591751049 +#define PKWARE_KEY2 878082192 + + +static void +update_keys(zip_pkware_keys_t *keys, zip_uint8_t b) { + keys->key[0] = (zip_uint32_t)crc32(keys->key[0] ^ 0xffffffffUL, &b, 1) ^ 0xffffffffUL; + keys->key[1] = (keys->key[1] + (keys->key[0] & 0xff)) * 134775813 + 1; + b = (zip_uint8_t)(keys->key[1] >> 24); + keys->key[2] = (zip_uint32_t)crc32(keys->key[2] ^ 0xffffffffUL, &b, 1) ^ 0xffffffffUL; +} + + +static zip_uint8_t +crypt_byte(zip_pkware_keys_t *keys) { + zip_uint16_t tmp; + tmp = (zip_uint16_t)(keys->key[2] | 2); + tmp = (zip_uint16_t)(((zip_uint32_t)tmp * (tmp ^ 1)) >> 8); + return (zip_uint8_t)tmp; +} + + +void +_zip_pkware_keys_reset(zip_pkware_keys_t *keys) { + keys->key[0] = PKWARE_KEY0; + keys->key[1] = PKWARE_KEY1; + keys->key[2] = PKWARE_KEY2; +} + + +void +_zip_pkware_encrypt(zip_pkware_keys_t *keys, zip_uint8_t *out, const zip_uint8_t *in, zip_uint64_t len) { + zip_uint64_t i; + zip_uint8_t b; + zip_uint8_t tmp; + + for (i = 0; i < len; i++) { + b = in[i]; + + if (out != NULL) { + tmp = crypt_byte(keys); + update_keys(keys, b); + b ^= tmp; + out[i] = b; + } + else { + /* during initialization, we're only interested in key updates */ + update_keys(keys, b); + } + } +} + + +void +_zip_pkware_decrypt(zip_pkware_keys_t *keys, zip_uint8_t *out, const zip_uint8_t *in, zip_uint64_t len) { + zip_uint64_t i; + zip_uint8_t b; + zip_uint8_t tmp; + + for (i = 0; i < len; i++) { + b = in[i]; + + /* during initialization, we're only interested in key updates */ + if (out != NULL) { + tmp = crypt_byte(keys); + b ^= tmp; + out[i] = b; + } + + update_keys(keys, b); + } +} -- cgit v1.2.3