/* =================================================================== * * Copyright (c) 2015, Legrandin * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "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 * COPYRIGHT HOLDER OR CONTRIBUTORS 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 "pycrypto_common.h" FAKE_INIT(scrypt) static inline int little_endian(void) { int test = 1; return *((uint8_t*)&test) == 1; } static inline uint32_t load_le_uint32(const uint8_t *in) { union { uint32_t w; uint8_t b[4]; } x, y; memcpy(&x, in, 4); y = x; if (!little_endian()) { y.b[0] = x.b[3]; y.b[1] = x.b[2]; y.b[2] = x.b[1]; y.b[3] = x.b[0]; } return y.w; } /** Return 1 if the pointer is aligned to the 64-bit boundary **/ static inline int aligned64(const uint8_t *p) { if ((uintptr_t)p % 8 == 0) return 1; else return 0; } static inline void strxor_inplace(uint8_t *in_out, const uint8_t *in, size_t data_len) { size_t i; if (!aligned64(in_out) || !aligned64(in) || (data_len%8)!=0) { for (i=0; i