-/*-
- * Copyright 2009 Colin Percival, 2011 ArtForz, 2011 pooler, 2013 Balthazar
- * 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 AUTHOR 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 AUTHOR 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.
- *
- * This file was originally written by Colin Percival as part of the Tarsnap
- * online backup system.
- */
-
#include <stdlib.h>
#include <stdint.h>
#define SCRYPT_BUFFER_SIZE (131072 + 63)
-#if defined (OPTIMIZED_SALSA) && ( defined (__x86_64__) || defined (__i386__) || defined(__arm__) )
extern "C" void scrypt_core(unsigned int *X, unsigned int *V);
-#else
-// Generic scrypt_core implementation
-
-static inline void xor_salsa8(unsigned int B[16], const unsigned int Bx[16])
-{
- unsigned int x00,x01,x02,x03,x04,x05,x06,x07,x08,x09,x10,x11,x12,x13,x14,x15;
- int i;
-
- x00 = (B[0] ^= Bx[0]);
- x01 = (B[1] ^= Bx[1]);
- x02 = (B[2] ^= Bx[2]);
- x03 = (B[3] ^= Bx[3]);
- x04 = (B[4] ^= Bx[4]);
- x05 = (B[5] ^= Bx[5]);
- x06 = (B[6] ^= Bx[6]);
- x07 = (B[7] ^= Bx[7]);
- x08 = (B[8] ^= Bx[8]);
- x09 = (B[9] ^= Bx[9]);
- x10 = (B[10] ^= Bx[10]);
- x11 = (B[11] ^= Bx[11]);
- x12 = (B[12] ^= Bx[12]);
- x13 = (B[13] ^= Bx[13]);
- x14 = (B[14] ^= Bx[14]);
- x15 = (B[15] ^= Bx[15]);
- for (i = 0; i < 8; i += 2) {
-#define R(a, b) (((a) << (b)) | ((a) >> (32 - (b))))
- /* Operate on columns. */
- x04 ^= R(x00+x12, 7); x09 ^= R(x05+x01, 7);
- x14 ^= R(x10+x06, 7); x03 ^= R(x15+x11, 7);
-
- x08 ^= R(x04+x00, 9); x13 ^= R(x09+x05, 9);
- x02 ^= R(x14+x10, 9); x07 ^= R(x03+x15, 9);
-
- x12 ^= R(x08+x04,13); x01 ^= R(x13+x09,13);
- x06 ^= R(x02+x14,13); x11 ^= R(x07+x03,13);
-
- x00 ^= R(x12+x08,18); x05 ^= R(x01+x13,18);
- x10 ^= R(x06+x02,18); x15 ^= R(x11+x07,18);
-
- /* Operate on rows. */
- x01 ^= R(x00+x03, 7); x06 ^= R(x05+x04, 7);
- x11 ^= R(x10+x09, 7); x12 ^= R(x15+x14, 7);
-
- x02 ^= R(x01+x00, 9); x07 ^= R(x06+x05, 9);
- x08 ^= R(x11+x10, 9); x13 ^= R(x12+x15, 9);
-
- x03 ^= R(x02+x01,13); x04 ^= R(x07+x06,13);
- x09 ^= R(x08+x11,13); x14 ^= R(x13+x12,13);
-
- x00 ^= R(x03+x02,18); x05 ^= R(x04+x07,18);
- x10 ^= R(x09+x08,18); x15 ^= R(x14+x13,18);
-#undef R
- }
- B[0] += x00;
- B[1] += x01;
- B[2] += x02;
- B[3] += x03;
- B[4] += x04;
- B[5] += x05;
- B[6] += x06;
- B[7] += x07;
- B[8] += x08;
- B[9] += x09;
- B[10] += x10;
- B[11] += x11;
- B[12] += x12;
- B[13] += x13;
- B[14] += x14;
- B[15] += x15;
-}
-
-static inline void scrypt_core(unsigned int *X, unsigned int *V)
-{
- unsigned int i, j, k;
-
- for (i = 0; i < 1024; i++) {
- memcpy(&V[i * 32], X, 128);
- xor_salsa8(&X[0], &X[16]);
- xor_salsa8(&X[16], &X[0]);
- }
- for (i = 0; i < 1024; i++) {
- j = 32 * (X[16] & 1023);
- for (k = 0; k < 32; k++)
- X[k] ^= V[j + k];
- xor_salsa8(&X[0], &X[16]);
- xor_salsa8(&X[16], &X[0]);
- }
-}
-
-#endif
/* cpu and memory intensive function to transform a 80 byte buffer into a 32 byte output
scratchpad size needs to be at least 63 + (128 * r * p) + (256 * r + 64) + (128 * r * N) bytes
git://git.novaco.in / novacoin.git / blobdiff