diff --git a/lib/crypto/crypto_scrypt-neon-salsa208.h b/lib/crypto/crypto_scrypt-neon-salsa208.h new file mode 100644 index 0000000..a3b1019 --- /dev/null +++ b/lib/crypto/crypto_scrypt-neon-salsa208.h @@ -0,0 +1,120 @@ +/* + * version 20110505 + * D. J. Bernstein + * Public domain. + * + * Based on crypto_core/salsa208/armneon/core.c from SUPERCOP 20130419 + */ + +#define ROUNDS 8 +static void +salsa20_8_intrinsic(void * input) +{ + int i; + + const uint32x4_t abab = {-1,0,-1,0}; + + /* + * This is modified since we only have one argument. Usually you'd rearrange + * the constant, key, and input bytes, but we just have one linear array to + * rearrange which is a bit easier. + */ + + /* + * Change the input to be diagonals as if it's a 4x4 matrix of 32-bit values. + */ + uint32x4_t x0x5x10x15; + uint32x4_t x12x1x6x11; + uint32x4_t x8x13x2x7; + uint32x4_t x4x9x14x3; + + uint32x4_t x0x1x10x11; + uint32x4_t x12x13x6x7; + uint32x4_t x8x9x2x3; + uint32x4_t x4x5x14x15; + + uint32x4_t x0x1x2x3; + uint32x4_t x4x5x6x7; + uint32x4_t x8x9x10x11; + uint32x4_t x12x13x14x15; + + x0x1x2x3 = vld1q_u8((uint8_t *) input); + x4x5x6x7 = vld1q_u8(16 + (uint8_t *) input); + x8x9x10x11 = vld1q_u8(32 + (uint8_t *) input); + x12x13x14x15 = vld1q_u8(48 + (uint8_t *) input); + + x0x1x10x11 = vcombine_u32(vget_low_u32(x0x1x2x3), vget_high_u32(x8x9x10x11)); + x4x5x14x15 = vcombine_u32(vget_low_u32(x4x5x6x7), vget_high_u32(x12x13x14x15)); + x8x9x2x3 = vcombine_u32(vget_low_u32(x8x9x10x11), vget_high_u32(x0x1x2x3)); + x12x13x6x7 = vcombine_u32(vget_low_u32(x12x13x14x15), vget_high_u32(x4x5x6x7)); + + x0x5x10x15 = vbslq_u32(abab,x0x1x10x11,x4x5x14x15); + x8x13x2x7 = vbslq_u32(abab,x8x9x2x3,x12x13x6x7); + x4x9x14x3 = vbslq_u32(abab,x4x5x14x15,x8x9x2x3); + x12x1x6x11 = vbslq_u32(abab,x12x13x6x7,x0x1x10x11); + + uint32x4_t start0 = x0x5x10x15; + uint32x4_t start1 = x12x1x6x11; + uint32x4_t start3 = x4x9x14x3; + uint32x4_t start2 = x8x13x2x7; + + /* From here on this should be the same as the SUPERCOP version. */ + + uint32x4_t diag0 = start0; + uint32x4_t diag1 = start1; + uint32x4_t diag2 = start2; + uint32x4_t diag3 = start3; + + uint32x4_t a0; + uint32x4_t a1; + uint32x4_t a2; + uint32x4_t a3; + + for (i = ROUNDS;i > 0;i -= 2) { + a0 = diag1 + diag0; + diag3 ^= vsriq_n_u32(vshlq_n_u32(a0,7),a0,25); + a1 = diag0 + diag3; + diag2 ^= vsriq_n_u32(vshlq_n_u32(a1,9),a1,23); + a2 = diag3 + diag2; + diag1 ^= vsriq_n_u32(vshlq_n_u32(a2,13),a2,19); + a3 = diag2 + diag1; + diag0 ^= vsriq_n_u32(vshlq_n_u32(a3,18),a3,14); + + diag3 = vextq_u32(diag3,diag3,3); + diag2 = vextq_u32(diag2,diag2,2); + diag1 = vextq_u32(diag1,diag1,1); + + a0 = diag3 + diag0; + diag1 ^= vsriq_n_u32(vshlq_n_u32(a0,7),a0,25); + a1 = diag0 + diag1; + diag2 ^= vsriq_n_u32(vshlq_n_u32(a1,9),a1,23); + a2 = diag1 + diag2; + diag3 ^= vsriq_n_u32(vshlq_n_u32(a2,13),a2,19); + a3 = diag2 + diag3; + diag0 ^= vsriq_n_u32(vshlq_n_u32(a3,18),a3,14); + + diag1 = vextq_u32(diag1,diag1,3); + diag2 = vextq_u32(diag2,diag2,2); + diag3 = vextq_u32(diag3,diag3,1); + } + + x0x5x10x15 = diag0 + start0; + x12x1x6x11 = diag1 + start1; + x8x13x2x7 = diag2 + start2; + x4x9x14x3 = diag3 + start3; + + x0x1x10x11 = vbslq_u32(abab,x0x5x10x15,x12x1x6x11); + x12x13x6x7 = vbslq_u32(abab,x12x1x6x11,x8x13x2x7); + x8x9x2x3 = vbslq_u32(abab,x8x13x2x7,x4x9x14x3); + x4x5x14x15 = vbslq_u32(abab,x4x9x14x3,x0x5x10x15); + + x0x1x2x3 = vcombine_u32(vget_low_u32(x0x1x10x11),vget_high_u32(x8x9x2x3)); + x4x5x6x7 = vcombine_u32(vget_low_u32(x4x5x14x15),vget_high_u32(x12x13x6x7)); + x8x9x10x11 = vcombine_u32(vget_low_u32(x8x9x2x3),vget_high_u32(x0x1x10x11)); + x12x13x14x15 = vcombine_u32(vget_low_u32(x12x13x6x7),vget_high_u32(x4x5x14x15)); + + vst1q_u8((uint8_t *) input,(uint8x16_t) x0x1x2x3); + vst1q_u8(16 + (uint8_t *) input,(uint8x16_t) x4x5x6x7); + vst1q_u8(32 + (uint8_t *) input,(uint8x16_t) x8x9x10x11); + vst1q_u8(48 + (uint8_t *) input,(uint8x16_t) x12x13x14x15); +} diff --git a/lib/crypto/crypto_scrypt-neon.c b/lib/crypto/crypto_scrypt-neon.c new file mode 100644 index 0000000..a3bf052 --- /dev/null +++ b/lib/crypto/crypto_scrypt-neon.c @@ -0,0 +1,304 @@ +/*- + * Copyright 2009 Colin Percival + * 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 "scrypt_platform.h" + +#include + +#include +#include +#include +#include +#include + +#ifdef USE_OPENSSL_PBKDF2 +#include +#else +#include "sha256.h" +#endif +#include "sysendian.h" + +#include "crypto_scrypt.h" + +#include "crypto_scrypt-neon-salsa208.h" + +static void blkcpy(void *, void *, size_t); +static void blkxor(void *, void *, size_t); +void crypto_core_salsa208_armneon2(void *); +static void blockmix_salsa8(uint8x16_t *, uint8x16_t *, uint8x16_t *, size_t); +static uint64_t integerify(void *, size_t); +static void smix(uint8_t *, size_t, uint64_t, void *, void *); + +static void +blkcpy(void * dest, void * src, size_t len) +{ + uint8x16_t * D = dest; + uint8x16_t * S = src; + size_t L = len / 16; + size_t i; + + for (i = 0; i < L; i++) + D[i] = S[i]; +} + +static void +blkxor(void * dest, void * src, size_t len) +{ + uint8x16_t * D = dest; + uint8x16_t * S = src; + size_t L = len / 16; + size_t i; + + for (i = 0; i < L; i++) + D[i] = veorq_u8(D[i], S[i]); +} + +/** + * blockmix_salsa8(B, Y, r): + * Compute B = BlockMix_{salsa20/8, r}(B). The input B must be 128r bytes in + * length; the temporary space Y must also be the same size. + */ +static void +blockmix_salsa8(uint8x16_t * Bin, uint8x16_t * Bout, uint8x16_t * X, size_t r) +{ + size_t i; + + /* 1: X <-- B_{2r - 1} */ + blkcpy(X, &Bin[8 * r - 4], 64); + + /* 2: for i = 0 to 2r - 1 do */ + for (i = 0; i < r; i++) { + /* 3: X <-- H(X \xor B_i) */ + blkxor(X, &Bin[i * 8], 64); + salsa20_8_intrinsic((void *) X); + + /* 4: Y_i <-- X */ + /* 6: B' <-- (Y_0, Y_2 ... Y_{2r-2}, Y_1, Y_3 ... Y_{2r-1}) */ + blkcpy(&Bout[i * 4], X, 64); + + /* 3: X <-- H(X \xor B_i) */ + blkxor(X, &Bin[i * 8 + 4], 64); + salsa20_8_intrinsic((void *) X); + + /* 4: Y_i <-- X */ + /* 6: B' <-- (Y_0, Y_2 ... Y_{2r-2}, Y_1, Y_3 ... Y_{2r-1}) */ + blkcpy(&Bout[(r + i) * 4], X, 64); + } +} + +/** + * integerify(B, r): + * Return the result of parsing B_{2r-1} as a little-endian integer. + */ +static uint64_t +integerify(void * B, size_t r) +{ + uint8_t * X = (void*)((uintptr_t)(B) + (2 * r - 1) * 64); + + return (le64dec(X)); +} + +/** + * smix(B, r, N, V, XY): + * Compute B = SMix_r(B, N). The input B must be 128r bytes in length; the + * temporary storage V must be 128rN bytes in length; the temporary storage + * XY must be 256r bytes in length. The value N must be a power of 2. + */ +static void +smix(uint8_t * B, size_t r, uint64_t N, void * V, void * XY) +{ + uint8x16_t * X = XY; + uint8x16_t * Y = (void *)((uintptr_t)(XY) + 128 * r); + uint8x16_t * Z = (void *)((uintptr_t)(XY) + 256 * r); + uint32_t * X32 = (void *)X; + uint64_t i, j; + size_t k; + + /* 1: X <-- B */ + blkcpy(X, B, 128 * r); + + /* 2: for i = 0 to N - 1 do */ + for (i = 0; i < N; i += 2) { + /* 3: V_i <-- X */ + blkcpy((void *)((uintptr_t)(V) + i * 128 * r), X, 128 * r); + + /* 4: X <-- H(X) */ + blockmix_salsa8(X, Y, Z, r); + + /* 3: V_i <-- X */ + blkcpy((void *)((uintptr_t)(V) + (i + 1) * 128 * r), + Y, 128 * r); + + /* 4: X <-- H(X) */ + blockmix_salsa8(Y, X, Z, r); + } + + /* 6: for i = 0 to N - 1 do */ + for (i = 0; i < N; i += 2) { + /* 7: j <-- Integerify(X) mod N */ + j = integerify(X, r) & (N - 1); + + /* 8: X <-- H(X \xor V_j) */ + blkxor(X, (void *)((uintptr_t)(V) + j * 128 * r), 128 * r); + blockmix_salsa8(X, Y, Z, r); + + /* 7: j <-- Integerify(X) mod N */ + j = integerify(Y, r) & (N - 1); + + /* 8: X <-- H(X \xor V_j) */ + blkxor(Y, (void *)((uintptr_t)(V) + j * 128 * r), 128 * r); + blockmix_salsa8(Y, X, Z, r); + } + + /* 10: B' <-- X */ + blkcpy(B, X, 128 * r); +} + +/** + * crypto_scrypt(passwd, passwdlen, salt, saltlen, N, r, p, buf, buflen): + * Compute scrypt(passwd[0 .. passwdlen - 1], salt[0 .. saltlen - 1], N, r, + * p, buflen) and write the result into buf. The parameters r, p, and buflen + * must satisfy r * p < 2^30 and buflen <= (2^32 - 1) * 32. The parameter N + * must be a power of 2. + * + * Return 0 on success; or -1 on error. + */ +int +crypto_scrypt(const uint8_t * passwd, size_t passwdlen, + const uint8_t * salt, size_t saltlen, uint64_t N, uint32_t r, uint32_t p, + uint8_t * buf, size_t buflen) +{ + void * B0, * V0, * XY0; + uint8_t * B; + uint32_t * V; + uint32_t * XY; + uint32_t i; + + /* Sanity-check parameters. */ +#if SIZE_MAX > UINT32_MAX + if (buflen > (((uint64_t)(1) << 32) - 1) * 32) { + errno = EFBIG; + goto err0; + } +#endif + if ((uint64_t)(r) * (uint64_t)(p) >= (1 << 30)) { + errno = EFBIG; + goto err0; + } + if (((N & (N - 1)) != 0) || (N == 0)) { + errno = EINVAL; + goto err0; + } + if ((r > SIZE_MAX / 128 / p) || +#if SIZE_MAX / 256 <= UINT32_MAX + (r > SIZE_MAX / 256) || +#endif + (N > SIZE_MAX / 128 / r)) { + errno = ENOMEM; + goto err0; + } + + /* Allocate memory. */ +#ifdef HAVE_POSIX_MEMALIGN + if ((errno = posix_memalign(&B0, 64, 128 * r * p)) != 0) + goto err0; + B = (uint8_t *)(B0); + if ((errno = posix_memalign(&XY0, 64, 256 * r + 64)) != 0) + goto err1; + XY = (uint32_t *)(XY0); +#ifndef MAP_ANON + if ((errno = posix_memalign(&V0, 64, 128 * r * N)) != 0) + goto err2; + V = (uint32_t *)(V0); +#endif +#else + if ((B0 = malloc(128 * r * p + 63)) == NULL) + goto err0; + B = (uint8_t *)(((uintptr_t)(B0) + 63) & ~ (uintptr_t)(63)); + if ((XY0 = malloc(256 * r + 64 + 63)) == NULL) + goto err1; + XY = (uint32_t *)(((uintptr_t)(XY0) + 63) & ~ (uintptr_t)(63)); +#ifndef MAP_ANON + if ((V0 = malloc(128 * r * N + 63)) == NULL) + goto err2; + V = (uint32_t *)(((uintptr_t)(V0) + 63) & ~ (uintptr_t)(63)); +#endif +#endif +#ifdef MAP_ANON + if ((V0 = mmap(NULL, 128 * r * N, PROT_READ | PROT_WRITE, +#ifdef MAP_NOCORE + MAP_ANON | MAP_PRIVATE | MAP_NOCORE, +#else + MAP_ANON | MAP_PRIVATE, +#endif + -1, 0)) == MAP_FAILED) + goto err2; + V = (uint32_t *)(V0); +#endif + + /* 1: (B_0 ... B_{p-1}) <-- PBKDF2(P, S, 1, p * MFLen) */ +#ifdef USE_OPENSSL_PBKDF2 + PKCS5_PBKDF2_HMAC((const char *)passwd, passwdlen, salt, saltlen, 1, EVP_sha256(), p * 128 * r, B); +#else + PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, 1, B, p * 128 * r); +#endif + + /* 2: for i = 0 to p - 1 do */ + for (i = 0; i < p; i++) { + /* 3: B_i <-- MF(B_i, N) */ + smix(&B[i * 128 * r], r, N, V, XY); + } + + /* 5: DK <-- PBKDF2(P, B, 1, dkLen) */ +#ifdef USE_OPENSSL_PBKDF2 + PKCS5_PBKDF2_HMAC((const char *)passwd, passwdlen, B, p * 128 * r, 1, EVP_sha256(), buflen, buf); +#else + PBKDF2_SHA256(passwd, passwdlen, B, p * 128 * r, 1, buf, buflen); +#endif + + /* Free memory. */ +#ifdef MAP_ANON + if (munmap(V0, 128 * r * N)) + goto err2; +#else + free(V0); +#endif + free(XY0); + free(B0); + + /* Success! */ + return (0); + +err2: + free(XY0); +err1: + free(B0); +err0: + /* Failure! */ + return (-1); +}