diff options
Diffstat (limited to 'crypto/scrypt/lib/crypto/crypto_scrypt-neon.c')
| -rw-r--r-- | crypto/scrypt/lib/crypto/crypto_scrypt-neon.c | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/crypto/scrypt/lib/crypto/crypto_scrypt-neon.c b/crypto/scrypt/lib/crypto/crypto_scrypt-neon.c new file mode 100644 index 000000000..a3bf052b4 --- /dev/null +++ b/crypto/scrypt/lib/crypto/crypto_scrypt-neon.c @@ -0,0 +1,305 @@ +/*- + * 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 <machine/cpu-features.h> +#include <arm_neon.h> + +#include <errno.h> +#include <stdint.h> +#include <limits.h> +#include <stdlib.h> +#include <string.h> + +#ifdef USE_OPENSSL_PBKDF2 +#include <openssl/evp.h> +#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); +} |