[v5,22/34] crypto: BLAKE2s - generic C library implementation and selftest

Message ID	20191108122240.28479-23-ardb@kernel.org
State	New
Headers	show Delivered-To: patch@linaro.org Received-SPF: pass (google.com: best guess record for domain of linux-crypto-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; From: Ard Biesheuvel <ardb@kernel.org> To: linux-crypto@vger.kernel.org Cc: Ard Biesheuvel <ardb@kernel.org>, Herbert Xu <herbert@gondor.apana.org.au>, David Miller <davem@davemloft.net>, "Jason A . Donenfeld" <Jason@zx2c4.com>, Samuel Neves <sneves@dei.uc.pt>, Arnd Bergmann <arnd@arndb.de>, Eric Biggers <ebiggers@google.com>, Andy Lutomirski <luto@kernel.org>, Martin Willi <martin@strongswan.org>, Rene van Dorst <opensource@vdorst.com>, David Sterba <dsterba@suse.com> Subject: [PATCH v5 22/34] crypto: BLAKE2s - generic C library implementation and selftest Date: Fri, 8 Nov 2019 13:22:28 +0100 Message-Id: <20191108122240.28479-23-ardb@kernel.org> In-Reply-To: <20191108122240.28479-1-ardb@kernel.org> References: <20191108122240.28479-1-ardb@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk
Series	None \| expand [v5,10/34] crypto: mips/chacha - import 32r2 ChaCha code from Zinc [v5,22/34] crypto: BLAKE2s - generic C library implementation and selftest [v5,25/34] crypto: BLAKE2s - x86_64 SIMD implementation [v5,26/34] crypto: Curve25519 - generic C library implementations [v5,30/34] crypto: Curve25519 - x86_64 library and KPP implementations [v5,31/34] crypto: arm - import Bernstein and Schwabe's Curve25519 ARM implementation [v5,32/34] crypto: arm/Curve25519 - wire up NEON implementation

diff --git a/include/crypto/blake2s.h b/include/crypto/blake2s.h new file mode 100644 index 000000000000..b471deac28ff --- /dev/null +++ b/include/crypto/blake2s.h @@ -0,0 +1,106 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* + * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +#ifndef BLAKE2S_H +#define BLAKE2S_H + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/string.h> + +#include <asm/bug.h> + +enum blake2s_lengths { + BLAKE2S_BLOCK_SIZE = 64, + BLAKE2S_HASH_SIZE = 32, + BLAKE2S_KEY_SIZE = 32, + + BLAKE2S_128_HASH_SIZE = 16, + BLAKE2S_160_HASH_SIZE = 20, + BLAKE2S_224_HASH_SIZE = 28, + BLAKE2S_256_HASH_SIZE = 32, +}; + +struct blake2s_state { + u32 h[8]; + u32 t[2]; + u32 f[2]; + u8 buf[BLAKE2S_BLOCK_SIZE]; + unsigned int buflen; + unsigned int outlen; +}; + +enum blake2s_iv { + BLAKE2S_IV0 = 0x6A09E667UL, + BLAKE2S_IV1 = 0xBB67AE85UL, + BLAKE2S_IV2 = 0x3C6EF372UL, + BLAKE2S_IV3 = 0xA54FF53AUL, + BLAKE2S_IV4 = 0x510E527FUL, + BLAKE2S_IV5 = 0x9B05688CUL, + BLAKE2S_IV6 = 0x1F83D9ABUL, + BLAKE2S_IV7 = 0x5BE0CD19UL, +}; + +void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen); +void blake2s_final(struct blake2s_state *state, u8 *out); + +static inline void blake2s_init_param(struct blake2s_state *state, + const u32 param) +{ + *state = (struct blake2s_state){{ + BLAKE2S_IV0 ^ param, + BLAKE2S_IV1, + BLAKE2S_IV2, + BLAKE2S_IV3, + BLAKE2S_IV4, + BLAKE2S_IV5, + BLAKE2S_IV6, + BLAKE2S_IV7, + }}; +} + +static inline void blake2s_init(struct blake2s_state *state, + const size_t outlen) +{ + blake2s_init_param(state, 0x01010000 | outlen); + state->outlen = outlen; +} + +static inline void blake2s_init_key(struct blake2s_state *state, + const size_t outlen, const void *key, + const size_t keylen) +{ + WARN_ON(IS_ENABLED(DEBUG) && (!outlen || outlen > BLAKE2S_HASH_SIZE || + !key || !keylen || keylen > BLAKE2S_KEY_SIZE)); + + blake2s_init_param(state, 0x01010000 | keylen << 8 | outlen); + memcpy(state->buf, key, keylen); + state->buflen = BLAKE2S_BLOCK_SIZE; + state->outlen = outlen; +} + +static inline void blake2s(u8 *out, const u8 *in, const u8 *key, + const size_t outlen, const size_t inlen, + const size_t keylen) +{ + struct blake2s_state state; + + WARN_ON(IS_ENABLED(DEBUG) && ((!in && inlen > 0) || !out || !outlen || + outlen > BLAKE2S_HASH_SIZE || keylen > BLAKE2S_KEY_SIZE || + (!key && keylen))); + + if (keylen) + blake2s_init_key(&state, outlen, key, keylen); + else + blake2s_init(&state, outlen); + + blake2s_update(&state, in, inlen); + blake2s_final(&state, out); +} + +void blake2s256_hmac(u8 *out, const u8 *in, const u8 *key, const size_t inlen, + const size_t keylen); + +#endif /* BLAKE2S_H */ diff --git a/include/crypto/internal/blake2s.h b/include/crypto/internal/blake2s.h new file mode 100644 index 000000000000..941693effc7d --- /dev/null +++ b/include/crypto/internal/blake2s.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ + +#ifndef BLAKE2S_INTERNAL_H +#define BLAKE2S_INTERNAL_H + +#include <crypto/blake2s.h> + +void blake2s_compress_generic(struct blake2s_state *state,const u8 *block, + size_t nblocks, const u32 inc); + +void blake2s_compress_arch(struct blake2s_state *state,const u8 *block, + size_t nblocks, const u32 inc); + +static inline void blake2s_set_lastblock(struct blake2s_state *state) +{ + state->f[0] = -1; +} + +#endif /* BLAKE2S_INTERNAL_H */ diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig index d15ec5382986..7ad98b624e55 100644 --- a/lib/crypto/Kconfig +++ b/lib/crypto/Kconfig @@ -8,6 +8,31 @@ config CRYPTO_LIB_AES config CRYPTO_LIB_ARC4 tristate +config CRYPTO_ARCH_HAVE_LIB_BLAKE2S + tristate + help + Declares whether the architecture provides an arch-specific + accelerated implementation of the Blake2s library interface, + either builtin or as a module. + +config CRYPTO_LIB_BLAKE2S_GENERIC + tristate + help + This symbol can be depended upon by arch implementations of the + Blake2s library interface that require the generic code as a + fallback, e.g., for SIMD implementations. If no arch specific + implementation is enabled, this implementation serves the users + of CRYPTO_LIB_BLAKE2S. + +config CRYPTO_LIB_BLAKE2S + tristate "BLAKE2s hash function library" + depends on CRYPTO_ARCH_HAVE_LIB_BLAKE2S || !CRYPTO_ARCH_HAVE_LIB_BLAKE2S + select CRYPTO_LIB_BLAKE2S_GENERIC if CRYPTO_ARCH_HAVE_LIB_BLAKE2S=n + help + Enable the Blake2s library interface. This interface may be fulfilled + by either the generic implementation or an arch-specific one, if one + is available and enabled. + config CRYPTO_ARCH_HAVE_LIB_CHACHA tristate help diff --git a/lib/crypto/Makefile b/lib/crypto/Makefile index b58ab6843a9d..8ca66b5f9807 100644 --- a/lib/crypto/Makefile +++ b/lib/crypto/Makefile @@ -10,6 +10,12 @@ libaes-y := aes.o obj-$(CONFIG_CRYPTO_LIB_ARC4) += libarc4.o libarc4-y := arc4.o +obj-$(CONFIG_CRYPTO_LIB_BLAKE2S_GENERIC) += libblake2s-generic.o +libblake2s-generic-y += blake2s-generic.o + +obj-$(CONFIG_CRYPTO_LIB_BLAKE2S) += libblake2s.o +libblake2s-y += blake2s.o + obj-$(CONFIG_CRYPTO_LIB_DES) += libdes.o libdes-y := des.o @@ -18,3 +24,7 @@ libpoly1305-y := poly1305.o obj-$(CONFIG_CRYPTO_LIB_SHA256) += libsha256.o libsha256-y := sha256.o + +ifneq ($(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS),y) +libblake2s-y += blake2s-selftest.o +endif diff --git a/lib/crypto/blake2s-generic.c b/lib/crypto/blake2s-generic.c new file mode 100644 index 000000000000..04ff8df24513 --- /dev/null +++ b/lib/crypto/blake2s-generic.c @@ -0,0 +1,111 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + * + * This is an implementation of the BLAKE2s hash and PRF functions. + * + * Information: https://blake2.net/ + * + */ + +#include <crypto/internal/blake2s.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/bug.h> +#include <asm/unaligned.h> + +static const u8 blake2s_sigma[10][16] = { + { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }, + { 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }, + { 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 }, + { 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 }, + { 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 }, + { 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 }, + { 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 }, + { 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 }, + { 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 }, + { 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0 }, +}; + +static inline void blake2s_increment_counter(struct blake2s_state *state, + const u32 inc) +{ + state->t[0] += inc; + state->t[1] += (state->t[0] < inc); +} + +void blake2s_compress_generic(struct blake2s_state *state,const u8 *block, + size_t nblocks, const u32 inc) +{ + u32 m[16]; + u32 v[16]; + int i; + + WARN_ON(IS_ENABLED(DEBUG) && + (nblocks > 1 && inc != BLAKE2S_BLOCK_SIZE)); + + while (nblocks > 0) { + blake2s_increment_counter(state, inc); + memcpy(m, block, BLAKE2S_BLOCK_SIZE); + le32_to_cpu_array(m, ARRAY_SIZE(m)); + memcpy(v, state->h, 32); + v[ 8] = BLAKE2S_IV0; + v[ 9] = BLAKE2S_IV1; + v[10] = BLAKE2S_IV2; + v[11] = BLAKE2S_IV3; + v[12] = BLAKE2S_IV4 ^ state->t[0]; + v[13] = BLAKE2S_IV5 ^ state->t[1]; + v[14] = BLAKE2S_IV6 ^ state->f[0]; + v[15] = BLAKE2S_IV7 ^ state->f[1]; + +#define G(r, i, a, b, c, d) do { \ + a += b + m[blake2s_sigma[r][2 * i + 0]]; \ + d = ror32(d ^ a, 16); \ + c += d; \ + b = ror32(b ^ c, 12); \ + a += b + m[blake2s_sigma[r][2 * i + 1]]; \ + d = ror32(d ^ a, 8); \ + c += d; \ + b = ror32(b ^ c, 7); \ +} while (0) + +#define ROUND(r) do { \ + G(r, 0, v[0], v[ 4], v[ 8], v[12]); \ + G(r, 1, v[1], v[ 5], v[ 9], v[13]); \ + G(r, 2, v[2], v[ 6], v[10], v[14]); \ + G(r, 3, v[3], v[ 7], v[11], v[15]); \ + G(r, 4, v[0], v[ 5], v[10], v[15]); \ + G(r, 5, v[1], v[ 6], v[11], v[12]); \ + G(r, 6, v[2], v[ 7], v[ 8], v[13]); \ + G(r, 7, v[3], v[ 4], v[ 9], v[14]); \ +} while (0) + ROUND(0); + ROUND(1); + ROUND(2); + ROUND(3); + ROUND(4); + ROUND(5); + ROUND(6); + ROUND(7); + ROUND(8); + ROUND(9); + +#undef G +#undef ROUND + + for (i = 0; i < 8; ++i) + state->h[i] ^= v[i] ^ v[i + 8]; + + block += BLAKE2S_BLOCK_SIZE; + --nblocks; + } +} + +EXPORT_SYMBOL(blake2s_compress_generic); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("BLAKE2s hash function"); +MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>"); diff --git a/lib/crypto/blake2s-selftest.c b/lib/crypto/blake2s-selftest.c new file mode 100644 index 000000000000..79ef404a990d --- /dev/null +++ b/lib/crypto/blake2s-selftest.c @@ -0,0 +1,622 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +#include <crypto/blake2s.h> +#include <linux/string.h> + +/* + * blake2s_testvecs[] generated with the program below (using libb2-dev and + * libssl-dev [OpenSSL]) + * + * #include <blake2.h> + * #include <stdint.h> + * #include <stdio.h> + * + * #include <openssl/evp.h> + * #include <openssl/hmac.h> + * + * #define BLAKE2S_TESTVEC_COUNT 256 + * + * static void print_vec(const uint8_t vec[], int len) + * { + * int i; + * + * printf(" { "); + * for (i = 0; i < len; i++) { + * if (i && (i % 12) == 0) + * printf("\n "); + * printf("0x%02x, ", vec[i]); + * } + * printf("},\n"); + * } + * + * int main(void) + * { + * uint8_t key[BLAKE2S_KEYBYTES]; + * uint8_t buf[BLAKE2S_TESTVEC_COUNT]; + * uint8_t hash[BLAKE2S_OUTBYTES]; + * int i, j; + * + * key[0] = key[1] = 1; + * for (i = 2; i < BLAKE2S_KEYBYTES; ++i) + * key[i] = key[i - 2] + key[i - 1]; + * + * for (i = 0; i < BLAKE2S_TESTVEC_COUNT; ++i) + * buf[i] = (uint8_t)i; + * + * printf("static const u8 blake2s_testvecs[][BLAKE2S_HASH_SIZE] __initconst = {\n"); + * + * for (i = 0; i < BLAKE2S_TESTVEC_COUNT; ++i) { + * int outlen = 1 + i % BLAKE2S_OUTBYTES; + * int keylen = (13 * i) % (BLAKE2S_KEYBYTES + 1); + * + * blake2s(hash, buf, key + BLAKE2S_KEYBYTES - keylen, outlen, i, + * keylen); + * print_vec(hash, outlen); + * } + * printf("};\n\n"); + * + * printf("static const u8 blake2s_hmac_testvecs[][BLAKE2S_HASH_SIZE] __initconst = {\n"); + * + * HMAC(EVP_blake2s256(), key, sizeof(key), buf, sizeof(buf), hash, NULL); + * print_vec(hash, BLAKE2S_OUTBYTES); + * + * HMAC(EVP_blake2s256(), buf, sizeof(buf), key, sizeof(key), hash, NULL); + * print_vec(hash, BLAKE2S_OUTBYTES); + * + * printf("};\n"); + * + * return 0; + *} + */ +static const u8 blake2s_testvecs[][BLAKE2S_HASH_SIZE] __initconst = { + { 0xa1, }, + { 0x7c, 0x89, }, + { 0x74, 0x0e, 0xd4, }, + { 0x47, 0x0c, 0x21, 0x15, }, + { 0x18, 0xd6, 0x9c, 0xa6, 0xc4, }, + { 0x13, 0x5d, 0x16, 0x63, 0x2e, 0xf9, }, + { 0x2c, 0xb5, 0x04, 0xb7, 0x99, 0xe2, 0x73, }, + { 0x9a, 0x0f, 0xd2, 0x39, 0xd6, 0x68, 0x1b, 0x92, }, + { 0xc8, 0xde, 0x7a, 0xea, 0x2f, 0xf4, 0xd2, 0xe3, 0x2b, }, + { 0x5b, 0xf9, 0x43, 0x52, 0x0c, 0x12, 0xba, 0xb5, 0x93, 0x9f, }, + { 0xc6, 0x2c, 0x4e, 0x80, 0xfc, 0x32, 0x5b, 0x33, 0xb8, 0xb8, 0x0a, }, + { 0xa7, 0x5c, 0xfd, 0x3a, 0xcc, 0xbf, 0x90, 0xca, 0xb7, 0x97, 0xde, 0xd8, }, + { 0x66, 0xca, 0x3c, 0xc4, 0x19, 0xef, 0x92, 0x66, 0x3f, 0x21, 0x8f, 0xda, + 0xb7, }, + { 0xba, 0xe5, 0xbb, 0x30, 0x25, 0x94, 0x6d, 0xc3, 0x89, 0x09, 0xc4, 0x25, + 0x52, 0x3e, }, + { 0xa2, 0xef, 0x0e, 0x52, 0x0b, 0x5f, 0xa2, 0x01, 0x6d, 0x0a, 0x25, 0xbc, + 0x57, 0xe2, 0x27, }, + { 0x4f, 0xe0, 0xf9, 0x52, 0x12, 0xda, 0x84, 0xb7, 0xab, 0xae, 0xb0, 0xa6, + 0x47, 0x2a, 0xc7, 0xf5, }, + { 0x56, 0xe7, 0xa8, 0x1c, 0x4c, 0xca, 0xed, 0x90, 0x31, 0xec, 0x87, 0x43, + 0xe7, 0x72, 0x08, 0xec, 0xbe, }, + { 0x7e, 0xdf, 0x80, 0x1c, 0x93, 0x33, 0xfd, 0x53, 0x44, 0xba, 0xfd, 0x96, + 0xe1, 0xbb, 0xb5, 0x65, 0xa5, 0x00, }, + { 0xec, 0x6b, 0xed, 0xf7, 0x7b, 0x62, 0x1d, 0x7d, 0xf4, 0x82, 0xf3, 0x1e, + 0x18, 0xff, 0x2b, 0xc4, 0x06, 0x20, 0x2a, }, + { 0x74, 0x98, 0xd7, 0x68, 0x63, 0xed, 0x87, 0xe4, 0x5d, 0x8d, 0x9e, 0x1d, + 0xfd, 0x2a, 0xbb, 0x86, 0xac, 0xe9, 0x2a, 0x89, }, + { 0x89, 0xc3, 0x88, 0xce, 0x2b, 0x33, 0x1e, 0x10, 0xd1, 0x37, 0x20, 0x86, + 0x28, 0x43, 0x70, 0xd9, 0xfb, 0x96, 0xd9, 0xb5, 0xd3, }, + { 0xcb, 0x56, 0x74, 0x41, 0x8d, 0x80, 0x01, 0x9a, 0x6b, 0x38, 0xe1, 0x41, + 0xad, 0x9c, 0x62, 0x74, 0xce, 0x35, 0xd5, 0x6c, 0x89, 0x6e, }, + { 0x79, 0xaf, 0x94, 0x59, 0x99, 0x26, 0xe1, 0xc9, 0x34, 0xfe, 0x7c, 0x22, + 0xf7, 0x43, 0xd7, 0x65, 0xd4, 0x48, 0x18, 0xac, 0x3d, 0xfd, 0x93, }, + { 0x85, 0x0d, 0xff, 0xb8, 0x3e, 0x87, 0x41, 0xb0, 0x95, 0xd3, 0x3d, 0x00, + 0x47, 0x55, 0x9e, 0xd2, 0x69, 0xea, 0xbf, 0xe9, 0x7a, 0x2d, 0x61, 0x45, }, + { 0x03, 0xe0, 0x85, 0xec, 0x54, 0xb5, 0x16, 0x53, 0xa8, 0xc4, 0x71, 0xe9, + 0x6a, 0xe7, 0xcb, 0xc4, 0x15, 0x02, 0xfc, 0x34, 0xa4, 0xa4, 0x28, 0x13, + 0xd1, }, + { 0xe3, 0x34, 0x4b, 0xe1, 0xd0, 0x4b, 0x55, 0x61, 0x8f, 0xc0, 0x24, 0x05, + 0xe6, 0xe0, 0x3d, 0x70, 0x24, 0x4d, 0xda, 0xb8, 0x91, 0x05, 0x29, 0x07, + 0x01, 0x3e, }, + { 0x61, 0xff, 0x01, 0x72, 0xb1, 0x4d, 0xf6, 0xfe, 0xd1, 0xd1, 0x08, 0x74, + 0xe6, 0x91, 0x44, 0xeb, 0x61, 0xda, 0x40, 0xaf, 0xfc, 0x8c, 0x91, 0x6b, + 0xec, 0x13, 0xed, }, + { 0xd4, 0x40, 0xd2, 0xa0, 0x7f, 0xc1, 0x58, 0x0c, 0x85, 0xa0, 0x86, 0xc7, + 0x86, 0xb9, 0x61, 0xc9, 0xea, 0x19, 0x86, 0x1f, 0xab, 0x07, 0xce, 0x37, + 0x72, 0x67, 0x09, 0xfc, }, + { 0x9e, 0xf8, 0x18, 0x67, 0x93, 0x10, 0x9b, 0x39, 0x75, 0xe8, 0x8b, 0x38, + 0x82, 0x7d, 0xb8, 0xb7, 0xa5, 0xaf, 0xe6, 0x6a, 0x22, 0x5e, 0x1f, 0x9c, + 0x95, 0x29, 0x19, 0xf2, 0x4b, }, + { 0xc8, 0x62, 0x25, 0xf5, 0x98, 0xc9, 0xea, 0xe5, 0x29, 0x3a, 0xd3, 0x22, + 0xeb, 0xeb, 0x07, 0x7c, 0x15, 0x07, 0xee, 0x15, 0x61, 0xbb, 0x05, 0x30, + 0x99, 0x7f, 0x11, 0xf6, 0x0a, 0x1d, }, + { 0x68, 0x70, 0xf7, 0x90, 0xa1, 0x8b, 0x1f, 0x0f, 0xbb, 0xce, 0xd2, 0x0e, + 0x33, 0x1f, 0x7f, 0xa9, 0x78, 0xa8, 0xa6, 0x81, 0x66, 0xab, 0x8d, 0xcd, + 0x58, 0x55, 0x3a, 0x0b, 0x7a, 0xdb, 0xb5, }, + { 0xdd, 0x35, 0xd2, 0xb4, 0xf6, 0xc7, 0xea, 0xab, 0x64, 0x24, 0x4e, 0xfe, + 0xe5, 0x3d, 0x4e, 0x95, 0x8b, 0x6d, 0x6c, 0xbc, 0xb0, 0xf8, 0x88, 0x61, + 0x09, 0xb7, 0x78, 0xa3, 0x31, 0xfe, 0xd9, 0x2f, }, + { 0x0a, }, + { 0x6e, 0xd4, }, + { 0x64, 0xe9, 0xd1, }, + { 0x30, 0xdd, 0x71, 0xef, }, + { 0x11, 0xb5, 0x0c, 0x87, 0xc9, }, + { 0x06, 0x1c, 0x6d, 0x04, 0x82, 0xd0, }, + { 0x5c, 0x42, 0x0b, 0xee, 0xc5, 0x9c, 0xb2, }, + { 0xe8, 0x29, 0xd6, 0xb4, 0x5d, 0xf7, 0x2b, 0x93, }, + { 0x18, 0xca, 0x27, 0x72, 0x43, 0x39, 0x16, 0xbc, 0x6a, }, + { 0x39, 0x8f, 0xfd, 0x64, 0xf5, 0x57, 0x23, 0xb0, 0x45, 0xf8, }, + { 0xbb, 0x3a, 0x78, 0x6b, 0x02, 0x1d, 0x0b, 0x16, 0xe3, 0xb2, 0x9a, }, + { 0xb8, 0xb4, 0x0b, 0xe5, 0xd4, 0x1d, 0x0d, 0x85, 0x49, 0x91, 0x35, 0xfa, }, + { 0x6d, 0x48, 0x2a, 0x0c, 0x42, 0x08, 0xbd, 0xa9, 0x78, 0x6f, 0x18, 0xaf, + 0xe2, }, + { 0x10, 0x45, 0xd4, 0x58, 0x88, 0xec, 0x4e, 0x1e, 0xf6, 0x14, 0x92, 0x64, + 0x7e, 0xb0, }, + { 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0x1a, 0xe4, + 0xd4, 0xdf, 0xc7, 0x02, 0x4c, 0x6a, 0x5f, 0xfd, 0x23, 0xac, 0xae, 0x6d, + 0x43, 0xa4, 0x7a, 0x50, 0x60, 0x3c, }, + { 0x1d, 0xb4, 0xc6, 0xe1, 0xb1, 0x4b, 0xe3, 0xf2, 0xe2, 0x1a, 0x73, 0x1b, + 0xa0, 0x92, 0xa7, 0xf5, 0xff, 0x8f, 0x8b, 0x5d, 0xdf, 0xa8, 0x04, 0xb3, + 0xb0, 0xf7, 0xcc, 0x12, 0xfa, 0x35, 0x46, }, + { 0x49, 0x45, 0x97, 0x11, 0x0f, 0x1c, 0x60, 0x8e, 0xe8, 0x47, 0x30, 0xcf, + 0x60, 0xa8, 0x71, 0xc5, 0x1b, 0xe9, 0x39, 0x4d, 0x49, 0xb6, 0x12, 0x1f, + 0x24, 0xab, 0x37, 0xff, 0x83, 0xc2, 0xe1, 0x3a, }, + { 0x60, }, + { 0x24, 0x26, }, + { 0x47, 0xeb, 0xc9, }, + { 0x4a, 0xd0, 0xbc, 0xf0, }, + { 0x8e, 0x2b, 0xc9, 0x85, 0x3c, }, + { 0xa2, 0x07, 0x15, 0xb8, 0x12, 0x74, }, + { 0x0f, 0xdb, 0x5b, 0x33, 0x69, 0xfe, 0x4b, }, + { 0xa2, 0x86, 0x54, 0xf4, 0xfd, 0xb2, 0xd4, 0xe6, }, + { 0xbb, 0x84, 0x78, 0x49, 0x27, 0x8e, 0x61, 0xda, 0x60, }, + { 0x04, 0xc3, 0xcd, 0xaa, 0x8f, 0xa7, 0x03, 0xc9, 0xf9, 0xb6, }, + { 0xf8, 0x27, 0x1d, 0x61, 0xdc, 0x21, 0x42, 0xdd, 0xad, 0x92, 0x40, }, + { 0x12, 0x87, 0xdf, 0xc2, 0x41, 0x45, 0x5a, 0x36, 0x48, 0x5b, 0x51, 0x2b, }, + { 0xbb, 0x37, 0x5d, 0x1f, 0xf1, 0x68, 0x7a, 0xc4, 0xa5, 0xd2, 0xa4, 0x91, + 0x8d, }, + { 0x5b, 0x27, 0xd1, 0x04, 0x54, 0x52, 0x9f, 0xa3, 0x47, 0x86, 0x33, 0x33, + 0xbf, 0xa0, }, + { 0xcf, 0x04, 0xea, 0xf8, 0x03, 0x2a, 0x43, 0xff, 0xa6, 0x68, 0x21, 0x4c, + 0xd5, 0x4b, 0xed, }, + { 0xaf, 0xb8, 0xbc, 0x63, 0x0f, 0x18, 0x4d, 0xe2, 0x7a, 0xdd, 0x46, 0x44, + 0xc8, 0x24, 0x0a, 0xb7, }, + { 0x3e, 0xdc, 0x36, 0xe4, 0x89, 0xb1, 0xfa, 0xc6, 0x40, 0x93, 0x2e, 0x75, + 0xb2, 0x15, 0xd1, 0xb1, 0x10, }, + { 0x6c, 0xd8, 0x20, 0x3b, 0x82, 0x79, 0xf9, 0xc8, 0xbc, 0x9d, 0xe0, 0x35, + 0xbe, 0x1b, 0x49, 0x1a, 0xbc, 0x3a, }, + { 0x78, 0x65, 0x2c, 0xbe, 0x35, 0x67, 0xdc, 0x78, 0xd4, 0x41, 0xf6, 0xc9, + 0xde, 0xde, 0x1f, 0x18, 0x13, 0x31, 0x11, }, + { 0x8a, 0x7f, 0xb1, 0x33, 0x8f, 0x0c, 0x3c, 0x0a, 0x06, 0x61, 0xf0, 0x47, + 0x29, 0x1b, 0x29, 0xbc, 0x1c, 0x47, 0xef, 0x7a, }, + { 0x65, 0x91, 0xf1, 0xe6, 0xb3, 0x96, 0xd3, 0x8c, 0xc2, 0x4a, 0x59, 0x35, + 0x72, 0x8e, 0x0b, 0x9a, 0x87, 0xca, 0x34, 0x7b, 0x63, }, + { 0x5f, 0x08, 0x87, 0x80, 0x56, 0x25, 0x89, 0x77, 0x61, 0x8c, 0x64, 0xa1, + 0x59, 0x6d, 0x59, 0x62, 0xe8, 0x4a, 0xc8, 0x58, 0x99, 0xd1, }, + { 0x23, 0x87, 0x1d, 0xed, 0x6f, 0xf2, 0x91, 0x90, 0xe2, 0xfe, 0x43, 0x21, + 0xaf, 0x97, 0xc6, 0xbc, 0xd7, 0x15, 0xc7, 0x2d, 0x08, 0x77, 0x91, }, + { 0x90, 0x47, 0x9a, 0x9e, 0x3a, 0xdf, 0xf3, 0xc9, 0x4c, 0x1e, 0xa7, 0xd4, + 0x6a, 0x32, 0x90, 0xfe, 0xb7, 0xb6, 0x7b, 0xfa, 0x96, 0x61, 0xfb, 0xa4, }, + { 0xb1, 0x67, 0x60, 0x45, 0xb0, 0x96, 0xc5, 0x15, 0x9f, 0x4d, 0x26, 0xd7, + 0x9d, 0xf1, 0xf5, 0x6d, 0x21, 0x00, 0x94, 0x31, 0x64, 0x94, 0xd3, 0xa7, + 0xd3, }, + { 0x02, 0x3e, 0xaf, 0xf3, 0x79, 0x73, 0xa5, 0xf5, 0xcc, 0x7a, 0x7f, 0xfb, + 0x79, 0x2b, 0x85, 0x8c, 0x88, 0x72, 0x06, 0xbe, 0xfe, 0xaf, 0xc1, 0x16, + 0xa6, 0xd6, }, + { 0x2a, 0xb0, 0x1a, 0xe5, 0xaa, 0x6e, 0xb3, 0xae, 0x53, 0x85, 0x33, 0x80, + 0x75, 0xae, 0x30, 0xe6, 0xb8, 0x72, 0x42, 0xf6, 0x25, 0x4f, 0x38, 0x88, + 0x55, 0xd1, 0xa9, }, + { 0x90, 0xd8, 0x0c, 0xc0, 0x93, 0x4b, 0x4f, 0x9e, 0x65, 0x6c, 0xa1, 0x54, + 0xa6, 0xf6, 0x6e, 0xca, 0xd2, 0xbb, 0x7e, 0x6a, 0x1c, 0xd3, 0xce, 0x46, + 0xef, 0xb0, 0x00, 0x8d, }, + { 0xed, 0x9c, 0x49, 0xcd, 0xc2, 0xde, 0x38, 0x0e, 0xe9, 0x98, 0x6c, 0xc8, + 0x90, 0x9e, 0x3c, 0xd4, 0xd3, 0xeb, 0x88, 0x32, 0xc7, 0x28, 0xe3, 0x94, + 0x1c, 0x9f, 0x8b, 0xf3, 0xcb, }, + { 0xac, 0xe7, 0x92, 0x16, 0xb4, 0x14, 0xa0, 0xe4, 0x04, 0x79, 0xa2, 0xf4, + 0x31, 0xe6, 0x0c, 0x26, 0xdc, 0xbf, 0x2f, 0x69, 0x1b, 0x55, 0x94, 0x67, + 0xda, 0x0c, 0xd7, 0x32, 0x1f, 0xef, }, + { 0x68, 0x63, 0x85, 0x57, 0x95, 0x9e, 0x42, 0x27, 0x41, 0x43, 0x42, 0x02, + 0xa5, 0x78, 0xa7, 0xc6, 0x43, 0xc1, 0x6a, 0xba, 0x70, 0x80, 0xcd, 0x04, + 0xb6, 0x78, 0x76, 0x29, 0xf3, 0xe8, 0xa0, }, + { 0xe6, 0xac, 0x8d, 0x9d, 0xf0, 0xc0, 0xf7, 0xf7, 0xe3, 0x3e, 0x4e, 0x28, + 0x0f, 0x59, 0xb2, 0x67, 0x9e, 0x84, 0x34, 0x42, 0x96, 0x30, 0x2b, 0xca, + 0x49, 0xb6, 0xc5, 0x9a, 0x84, 0x59, 0xa7, 0x81, }, + { 0x7e, }, + { 0x1e, 0x21, }, + { 0x26, 0xd3, 0xdd, }, + { 0x2c, 0xd4, 0xb3, 0x3d, }, + { 0x86, 0x7b, 0x76, 0x3c, 0xf0, }, + { 0x12, 0xc3, 0x70, 0x1d, 0x55, 0x18, }, + { 0x96, 0xc2, 0xbd, 0x61, 0x55, 0xf4, 0x24, }, + { 0x20, 0x51, 0xf7, 0x86, 0x58, 0x8f, 0x07, 0x2a, }, + { 0x93, 0x15, 0xa8, 0x1d, 0xda, 0x97, 0xee, 0x0e, 0x6c, }, + { 0x39, 0x93, 0xdf, 0xd5, 0x0e, 0xca, 0xdc, 0x7a, 0x92, 0xce, }, + { 0x60, 0xd5, 0xfd, 0xf5, 0x1b, 0x26, 0x82, 0x26, 0x73, 0x02, 0xbc, }, + { 0x98, 0xf2, 0x34, 0xe1, 0xf5, 0xfb, 0x00, 0xac, 0x10, 0x4a, 0x38, 0x9f, }, + { 0xda, 0x3a, 0x92, 0x8a, 0xd0, 0xcd, 0x12, 0xcd, 0x15, 0xbb, 0xab, 0x77, + 0x66, }, + { 0xa2, 0x92, 0x1a, 0xe5, 0xca, 0x0c, 0x30, 0x75, 0xeb, 0xaf, 0x00, 0x31, + 0x55, 0x66, }, + { 0x06, 0xea, 0xfd, 0x3e, 0x86, 0x38, 0x62, 0x4e, 0xa9, 0x12, 0xa4, 0x12, + 0x43, 0xbf, 0xa1, }, + { 0xe4, 0x71, 0x7b, 0x94, 0xdb, 0xa0, 0xd2, 0xff, 0x9b, 0xeb, 0xad, 0x8e, + 0x95, 0x8a, 0xc5, 0xed, }, + { 0x25, 0x5a, 0x77, 0x71, 0x41, 0x0e, 0x7a, 0xe9, 0xed, 0x0c, 0x10, 0xef, + 0xf6, 0x2b, 0x3a, 0xba, 0x60, }, + { 0xee, 0xe2, 0xa3, 0x67, 0x64, 0x1d, 0xc6, 0x04, 0xc4, 0xe1, 0x68, 0xd2, + 0x6e, 0xd2, 0x91, 0x75, 0x53, 0x07, }, + { 0xe0, 0xf6, 0x4d, 0x8f, 0x68, 0xfc, 0x06, 0x7e, 0x18, 0x79, 0x7f, 0x2b, + 0x6d, 0xef, 0x46, 0x7f, 0xab, 0xb2, 0xad, }, + { 0x3d, 0x35, 0x88, 0x9f, 0x2e, 0xcf, 0x96, 0x45, 0x07, 0x60, 0x71, 0x94, + 0x00, 0x8d, 0xbf, 0xf4, 0xef, 0x46, 0x2e, 0x3c, }, + { 0x43, 0xcf, 0x98, 0xf7, 0x2d, 0xf4, 0x17, 0xe7, 0x8c, 0x05, 0x2d, 0x9b, + 0x24, 0xfb, 0x4d, 0xea, 0x4a, 0xec, 0x01, 0x25, 0x29, }, + { 0x8e, 0x73, 0x9a, 0x78, 0x11, 0xfe, 0x48, 0xa0, 0x3b, 0x1a, 0x26, 0xdf, + 0x25, 0xe9, 0x59, 0x1c, 0x70, 0x07, 0x9f, 0xdc, 0xa0, 0xa6, }, + { 0xe8, 0x47, 0x71, 0xc7, 0x3e, 0xdf, 0xb5, 0x13, 0xb9, 0x85, 0x13, 0xa8, + 0x54, 0x47, 0x6e, 0x59, 0x96, 0x09, 0x13, 0x5f, 0x82, 0x16, 0x0b, }, + { 0xfb, 0xc0, 0x8c, 0x03, 0x21, 0xb3, 0xc4, 0xb5, 0x43, 0x32, 0x6c, 0xea, + 0x7f, 0xa8, 0x43, 0x91, 0xe8, 0x4e, 0x3f, 0xbf, 0x45, 0x58, 0x6a, 0xa3, }, + { 0x55, 0xf8, 0xf3, 0x00, 0x76, 0x09, 0xef, 0x69, 0x5d, 0xd2, 0x8a, 0xf2, + 0x65, 0xc3, 0xcb, 0x9b, 0x43, 0xfd, 0xb1, 0x7e, 0x7f, 0xa1, 0x94, 0xb0, + 0xd7, }, + { 0xaa, 0x13, 0xc1, 0x51, 0x40, 0x6d, 0x8d, 0x4c, 0x0a, 0x95, 0x64, 0x7b, + 0xd1, 0x96, 0xb6, 0x56, 0xb4, 0x5b, 0xcf, 0xd6, 0xd9, 0x15, 0x97, 0xdd, + 0xb6, 0xef, }, + { 0xaf, 0xb7, 0x36, 0xb0, 0x04, 0xdb, 0xd7, 0x9c, 0x9a, 0x44, 0xc4, 0xf6, + 0x1f, 0x12, 0x21, 0x2d, 0x59, 0x30, 0x54, 0xab, 0x27, 0x61, 0xa3, 0x57, + 0xef, 0xf8, 0x53, }, + { 0x97, 0x34, 0x45, 0x3e, 0xce, 0x7c, 0x35, 0xa2, 0xda, 0x9f, 0x4b, 0x46, + 0x6c, 0x11, 0x67, 0xff, 0x2f, 0x76, 0x58, 0x15, 0x71, 0xfa, 0x44, 0x89, + 0x89, 0xfd, 0xf7, 0x99, }, + { 0x1f, 0xb1, 0x62, 0xeb, 0x83, 0xc5, 0x9c, 0x89, 0xf9, 0x2c, 0xd2, 0x03, + 0x61, 0xbc, 0xbb, 0xa5, 0x74, 0x0e, 0x9b, 0x7e, 0x82, 0x3e, 0x70, 0x0a, + 0xa9, 0x8f, 0x2b, 0x59, 0xfb, }, + { 0xf8, 0xca, 0x5e, 0x3a, 0x4f, 0x9e, 0x10, 0x69, 0x10, 0xd5, 0x4c, 0xeb, + 0x1a, 0x0f, 0x3c, 0x6a, 0x98, 0xf5, 0xb0, 0x97, 0x5b, 0x37, 0x2f, 0x0d, + 0xbd, 0x42, 0x4b, 0x69, 0xa1, 0x82, }, + { 0x12, 0x8c, 0x6d, 0x52, 0x08, 0xef, 0x74, 0xb2, 0xe6, 0xaa, 0xd3, 0xb0, + 0x26, 0xb0, 0xd9, 0x94, 0xb6, 0x11, 0x45, 0x0e, 0x36, 0x71, 0x14, 0x2d, + 0x41, 0x8c, 0x21, 0x53, 0x31, 0xe9, 0x68, }, + { 0xee, 0xea, 0x0d, 0x89, 0x47, 0x7e, 0x72, 0xd1, 0xd8, 0xce, 0x58, 0x4c, + 0x94, 0x1f, 0x0d, 0x51, 0x08, 0xa3, 0xb6, 0x3d, 0xe7, 0x82, 0x46, 0x92, + 0xd6, 0x98, 0x6b, 0x07, 0x10, 0x65, 0x52, 0x65, }, +}; + +static const u8 blake2s_hmac_testvecs[][BLAKE2S_HASH_SIZE] __initconst = { + { 0xce, 0xe1, 0x57, 0x69, 0x82, 0xdc, 0xbf, 0x43, 0xad, 0x56, 0x4c, 0x70, + 0xed, 0x68, 0x16, 0x96, 0xcf, 0xa4, 0x73, 0xe8, 0xe8, 0xfc, 0x32, 0x79, + 0x08, 0x0a, 0x75, 0x82, 0xda, 0x3f, 0x05, 0x11, }, + { 0x77, 0x2f, 0x0c, 0x71, 0x41, 0xf4, 0x4b, 0x2b, 0xb3, 0xc6, 0xb6, 0xf9, + 0x60, 0xde, 0xe4, 0x52, 0x38, 0x66, 0xe8, 0xbf, 0x9b, 0x96, 0xc4, 0x9f, + 0x60, 0xd9, 0x24, 0x37, 0x99, 0xd6, 0xec, 0x31, }, +}; + +bool __init blake2s_selftest(void) +{ + u8 key[BLAKE2S_KEY_SIZE]; + u8 buf[ARRAY_SIZE(blake2s_testvecs)]; + u8 hash[BLAKE2S_HASH_SIZE]; + struct blake2s_state state; + bool success = true; + int i, l; + + key[0] = key[1] = 1; + for (i = 2; i < sizeof(key); ++i) + key[i] = key[i - 2] + key[i - 1]; + + for (i = 0; i < sizeof(buf); ++i) + buf[i] = (u8)i; + + for (i = l = 0; i < ARRAY_SIZE(blake2s_testvecs); l = (l + 37) % ++i) { + int outlen = 1 + i % BLAKE2S_HASH_SIZE; + int keylen = (13 * i) % (BLAKE2S_KEY_SIZE + 1); + + blake2s(hash, buf, key + BLAKE2S_KEY_SIZE - keylen, outlen, i, + keylen); + if (memcmp(hash, blake2s_testvecs[i], outlen)) { + pr_err("blake2s self-test %d: FAIL\n", i + 1); + success = false; + } + + if (!keylen) + blake2s_init(&state, outlen); + else + blake2s_init_key(&state, outlen, + key + BLAKE2S_KEY_SIZE - keylen, + keylen); + + blake2s_update(&state, buf, l); + blake2s_update(&state, buf + l, i - l); + blake2s_final(&state, hash); + if (memcmp(hash, blake2s_testvecs[i], outlen)) { + pr_err("blake2s init/update/final self-test %d: FAIL\n", + i + 1); + success = false; + } + } + + if (success) { + blake2s256_hmac(hash, buf, key, sizeof(buf), sizeof(key)); + success &= !memcmp(hash, blake2s_hmac_testvecs[0], BLAKE2S_HASH_SIZE); + + blake2s256_hmac(hash, key, buf, sizeof(key), sizeof(buf)); + success &= !memcmp(hash, blake2s_hmac_testvecs[1], BLAKE2S_HASH_SIZE); + + if (!success) + pr_err("blake2s256_hmac self-test: FAIL\n"); + } + + return success; +} diff --git a/lib/crypto/blake2s.c b/lib/crypto/blake2s.c new file mode 100644 index 000000000000..41025a30c524 --- /dev/null +++ b/lib/crypto/blake2s.c @@ -0,0 +1,126 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + * + * This is an implementation of the BLAKE2s hash and PRF functions. + * + * Information: https://blake2.net/ + * + */ + +#include <crypto/internal/blake2s.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/bug.h> +#include <asm/unaligned.h> + +bool blake2s_selftest(void); + +void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen) +{ + const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen; + + if (unlikely(!inlen)) + return; + if (inlen > fill) { + memcpy(state->buf + state->buflen, in, fill); + if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S)) + blake2s_compress_arch(state, state->buf, 1, + BLAKE2S_BLOCK_SIZE); + else + blake2s_compress_generic(state, state->buf, 1, + BLAKE2S_BLOCK_SIZE); + state->buflen = 0; + in += fill; + inlen -= fill; + } + if (inlen > BLAKE2S_BLOCK_SIZE) { + const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE); + /* Hash one less (full) block than strictly possible */ + if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S)) + blake2s_compress_arch(state, in, nblocks - 1, + BLAKE2S_BLOCK_SIZE); + else + blake2s_compress_generic(state, in, nblocks - 1, + BLAKE2S_BLOCK_SIZE); + in += BLAKE2S_BLOCK_SIZE * (nblocks - 1); + inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1); + } + memcpy(state->buf + state->buflen, in, inlen); + state->buflen += inlen; +} +EXPORT_SYMBOL(blake2s_update); + +void blake2s_final(struct blake2s_state *state, u8 *out) +{ + WARN_ON(IS_ENABLED(DEBUG) && !out); + blake2s_set_lastblock(state); + memset(state->buf + state->buflen, 0, + BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */ + if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S)) + blake2s_compress_arch(state, state->buf, 1, state->buflen); + else + blake2s_compress_generic(state, state->buf, 1, state->buflen); + cpu_to_le32_array(state->h, ARRAY_SIZE(state->h)); + memcpy(out, state->h, state->outlen); + memzero_explicit(state, sizeof(*state)); +} +EXPORT_SYMBOL(blake2s_final); + +void blake2s256_hmac(u8 *out, const u8 *in, const u8 *key, const size_t inlen, + const size_t keylen) +{ + struct blake2s_state state; + u8 x_key[BLAKE2S_BLOCK_SIZE] __aligned(__alignof__(u32)) = { 0 }; + u8 i_hash[BLAKE2S_HASH_SIZE] __aligned(__alignof__(u32)); + int i; + + if (keylen > BLAKE2S_BLOCK_SIZE) { + blake2s_init(&state, BLAKE2S_HASH_SIZE); + blake2s_update(&state, key, keylen); + blake2s_final(&state, x_key); + } else + memcpy(x_key, key, keylen); + + for (i = 0; i < BLAKE2S_BLOCK_SIZE; ++i) + x_key[i] ^= 0x36; + + blake2s_init(&state, BLAKE2S_HASH_SIZE); + blake2s_update(&state, x_key, BLAKE2S_BLOCK_SIZE); + blake2s_update(&state, in, inlen); + blake2s_final(&state, i_hash); + + for (i = 0; i < BLAKE2S_BLOCK_SIZE; ++i) + x_key[i] ^= 0x5c ^ 0x36; + + blake2s_init(&state, BLAKE2S_HASH_SIZE); + blake2s_update(&state, x_key, BLAKE2S_BLOCK_SIZE); + blake2s_update(&state, i_hash, BLAKE2S_HASH_SIZE); + blake2s_final(&state, i_hash); + + memcpy(out, i_hash, BLAKE2S_HASH_SIZE); + memzero_explicit(x_key, BLAKE2S_BLOCK_SIZE); + memzero_explicit(i_hash, BLAKE2S_HASH_SIZE); +} +EXPORT_SYMBOL(blake2s256_hmac); + +static int __init mod_init(void) +{ + if (!IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS) && + WARN_ON(!blake2s_selftest())) + return -ENODEV; + return 0; +} + +static void __exit mod_exit(void) +{ +} + +module_init(mod_init); +module_exit(mod_exit); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("BLAKE2s hash function"); +MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>");

[v5,22/34] crypto: BLAKE2s - generic C library implementation and selftest

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Patch