From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- lib/crypto/blake2s.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 lib/crypto/blake2s.c (limited to 'lib/crypto/blake2s.c') diff --git a/lib/crypto/blake2s.c b/lib/crypto/blake2s.c new file mode 100644 index 0000000000..71a316552c --- /dev/null +++ b/lib/crypto/blake2s.c @@ -0,0 +1,71 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Copyright (C) 2015-2019 Jason A. Donenfeld . All Rights Reserved. + * + * This is an implementation of the BLAKE2s hash and PRF functions. + * + * Information: https://blake2.net/ + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static inline void blake2s_set_lastblock(struct blake2s_state *state) +{ + state->f[0] = -1; +} + +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); + blake2s_compress(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); + blake2s_compress(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 */ + blake2s_compress(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); + +static int __init blake2s_mod_init(void) +{ + if (!IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS) && + WARN_ON(!blake2s_selftest())) + return -ENODEV; + return 0; +} + +module_init(blake2s_mod_init); +MODULE_DESCRIPTION("BLAKE2s hash function"); +MODULE_AUTHOR("Jason A. Donenfeld "); -- cgit v1.2.3