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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166/* SPDX-License-Identifier: GPL-2.0 OR MIT */
#ifndef _CRYPTO_BLAKE2B_H#define _CRYPTO_BLAKE2B_H
#include <linux/bug.h>#include <linux/types.h>#include <linux/string.h>
enum blake2b_lengths { BLAKE2B_BLOCK_SIZE = 128, BLAKE2B_HASH_SIZE = 64, BLAKE2B_KEY_SIZE = 64,
BLAKE2B_160_HASH_SIZE = 20, BLAKE2B_256_HASH_SIZE = 32, BLAKE2B_384_HASH_SIZE = 48, BLAKE2B_512_HASH_SIZE = 64,};
/** * struct blake2b_ctx - Context for hashing a message with BLAKE2b * @h: compression function state * @t: block counter * @f: finalization indicator * @buf: partial block buffer; 'buflen' bytes are valid * @buflen: number of bytes buffered in @buf * @outlen: length of output hash value in bytes, at most BLAKE2B_HASH_SIZE */struct blake2b_ctx { /* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */ u64 h[8]; u64 t[2]; u64 f[2]; u8 buf[BLAKE2B_BLOCK_SIZE]; unsigned int buflen; unsigned int outlen;};
/** * blake2b_zeroize_ctx() - Zeroize a blake2b_ctx structure * @ctx: The blake2b_ctx to zeroize */static inline void blake2b_zeroize_ctx(struct blake2b_ctx *ctx){ memzero_explicit(ctx, sizeof(*ctx));}
enum blake2b_iv { BLAKE2B_IV0 = 0x6A09E667F3BCC908ULL, BLAKE2B_IV1 = 0xBB67AE8584CAA73BULL, BLAKE2B_IV2 = 0x3C6EF372FE94F82BULL, BLAKE2B_IV3 = 0xA54FF53A5F1D36F1ULL, BLAKE2B_IV4 = 0x510E527FADE682D1ULL, BLAKE2B_IV5 = 0x9B05688C2B3E6C1FULL, BLAKE2B_IV6 = 0x1F83D9ABFB41BD6BULL, BLAKE2B_IV7 = 0x5BE0CD19137E2179ULL,};
static inline void __blake2b_init(struct blake2b_ctx *ctx, size_t outlen, const void *key, size_t keylen){ ctx->h[0] = BLAKE2B_IV0 ^ (0x01010000 | keylen << 8 | outlen); ctx->h[1] = BLAKE2B_IV1; ctx->h[2] = BLAKE2B_IV2; ctx->h[3] = BLAKE2B_IV3; ctx->h[4] = BLAKE2B_IV4; ctx->h[5] = BLAKE2B_IV5; ctx->h[6] = BLAKE2B_IV6; ctx->h[7] = BLAKE2B_IV7; ctx->t[0] = 0; ctx->t[1] = 0; ctx->f[0] = 0; ctx->f[1] = 0; ctx->buflen = 0; ctx->outlen = outlen; if (keylen) { memcpy(ctx->buf, key, keylen); memset(&ctx->buf[keylen], 0, BLAKE2B_BLOCK_SIZE - keylen); ctx->buflen = BLAKE2B_BLOCK_SIZE; }}
/** * blake2b_init() - Initialize a BLAKE2b context for a new message (unkeyed) * @ctx: the context to initialize * @outlen: length of output hash value in bytes, at most BLAKE2B_HASH_SIZE * * Context: Any context. */static inline void blake2b_init(struct blake2b_ctx *ctx, size_t outlen){ __blake2b_init(ctx, outlen, NULL, 0);}
/** * blake2b_init_key() - Initialize a BLAKE2b context for a new message (keyed) * @ctx: the context to initialize * @outlen: length of output hash value in bytes, at most BLAKE2B_HASH_SIZE * @key: the key * @keylen: the key length in bytes, at most BLAKE2B_KEY_SIZE * * Context: Any context. */static inline void blake2b_init_key(struct blake2b_ctx *ctx, size_t outlen, const void *key, size_t keylen){ WARN_ON(IS_ENABLED(DEBUG) && (!outlen || outlen > BLAKE2B_HASH_SIZE || !key || !keylen || keylen > BLAKE2B_KEY_SIZE));
__blake2b_init(ctx, outlen, key, keylen);}
/** * blake2b_update() - Update a BLAKE2b context with message data * @ctx: the context to update; must have been initialized * @in: the message data * @inlen: the data length in bytes * * This can be called any number of times. * * Context: Any context. */void blake2b_update(struct blake2b_ctx *ctx, const u8 *in, size_t inlen);
/** * blake2b_final() - Finish computing a BLAKE2b hash * @ctx: the context to finalize; must have been initialized * @out: (output) the resulting BLAKE2b hash. Its length will be equal to the * @outlen that was passed to blake2b_init() or blake2b_init_key(). * * After finishing, this zeroizes @ctx. So the caller does not need to do it. * * Context: Any context. */void blake2b_final(struct blake2b_ctx *ctx, u8 *out);
/** * blake2b() - Compute BLAKE2b hash in one shot * @key: the key, or NULL for an unkeyed hash * @keylen: the key length in bytes (at most BLAKE2B_KEY_SIZE), or 0 for an * unkeyed hash * @in: the message data * @inlen: the data length in bytes * @out: (output) the resulting BLAKE2b hash, with length @outlen * @outlen: length of output hash value in bytes, at most BLAKE2B_HASH_SIZE * * Context: Any context. */static inline void blake2b(const u8 *key, size_t keylen, const u8 *in, size_t inlen, u8 *out, size_t outlen){ struct blake2b_ctx ctx;
WARN_ON(IS_ENABLED(DEBUG) && ((!in && inlen > 0) || !out || !outlen || outlen > BLAKE2B_HASH_SIZE || keylen > BLAKE2B_KEY_SIZE || (!key && keylen)));
__blake2b_init(&ctx, outlen, key, keylen); blake2b_update(&ctx, in, inlen); blake2b_final(&ctx, out);}
#endif /* _CRYPTO_BLAKE2B_H */