diff options
author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-16 17:00:02 -0500 |
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committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-16 17:17:23 -0500 |
commit | b5fd066153c40a70a29caa1ea7987723ab687763 (patch) | |
tree | 6d43a8b0a90d549a54c65565ac96c92b3e84b594 /c_src/include/linux/siphash.h | |
parent | 06ff8b55b70fda44d91b31b5511fafd1680a8934 (diff) |
Move c_src dirs back to toplevel
We just wanted c sourcefiles out of the top level, not c source
directories.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'c_src/include/linux/siphash.h')
-rw-r--r-- | c_src/include/linux/siphash.h | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/c_src/include/linux/siphash.h b/c_src/include/linux/siphash.h deleted file mode 100644 index bf21591a..00000000 --- a/c_src/include/linux/siphash.h +++ /dev/null @@ -1,145 +0,0 @@ -/* Copyright (C) 2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. - * - * This file is provided under a dual BSD/GPLv2 license. - * - * SipHash: a fast short-input PRF - * https://131002.net/siphash/ - * - * This implementation is specifically for SipHash2-4 for a secure PRF - * and HalfSipHash1-3/SipHash1-3 for an insecure PRF only suitable for - * hashtables. - */ - -#ifndef _LINUX_SIPHASH_H -#define _LINUX_SIPHASH_H - -#include <linux/types.h> -#include <linux/kernel.h> - -#define SIPHASH_ALIGNMENT __alignof__(u64) -typedef struct { - u64 key[2]; -} siphash_key_t; - -static inline bool siphash_key_is_zero(const siphash_key_t *key) -{ - return !(key->key[0] | key->key[1]); -} - -u64 __siphash_aligned(const void *data, size_t len, const siphash_key_t *key); -#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS -u64 __siphash_unaligned(const void *data, size_t len, const siphash_key_t *key); -#endif - -u64 siphash_1u64(const u64 a, const siphash_key_t *key); -u64 siphash_2u64(const u64 a, const u64 b, const siphash_key_t *key); -u64 siphash_3u64(const u64 a, const u64 b, const u64 c, - const siphash_key_t *key); -u64 siphash_4u64(const u64 a, const u64 b, const u64 c, const u64 d, - const siphash_key_t *key); -u64 siphash_1u32(const u32 a, const siphash_key_t *key); -u64 siphash_3u32(const u32 a, const u32 b, const u32 c, - const siphash_key_t *key); - -static inline u64 siphash_2u32(const u32 a, const u32 b, - const siphash_key_t *key) -{ - return siphash_1u64((u64)b << 32 | a, key); -} -static inline u64 siphash_4u32(const u32 a, const u32 b, const u32 c, - const u32 d, const siphash_key_t *key) -{ - return siphash_2u64((u64)b << 32 | a, (u64)d << 32 | c, key); -} - - -static inline u64 ___siphash_aligned(const __le64 *data, size_t len, - const siphash_key_t *key) -{ - if (__builtin_constant_p(len) && len == 4) - return siphash_1u32(le32_to_cpup((const __le32 *)data), key); - if (__builtin_constant_p(len) && len == 8) - return siphash_1u64(le64_to_cpu(data[0]), key); - if (__builtin_constant_p(len) && len == 16) - return siphash_2u64(le64_to_cpu(data[0]), le64_to_cpu(data[1]), - key); - if (__builtin_constant_p(len) && len == 24) - return siphash_3u64(le64_to_cpu(data[0]), le64_to_cpu(data[1]), - le64_to_cpu(data[2]), key); - if (__builtin_constant_p(len) && len == 32) - return siphash_4u64(le64_to_cpu(data[0]), le64_to_cpu(data[1]), - le64_to_cpu(data[2]), le64_to_cpu(data[3]), - key); - return __siphash_aligned(data, len, key); -} - -/** - * siphash - compute 64-bit siphash PRF value - * @data: buffer to hash - * @size: size of @data - * @key: the siphash key - */ -static inline u64 siphash(const void *data, size_t len, - const siphash_key_t *key) -{ -#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS - if (!IS_ALIGNED((unsigned long)data, SIPHASH_ALIGNMENT)) - return __siphash_unaligned(data, len, key); -#endif - return ___siphash_aligned(data, len, key); -} - -#define HSIPHASH_ALIGNMENT __alignof__(unsigned long) -typedef struct { - unsigned long key[2]; -} hsiphash_key_t; - -u32 __hsiphash_aligned(const void *data, size_t len, - const hsiphash_key_t *key); -#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS -u32 __hsiphash_unaligned(const void *data, size_t len, - const hsiphash_key_t *key); -#endif - -u32 hsiphash_1u32(const u32 a, const hsiphash_key_t *key); -u32 hsiphash_2u32(const u32 a, const u32 b, const hsiphash_key_t *key); -u32 hsiphash_3u32(const u32 a, const u32 b, const u32 c, - const hsiphash_key_t *key); -u32 hsiphash_4u32(const u32 a, const u32 b, const u32 c, const u32 d, - const hsiphash_key_t *key); - -static inline u32 ___hsiphash_aligned(const __le32 *data, size_t len, - const hsiphash_key_t *key) -{ - if (__builtin_constant_p(len) && len == 4) - return hsiphash_1u32(le32_to_cpu(data[0]), key); - if (__builtin_constant_p(len) && len == 8) - return hsiphash_2u32(le32_to_cpu(data[0]), le32_to_cpu(data[1]), - key); - if (__builtin_constant_p(len) && len == 12) - return hsiphash_3u32(le32_to_cpu(data[0]), le32_to_cpu(data[1]), - le32_to_cpu(data[2]), key); - if (__builtin_constant_p(len) && len == 16) - return hsiphash_4u32(le32_to_cpu(data[0]), le32_to_cpu(data[1]), - le32_to_cpu(data[2]), le32_to_cpu(data[3]), - key); - return __hsiphash_aligned(data, len, key); -} - -/** - * hsiphash - compute 32-bit hsiphash PRF value - * @data: buffer to hash - * @size: size of @data - * @key: the hsiphash key - */ -static inline u32 hsiphash(const void *data, size_t len, - const hsiphash_key_t *key) -{ -#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS - if (!IS_ALIGNED((unsigned long)data, HSIPHASH_ALIGNMENT)) - return __hsiphash_unaligned(data, len, key); -#endif - return ___hsiphash_aligned(data, len, key); -} - -#endif /* _LINUX_SIPHASH_H */ |