diff options
Diffstat (limited to 'src/crypto/siphash.h')
-rw-r--r-- | src/crypto/siphash.h | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/src/crypto/siphash.h b/src/crypto/siphash.h deleted file mode 100644 index 454c7d5..0000000 --- a/src/crypto/siphash.h +++ /dev/null @@ -1,92 +0,0 @@ -/* Copyright (C) 2015-2017 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. - * - * SipHash: a fast short-input PRF - * https://131002.net/siphash/ - * - * This implementation is specifically for SipHash2-4. - */ - -#ifndef SIPHASH_H -#define SIPHASH_H - -#include <linux/types.h> -#include <linux/kernel.h> - -#define SIPHASH_ALIGNMENT 8 -typedef u64 siphash_key_t[2]; - -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); - -static inline u64 ___siphash_aligned(const __le64 *data, size_t len, const siphash_key_t 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); -} - -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_6u32(const u32 a, const u32 b, const u32 c, const u32 d, - const u32 e, const u32 f, const siphash_key_t key) -{ - return siphash_3u64((u64)b << 32 | a, (u64)d << 32 | c, (u64)f << 32 | e, - key); -} - -static inline u64 siphash_8u32(const u32 a, const u32 b, const u32 c, const u32 d, - const u32 e, const u32 f, const u32 g, const u32 h, - const siphash_key_t key) -{ - return siphash_4u64((u64)b << 32 | a, (u64)d << 32 | c, (u64)f << 32 | e, - (u64)h << 32 | g, key); -} - -#ifdef DEBUG -bool siphash_selftest(void); -#endif - -#endif /* SIPHASH_H */ |