1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
2 /* Copyright (C) 2016-2022 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
4  * SipHash: a fast short-input PRF
7  * This implementation is specifically for SipHash2-4 for a secure PRF
8  * and HalfSipHash1-3/SipHash1-3 for an insecure PRF only suitable for
20 	u64 key[2];  member
25 static inline bool siphash_key_is_zero(const siphash_key_t *key)  in siphash_key_is_zero()  argument
27 	return !(key->key[0] | key->key[1]);  in siphash_key_is_zero()
30 u64 __siphash_aligned(const void *data, size_t len, const siphash_key_t *key);
31 u64 __siphash_unaligned(const void *data, size_t len, const siphash_key_t *key);
33 u64 siphash_1u64(const u64 a, const siphash_key_t *key);
34 u64 siphash_2u64(const u64 a, const u64 b, const siphash_key_t *key);
36 		 const siphash_key_t *key);
38 		 const siphash_key_t *key);
39 u64 siphash_1u32(const u32 a, const siphash_key_t *key);
41 		 const siphash_key_t *key);
44 			       const siphash_key_t *key)  in siphash_2u32()  argument
46 	return siphash_1u64((u64)b << 32 | a, key);  in siphash_2u32()
49 			       const u32 d, const siphash_key_t *key)  in siphash_4u32()  argument
51 	return siphash_2u64((u64)b << 32 | a, (u64)d << 32 | c, key);  in siphash_4u32()
56 				     const siphash_key_t *key)  in ___siphash_aligned()  argument
59 		return siphash_1u32(le32_to_cpup((const __le32 *)data), key);  in ___siphash_aligned()
61 		return siphash_1u64(le64_to_cpu(data[0]), key);  in ___siphash_aligned()
64 				    key);  in ___siphash_aligned()
67 				    le64_to_cpu(data[2]), key);  in ___siphash_aligned()
70 				    le64_to_cpu(data[2]), le64_to_cpu(data[3]),  in ___siphash_aligned()
71 				    key);  in ___siphash_aligned()
72 	return __siphash_aligned(data, len, key);  in ___siphash_aligned()
76  * siphash - compute 64-bit siphash PRF value
79  * @key: the siphash key
82 			  const siphash_key_t *key)  in siphash()  argument
86 		return __siphash_unaligned(data, len, key);  in siphash()
87 	return ___siphash_aligned(data, len, key);  in siphash()
92 	unsigned long key[2];  member
96 		       const hsiphash_key_t *key);
98 			 const hsiphash_key_t *key);
100 u32 hsiphash_1u32(const u32 a, const hsiphash_key_t *key);
101 u32 hsiphash_2u32(const u32 a, const u32 b, const hsiphash_key_t *key);
103 		  const hsiphash_key_t *key);
105 		  const hsiphash_key_t *key);
108 				      const hsiphash_key_t *key)  in ___hsiphash_aligned()  argument
111 		return hsiphash_1u32(le32_to_cpu(data[0]), key);  in ___hsiphash_aligned()
114 				     key);  in ___hsiphash_aligned()
117 				     le32_to_cpu(data[2]), key);  in ___hsiphash_aligned()
120 				     le32_to_cpu(data[2]), le32_to_cpu(data[3]),  in ___hsiphash_aligned()
121 				     key);  in ___hsiphash_aligned()
122 	return __hsiphash_aligned(data, len, key);  in ___hsiphash_aligned()
126  * hsiphash - compute 32-bit hsiphash PRF value
129  * @key: the hsiphash key
132 			   const hsiphash_key_t *key)  in hsiphash()  argument
136 		return __hsiphash_unaligned(data, len, key);  in hsiphash()
137 	return ___hsiphash_aligned(data, len, key);  in hsiphash()