1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/* hash a key
*--------------------------------------------------------------------------------------
* The "hash seed" feature was added in Perl 5.8.1 to perturb the results
* to avoid "algorithmic complexity attacks".
*
* If USE_HASH_SEED is defined, hash randomisation is done by default
* (see also perl.c:perl_parse() and S_init_tls_and_interp() and util.c:get_hash_seed())
*/
#ifndef PERL_SEEN_HV_FUNC_H_ /* compile once */
#define PERL_SEEN_HV_FUNC_H_
#include "hv_macro.h"
#if !( 0 \
|| defined(PERL_HASH_FUNC_SIPHASH) \
|| defined(PERL_HASH_FUNC_SIPHASH13) \
|| defined(PERL_HASH_FUNC_ZAPHOD32) \
)
# ifdef CAN64BITHASH
# define PERL_HASH_FUNC_SIPHASH13
# else
# define PERL_HASH_FUNC_ZAPHOD32
# endif
#endif
#ifndef PERL_HASH_USE_SBOX32_ALSO
#define PERL_HASH_USE_SBOX32_ALSO 1
#endif
#ifndef SBOX32_MAX_LEN
#define SBOX32_MAX_LEN 24
#endif
/* this must be after the SBOX32_MAX_LEN define */
#include "sbox32_hash.h"
#if defined(PERL_HASH_FUNC_SIPHASH)
# define __PERL_HASH_FUNC "SIPHASH_2_4"
# define __PERL_HASH_WORD_TYPE U64
# define __PERL_HASH_WORD_SIZE sizeof(__PERL_HASH_WORD_TYPE)
# define __PERL_HASH_SEED_BYTES (__PERL_HASH_WORD_SIZE * 2)
# define __PERL_HASH_STATE_BYTES (__PERL_HASH_WORD_SIZE * 4)
# define __PERL_HASH_SEED_STATE(seed,state) S_perl_siphash_seed_state(seed,state)
# define __PERL_HASH_WITH_STATE(state,str,len) S_perl_hash_siphash_2_4_with_state((state),(U8*)(str),(len))
#elif defined(PERL_HASH_FUNC_SIPHASH13)
# define __PERL_HASH_FUNC "SIPHASH_1_3"
# define __PERL_HASH_WORD_TYPE U64
# define __PERL_HASH_WORD_SIZE sizeof(__PERL_HASH_WORD_TYPE)
# define __PERL_HASH_SEED_BYTES (__PERL_HASH_WORD_SIZE * 2)
# define __PERL_HASH_STATE_BYTES (__PERL_HASH_WORD_SIZE * 4)
# define __PERL_HASH_SEED_STATE(seed,state) S_perl_siphash_seed_state(seed,state)
# define __PERL_HASH_WITH_STATE(state,str,len) S_perl_hash_siphash_1_3_with_state((state),(U8*)(str),(len))
#elif defined(PERL_HASH_FUNC_ZAPHOD32)
# define __PERL_HASH_FUNC "ZAPHOD32"
# define __PERL_HASH_WORD_TYPE U32
# define __PERL_HASH_WORD_SIZE sizeof(__PERL_HASH_WORD_TYPE)
# define __PERL_HASH_SEED_BYTES (__PERL_HASH_WORD_SIZE * 3)
# define __PERL_HASH_STATE_BYTES (__PERL_HASH_WORD_SIZE * 3)
# define __PERL_HASH_SEED_STATE(seed,state) zaphod32_seed_state(seed,state)
# define __PERL_HASH_WITH_STATE(state,str,len) (U32)zaphod32_hash_with_state((state),(U8*)(str),(len))
# include "zaphod32_hash.h"
#endif
#ifndef __PERL_HASH_WITH_STATE
#error "No hash function defined!"
#endif
#ifndef __PERL_HASH_SEED_BYTES
#error "__PERL_HASH_SEED_BYTES not defined"
#endif
#ifndef __PERL_HASH_FUNC
#error "__PERL_HASH_FUNC not defined"
#endif
/* Some siphash static functions are needed by XS::APItest even when
siphash isn't the current hash. For SipHash builds this needs to
be before the S_perl_hash_with_seed() definition.
*/
#include "perl_siphash.h"
#define __PERL_HASH_SEED_roundup(x, y) ( ( ( (x) + ( (y) - 1 ) ) / (y) ) * (y) )
#define _PERL_HASH_SEED_roundup(x) __PERL_HASH_SEED_roundup(x,__PERL_HASH_WORD_SIZE)
#define PL_hash_seed ((U8 *)PL_hash_seed_w)
#define PL_hash_state ((U8 *)PL_hash_state_w)
#if PERL_HASH_USE_SBOX32_ALSO != 1
# define _PERL_HASH_FUNC __PERL_HASH_FUNC
# define _PERL_HASH_SEED_BYTES __PERL_HASH_SEED_BYTES
# define _PERL_HASH_STATE_BYTES __PERL_HASH_STATE_BYTES
# define _PERL_HASH_SEED_STATE(seed,state) __PERL_HASH_SEED_STATE(seed,state)
# define _PERL_HASH_WITH_STATE(state,str,len) __PERL_HASH_WITH_STATE(state,str,len)
#else
#define _PERL_HASH_FUNC "SBOX32_WITH_" __PERL_HASH_FUNC
/* note the 4 in the below code comes from the fact the seed to initialize the SBOX is 128 bits */
#define _PERL_HASH_SEED_BYTES ( __PERL_HASH_SEED_BYTES + (int)( 4 * sizeof(U32)) )
#define _PERL_HASH_STATE_BYTES \
( __PERL_HASH_STATE_BYTES + ( ( 1 + ( 256 * SBOX32_MAX_LEN ) ) * sizeof(U32) ) )
#define _PERL_HASH_SEED_STATE(seed,state) STMT_START { \
__PERL_HASH_SEED_STATE(seed,state); \
sbox32_seed_state128(seed + __PERL_HASH_SEED_BYTES, state + __PERL_HASH_STATE_BYTES); \
} STMT_END
#define _PERL_HASH_WITH_STATE(state,str,len) \
(LIKELY(len <= SBOX32_MAX_LEN) \
? sbox32_hash_with_state((state + __PERL_HASH_STATE_BYTES),(U8*)(str),(len)) \
: __PERL_HASH_WITH_STATE((state),(str),(len)))
#endif
#define PERL_HASH_WITH_SEED(seed,hash,str,len) \
(hash) = S_perl_hash_with_seed((const U8 *) seed, (const U8 *) str,len)
#define PERL_HASH_WITH_STATE(state,hash,str,len) \
(hash) = _PERL_HASH_WITH_STATE((state),(U8*)(str),(len))
#define PERL_HASH_SEED_STATE(seed,state) _PERL_HASH_SEED_STATE(seed,state)
#define PERL_HASH_SEED_BYTES _PERL_HASH_SEED_roundup(_PERL_HASH_SEED_BYTES)
#define PERL_HASH_STATE_BYTES _PERL_HASH_SEED_roundup(_PERL_HASH_STATE_BYTES)
#define PERL_HASH_FUNC _PERL_HASH_FUNC
#define PERL_HASH_SEED_WORDS (PERL_HASH_SEED_BYTES/__PERL_HASH_WORD_SIZE)
#define PERL_HASH_STATE_WORDS (PERL_HASH_STATE_BYTES/__PERL_HASH_WORD_SIZE)
#ifdef PERL_USE_SINGLE_CHAR_HASH_CACHE
#define PERL_HASH(state,str,len) \
(hash) = ((len) < 2 ? ( (len) == 0 ? PL_hash_chars[256] : PL_hash_chars[(U8)(str)[0]] ) \
: _PERL_HASH_WITH_STATE(PL_hash_state,(U8*)(str),(len)))
#else
#define PERL_HASH(hash,str,len) \
PERL_HASH_WITH_STATE(PL_hash_state,hash,(U8*)(str),(len))
#endif
/* Setup the hash seed, either we do things dynamically at start up,
* including reading from the environment, or we randomly setup the
* seed. The seed will be passed into the PERL_HASH_SEED_STATE() function
* defined for the configuration defined for this perl, which will then
* initialize whatever state it might need later in hashing. */
#ifndef PERL_HASH_SEED
# if defined(USE_HASH_SEED)
# define PERL_HASH_SEED PL_hash_seed
# else
/* this is a 512 bit seed, which should be more than enough for the
* configuration of any of our hash functions (with or without sbox).
* If you actually use a hard coded seed, you are strongly encouraged
* to replace this with something else of the correct length
* for the hash function you are using (24-32 bytes depending on build
* options). Repeat, you are *STRONGLY* encouraged not to use the value
* provided here.
*/
# define PERL_HASH_SEED \
((const U8 *)"A long string of pseudorandomly " \
"chosen bytes for hashing in Perl")
# endif
#endif
/* legacy - only mod_perl should be doing this. */
#ifdef PERL_HASH_INTERNAL_ACCESS
#define PERL_HASH_INTERNAL(hash,str,len) PERL_HASH(hash,str,len)
#endif
PERL_STATIC_INLINE U32
S_perl_hash_with_seed(const U8 * seed, const U8 *str, STRLEN len) {
__PERL_HASH_WORD_TYPE state[PERL_HASH_STATE_WORDS];
_PERL_HASH_SEED_STATE(seed,(U8*)state);
return _PERL_HASH_WITH_STATE((U8*)state,str,len);
}
#endif /*compile once*/
/*
* ex: set ts=8 sts=4 sw=4 et:
*/
|
