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| Current Path : /lib64/perl5/CORE/ |
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| Current File : //lib64/perl5/CORE/hv_func.h |
/* 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_STADTX) \
|| defined(PERL_HASH_FUNC_ZAPHOD32) \
)
# ifdef CAN64BITHASH
# define PERL_HASH_FUNC_STADTX
# 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_SEED_BYTES 16
# define __PERL_HASH_STATE_BYTES 32
# 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_SEED_BYTES 16
# define __PERL_HASH_STATE_BYTES 32
# 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_STADTX)
# define __PERL_HASH_FUNC "STADTX"
# define __PERL_HASH_SEED_BYTES 16
# define __PERL_HASH_STATE_BYTES 32
# define __PERL_HASH_SEED_STATE(seed,state) stadtx_seed_state(seed,state)
# define __PERL_HASH_WITH_STATE(state,str,len) (U32)stadtx_hash_with_state((state),(U8*)(str),(len))
# include "stadtx_hash.h"
#elif defined(PERL_HASH_FUNC_ZAPHOD32)
# define __PERL_HASH_FUNC "ZAPHOD32"
# define __PERL_HASH_SEED_BYTES 12
# define __PERL_HASH_STATE_BYTES 12
# 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
#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
#define _PERL_HASH_SEED_BYTES ( __PERL_HASH_SEED_BYTES + (int)( 3 * 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_state96(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
PERL_STATIC_INLINE
U32 S_perl_hash_with_seed(const U8 * const seed, const U8 * const str, const STRLEN len)
{
U8 state[_PERL_HASH_STATE_BYTES];
_PERL_HASH_SEED_STATE(seed,state);
return _PERL_HASH_WITH_STATE(state,str,len);
}
#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_BYTES
#define PERL_HASH_STATE_BYTES _PERL_HASH_STATE_BYTES
#define PERL_HASH_FUNC _PERL_HASH_FUNC
#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
/* This is SipHash by Jean-Philippe Aumasson and Daniel J. Bernstein.
* The authors claim it is relatively secure compared to the alternatives
* and that performance wise it is a suitable hash for languages like Perl.
* See:
*
* https://www.131002.net/siphash/
*
* This implementation seems to perform slightly slower than one-at-a-time for
* short keys, but degrades slower for longer keys. Murmur Hash outperforms it
* regardless of keys size.
*
* It is 64 bit only.
*/
#ifdef CAN64BITHASH
#define SIPROUND \
STMT_START { \
v0 += v1; v1=ROTL64(v1,13); v1 ^= v0; v0=ROTL64(v0,32); \
v2 += v3; v3=ROTL64(v3,16); v3 ^= v2; \
v0 += v3; v3=ROTL64(v3,21); v3 ^= v0; \
v2 += v1; v1=ROTL64(v1,17); v1 ^= v2; v2=ROTL64(v2,32); \
} STMT_END
#define SIPHASH_SEED_STATE(key,v0,v1,v2,v3) \
do { \
v0 = v2 = U8TO64_LE(key + 0); \
v1 = v3 = U8TO64_LE(key + 8); \
/* "somepseudorandomlygeneratedbytes" */ \
v0 ^= UINT64_C(0x736f6d6570736575); \
v1 ^= UINT64_C(0x646f72616e646f6d); \
v2 ^= UINT64_C(0x6c7967656e657261); \
v3 ^= UINT64_C(0x7465646279746573); \
} while (0)
PERL_STATIC_INLINE
void S_perl_siphash_seed_state(const unsigned char * const seed_buf, unsigned char * state_buf) {
U64 *v= (U64*) state_buf;
SIPHASH_SEED_STATE(seed_buf, v[0],v[1],v[2],v[3]);
}
#define PERL_SIPHASH_FNC(FNC,SIP_ROUNDS,SIP_FINAL_ROUNDS) \
PERL_STATIC_INLINE U64 \
FNC ## _with_state_64 \
(const unsigned char * const state, const unsigned char *in, const STRLEN inlen) \
{ \
const int left = inlen & 7; \
const U8 *end = in + inlen - left; \
\
U64 b = ( ( U64 )(inlen) ) << 56; \
U64 m; \
U64 v0 = U8TO64_LE(state); \
U64 v1 = U8TO64_LE(state+8); \
U64 v2 = U8TO64_LE(state+16); \
U64 v3 = U8TO64_LE(state+24); \
\
for ( ; in != end; in += 8 ) \
{ \
m = U8TO64_LE( in ); \
v3 ^= m; \
\
SIP_ROUNDS; \
\
v0 ^= m; \
} \
\
switch( left ) \
{ \
case 7: b |= ( ( U64 )in[ 6] ) << 48; /*FALLTHROUGH*/ \
case 6: b |= ( ( U64 )in[ 5] ) << 40; /*FALLTHROUGH*/ \
case 5: b |= ( ( U64 )in[ 4] ) << 32; /*FALLTHROUGH*/ \
case 4: b |= ( ( U64 )in[ 3] ) << 24; /*FALLTHROUGH*/ \
case 3: b |= ( ( U64 )in[ 2] ) << 16; /*FALLTHROUGH*/ \
case 2: b |= ( ( U64 )in[ 1] ) << 8; /*FALLTHROUGH*/ \
case 1: b |= ( ( U64 )in[ 0] ); break; \
case 0: break; \
} \
\
v3 ^= b; \
\
SIP_ROUNDS; \
\
v0 ^= b; \
\
v2 ^= 0xff; \
\
SIP_FINAL_ROUNDS \
\
b = v0 ^ v1 ^ v2 ^ v3; \
return b; \
} \
\
PERL_STATIC_INLINE U32 \
FNC ## _with_state \
(const unsigned char * const state, const unsigned char *in, const STRLEN inlen) \
{ \
union { \
U64 h64; \
U32 h32[2]; \
} h; \
h.h64= FNC ## _with_state_64(state,in,inlen); \
return h.h32[0] ^ h.h32[1]; \
} \
\
\
PERL_STATIC_INLINE U32 \
FNC (const unsigned char * const seed, const unsigned char *in, const STRLEN inlen) \
{ \
U64 state[4]; \
SIPHASH_SEED_STATE(seed,state[0],state[1],state[2],state[3]); \
return FNC ## _with_state((U8*)state,in,inlen); \
}
PERL_SIPHASH_FNC(
S_perl_hash_siphash_1_3
,SIPROUND;
,SIPROUND;SIPROUND;SIPROUND;
)
PERL_SIPHASH_FNC(
S_perl_hash_siphash_2_4
,SIPROUND;SIPROUND;
,SIPROUND;SIPROUND;SIPROUND;SIPROUND;
)
#endif /* defined(CAN64BITHASH) */
#endif /*compile once*/
/*
* ex: set ts=8 sts=4 sw=4 et:
*/
Mr. DellatioNx196 GaLers xh3LL Backd00r 1.0, Coded By Mr. DellatioNx196 - Bogor BlackHat