FM / CORE

/usr/lib64/perl5/CORE

Name	Size	Mode	Actions
av.h	3353	0644	edit dl rm
bitcount.h	850	0644	edit dl rm
charclass_invlists.h	4353511	0644	edit dl rm
config.h	164367	0644	edit dl rm
cop.h	41997	0644	edit dl rm
cv.h	12332	0644	edit dl rm
dosish.h	5424	0644	edit dl rm
ebcdic_tables.h	49763	0644	edit dl rm
embed.h	101237	0644	edit dl rm
embedvar.h	21833	0644	edit dl rm
EXTERN.h	1630	0644	edit dl rm
fakesdio.h	3210	0644	edit dl rm
feature.h	11054	0644	edit dl rm
form.h	1463	0644	edit dl rm
git_version.h	357	0644	edit dl rm
gv.h	10711	0644	edit dl rm
handy.h	129760	0644	edit dl rm
hv.h	25593	0644	edit dl rm
hv_func.h	11530	0644	edit dl rm
hv_macro.h	3109	0644	edit dl rm
inline.h	74744	0644	edit dl rm
INTERN.h	1309	0644	edit dl rm
intrpvar.h	32227	0644	edit dl rm
invlist_inline.h	7429	0644	edit dl rm
iperlsys.h	49392	0644	edit dl rm
keywords.h	6609	0644	edit dl rm
l1_char_class_tab.h	122512	0644	edit dl rm
libperl.so	3728944	0755	edit dl rm
malloc_ctl.h	1524	0644	edit dl rm
metaconfig.h	692	0644	edit dl rm
mg.h	3013	0644	edit dl rm
mg_data.h	5021	0644	edit dl rm
mg_raw.h	4377	0644	edit dl rm
mg_vtable.h	9562	0644	edit dl rm
mydtrace.h	1693	0644	edit dl rm
nostdio.h	3392	0644	edit dl rm
op.h	38248	0644	edit dl rm
opcode.h	93928	0644	edit dl rm
opnames.h	8927	0644	edit dl rm
op_reg_common.h	5911	0644	edit dl rm
overload.h	3276	0644	edit dl rm
pad.h	17232	0644	edit dl rm
parser.h	6993	0644	edit dl rm
patchlevel.h	9179	0644	edit dl rm
perl.h	283567	0644	edit dl rm
perlapi.h	7680	0644	edit dl rm
perldtrace.h	3301	0644	edit dl rm
perlio.h	9555	0644	edit dl rm
perliol.h	13761	0644	edit dl rm
perlsdio.h	527	0644	edit dl rm
perlvars.h	12934	0644	edit dl rm
perly.h	4689	0644	edit dl rm
perl_inc_macro.h	6223	0644	edit dl rm
perl_langinfo.h	2914	0644	edit dl rm
pp.h	28981	0644	edit dl rm
pp_proto.h	12067	0644	edit dl rm
proto.h	277502	0644	edit dl rm
reentr.h	86639	0644	edit dl rm
regcharclass.h	167748	0644	edit dl rm
regcomp.h	53054	0644	edit dl rm
regexp.h	36609	0644	edit dl rm
regnodes.h	40350	0644	edit dl rm
sbox32_hash.h	57294	0644	edit dl rm
scope.h	11893	0644	edit dl rm
stadtx_hash.h	9221	0644	edit dl rm
sv.h	88899	0644	edit dl rm
thread.h	12095	0644	edit dl rm
time64.h	1168	0644	edit dl rm
time64_config.h	2048	0644	edit dl rm
uconfig.h	163922	0644	edit dl rm
unicode_constants.h	8031	0644	edit dl rm
unixish.h	5269	0644	edit dl rm
uni_keywords.h	554711	0644	edit dl rm
utf8.h	50431	0644	edit dl rm
utfebcdic.h	65636	0644	edit dl rm
util.h	10575	0644	edit dl rm
uudmap.h	904	0644	edit dl rm
vutil.h	7993	0644	edit dl rm
warnings.h	11464	0644	edit dl rm
XSUB.h	24607	0644	edit dl rm
zaphod32_hash.h	9658	0644	edit dl rm

Edit: /usr/lib64/perl5/CORE/hv_func.h (11530B)

/* 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:
 */

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