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<?php $signData = 'asfl;sdkg;dlk;43t3k4ntj3n4tk34tb3jht3jktb3hj4bt34khgkj34;g34gkjd'; $hmacKey = '346456455675674674674683451324124124324'; $merchantSig = base64_encode(hash_hmac('sha256',$signData,pack("H*" , $hmacKey),true)); echo "PHP with Packing\n"; echo $merchantSig . "\n"; echo "==========\n"; $merchantSig = base64_encode(hash_hmac('sha256',$signData,$hmacKey,true)); echo "PHP without Packing\n"; echo $merchantSig . "\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/JKdNk
function name:  (null)
number of ops:  34
compiled vars:  !0 = $signData, !1 = $hmacKey, !2 = $merchantSig
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'asfl%3Bsdkg%3Bdlk%3B43t3k4ntj3n4tk34tb3jht3jktb3hj4bt34khgkj34%3Bg34gkjd'
    4     1        ASSIGN                                                   !1, '346456455675674674674683451324124124324'
    6     2        INIT_FCALL                                               'base64_encode'
          3        INIT_FCALL                                               'hash_hmac'
          4        SEND_VAL                                                 'sha256'
          5        SEND_VAR                                                 !0
          6        INIT_FCALL                                               'pack'
          7        SEND_VAL                                                 'H%2A'
          8        SEND_VAR                                                 !1
          9        DO_ICALL                                         $5      
         10        SEND_VAR                                                 $5
         11        SEND_VAL                                                 <true>
         12        DO_ICALL                                         $6      
         13        SEND_VAR                                                 $6
         14        DO_ICALL                                         $7      
         15        ASSIGN                                                   !2, $7
    7    16        ECHO                                                     'PHP+with+Packing%0A'
    8    17        CONCAT                                           ~9      !2, '%0A'
         18        ECHO                                                     ~9
    9    19        ECHO                                                     '%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%0A'
   10    20        INIT_FCALL                                               'base64_encode'
         21        INIT_FCALL                                               'hash_hmac'
         22        SEND_VAL                                                 'sha256'
         23        SEND_VAR                                                 !0
         24        SEND_VAR                                                 !1
         25        SEND_VAL                                                 <true>
         26        DO_ICALL                                         $10     
         27        SEND_VAR                                                 $10
         28        DO_ICALL                                         $11     
         29        ASSIGN                                                   !2, $11
   11    30        ECHO                                                     'PHP+without+Packing%0A'
   12    31        CONCAT                                           ~13     !2, '%0A'
         32        ECHO                                                     ~13
         33      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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