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<?php /* * Fill in all five below and click the blue 'eval();' button. * ------------------ */ $numberOfCase = 3; $unhashedServerSeed = 'ec385c144f6ecc715adf3e96ccadda4245f4aeaec75fcd6240a95abe6c2b22f7'; $nonce = 1; $clientSeed = '1'; $qty = 1; /* ------------------ */ if ($numberOfCase < 0 || $unhashedServerSeed == '' || $nonce < 0 || $clientSeed == '' || $qty <= 0) { echo "Fill in details"; return; } define('MAX_HEX_SEGMENTS', 6); define('HEX_SEGMENT_SIZE', 2); define('BASE_FOR_HEX_CONVERSION', 256); define('HASH_TYPE', 'sha256'); function calculateDecimalValue(string $preResult): float { $decimalValue = 0; for ($i = 0; $i < MAX_HEX_SEGMENTS; $i++) { $hexValue = substr($preResult, HEX_SEGMENT_SIZE * $i, HEX_SEGMENT_SIZE); $decimalValue += hexdec($hexValue) / pow(BASE_FOR_HEX_CONVERSION, $i + 1); } return $decimalValue; } function getProvablyFairResult(string $init, string $serverSeed, int $qty): array { $preResult = hash_hmac(HASH_TYPE, $init, $serverSeed); $decimalValue = calculateDecimalValue($preResult); $result = (int) ($decimalValue * $qty) + 1; return [ 'preResult' => $preResult, 'result' => $result, ]; } $unhashedServerSeed = preg_replace( "/\r|\n/", "", $unhashedServerSeed); $clientSeed = preg_replace( "/\r|\n/", "", $clientSeed); $stringToHash = "$clientSeed-$numberOfCase-$nonce"; $result = getProvablyFairResult($stringToHash, $unhashedServerSeed, $qty); echo "Result: {$result['result']}";
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 47) Position 1 = 7, Position 2 = 9
Branch analysis from position: 7
2 jumps found. (Code = 47) Position 1 = 10, Position 2 = 12
Branch analysis from position: 10
2 jumps found. (Code = 47) Position 1 = 13, Position 2 = 15
Branch analysis from position: 13
2 jumps found. (Code = 47) Position 1 = 16, Position 2 = 18
Branch analysis from position: 16
2 jumps found. (Code = 43) Position 1 = 19, Position 2 = 21
Branch analysis from position: 19
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 21
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 18
Branch analysis from position: 15
Branch analysis from position: 12
Branch analysis from position: 9
filename:       /in/dUj8K
function name:  (null)
number of ops:  60
compiled vars:  !0 = $numberOfCase, !1 = $unhashedServerSeed, !2 = $nonce, !3 = $clientSeed, !4 = $qty, !5 = $stringToHash, !6 = $result
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    6     0  E >   ASSIGN                                                       !0, 3
    7     1        ASSIGN                                                       !1, 'ec385c144f6ecc715adf3e96ccadda4245f4aeaec75fcd6240a95abe6c2b22f7'
    8     2        ASSIGN                                                       !2, 1
    9     3        ASSIGN                                                       !3, '1'
   10     4        ASSIGN                                                       !4, 1
   14     5        IS_SMALLER                                           ~12     !0, 0
          6      > JMPNZ_EX                                             ~12     ~12, ->9
          7    >   IS_EQUAL                                             ~13     !1, ''
          8        BOOL                                                 ~12     ~13
          9    > > JMPNZ_EX                                             ~12     ~12, ->12
         10    >   IS_SMALLER                                           ~14     !2, 0
         11        BOOL                                                 ~12     ~14
         12    > > JMPNZ_EX                                             ~12     ~12, ->15
         13    >   IS_EQUAL                                             ~15     !3, ''
         14        BOOL                                                 ~12     ~15
         15    > > JMPNZ_EX                                             ~12     ~12, ->18
         16    >   IS_SMALLER_OR_EQUAL                                  ~16     !4, 0
         17        BOOL                                                 ~12     ~16
         18    > > JMPZ                                                         ~12, ->21
   15    19    >   ECHO                                                         'Fill+in+details'
   16    20      > RETURN                                                       null
   19    21    >   INIT_FCALL                                                   'define'
         22        SEND_VAL                                                     'MAX_HEX_SEGMENTS'
         23        SEND_VAL                                                     6
         24        DO_ICALL                                                     
   20    25        INIT_FCALL                                                   'define'
         26        SEND_VAL                                                     'HEX_SEGMENT_SIZE'
         27        SEND_VAL                                                     2
         28        DO_ICALL                                                     
   21    29        INIT_FCALL                                                   'define'
         30        SEND_VAL                                                     'BASE_FOR_HEX_CONVERSION'
         31        SEND_VAL                                                     256
         32        DO_ICALL                                                     
   22    33        INIT_FCALL                                                   'define'
         34        SEND_VAL                                                     'HASH_TYPE'
         35        SEND_VAL                                                     'sha256'
         36        DO_ICALL                                                     
   45    37        FRAMELESS_ICALL_3                preg_replace        ~21     '%2F%0D%7C%0A%2F', ''
         38        OP_DATA                                                      !1
         39        ASSIGN                                                       !1, ~21
   46    40        FRAMELESS_ICALL_3                preg_replace        ~23     '%2F%0D%7C%0A%2F', ''
         41        OP_DATA                                                      !3
         42        ASSIGN                                                       !3, ~23
   47    43        ROPE_INIT                                         5  ~26     !3
         44        ROPE_ADD                                          1  ~26     ~26, '-'
         45        ROPE_ADD                                          2  ~26     ~26, !0
         46        ROPE_ADD                                          3  ~26     ~26, '-'
         47        ROPE_END                                          4  ~25     ~26, !2
         48        ASSIGN                                                       !5, ~25
   49    49        INIT_FCALL                                                   'getprovablyfairresult'
         50        SEND_VAR                                                     !5
         51        SEND_VAR                                                     !1
         52        SEND_VAR                                                     !4
         53        DO_FCALL                                          0  $30     
         54        ASSIGN                                                       !6, $30
   51    55        NOP                                                          
         56        FETCH_DIM_R                                          ~32     !6, 'result'
         57        FAST_CONCAT                                          ~33     'Result%3A+', ~32
         58        ECHO                                                         ~33
         59      > RETURN                                                       1

Function calculatedecimalvalue:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 22
Branch analysis from position: 22
2 jumps found. (Code = 44) Position 1 = 25, Position 2 = 4
Branch analysis from position: 25
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 4
2 jumps found. (Code = 44) Position 1 = 25, Position 2 = 4
Branch analysis from position: 25
Branch analysis from position: 4
filename:       /in/dUj8K
function name:  calculateDecimalValue
number of ops:  29
compiled vars:  !0 = $preResult, !1 = $decimalValue, !2 = $i, !3 = $hexValue
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   24     0  E >   RECV                                                 !0      
   26     1        ASSIGN                                                       !1, 0
   27     2        ASSIGN                                                       !2, 0
          3      > JMP                                                          ->22
   28     4    >   FETCH_CONSTANT                                       ~6      'HEX_SEGMENT_SIZE'
          5        MUL                                                  ~7      !2, ~6
          6        FETCH_CONSTANT                                       ~8      'HEX_SEGMENT_SIZE'
          7        FRAMELESS_ICALL_3                substr              ~9      !0, ~7
          8        OP_DATA                                                      ~8
          9        ASSIGN                                                       !3, ~9
   29    10        INIT_FCALL                                                   'hexdec'
         11        SEND_VAR                                                     !3
         12        DO_ICALL                                             $11     
         13        INIT_FCALL                                                   'pow'
         14        FETCH_CONSTANT                                       ~12     'BASE_FOR_HEX_CONVERSION'
         15        SEND_VAL                                                     ~12
         16        ADD                                                  ~13     !2, 1
         17        SEND_VAL                                                     ~13
         18        DO_ICALL                                             $14     
         19        DIV                                                  ~15     $11, $14
         20        ASSIGN_OP                                         1          !1, ~15
   27    21        PRE_INC                                                      !2
         22    >   FETCH_CONSTANT                                       ~18     'MAX_HEX_SEGMENTS'
         23        IS_SMALLER                                                   !2, ~18
         24      > JMPNZ                                                        ~19, ->4
   31    25    >   VERIFY_RETURN_TYPE                                           !1
         26      > RETURN                                                       !1
   32    27*       VERIFY_RETURN_TYPE                                           
         28*     > RETURN                                                       null

End of function calculatedecimalvalue

Function getprovablyfairresult:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/dUj8K
function name:  getProvablyFairResult
number of ops:  24
compiled vars:  !0 = $init, !1 = $serverSeed, !2 = $qty, !3 = $preResult, !4 = $decimalValue, !5 = $result
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   34     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
          2        RECV                                                 !2      
   36     3        INIT_FCALL                                                   'hash_hmac'
          4        FETCH_CONSTANT                                       ~6      'HASH_TYPE'
          5        SEND_VAL                                                     ~6
          6        SEND_VAR                                                     !0
          7        SEND_VAR                                                     !1
          8        DO_ICALL                                             $7      
          9        ASSIGN                                                       !3, $7
   37    10        INIT_FCALL                                                   'calculatedecimalvalue'
         11        SEND_VAR                                                     !3
         12        DO_FCALL                                          0  $9      
         13        ASSIGN                                                       !4, $9
   38    14        MUL                                                  ~11     !4, !2
         15        CAST                                              4  ~12     ~11
         16        ADD                                                  ~13     ~12, 1
         17        ASSIGN                                                       !5, ~13
   40    18        INIT_ARRAY                                           ~15     !3, 'preResult'
   41    19        ADD_ARRAY_ELEMENT                                    ~15     !5, 'result'
         20        VERIFY_RETURN_TYPE                                           ~15
         21      > RETURN                                                       ~15
   43    22*       VERIFY_RETURN_TYPE                                           
         23*     > RETURN                                                       null

End of function getprovablyfairresult

Generated using Vulcan Logic Dumper, using php 8.5.0


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