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<?php $tempToken = "cecf180d-800e-43ee-82b5-2b22db814d9098b3bf2a-b5bd-4800-ac75-3e29d72b6155"; $clearText = "AuthToken=cecf180d-800e-43ee-82b5-2b22db814d9098b3bf2a-b5bd-4800-ac75-3e29d72b6155&PayerId=9979571404994689&PaymentProcessType=CreditCard&ProcessMethod=None&PaymentMethodStorageOption=None&ReturnURL=https://il01addproc.propay.com:443/Return.aspx "; // Encode the TempToken string in UTF-8 $encodedTempToken = utf8_encode($tempToken); // Get the MD5 hash of $encodedTempToken in raw binary format with a length of 16 $md5Hash = md5($encodedTempToken, TRUE); // Encode the name value string in UTF-8 $encodedNameValueString = utf8_encode($clearText); // Pad the name value string using pkcs5_pad $blocksize = mcrypt_get_block_size('rijndael_128', 'cbc'); $pad = $blocksize - (strlen($encodedNameValueString) % $blocksize); $encodedNameValueString = $encodedNameValueString . str_repeat("M", $pad); echo $encodedNameValueString; // Use AES-128 encryption to encrypt the name value string with the key and IV both being equal to the MD5 hash of $encodedTempToken $aes128 = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $md5Hash, $encodedNameValueString, MCRYPT_MODE_CBC, $md5Hash); // Use Base64 encoding to send the resulting bytes of the encrypted name value string $settingsCipher = base64_encode($aes128); echo $settingsCipher;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/WKW1O
function name:  (null)
number of ops:  47
compiled vars:  !0 = $tempToken, !1 = $clearText, !2 = $encodedTempToken, !3 = $md5Hash, !4 = $encodedNameValueString, !5 = $blocksize, !6 = $pad, !7 = $aes128, !8 = $settingsCipher
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'cecf180d-800e-43ee-82b5-2b22db814d9098b3bf2a-b5bd-4800-ac75-3e29d72b6155'
    4     1        ASSIGN                                                   !1, 'AuthToken%3Dcecf180d-800e-43ee-82b5-2b22db814d9098b3bf2a-b5bd-4800-ac75-3e29d72b6155%26PayerId%3D9979571404994689%26PaymentProcessType%3DCreditCard%26ProcessMethod%3DNone%26PaymentMethodStorageOption%3DNone%26ReturnURL%3Dhttps%3A%2F%2Fil01addproc.propay.com%3A443%2FReturn.aspx%0B%0B%0B%0B%0B%0B%0B%0B%0B%0B%0B'
    7     2        INIT_FCALL                                               'utf8_encode'
          3        SEND_VAR                                                 !0
          4        DO_ICALL                                         $11     
          5        ASSIGN                                                   !2, $11
   10     6        INIT_FCALL                                               'md5'
          7        SEND_VAR                                                 !2
          8        SEND_VAL                                                 <true>
          9        DO_ICALL                                         $13     
         10        ASSIGN                                                   !3, $13
   13    11        INIT_FCALL                                               'utf8_encode'
         12        SEND_VAR                                                 !1
         13        DO_ICALL                                         $15     
         14        ASSIGN                                                   !4, $15
   16    15        INIT_FCALL_BY_NAME                                       'mcrypt_get_block_size'
         16        SEND_VAL_EX                                              'rijndael_128'
         17        SEND_VAL_EX                                              'cbc'
         18        DO_FCALL                                      0  $17     
         19        ASSIGN                                                   !5, $17
   17    20        STRLEN                                           ~19     !4
         21        MOD                                              ~20     ~19, !5
         22        SUB                                              ~21     !5, ~20
         23        ASSIGN                                                   !6, ~21
   18    24        INIT_FCALL                                               'str_repeat'
         25        SEND_VAL                                                 'M'
         26        SEND_VAR                                                 !6
         27        DO_ICALL                                         $23     
         28        CONCAT                                           ~24     !4, $23
         29        ASSIGN                                                   !4, ~24
   20    30        ECHO                                                     !4
   23    31        INIT_FCALL_BY_NAME                                       'mcrypt_encrypt'
         32        FETCH_CONSTANT                                   ~26     'MCRYPT_RIJNDAEL_128'
         33        SEND_VAL_EX                                              ~26
         34        SEND_VAR_EX                                              !3
         35        SEND_VAR_EX                                              !4
         36        FETCH_CONSTANT                                   ~27     'MCRYPT_MODE_CBC'
         37        SEND_VAL_EX                                              ~27
         38        SEND_VAR_EX                                              !3
         39        DO_FCALL                                      0  $28     
         40        ASSIGN                                                   !7, $28
   26    41        INIT_FCALL                                               'base64_encode'
         42        SEND_VAR                                                 !7
         43        DO_ICALL                                         $30     
         44        ASSIGN                                                   !8, $30
   28    45        ECHO                                                     !8
         46      > RETURN                                                   1

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