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<?php $textToEncrypt = "Secret Text to Encrypt"; $encryptionMethod = 'aes-256-cbc'; $secretHash = "315a5504d921f8327f73a356d2bbcbf1"; // <---- you have to use some persistent. $iv_size = openssl_cipher_iv_length($encryptionMethod ); $iv = openssl_random_pseudo_bytes($iv_size); //To encrypt $encryptedMessage = openssl_encrypt($textToEncrypt, $encryptionMethod, $secretHash, 0, $iv); //Concatenate iv with data $encryptedMessageWithIv = bin2hex($iv) . $encryptedMessage; //To Decrypt $iv_size = openssl_cipher_iv_length($encryptionMethod ); $iv = hex2bin(substr($encryptedMessageWithIv, 0, $iv_size*2)); $decryptedMessage = openssl_decrypt(substr($encryptedMessageWithIv, $iv_size*2), $encryptionMethod, $secretHash, 0, $iv); echo "Encrypted: $encryptedMessageWithIv <br>Decrypted: $decryptedMessage";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/r9pYv
function name:  (null)
number of ops:  57
compiled vars:  !0 = $textToEncrypt, !1 = $encryptionMethod, !2 = $secretHash, !3 = $iv_size, !4 = $iv, !5 = $encryptedMessage, !6 = $encryptedMessageWithIv, !7 = $decryptedMessage
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'Secret+Text+to+Encrypt'
    4     1        ASSIGN                                                   !1, 'aes-256-cbc'
    5     2        ASSIGN                                                   !2, '315a5504d921f8327f73a356d2bbcbf1'
    7     3        INIT_FCALL_BY_NAME                                       'openssl_cipher_iv_length'
          4        SEND_VAR_EX                                              !1
          5        DO_FCALL                                      0  $11     
          6        ASSIGN                                                   !3, $11
    8     7        INIT_FCALL_BY_NAME                                       'openssl_random_pseudo_bytes'
          8        SEND_VAR_EX                                              !3
          9        DO_FCALL                                      0  $13     
         10        ASSIGN                                                   !4, $13
   11    11        INIT_FCALL_BY_NAME                                       'openssl_encrypt'
         12        SEND_VAR_EX                                              !0
         13        SEND_VAR_EX                                              !1
         14        SEND_VAR_EX                                              !2
         15        SEND_VAL_EX                                              0
         16        SEND_VAR_EX                                              !4
         17        DO_FCALL                                      0  $15     
         18        ASSIGN                                                   !5, $15
   14    19        INIT_FCALL                                               'bin2hex'
         20        SEND_VAR                                                 !4
         21        DO_ICALL                                         $17     
         22        CONCAT                                           ~18     $17, !5
         23        ASSIGN                                                   !6, ~18
   17    24        INIT_FCALL_BY_NAME                                       'openssl_cipher_iv_length'
         25        SEND_VAR_EX                                              !1
         26        DO_FCALL                                      0  $20     
         27        ASSIGN                                                   !3, $20
   18    28        INIT_FCALL                                               'hex2bin'
         29        INIT_FCALL                                               'substr'
         30        SEND_VAR                                                 !6
         31        SEND_VAL                                                 0
         32        MUL                                              ~22     !3, 2
         33        SEND_VAL                                                 ~22
         34        DO_ICALL                                         $23     
         35        SEND_VAR                                                 $23
         36        DO_ICALL                                         $24     
         37        ASSIGN                                                   !4, $24
   20    38        INIT_FCALL_BY_NAME                                       'openssl_decrypt'
         39        INIT_FCALL                                               'substr'
         40        SEND_VAR                                                 !6
         41        MUL                                              ~26     !3, 2
         42        SEND_VAL                                                 ~26
         43        DO_ICALL                                         $27     
         44        SEND_VAR_NO_REF_EX                                       $27
         45        SEND_VAR_EX                                              !1
         46        SEND_VAR_EX                                              !2
         47        SEND_VAL_EX                                              0
         48        SEND_VAR_EX                                              !4
         49        DO_FCALL                                      0  $28     
         50        ASSIGN                                                   !7, $28
   22    51        ROPE_INIT                                     4  ~31     'Encrypted%3A+'
         52        ROPE_ADD                                      1  ~31     ~31, !6
         53        ROPE_ADD                                      2  ~31     ~31, '+%3Cbr%3EDecrypted%3A+'
         54        ROPE_END                                      3  ~30     ~31, !7
         55        ECHO                                                     ~30
         56      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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