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10.10.2008 at 06:24AM PDT, ID: 23804030
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8.1

Decrypt PL/SQL DESEncrypted String in Java

Asked by priyaaaank in Oracle Database, Java Programming Language

Tags:

Hi all,

I am  trying to decrypt a string in Java Code which was encrypted using DBMS_OBFUSCATION_TOOLKIT in Oracle PL/SQL procedure.

Byte Key used in Java code is of format:
SecretKeySpec key = new SecretKeySpec(new byte[] { 1, 2, 3, 4, 5, 6, 7,
                        8, 9, 10 }, "DESede")
IV is as follows in Java;
byte[] initVector = { 8, 7, 6, 5, 4, 3, 2, 1 };

The values decrypted/encrypted are not same. I know I am making some goof up while using byte arrays in Oracle. Could you please either point me to an explanation as to how byte array keys should be used in PL/SQL or what is the best way to go about the encryption/decryption.

Please do let me know if additional info is requiered.

ThanksStart Free Trial 
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CREATE OR REPLACE PROCEDURE testharidecrypt AS
 
BEGIN
 
   DECLARE
 
      l_key_vc    VARCHAR2 (40)  := '123456789a'; //hexadecimal values Key
 
      l_iv_vc     VARCHAR2 (8)   := '87654321'; 
 
      str         VARCHAR (2000) := 'somelogin';//string to be decrypted
 
      crypt_raw   RAW (2000);
 
      crypt_str   VARCHAR (2000);
 
      l           INTEGER        := LENGTH (str);
 
      i           INTEGER;
 
      padblock    RAW (2000);
 
   BEGIN
 
      l_key_vc := HEXTORAW (l_key_vc);
 
      l_iv_vc := HEXTORAW (l_iv_vc);
 
      i := 8 - MOD (l, 8);
 
      DBMS_OUTPUT.put_line ('i: ' || i);
 
      padblock := UTL_RAW.cast_to_raw (str || RPAD (CHR (i), i, CHR (i)));
 
      DBMS_OUTPUT.put_line ('str: ' || str);
 
      DBMS_OUTPUT.put_line ('padblock: ' || padblock);
 
      DBMS_OBFUSCATION_TOOLKIT.des3encrypt
 
                               (input_string          => padblock,
 
                                key_string            => l_key_vc,
 
                                which                 => DBMS_OBFUSCATION_TOOLKIT.twokeymode,
 
                                iv_string             => l_iv_vc,
 
                                encrypted_string      => crypt_raw
 
                               );
 
--     crypt_str := UTL_RAW.cast_to_varchar2 (crypt_str);
 
      DBMS_OUTPUT.put_line ('Encrypted String:' || crypt_raw);
 
--      l := LENGTH (crypt_str);
 
  --    crypt_str := RPAD (crypt_str, l - ASCII (SUBSTR (crypt_str, l)));
 
      DBMS_OUTPUT.put_line ('Encrypted String:' || crypt_raw);
 
   END;
 
END;
[+][-]10.10.2008 at 08:25AM PDT, ID: 22687659

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About this solution

Zones: Oracle Database, Java Programming Language
Tags: Oracle, Java
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Solution Provided By: schwertner
Participating Experts: 1
Solution Grade: B
 
 
 
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