Try using for the first time - ORA-28234 dbms_crypto

Hello

I try to use dbms_crypto for the first time and I'm getting ORA-28234 key too short. I ran a separate test: P2_KEYVAL with utl_raw.length (utl_raw.cast_to_raw(:P2_KEYVAL)) et il retourne à 128 caractères, qui est ce que je pense que je suis censé pour viser pour, mais c'est tout nouveau pour moi.) Any suggestions?

Here's the code.

DECLARE
   output_string      VARCHAR2 (200);
   encrypted_raw      RAW (2048);             -- stores encrypted binary text
   decrypted_raw      RAW (2048);             -- stores decrypted binary text
   key_bytes_raw      RAW (128);              -- stores 128-bit encryption key
   encryption_type    PLS_INTEGER :=          -- total encryption type
                            DBMS_CRYPTO.ENCRYPT_AES128
                          + DBMS_CRYPTO.CHAIN_CBC
                          + DBMS_CRYPTO.PAD_PKCS5;

                    
BEGIN
     select utl_raw.cast_to_raw(rpad(:P2_KEYVAL,128,0)) into key_bytes_raw from dual;
     encrypted_raw := DBMS_CRYPTO.ENCRYPT
      (
         src => UTL_I18N.STRING_TO_RAW (:p2_INPUT,  'AL32UTF8'),
         typ => encryption_type,
         key => key_bytes_raw
      );
    -- The encrypted value "encrypted_raw" can be used here
   htp.prn ('Encrypted value: ' || encrypted_raw);
END;

ORA-28234: too short key length

A quick test shows that a 16-character password works:

DECLARE
  p2_input           varchar2(200) := 'this is a test';
  p2_keyval          varchar2(128 byte) := 'password';
  success boolean := false;
  output_string      VARCHAR2 (200);
  encrypted_raw      RAW (2048);             -- stores encrypted binary text
  decrypted_raw      RAW (2048);             -- stores decrypted binary text
  key_bytes_raw      RAW (128);              -- stores 128-bit encryption key
  encryption_type    PLS_INTEGER :=          -- total encryption type
                          DBMS_CRYPTO.ENCRYPT_AES128
                        + DBMS_CRYPTO.CHAIN_CBC
                        + DBMS_CRYPTO.PAD_PKCS5;
BEGIN
  while not success AND LENGTH(p2_keyval) < 512 loop
    begin
      key_bytes_raw := utl_raw.cast_to_raw(P2_KEYVAL);
      encrypted_raw := DBMS_CRYPTO.ENCRYPT
        (
           src => UTL_I18N.STRING_TO_RAW (p2_INPUT,  'AL32UTF8'),
           typ => encryption_type,
           key => key_bytes_raw
        );
      SUCCESS := TRUE;
    EXCEPTION
      WHEN OTHERS THEN
        P2_KEYVAL := P2_KEYVAL || 'X';
    END ;
  end loop;
  dbms_output.put_line('PASS ('||LENGTH(p2_keyval)||'): '||p2_keyval);
  dbms_output.put_line('RAW PASS LEN: '||LENGTH(key_bytes_raw));
  dbms_output.put_line('Encrypted value: ' || encrypted_raw);
END;
/

PASS (16): passwordXXXXXXXX
RAW PASS LEN: 32
Encrypted value: 5D39A532A468F04605E02AEC50F21B20

Published by: Sentinel on December 5, 2008 13:45

Tags: Database

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