To Encrypt or decrypt, we will need a key. This key will be stored in a table which can be accessed only by the authorized personnel.
In the below examples, the key has been hardcoded.
dbms_crypto example to encrypt information
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Declare l_key varchar2(2000) := ‘1234567890123456’; l_mod number := dbms_crypto.ENCRYPT_AES128 + dbms_crypto.CHAIN_CBC + dbms_crypto.PAD_PKCS5; l_enc raw (2000); begin l_enc := dbms_crypto.encrypt ( UTL_I18N.STRING_TO_RAW (p_in_val, ‘AL32UTF8’), l_mod, UTL_I18N.STRING_TO_RAW (l_key, ‘AL32UTF8’) ); end; |
dbms_crypto example to decrypt information
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Declare l_key varchar2(2000) := ‘1234567890123456’; lv_in_val raw (2000) := hextoraw(p_in_val); l_mod number := dbms_crypto.ENCRYPT_AES128 + dbms_crypto.CHAIN_CBC + dbms_crypto.PAD_PKCS5; l_dec raw (2000); begin l_dec := dbms_crypto.decrypt( lv_in_val, l_mod, UTL_I18N.STRING_TO_RAW (l_key, 'AL32UTF8') ); dbms_output.put_line ('Decrypted='||utl_i18n.raw_to_char(l_dec)); end; |