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Chapter 6 Oracle Encryption

    -- Now we have to find out the session context
    -- attribute input_vector
select sys_context (‘claim_app_ctx’,'input_vector')
    into v_iv_string
    from dual;
    v_iv := utl_raw.cast_to_raw (v_iv_string);
    -- Now we have to encrypt the value
    dbms_obfuscation_toolkit.DES3Encrypt (
        input          => v_input_raw,
        key            => p_key,
        which          => 1,
        iv             => v_iv,
        encrypted_data => v_ret
    return v_ret;

Note how we have selected the session context attribute and applied that to the input_vector shown in bold in the script.



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