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IDS Forum

Re: Encrypt/Decrypt Columns

Posted By: Jonathan Leffler
Date: Thursday, 27 January 2011, at 2:23 a.m.

In Response To: Encrypt/Decrypt Columns (DCHARLINE DCHARLINE)

Mostly repeating what others said, but a bit more explanation of why what
you tried does not work.

On Wed, Jan 26, 2011 at 12:56, DCHARLINE DCHARLINE <dcharline9@gmail.com>wrote:

> I use Informix in my application and I want to encrypt columns. For
> encrypting
> I use Jasypt and Hibernate, for decrypting I have to use SQL. I proved to
> encrypt columns with algorithms AES and TDES, then I tried decrypting them
> with functions DECRYPT_CHAR() and DECRYPT_BINARY() but I got the following
> error.
>

The format of the data generated by ENCRYPT_AES() is not simply the output
of applying AES with the given password to the given data. There is control
information and other material in there - such as the random IV, and the
optional hint. All this allows IDS to tell when it has valid encrypted data
to decode. Your chances of reproducing it outside the server are
approximately nil - certainly, simply using any old AES or 3-DES algorithm
is going to go nowhere.

Error: The encrypted data is wrong or corrupted.
>
> SQLState: IX000
>
> ErrorCode: -26005
>
> Algorithm TDES was used PBEWithMD5AndTripleDES and algorithm AES was used
> PBEWITHSHA256AND128BITAES-CBC-BC.
>
> Any suggestion???
>

As others have said: use ENCRYPT_AES() to encrypt the data, and
DECRYPT_CHAR() or DECRYPT_BINARY() to decrypt it.

You might legitimately ask "can we have functions encrypt_aes() and so on in
the client?" At the moment, there are no plans to provide them, mainly
because there has not been customer demand for them.

--
Jonathan Leffler <jonathan.leffler@gmail.com> #include <disclaimer.h>
Guardian of DBD::Informix - v2008.0513 - http://dbi.perl.org
"Blessed are we who can laugh at ourselves, for we shall never cease to be
amused."

--20cf30433ed2dc64a2049aced37b

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