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OT: MySQL AES_ENCRYPT/AES_DECRYPT (was: Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT)) [message #181814 is a reply to message #181768]

Wed, 05 June 2013 12:51

Arno Welzel
Messages: 317
Registered: October 2011

Karma:

Senior Member

Am 30.05.2013 16:38, schrieb ViVi:

> i'm definetly a moron:
> i've defined the encrypted field too short:
> `categoria_nome` varbinary(30) DEFAULT NULL,
> and every string longer than 15 chars was corrupted.
> ...
> ..
> .
> sorry for the disturb, and please don't be too rude
> :-(

Nobody's perfect ;-)

JFTR:

< http://dev.mysql.com/doc/refman/4.1/en/encryption-functions.html#function_a es-encrypt>

Cite:

"Because AES is a block-level algorithm, padding is used to encode
uneven length strings and so the result string length may be calculated
using this formula:

16 * (trunc(string_length / 16) + 1)

If AES_DECRYPT() detects invalid data or incorrect padding, it returns
NULL. However, it is possible for AES_DECRYPT() to return a non-NULL
value (possibly garbage) if the input data or the key is invalid."

--
Arno Welzel
http://arnowelzel.de
http://de-rec-fahrrad.de

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[Message index]

		problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: ViVi on Thu, 30 May 2013 06:28
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: Denis McMahon on Thu, 30 May 2013 07:46
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: The Natural Philosoph on Thu, 30 May 2013 08:21
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: ViVi on Thu, 30 May 2013 08:58
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: Doug Miller on Thu, 30 May 2013 10:53
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: ViVi on Thu, 30 May 2013 11:53
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: The Natural Philosoph on Thu, 30 May 2013 12:52
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: Jerry Stuckle on Thu, 30 May 2013 12:09
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: ViVi on Thu, 30 May 2013 14:05
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: The Natural Philosoph on Thu, 30 May 2013 14:34
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: ViVi on Thu, 30 May 2013 14:38
		Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT) By: The Natural Philosoph on Thu, 30 May 2013 14:57
		OT: MySQL AES_ENCRYPT/AES_DECRYPT (was: Re: problem encrypting data (AES_ENCRYPT/AES_DECRYPT)) By: Arno Welzel on Wed, 05 June 2013 12:51

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