Re: encrypt/decrypt problem

If the encrypt function is from the contribs, it CAN do reversible encryption, you just have to choose which encryption
typeyou want to use. Please look in the archives at: 

http://marc.theaimsgroup.com/?l=postgresql-general&w=2&r=1&s=encrypt+contrib&q=b

Ivan wrote:
>>Ivan wrote:
>>
>>>hi
>>>
>>>i need to encrypt some fields in a table of my postgre db, my table is
>>>named clients and the fields are "id", "name" and "password", i was
>>>looking and i find the pgcrypto utility, i read something about the
>>>pgcrypto functions and i see the "crypto" function and use it, well
>>>the fields change and i supose that was encrypted... but how i could
>>>obtain the decrypt info??? (i don't know it), well next i read about
>>>the "encrypt-decrypt" function, maybe it is what i need i try to use
>>>the encrypt function from the EMS PostgreSQL Manager (SQL editor) in
>>>that form
>>>
>>>UPDATE tabla2 SET pass = encrypt(pass, 'iv', 'bf');
>>>
>>>next i try:
>>>
>>>encrypt(pass,'fooz','bf')
>>>
>>>but either work... i don't find much examples about it, pls does
>>>anyone have an idea of how i can implement the "encrypt-decrypt on my
>>>table???
>>
>>You may be running into a "one-way-hash" encryption system - in which
>>when you use the crypto function, the data is stored in encrypted
>>format, with the idea that you take your input supplied, encrypt it, and
>> compare it to the field (containing the previously encrypted data) - if
>> it matches, then the "password" or whatever was entered correctly.
>>
>>It typically isn't possible to reverse this one-way hash back to
>>plaintext easily.
>>
>>Andrew Ayers
>
>
>
> thanks Andrew. well now i know that the crypt function is not what i need,
> i need to encrypt all the fields of some tables not only the passwords, if
> someone knows how to use the encrypt/decrypt function and could tell me
> something, i will be grateful
>
> ivan
>
>
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