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How to encrypt column in postgres database using pgcrypto addon ?

I am using postgres 9.3 and i need to encrypt one of my column , does postgres also support Aes encryption or by any mean i can achieve it ?

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up vote 1 down vote accepted

Yes, Postgres pgcrypto module does support AES. All details with examples can be found here. As for the sample usage:

-- add extension
CREATE EXTENSION pgcrypto;

-- sample DDL
CREATE TABLE test_encrypt(
  value TEXT
);
INSERT INTO test_encrypt VALUES ('testvalue');

-- encrypt value
WITH encrypted_data AS (
  SELECT crypt('PasswordToEncrypt0',gen_salt('md5')) as hashed_value
)
UPDATE test_encrypt SET value = (SELECT hashed_value FROM encrypted_data);

Validate password:

SELECT (value = crypt('PasswordToEncrypt0', value)) AS match FROM test_encrypt;

Returns:

 match 
-------
 t
(1 row)
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This means that i need to make changes in my application code too , is it possible to achieve it without making any changes at application level. – Nitin Jan 12 at 12:20
    
@Nitin - well, it's hard to tell you due to the fact that I have not seen your auth implementation.. – Dmitry Savinkov Jan 12 at 12:42

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