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Raw encryption functions

Please note they solely apply a cipher to the data and do not provide additional security measures. 
encrypt(data bytea, key bytea, type text) -> bytea
decrypt(data bytea, key bytea, type text) -> bytea
The cipher method is specified by type. The syntax of the type string is: 
algorithm [-mode][/pad:padding]
algorithm is:
  • aes — AES (Rijndael-128, -192 or -256)
mode is one of:
  • cbc — next block depends on previous (default)
  • ecb — each block is encrypted separately (for testing only)
padding is one of:
  • pkcs — data may be any length (default)
  • none — data must be multiple of cipher block size
The given encryption/decryption key MUST match length 16/24/32 bytes as required by aes-128/192/256.
of type text
aes-cbc/pad:pkcs => AES algorithm, cbc mode, enabling padding
aes => AES algorithm, cbc mode, enabling padding
aes-ecb => AES algorithm, ecb mode, enabling padding
Example of raw encryption functions
SELECT encrypt('Hello, World!', 'my_secret_key111', 'aes-cbc/pad:pkcs');
----RESULT
\x9cf6a49f90b3ac816aeeeed286606fdb
(1 row)
Example of raw encryption functions
SELECT decrypt('\x9cf6a49f90b3ac816aeeeed286606fdb','my_secret_key111', 'aes-cbc/pad:pkcs');)
----RESULT
\x48656c6c6f2c20576f726c6421
(1 row)

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hmac

Returns the HMAC result regarding the input secret, payload and hash algorithm. Please refer to HMAC for more information in cryptography. Currently, the supported hash algorithms for hash_algo are sha1 and sha256.
Syntax
hmac (secret varchar, payload bytea, hash_algo varchar) -> signature bytea
Example
SELECT hmac('secret', 'payload'::bytea, 'sha256');
----RESULT
\xb82fcb791acec57859b989b430a826488ce2e479fdf92326bd0a2e8375a42ba4
(1 row)