DESCRIPTION
Here are various cryptographic and otherwise useful
functions for PostgreSQL.
encode(data, type)
encodes binary data into ASCII-only representation.
Types supported are 'hex' and 'base64'.
decode(data, type)
decodes the data processed by encode()
digest(data::text, hash_name::text)
which returns cryptographic checksum over data by
specified algorithm. eg
> select encode(digest('blah', 'sha1'), 'hex');
5bf1fd927dfb8679496a2e6cf00cbe50c1c87145
digest_exists(hash_name::text)::bool
which reports if particular hash type exists.
If any of arguments are NULL they return NULL.
HASHES
For choosing library you must edit Makefile.
standalone (default):
MD5, SHA1
(the code is from KAME project. Actually I hate code
duplication, but I also want to quarantee that MD5 and
SHA1 exist)
mhash (0.8.1):
MD5, SHA1, CRC32, CRC32B, GOST, TIGER, RIPEMD160,
HAVAL(256,224,192,160,128)
openssl:
MD5, SHA1, RIPEMD160, MD2
kerberos5 (heimdal):
MD5, SHA1
ENCRYPTION
There is experimental version out with encryption, HMAC
and UN*X crypt() support in
http://www.l-t.ee/marko/pgsql/
Current latest release is pgcrypto-0.3.tar.gz.
