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of password-based encryption from RFC2440 (OpenPGP).
The goal of this code is to be more featureful encryption solution
than current encrypt(), which only functionality is running cipher
over data.
Compared to encrypt(), pgp_encrypt() does following:
* It uses the equvialent of random Inital Vector to get cipher
into random state before it processes user data
* Stores SHA-1 of the data into result so any modification
will be detected.
* Remembers if data was text or binary - thus it can decrypt
to/from text data. This was a major nuisance for encrypt().
* Stores info about used algorithms with result, so user needs
not remember them - more user friendly!
* Uses String2Key algorithms (similar to crypt()) with random salt
to generate full-length binary key to be used for encrypting.
* Uses standard format for data - you can feed it to GnuPG, if needed.
Optional features (off by default):
* Can use separate session key - user data will be encrypted
with totally random key, which will be encrypted with S2K
generated key and attached to result.
* Data compression with zlib.
* Can convert between CRLF<->LF line-endings - to get fully
RFC2440-compliant behaviour. This is off by default as
pgcrypto does not know the line-endings of user data.
Interface is simple:
pgp_encrypt(data text, key text) returns bytea
pgp_decrypt(data text, key text) returns text
pgp_encrypt_bytea(data bytea, key text) returns bytea
pgp_decrypt_bytea(data bytea, key text) returns bytea
To change parameters (cipher, compression, mdc):
pgp_encrypt(data text, key text, parms text) returns bytea
pgp_decrypt(data text, key text, parms text) returns text
pgp_encrypt_bytea(data bytea, key text, parms text) returns bytea
pgp_decrypt_bytea(data bytea, key text, parms text) returns bytea
Parameter names I lifted from gpg:
pgp_encrypt('message', 'key', 'compress-algo=1,cipher-algo=aes256')
For text data, pgp_encrypt simply encrypts the PostgreSQL internal data.
This maps to RFC2440 data type 't' - 'extenally specified encoding'.
But this may cause problems if data is dumped and reloaded into database
which as different internal encoding. My next goal is to implement data
type 'u' - which means data is in UTF-8 encoding by converting internal
encoding to UTF-8 and back. And there wont be any compatibility
problems with current code, I think its ok to submit this without UTF-8
encoding by converting internal encoding to UTF-8 and back. And there
wont be any compatibility problems with current code, I think its ok to
submit this without UTF-8 support.
Here is v4 of PGP encrypt. This depends on previously sent
Fortuna-patch, as it uses the px_add_entropy function.
- New function: pgp_key_id() for finding key id's.
- Add SHA1 of user data and key into RNG pools. We need to get
randomness from somewhere, and it is in user best interests
to contribute.
- Regenerate pgp-armor test for SQL_ASCII database.
- Cleanup the key handling so that the pubkey support is less
hackish.
Marko Kreen
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|---|---|---|
| .. | ||
| adddepend | ||
| btree_gist | ||
| chkpass | ||
| cube | ||
| dbase | ||
| dblink | ||
| dbmirror | ||
| dbsize | ||
| earthdistance | ||
| fulltextindex | ||
| fuzzystrmatch | ||
| intagg | ||
| intarray | ||
| isbn_issn | ||
| lo | ||
| ltree | ||
| mac | ||
| mSQL-interface | ||
| oid2name | ||
| oracle | ||
| pg_autovacuum | ||
| pg_buffercache | ||
| pg_trgm | ||
| pgbench | ||
| pgcrypto | ||
| pgstattuple | ||
| reindexdb | ||
| seg | ||
| spi | ||
| start-scripts | ||
| tablefunc | ||
| tips | ||
| tsearch2 | ||
| userlock | ||
| vacuumlo | ||
| xml2 | ||
| contrib-global.mk | ||
| Makefile | ||
| README | ||
The PostgreSQL contrib tree --------------------------- This subtree contains porting tools, analysis utilities, and plug-in features that are not part of the core PostgreSQL system, mainly because they address a limited audience or are too experimental to be part of the main source tree. This does not preclude their usefulness. Each subdirectory contains a README file with information about the module. Most items can be built with `gmake all' and installed with `gmake install' in the usual fashion, after you have run the `configure' script in the top-level directory. Some directories supply new user-defined functions, operators, or types. In these cases, after you have installed the files you need to register the new entities in the database system by running the commands in the supplied .sql file. For example, $ psql -d dbname -f module.sql See the PostgreSQL documentation for more information about this procedure. Index: ------ adddepend - Add object dependency information to pre-7.3 objects. by Rod Taylor <rbt@rbt.ca> btree_gist - Support for emulating BTREE indexing in GiST by Oleg Bartunov <oleg@sai.msu.su> and Teodor Sigaev <teodor@sigaev.ru> chkpass - An auto-encrypted password datatype by D'Arcy J.M. Cain <darcy@druid.net> cube - Multidimensional-cube datatype (GiST indexing example) by Gene Selkov, Jr. <selkovjr@mcs.anl.gov> dbase - Converts from dbase/xbase to PostgreSQL by Maarten.Boekhold <Maarten.Boekhold@reuters.com>, Frank Koormann <fkoorman@usf.uni-osnabrueck.de>, Ivan Baldo <lubaldo@adinet.com.uy> dblink - Allows remote query execution by Joe Conway <mail@joeconway.com> dbmirror - Replication server by Steven Singer <ssinger@navtechinc.com> dbsize - Reports database and table disk space by Peter Eisentraut <peter_e@gmx.net> earthdistance - Operator for computing earth distance for two points by Hal Snyder <hal@vailsys.com> fulltextindex - Full text indexing using triggers by Maarten Boekhold <maartenb@dutepp0.et.tudelft.nl> fuzzystrmatch - Levenshtein, metaphone, and soundex fuzzy string matching by Joe Conway <mail@joeconway.com>, Joel Burton <jburton@scw.org> intagg - Integer aggregator by mlw <markw@mohawksoft.com> intarray - Index support for arrays of int4, using GiST by Teodor Sigaev <teodor@sigaev.ru> and Oleg Bartunov <oleg@sai.msu.su> isbn_issn - PostgreSQL type extensions for ISBN (books) and ISSN (serials) by Garrett A. Wollman <wollman@khavrinen.lcs.mit.edu> lo - Large Object maintenance by Peter Mount <peter@retep.org.uk> ltree - Tree-like data structures by Teodor Sigaev <teodor@sigaev.ru> and Oleg Bartunov <oleg@sai.msu.su> mSQL-interface - mSQL API translation library by Aldrin Leal <aldrin@americasnet.com> mac - Support functions for MAC address types by Lawrence E. Rosenman <ler@lerctr.org> oid2name - Maps numeric files to table names by B Palmer <bpalmer@crimelabs.net> oracle - Converts Oracle database schema to PostgreSQL by Gilles Darold <gilles@darold.net> pg_autovacuum - Automatically performs vacuum by Matthew T. O'Connor <matthew@zeut.net> pg_buffercache - Real time queries on the shared buffer cache by Mark Kirkwood <markir@paradise.net.nz> pg_trgm - Functions for determining the similarity of text based on trigram matching. by Oleg Bartunov <oleg@sai.msu.su> and Teodor Sigaev <teodor@sigaev.ru> pgbench - TPC-B like benchmarking tool by Tatsuo Ishii <t-ishii@sra.co.jp> pgcrypto - Cryptographic functions by Marko Kreen <marko@l-t.ee> pgstattuple - A function to return statistics about "dead" tuples and free space within a table by Tatsuo Ishii <t-ishii@sra.co.jp> reindexdb - Reindexes a database by Shaun Thomas <sthomas@townnews.com> seg - Confidence-interval datatype (GiST indexing example) by Gene Selkov, Jr. <selkovjr@mcs.anl.gov> spi - Various trigger functions, examples for using SPI. start-scripts - Scripts for starting the server at boot time. tablefunc - Examples of functions returning tables by Joe Conway <mail@joeconway.com> tips/apache_logging - Getting Apache to log to PostgreSQL by Terry Mackintosh <terry@terrym.com> tsearch2 - Full-text-index support using GiST by Teodor Sigaev <teodor@sigaev.ru> and Oleg Bartunov <oleg@sai.msu.su>. userlock - User locks by Massimo Dal Zotto <dz@cs.unitn.it> vacuumlo - Remove orphaned large objects by Peter T Mount <peter@retep.org.uk> xml2 - Storing XML in PostgreSQL by John Gray <jgray@azuli.co.uk>