View source for Kexi/Security/Add password protecting to Kexi database files

'''Status: assigned to W. Kosowicz <pcellix@gmail.com>''', '''Target: 3.?''', {{Wish|300625}}

Mentored by [[User:Jstaniek|Jstaniek]] ([[User talk:Jstaniek|talk]]) 13:22, 4 October 2014 (UTC)

==Goal==
Ability to encrypt .kexi database files (SQLite-based) with a password. 

==Scenario==
*User shares the .kexi files (e.g. via email) but want reasonable security.
*He prefers to use passwords instead of public/private keys.

==The choise of encryption solution for SQLite==
*[http://stackoverflow.com/questions/5669905/sqlite-with-encryption-password-protection Selection of password protection solutions for SQLite]. SQLCipher and botansqlite3 looks interesting (and FOSS).
*It's not clear if using QCA gives any benefits.
*[http://www.sqlite.org/see/doc/trunk/www/readme.wiki SQLite Encryption Extension (SEE)] is an official but non-FOSS solution.

==Requirements==
*R1. Password is used for a single session with Kexi, when database is closed the password is no longer in memory.
*R2. When database is closed, it's stays in an encrypted form.
*R3. .kexi files are not encrypted by default.
*R3.1. User can set password after successfull openining of .kexi file (encrypted or not encrypted).
*R3.2. Setting password to empty, effectively removes encryption.
*R4. The Kexi app should be able to detect that the .kexi file requires password on opening.

==Notes==
*[https://forum.kde.org/viewtopic.php?f=221&t=102232&p=320343#p320343 Related discussion on Kexi Forum]
*See also [[../Add password protecting to individual objects in Kexi database file/]]
*Related: Since 3.8.7 SQLite supports '''user authentication''': http://www.sqlite.org/src/doc/trunk/ext/userauth/user-auth.txt