Question: Is there a way to check if a database has been encrypted in sqleet?

[hidemat]

This way I could ask for a password if one is needed to open the database.

[2shady4u]

I think this is a possibility, but I didn't verify this yet myself:

Parameter header represents the first 16 bytes of the database file, that is, 
SQLite3 magic header string for unencrypted databases. 
For encrypted databases, header defaults to the value of salt unless explicitly set to other value. 
Remember that salt is a parameter for the key derivation function (KDF) which is 
stored in the beginning of the database file by default, in which case both 
salt and header contain the same value (KDF salt). 

(See the README.md)

As such you should be able to check the first 16 bytes of the database and see if it either contains the salt value or if it contains the default header string?

(See also: https://www.sqlite.org/fileformat.html for the default value of the header string)

[2shady4u]

Without encryption:

With encryption:

So you can clearly see that the first sixteen bytes contain the 'SQLite format 3\000'-header, while the encrypted file contains a randomized salt value.

[Atom735]

How i can compile this with last version of sqlite3?

[johnfound]

Simply execute "select count() from sqlite_master" or other simple query that is guaranteed to succeed; If the database is encrypted the statement will fail.