[Feature] encrypted local SQLite database.

[sunhuachuang]

What ?

Encrypted local SQLite database.

Why ?

Encrypted everywhere.

How ?

• use sqlcipher to handle SQLite. use rusqlite and features bundled-sqlcipher-vendored-openssl. (better for cross-compile)
• update tdn_storage API. use open(path: PathBuf, password: &str)
• update ESSE
  • account.db: use device's local secret (every device drive it randomly when first launch) to encrypt/decrypt.
  • account's database: use user encrypt key (which is encrypted by user's PIN and secret) to encrypt/decrypt.

[sunhuachuang]

If you find any security risk, welcome to report.

[sunhuachuang]

LGTM.