KeyStoreAPI Upgrade (Encrypt/Decrypt + more)

[EduardDurech]

Fixes #550, resolves #246 Requires https://github.com/termux/termux-api-package/pull/161 and https://github.com/termux/termux-app/pull/3043

• Receiver receives context, sent to list, delete, encrypt, and decrypt for shared preferences

• listKeys is now listData and supports showing secret keys and preferences

• printKey supports secret keys and more KeyInfo parameters

• deleteKey is now deleteData and supports deleting preferences

• deleteData deletes all key-associated preferences upon deletion

• generateKey supports more key parameters (mode, padding, purposes, unlocked, invalidate, auths)

• generateKey supports secret keys

• generateKey refactored

• encryptData added

• encryptData supports Keystore Ciphers

• encryptData supports reading from path or stdin

• encryptData supports writing to shared preferences or stdout

• encryptData writes output in the form [IV.length][IV][Encrypted Data], if IV.length is 0 then IV omitted

• encryptedData never exposes data to Strings, stays as byte arrays and is flushed with zeroes after use

• encryptedData supports a quiet flag so encrypted data does not show in stdout

• encryptedData supports multiple shared preferences stored as a JSON with a key, value pair

• encryptedData encodes output to Base64

• decryptData added

• decryptData supports Keystore Ciphers

• decryptData supports reading from path, shared preferences, or stdin

• decryptData supports writing to stdout

• decryptData reads output in the form [IV.length][IV][Encrypted Data], if IV.length is 0 then IV omitted

• decryptedData never exposes data to Strings, stays as byte arrays and is flushed with zeroes after use

• decryptedData supports a quiet flag so decrypted data does not show in stdout

• decryptedData supports reading from JSON shared preferences with a key, value pair

• decryptedData encodes output to Base64

• decomposeBinary (for purposes and authorizations)

• getPrefsJSON and setPrefJSON (preferences as JSON)

• getIVSpec (support different AlgorithmParameterSpecs)

• getKey (get Public or Secret key for encryption, Private or Secret key for decryption)

• readFile (also supports Android < 8.0)

• Replaced ECGenParameterSpec and RSAKeyGenParameterSpec with AlgorithmParameterSpec

• Removed unnecessary imports and casts

[TermuxMonet]

Getting build error with latest commit Added activity.finish(). Build succeeds when removing this commit.

/home/runner/work/termux-api/termux-api/app/src/main/java/com/termux/api/apis/FingerprintAPI.java:122: error: cannot find symbol if (context instanceof Activity) ((Activity) context).finish(); ^

[EduardDurech]

Getting build error with latest commit Added activity.finish(). Build succeeds when removing this commit.

/home/runner/work/termux-api/termux-api/app/src/main/java/com/termux/api/apis/FingerprintAPI.java:122: error: cannot find symbol if (context instanceof Activity) ((Activity) context).finish(); ^

Unfortunately, I'm too busy to work on this, when I had built it last year it was fine, not sure if there's a conflict with a new API version, but all this part of the code does is close the fingerprint fragment activity once finished, as it left an overlay, the discussion is here https://github.com/termux/termux-api/issues/550#issuecomment-1287785719 and the comments proceeding (including my hidden ones, I did that just for brevity)

I'm not sure I understand the error though, cannot find symbol? is it referring to context? That should be passed in the postFingerprintResult method definition, otherwise it would be Activity, but that's a protected word, no?

Where exactly was the ^ pointing to? Or was it in-line as you showed? If that's the case it seems like an odd error, could be a tab-representation problem