#7 Encryption

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Akshat Sharma edited this page Dec 13, 2020 · 2 revisions

Entirety of encryption is handled in EncryptionController. This class as following functions:

generateKeys(): returns an array of size 2. arr[0] is private key while arr[1] is public key.
getEncryptedMessage(): takes a ChatMessage object whose mssgText attribute is plain text and returns a ChatMessage object whose mssgText attribute is encrypted.
getDecryptedMessage(): opposite of getEncryptedMessage(). Returns a decrypted plaintext chatMessage.

The controller always encrypts with recipient's public key and decrypts with current user's (sender's) private key.

Where encryption-decryption takes place:

All incoming/outgoing radio messages are encrypted.
All incoming/outgoing offline messages are encrypted.
All incoming/outgoing online messages are encrypted.
Any message being stored in local database is decrypted.

EncryptionController can be found in security/EncryptionController.java