odrive-decrypt

Decrypts files encrypted by oDrive.

This is a work in progress. oDrive has yet to divulge critical information regarding the encryption process. None of the code has been tested.

Please follow the discussions on oDrive's forum.

• Encryption questions: Key storage, decryption process, and others
• Decrypting Data without odrive

Required information

• File encryption process: Source
  • Encryption algorithm: AES-256-CBC
    • Key size: 256-bits
    • IV size: 128-bits
  • KDF: PBKDF2
    • Salt size: 64-bits
    • Iterations
    • Digest algorithm: HMAC-SHA256
  • Plaintext format:
    • File contents
    • SHA256 hash of file contents
  • Encrypted file format:
    • Version info size: 8-bits
    • Salt
    • IV
    • Ciphertext
• File and folder name encryption process