findmy.util.crypto¶

Pure-python NIST P-224 Elliptic Curve cryptography. Used for some Apple algorithms.

Attributes¶

`encrypt_password`(→ bytes)	Encrypt password using PBKDF2-HMAC.
`decrypt_spd_aes_cbc`(→ bytes)	Decrypt SPD data using SRP session key.
`x963_kdf`(→ bytes)	Single pass of X9.63 KDF with SHA1.
`bytes_to_int`(→ int)	Convert bytes in big-endian format to int.
`derive_ps_key`(→ bytes)	Derive a primary or secondary key used by an accessory.

findmy.util.crypto.P224_N = 26959946667150639794667015087019625940457807714424391721682722368061¶

findmy.util.crypto.encrypt_password(password: str, salt: bytes, iterations: int, protocol: str) → bytes¶: Encrypt password using PBKDF2-HMAC.

findmy.util.crypto.decrypt_spd_aes_cbc(session_key: bytes, data: bytes) → bytes¶: Decrypt SPD data using SRP session key.

findmy.util.crypto.x963_kdf(value: bytes, si: bytes, length: int) → bytes¶: Single pass of X9.63 KDF with SHA1.

findmy.util.crypto.bytes_to_int(value: bytes) → int¶: Convert bytes in big-endian format to int.

findmy.util.crypto.derive_ps_key(privkey: bytes, sk: bytes) → bytes¶

Derive a primary or secondary key used by an accessory.

Parameters:

privkey – Private key generated during pairing
sk – Current secret key for this time period. Use SKN to derive the primary key, SKS for secondary.