Module encryption 

Symmetric encryption utilities.

Constants

ARGON2_TAG

Tag byte for Argon2id-derived encryption blobs.

NONCE_LEN

Byte size of the nonce used in both AES-GCM and ChaCha20Poly1305.

SALT_LEN

Byte size of the salt used in HKDF key derivation.

SYMMETRIC_KEY_LEN

Length in bytes of a symmetric encryption key (256-bit).

TAG_LEN

Byte size of the algorithm tag prefix.

Functions

decrypt_bytes

Decrypts data using a tagged encryption format and a user-provided passphrase.

encrypt_bytes

Encrypt data, prepending a tag to identify algorithm during decryption.

encrypt_bytes_argon2

Encrypt data using Argon2id for key derivation, prepending tag 0x03.

get_kdf_params

Returns Argon2id parameters for key derivation.

validate_passphrase

Validates that a passphrase meets minimum strength requirements.