Module ope

Available on crate feature ope only.

A simple order-preserving encryption function.

This function is used to generate revision counters for onion service descriptors. It is not suitable for other purposes.

The scheme here is the one described in the specifications as “Encrypted Time In Period”.

It is loosely based on the scheme first described in G. Bebek. “Anti-tamper database research: Inference control techniques.”“ Technical Report EECS 433 Final Report, Case Western Reserve University, November 2002.

Structs

AesOpeKey

Key for a simple order-preserving encryption on the offset from the start of an SRV protocol run.

SrvPeriodOffset

An opaque offset within an SRV period.

Constants

DERIVATION_PREFIX 🔒

A prefix used when deriving an AES key for this purpose.

Functions

add_slice_as_le_u16 🔒

Treating slice as a sequence of little-endian 2-byte words, add them into a u64.