Module client_data 

Parsing and validation of clientDataJSON.

clientDataJSON is a JSON object produced by the browser that binds a WebAuthn ceremony to a specific type, challenge, and origin. The relying party must verify all three fields before accepting any ceremony.

This module separates parsing from validation so that error messages can name the exact failing field (type mismatch vs challenge mismatch vs origin mismatch) rather than a generic “invalid client data”.

Structs

ParsedClientData

Decoded and structured clientDataJSON ready for validation.

Functions

parse_client_data

Decode and parse raw clientDataJSON bytes.

validate_client_data

Validate the parsed client data against the expected ceremony parameters.