Struct AuthenticationResponse 

pub struct AuthenticationResponse {
    pub user_presence: Flags,
    pub counter: u32,
    pub signature: Vec<u8>,
}

This message is output by the U2F token after processing/signing the AuthenticationRequest message. Its raw representation is the concatenation of its fields.

Fields

user_presence: Flags

Whether user presence was verified or not

counter: u32

This a counter value that the U2F token increments every time it performs an authentication operation. It must be transported as big endian representation.

signature: Vec<u8>

This is a ECDSA signature (on P-256) over the following byte string.

1. The application parameter [32 bytes] from the authentication request message.
2. The above user presence byte [1 byte].
3. The above counter [4 bytes].
4. The challenge parameter [32 bytes] from the authentication request message.

The signature is encoded in ANSI X9.62 format (see [ECDSA-ANSI] in bibliography). The signature is to be verified by the relying party using the public key obtained during registration.

Implementations

impl AuthenticationResponse

pub fn encode(self) -> Vec<u8>

Encode the response to its successfull binary representation