Struct Credential 

pub struct Credential<'l> {
    pub label: &'l [u8],
    pub kind: Kind,
    pub algorithm: Algorithm,
    pub digits: u8,
    pub secret: KeyId,
    pub touch_required: bool,
    pub counter: Option<u32>,
}

Fields

label: &'l [u8]

kind: Kind

algorithm: Algorithm

digits: u8

secret: KeyId

What we get here (inspecting the client app) may not be the raw K, but K’ in HMAC lingo, i.e., If secret.len() < block size (64B for Sha1/Sha256, 128B for Sha512), then it’s the hash of the secret. Otherwise, it’s the secret, padded to length at least 14B with null bytes. This is of no concern to us, as is it does not change the MAC.

The 14 is a bit strange: RFC 4226, section 4 says: “The algorithm MUST use a strong shared secret. The length of the shared secret MUST be at least 128 bits. This document RECOMMENDs a shared secret length of 160 bits.”

Meanwhile, the client app just pads up to 14B :)

touch_required: bool

counter: Option<u32>

Trait Implementations

impl<'l> Clone for Credential<'l>

fn clone(&self) -> Credential<'l>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'l> Debug for Credential<'l>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de: 'l, 'l> Deserialize<'de> for Credential<'l>

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'l> PartialEq for Credential<'l>

fn eq(&self, other: &Credential<'l>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'l> Serialize for Credential<'l>

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<'l> Copy for Credential<'l>

impl<'l> Eq for Credential<'l>

impl<'l> StructuralPartialEq for Credential<'l>