Struct MachineId 

pub struct MachineId(/* private fields */);

This machine’s name, minted once by the daemon and served to every module that registers with it (on HELLO_ACK and server.describe).

It is 16 random bytes rendered as exactly 32 lowercase hex characters. It is opaque: it carries no structure and is not derived from a key, a hostname or any other host fact. The daemon stores it at <data home>/cortexkit/machine-id and never rewrites that file; an operator changes it only with ck machine adopt, which takes effect at the next daemon start.

A name, never an authority

Nothing may admit a peer, grant trust or skip a check because two messages carry the same machine id. Authority stays on keys (a peer’s roster entry, the vault). The id deliberately outlives a key rotation, so treating it as an identity would let a revoked key’s history vouch for its replacement. Two machines restored from one backup also carry the same id, which is exactly why it can name a machine but never prove one.

Construction validates the shape, so a value of this type is always 32 lowercase hex characters. A module talking to a daemon that predates the id sees no value at all and must read that as “the daemon predates the machine id”, never as “there is no machine” and never as a cue to mint its own.

Implementations

impl MachineId

pub const HEX_LEN: usize = 32

Length of the rendered id in characters (16 bytes, two hex digits each).

pub fn parse(value: &str) -> Result<Self, MachineIdError>

Validate value as a machine id: exactly 32 characters, each 0-9 or a-f. Uppercase hex is refused rather than folded, so one machine has exactly one spelling and string comparison is identity of the name.

pub fn from_bytes(bytes: [u8; 16]) -> Self

Render 16 bytes as a machine id. The caller supplies the randomness; the daemon uses the operating system’s CSPRNG.

pub fn as_str(&self) -> &str

The 32-character lowercase hex rendering.

Trait Implementations

impl Clone for MachineId

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MachineId

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MachineId

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for MachineId

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

Formats the value using the given formatter.

impl Eq for MachineId

impl From<MachineId> for String

fn from(value: MachineId) -> Self

Converts to this type from the input type.

impl FromStr for MachineId

type Err = MachineIdError

The associated error which can be returned from parsing.

fn from_str(value: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for MachineId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for MachineId

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for MachineId

fn eq(&self, other: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for MachineId

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for MachineId

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MachineId

impl TryFrom<String> for MachineId

type Error = MachineIdError

The type returned in the event of a conversion error.

fn try_from(value: String) -> Result<Self, Self::Error>

Performs the conversion.