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|
use std::fmt;
#[cfg(any(test, feature = "quickcheck"))]
use quickcheck::{Arbitrary, Gen};
use crate::Error;
use crate::Fingerprint;
use crate::Result;
/// A short identifier for certificates and keys.
///
/// A KeyID is a fingerprint fragment. It identifies a public key,
/// but is easy to forge. For more details about how a KeyID is
/// generated, see [Section 12.2 of RFC 4880].
///
/// [Section 12.2 of RFC 4880]: https://tools.ietf.org/html/rfc4880#section-12.2
///
/// Note: This enum cannot be exhaustively matched to allow future
/// extensions.
#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Hash)]
pub enum KeyID {
/// Lower 8 byte SHA-1 hash.
V4([u8;8]),
/// Used for holding keyids that we don't understand. For
/// instance, we don't grok v3 keyids. And, it is possible that
/// the Issuer subpacket contains the wrong number of bytes.
Invalid(Box<[u8]>),
/// This marks this enum as non-exhaustive. Do not use this
/// variant.
#[doc(hidden)] __Nonexhaustive,
}
impl fmt::Display for KeyID {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.convert_to_string(true))
}
}
impl fmt::Debug for KeyID {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_tuple("KeyID")
.field(&self.to_string())
.finish()
}
}
impl fmt::UpperHex for KeyID {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(&self.convert_to_string(false))
}
}
impl fmt::LowerHex for KeyID {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut hex = self.convert_to_string(false);
hex.make_ascii_lowercase();
f.write_str(&hex)
}
}
impl std::str::FromStr for KeyID {
type Err = anyhow::Error;
fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
let bytes = crate::fmt::hex::decode_pretty(s)?;
// A KeyID is exactly 8 bytes long.
if bytes.len() == 8 {
Ok(KeyID::from_bytes(&bytes[..]))
} else {
// Maybe a fingerprint was given. Try to parse it and
// convert it to a KeyID.
Ok(s.parse::<Fingerprint>()?.into())
}
}
}
impl From<KeyID> for Vec<u8> {
fn from(id: KeyID) -> Self {
let mut r = Vec::with_capacity(8);
match id {
KeyID::V4(ref b) => r.extend_from_slice(b),
KeyID::Invalid(ref b) => r.extend_from_slice(b),
KeyID::__Nonexhaustive => unreachable!(),
}
r
}
}
impl From<u64> for KeyID {
fn from(id: u64) -> Self {
Self::new(id)
}
}
impl From<[u8; 8]> for KeyID {
fn from(id: [u8; 8]) -> Self {
KeyID::from_bytes(&id[..])
}
}
impl From<&Fingerprint> for KeyID {
fn from(fp: &Fingerprint) -> Self {
match fp {
Fingerprint::V4(fp) =>
KeyID::from_bytes(&fp[fp.len() - 8..]),
Fingerprint::Invalid(fp) => {
KeyID::Invalid(fp.clone())
}
Fingerprint::__Nonexhaustive => unreachable!(),
}
}
}
impl From<Fingerprint> for KeyID {
fn from(fp: Fingerprint) -> Self {
match fp {
Fingerprint::V4(fp) =>
KeyID::from_bytes(&fp[fp.len() - 8..]),
Fingerprint::Invalid(fp) => {
KeyID::Invalid(fp)
}
Fingerprint::__Nonexhaustive => unreachable!(),
}
}
}
impl KeyID {
/// Converts a u64 to a KeyID.
pub fn new(data: u64) -> KeyID {
let bytes = data.to_be_bytes();
Self::from_bytes(&bytes[..])
}
/// Converts the KeyID to a u64 if possible.
pub fn as_u64(&self) -> Result<u64> {
match &self {
KeyID::V4(ref b) =>
Ok(u64::from_be_bytes(*b)),
KeyID::Invalid(_) =>
Err(Error::InvalidArgument("Invalid KeyID".into()).into()),
KeyID::__Nonexhaustive => unreachable!(),
}
}
/// Reads a binary key ID.
pub fn from_bytes(raw: &[u8]) -> KeyID {
if raw.len() == 8 {
let mut keyid : [u8; 8] = Default::default();
keyid.copy_from_slice(raw);
KeyID::V4(keyid)
} else {
KeyID::Invalid(raw.to_vec().into_boxed_slice())
}
}
/// Returns a reference to the raw KeyID.
pub fn as_bytes(&self) -> &[u8] {
match self {
&KeyID::V4(ref id) => id,
&KeyID::Invalid(ref id) => id,
KeyID::__Nonexhaustive => unreachable!(),
}
}
/// Returns the wildcard KeyID.
pub fn wildcard() -> Self {
Self::from_bytes(&[0u8; 8][..])
}
/// Returns true if this is a wild card ID.
pub fn is_wildcard(&self) -> bool {
self.as_bytes().iter().all(|b| *b == 0)
}
/// Converts this key ID to its canonical hexadecimal representation.
///
/// This representation is always uppercase and without spaces and is
/// suitable for stable key identifiers.
///
/// The output of this function is exactly the same as formatting this
/// object with the `:X` format specifier.
///
/// ```rust
/// # extern crate sequoia_openpgp as openpgp;
/// use openpgp::KeyID;
///
/// let keyid = "fb3751f1587daef1".parse::<KeyID>().unwrap();
///
/// assert_eq!("FB3751F1587DAEF1", keyid.to_hex());
/// assert_eq!(format!("{:X}", keyid), keyid.to_hex());
/// ```
pub fn to_hex(&self) -> String {
format!("{:X}", self)
}
/// Parses the hexadecimal representation of an OpenPGP key ID.
///
/// This function is the reverse of `to_hex`. It also accepts other variants
/// of the key ID notation including lower-case letters, spaces and optional
/// leading `0x`.
///
/// ```rust
/// # extern crate sequoia_openpgp as openpgp;
/// use openpgp::KeyID;
///
/// let keyid = KeyID::from_hex("0xfb3751f1587daef1").unwrap();
///
/// assert_eq!("FB3751F1587DAEF1", keyid.to_hex());
/// ```
pub fn from_hex(s: &str) -> std::result::Result<Self, anyhow::Error> {
std::str::FromStr::from_str(s)
}
/// Common code for the above functions.
fn convert_to_string
|