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|
use std::fmt;
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
#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Hash)]
pub enum KeyID {
/// Lower 8 byte SHA-1 hash.
V4([u8;8]),
/// Used for holding fingerprints that we don't understand. For
/// instance, we don't grok v3 fingerprints. And, it is possible
/// that the Issuer subpacket contains the wrong number of bytes.
Invalid(Box<[u8]>)
}
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),
}
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())
}
}
}
}
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)
}
}
}
}
impl KeyID {
/// Converts a u64 to a KeyID.
pub fn new(data: u64) -> KeyID {
let bytes = [
(data >> (7 * 8)) as u8,
(data >> (6 * 8)) as u8,
(data >> (5 * 8)) as u8,
(data >> (4 * 8)) as u8,
(data >> (3 * 8)) as u8,
(data >> (2 * 8)) as u8,
(data >> (1 * 8)) as u8,
(data >> (0 * 8)) as u8
];
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(0u64
| ((b[0] as u64) << (7 * 8))
| ((b[1] as u64) << (6 * 8))
| ((b[2] as u64) << (5 * 8))
| ((b[3] as u64) << (4 * 8))
| ((b[4] as u64) << (3 * 8))
| ((b[5] as u64) << (2 * 8))
| ((b[6] as u64) << (1 * 8))
| ((b[7] as u64) << (0 * 8))),
KeyID::Invalid(_) =>
Err(Error::InvalidArgument("Invalid KeyID".into()).into()),
}
}
/// 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())
}
}
/// Reads a hex-encoded Key ID.
#[deprecated]
pub fn from_hex(hex: &str) -> Result<KeyID> {
hex.parse()
}
/// Returns a reference to the raw KeyID.
pub fn as_slice(&self) -> &[u8] {
match self {
&KeyID::V4(ref id) => id,
&KeyID::Invalid(ref id)<
|