104 lines
3.2 KiB
Rust
104 lines
3.2 KiB
Rust
//! Identifiers for homeserver signing keys used for federation.
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use std::{convert::TryInto, num::NonZeroU8, str::FromStr};
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use ruma_identifiers_validation::{crypto_algorithms::SigningKeyAlgorithm, Error};
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/// Key identifiers used for homeserver signing keys.
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#[derive(Clone, Debug)]
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pub struct ServerSigningKeyId {
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full_id: Box<str>,
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colon_idx: NonZeroU8,
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}
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impl ServerSigningKeyId {
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/// Create a `ServerSigningKeyId` from a `SigningKeyAlgorithm` and a `ServerId`.
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pub fn from_parts(algorithm: SigningKeyAlgorithm, version: &str) -> Self {
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let algorithm: &str = algorithm.as_ref();
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let mut res = String::with_capacity(algorithm.len() + 1 + version.len());
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res.push_str(algorithm);
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res.push(':');
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res.push_str(version);
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let colon_idx =
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NonZeroU8::new(algorithm.len().try_into().expect("no algorithm name len > 255"))
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.expect("no empty algorithm name");
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ServerSigningKeyId { full_id: res.into(), colon_idx }
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}
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/// Returns key algorithm of the server key ID.
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pub fn algorithm(&self) -> SigningKeyAlgorithm {
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SigningKeyAlgorithm::from_str(&self.full_id[..self.colon_idx.get() as usize]).unwrap()
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}
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/// Returns the version of the server key ID.
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pub fn version(&self) -> &str {
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&self.full_id[self.colon_idx.get() as usize + 1..]
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}
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}
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fn try_from<S>(key_id: S) -> Result<ServerSigningKeyId, Error>
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where
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S: AsRef<str> + Into<Box<str>>,
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{
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let colon_idx = ruma_identifiers_validation::signing_key_id::validate(key_id.as_ref())?;
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Ok(ServerSigningKeyId { full_id: key_id.into(), colon_idx })
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}
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common_impls!(ServerSigningKeyId, try_from, "Key ID with algorithm and version");
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#[cfg(test)]
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mod tests {
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use std::convert::TryFrom;
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#[cfg(feature = "serde")]
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use serde_json::{from_value as from_json_value, json, to_value as to_json_value};
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use crate::{Error, ServerSigningKeyId};
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#[cfg(feature = "serde")]
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use ruma_identifiers_validation::crypto_algorithms::SigningKeyAlgorithm;
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#[cfg(feature = "serde")]
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#[test]
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fn deserialize_id() {
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let server_key_id: ServerSigningKeyId = from_json_value(json!("ed25519:Abc_1")).unwrap();
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assert_eq!(server_key_id.algorithm(), SigningKeyAlgorithm::Ed25519);
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assert_eq!(server_key_id.version(), "Abc_1");
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}
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#[cfg(feature = "serde")]
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#[test]
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fn serialize_id() {
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let server_key_id: ServerSigningKeyId =
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ServerSigningKeyId::try_from("ed25519:abc123").unwrap();
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assert_eq!(to_json_value(&server_key_id).unwrap(), json!("ed25519:abc123"));
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}
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#[test]
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fn invalid_version_characters() {
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assert_eq!(
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ServerSigningKeyId::try_from("ed25519:Abc-1").unwrap_err(),
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Error::InvalidCharacters
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);
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}
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#[test]
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fn invalid_key_algorithm() {
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assert_eq!(
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ServerSigningKeyId::try_from("signed_curve25519:Abc-1").unwrap_err(),
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Error::UnknownKeyAlgorithm,
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);
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}
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#[test]
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fn missing_delimiter() {
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assert_eq!(
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ServerSigningKeyId::try_from("ed25519|Abc_1").unwrap_err(),
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Error::MissingSigningKeyDelimiter,
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);
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}
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}
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