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use std::{convert::TryInto, fmt, num::NonZeroU8};
use crate::{crypto_algorithms::DeviceKeyAlgorithm, DeviceId};
#[derive(Clone)]
pub struct DeviceKeyId {
full_id: Box<str>,
colon_idx: NonZeroU8,
}
impl fmt::Debug for DeviceKeyId {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(&self.full_id)
}
}
impl DeviceKeyId {
pub fn from_parts(algorithm: DeviceKeyAlgorithm, device_id: &DeviceId) -> Self {
let algorithm: &str = algorithm.as_ref();
let device_id: &str = device_id.as_ref();
let mut res = String::with_capacity(algorithm.len() + 1 + device_id.len());
res.push_str(algorithm);
res.push(':');
res.push_str(device_id);
let colon_idx =
NonZeroU8::new(algorithm.len().try_into().expect("no algorithm name len > 255"))
.expect("no empty algorithm name");
DeviceKeyId { full_id: res.into(), colon_idx }
}
pub fn algorithm(&self) -> DeviceKeyAlgorithm {
self.full_id[..self.colon_idx.get() as usize].into()
}
pub fn device_id(&self) -> &DeviceId {
(&self.full_id[self.colon_idx.get() as usize + 1..]).into()
}
}
fn try_from<S>(key_id: S) -> Result<DeviceKeyId, crate::Error>
where
S: AsRef<str> + Into<Box<str>>,
{
let colon_idx = ruma_identifiers_validation::device_key_id::validate(key_id.as_ref())?;
Ok(DeviceKeyId { full_id: key_id.into(), colon_idx })
}
common_impls!(DeviceKeyId, try_from, "Device key ID with algorithm and device ID");
#[cfg(test)]
mod tests {
use std::convert::TryFrom;
use super::DeviceKeyId;
use crate::{crypto_algorithms::DeviceKeyAlgorithm, Error};
#[test]
fn convert_device_key_id() {
assert_eq!(
DeviceKeyId::try_from("ed25519:JLAFKJWSCS")
.expect("Failed to create device key ID.")
.as_ref(),
"ed25519:JLAFKJWSCS"
);
}
#[cfg(feature = "serde")]
#[test]
fn serialize_device_key_id() {
let device_key_id = DeviceKeyId::try_from("ed25519:JLAFKJWSCS").unwrap();
let serialized = serde_json::to_value(device_key_id).unwrap();
assert_eq!(serialized, serde_json::json!("ed25519:JLAFKJWSCS"));
}
#[cfg(feature = "serde")]
#[test]
fn deserialize_device_key_id() {
let deserialized: DeviceKeyId =
serde_json::from_value(serde_json::json!("ed25519:JLAFKJWSCS")).unwrap();
let expected = DeviceKeyId::try_from("ed25519:JLAFKJWSCS").unwrap();
assert_eq!(deserialized, expected);
}
#[test]
fn missing_key_algorithm() {
assert_eq!(DeviceKeyId::try_from(":JLAFKJWSCS").unwrap_err(), Error::InvalidKeyAlgorithm);
}
#[test]
fn missing_delimiter() {
assert_eq!(
DeviceKeyId::try_from("ed25519|JLAFKJWSCS").unwrap_err(),
Error::MissingDelimiter,
);
}
#[test]
fn empty_device_id_ok() {
assert!(DeviceKeyId::try_from("ed25519:").is_ok());
}
#[test]
fn valid_key_algorithm() {
let device_key_id = DeviceKeyId::try_from("ed25519:JLAFKJWSCS").unwrap();
assert_eq!(device_key_id.algorithm(), DeviceKeyAlgorithm::Ed25519);
}
#[test]
fn valid_device_id() {
let device_key_id = DeviceKeyId::try_from("ed25519:JLAFKJWSCS").unwrap();
assert_eq!(device_key_id.device_id(), "JLAFKJWSCS");
}
}