64 lines
2.1 KiB
Rust
64 lines
2.1 KiB
Rust
use serde_json::Value;
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use super::{
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error::{Error, Result},
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message::Message,
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ssb_sha256,
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};
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use std::time::{SystemTime, UNIX_EPOCH};
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#[derive(Debug, Serialize, Deserialize)]
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pub struct Feed {
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pub key: String,
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pub value: Value,
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pub timestamp: f64,
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pub rts: Option<f64>,
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}
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impl ToString for Feed {
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fn to_string(&self) -> String {
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serde_json::to_string(self).unwrap()
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}
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}
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impl Feed {
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pub fn into_message(self) -> Result<Message> {
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Message::from_value(self.value)
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}
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pub fn new(m: Message) -> Self {
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let key = format!("%{}.sha256", base64::encode(&ssb_sha256(&m.value).unwrap()));
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let timestamp = SystemTime::now()
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.duration_since(UNIX_EPOCH)
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.unwrap()
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.as_secs_f64();
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Feed {
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key,
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value: m.value,
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timestamp,
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rts: None,
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}
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}
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pub fn from_slice(s: &[u8]) -> Result<Self> {
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let feed: Feed = serde_json::from_slice(s)?;
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let digest = format!("%{}.sha256", base64::encode(&ssb_sha256(&feed.value)?));
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if digest != feed.key {
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return Err(Error::FeedDigestMismatch);
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}
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Ok(feed)
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_verify_feed_integrity() -> Result<()> {
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let feed = r#"{"key":"%Cg0ZpZ8cV85G8UIIropgBOvM8+Srlv9LSGDNGnpdK44=.sha256","value":{"previous":"%seUEAo7PTyA7vNwnOrmGIsUFfpyRzOvzGVv1QCb/Fz8=.sha256","author":"@BIbVppzlrNiRJogxDYz3glUS7G4s4D4NiXiPEAEzxdE=.ed25519","sequence":37,"timestamp":1439392020612,"hash":"sha256","content":{"type":"post","text":"@paul real time replies didn't work.","repliesTo":"%xWKunF6nXD7XMC+D4cjwDMZWmBnmRu69w9T25iLNa1Q=.sha256","mentions":["%7UKRfZb2u8al4tYWHqM55R9xpE/KKVh9U0M6BdugGt4=.sha256"],"recps":[{"link":"@hxGxqPrplLjRG2vtjQL87abX4QKqeLgCwQpS730nNwE=.ed25519","name":"paul"}]},"signature":"gGxSPdBJZxp6x5f3HzQGoQSeSdh/C5AtymIn+miWa+lcC6DdqpRSgaeH9KHeLf+/CKhU6REYIpWaLr4CKDMfCg==.sig.ed25519"},"timestamp":1573574678194,"rts":1439392020612}"#;
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Feed::from_slice(feed.as_bytes())?;
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Ok(())
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}
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}
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