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|
use std::io::Cursor;
use p256::{
ecdsa::SigningKey,
pkcs8::{DecodePrivateKey as _, EncodePrivateKey as _, LineEnding},
};
use sqlx::{Sqlite, SqliteConnection, Transaction};
use web_push::{PartialVapidSignatureBuilder, VapidSignatureBuilder};
use super::{
History,
event::{Changed, Event},
};
use crate::{
clock::DateTime,
db::NotFound,
event::{Instant, Sequence},
};
pub trait Provider {
fn vapid(&mut self) -> Vapid<'_>;
}
impl Provider for Transaction<'_, Sqlite> {
fn vapid(&mut self) -> Vapid<'_> {
Vapid(self)
}
}
pub struct Vapid<'a>(&'a mut SqliteConnection);
impl Vapid<'_> {
pub async fn record_events(
&mut self,
events: impl IntoIterator<Item = Event>,
) -> Result<(), sqlx::Error> {
for event in events {
self.record_event(&event).await?;
}
Ok(())
}
pub async fn record_event(&mut self, event: &Event) -> Result<(), sqlx::Error> {
match event {
Event::Changed(changed) => self.record_changed(changed).await,
}
}
async fn record_changed(&mut self, changed: &Changed) -> Result<(), sqlx::Error> {
sqlx::query!(
r#"
insert into vapid_key (changed_at, changed_sequence)
values ($1, $2)
"#,
changed.instant.at,
changed.instant.sequence,
)
.execute(&mut *self.0)
.await?;
Ok(())
}
pub async fn clear(&mut self) -> Result<(), sqlx::Error> {
sqlx::query!(
r#"
delete from vapid_key
"#
)
.execute(&mut *self.0)
.await?;
sqlx::query!(
r#"
delete from vapid_signing_key
"#
)
.execute(&mut *self.0)
.await?;
Ok(())
}
pub async fn store_signing_key(&mut self, key: &SigningKey) -> Result<(), Error> {
let key = key.to_pkcs8_pem(LineEnding::CRLF)?;
let key = key.as_str();
sqlx::query!(
r#"
insert into vapid_signing_key (key)
values ($1)
"#,
key,
)
.execute(&mut *self.0)
.await?;
Ok(())
}
pub async fn current(&mut self) -> Result<History, Error> {
let key = sqlx::query!(
r#"
select
key.changed_at as "changed_at: DateTime",
key.changed_sequence as "changed_sequence: Sequence",
signing.key
from vapid_key as key
join vapid_signing_key as signing
"#
)
.map(|row| {
let key = SigningKey::from_pkcs8_pem(&row.key)?;
let key = key.verifying_key().to_owned();
let changed = Instant::new(row.changed_at, row.changed_sequence);
Ok::<_, Error>(History { key, changed })
})
.fetch_one(&mut *self.0)
.await??;
Ok(key)
}
pub async fn signer(&mut self) -> Result<PartialVapidSignatureBuilder, Error> {
let key = sqlx::query_scalar!(
r#"
select key
from vapid_signing_key
"#
)
.fetch_one(&mut *self.0)
.await?;
let key = Cursor::new(&key);
let signer = VapidSignatureBuilder::from_pem_no_sub(key)?;
Ok(signer)
}
}
#[derive(Debug, thiserror::Error)]
#[error(transparent)]
pub enum Error {
Ecdsa(#[from] p256::ecdsa::Error),
Pkcs8(#[from] p256::pkcs8::Error),
WebPush(#[from] web_push::WebPushError),
Database(#[from] sqlx::Error),
}
impl<T> NotFound for Result<T, Error> {
type Ok = T;
type Error = Error;
fn optional(self) -> Result<Option<T>, Error> {
match self {
Ok(value) => Ok(Some(value)),
Err(Error::Database(sqlx::Error::RowNotFound)) => Ok(None),
Err(other) => Err(other),
}
}
}
|
