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use super::Error;
use super::request_builder::{DwnRequest, DwnItem};
use super::router::{DwnResponse, Packet};
use crate::dids::signing::Verifier;
use crate::dids::{
DefaultDidResolver,
DidKeyPurpose,
DhtDocument,
DidResolver,
DidKeyPair,
DidMethod,
DidKey,
Did
};
use crate::ed25519::SecretKey as EdSecretKey;
use simple_crypto::SecretKey;
//use simple_database::database::{FiltersBuilder, UuidKeyed, CmpType, Filter};
use simple_database::{KeyValueStore, Indexable, Database};
use std::collections::BTreeMap;
use std::path::PathBuf;
use serde::{Serialize, Deserialize};
use futures::future;
use uuid::Uuid;
#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
pub struct ServerIdentity {
did_key: EdSecretKey,
com_key: DidKeyPair,
sig_key: SecretKey
}
impl ServerIdentity {
pub fn new(service_endpoints: Vec<String>) -> Result<(Self, DhtDocument), Error> {
let did_key = EdSecretKey::new();
let did_pub = did_key.public_key();
let com = SecretKey::new();
let com_pub = com.public_key();
let com_key = DidKeyPair::new(com, DidKey::new(
Some("com".to_string()),
Did::new(DidMethod::DHT, did_key.public_key().thumbprint()),
com_pub.clone(),
vec![DidKeyPurpose::Auth, DidKeyPurpose::Asm, DidKeyPurpose::Agm],
None
)).unwrap();
let sig_key = SecretKey::new();
let sig_pub = sig_key.public_key();
Ok((
ServerIdentity{did_key, com_key, sig_key},
DhtDocument::default(did_pub, sig_pub, com_pub, service_endpoints)?
))
}
}
//pub type DM = UuidKeyed<DwnItem>;
#[derive(Clone)]
pub struct Dwn {
pub com_key: DidKeyPair,
pub private_database: Database,
pub public_database: Database,
pub dms_database: Database,
pub did_resolver: Box<dyn DidResolver>,
}
impl Dwn {
pub async fn new<KVS: KeyValueStore + 'static>(
server_identity: ServerIdentity,
data_path: Option<PathBuf>,
did_resolver: Option<Box<dyn DidResolver>>,
) -> Result<Self, Error> {
let data_path = data_path.unwrap_or(PathBuf::from("Dwn"));
let did_resolver = did_resolver.unwrap_or(Box::new(
DefaultDidResolver::new::<KVS>(Some(data_path.join("DefaultDidResolver"))).await?
));
Ok(Dwn{
com_key: server_identity.com_key,
private_database: Database::new::<KVS>(data_path.join("DATABASE").join("PRIVATE")).await?,
public_database: Database::new::<KVS>(data_path.join("DATABASE").join("PUBLIC")).await?,
dms_database: Database::new::<KVS>(data_path.join("DATABASE").join("DMS")).await?,
did_resolver,
})
}
pub async fn process_packet(
&self, packet: Packet
) -> Result<BTreeMap<Uuid, DwnResponse>, Error> {
if packet.recipient != self.com_key.public.did {
Err(Error::bad_request("Packet Not Addressed To Tenant"))
} else {
let payload = self.com_key.secret.decrypt(&packet.payload)?;
let reqs = serde_json::from_slice::<BTreeMap<Uuid, DwnRequest>>(&payload)?;
Ok(BTreeMap::from_iter(future::try_join_all(reqs.into_iter().map(|(uuid, req)| async move {
Ok::<(Uuid, DwnResponse), Error>((uuid, self.process_request(req).await?))
})).await?))
}
// if let Ok(packet) = serde_json::from_slice::<Packet>(&payload) {
// Box::pin(async move {self.process_packet(packet).await}).await
// } else if let Ok(req) = serde_json::from_slice::<DwnRequest>(&payload) {
// self.process_request(req).await?;
// } else {
// Error::bad_request("dwn.process_packet", "Packet Could not be proccessed").into()
// }
//} else {
// todo!()
// //tokio::spawn(self.send_packet(self.did_resolver.clone(), packet));
// //return Ok(DwnResponse::new(303, "Forwarded", Vec::new()));
//}
}
pub async fn process_request(&self, request: DwnRequest) -> Result<DwnResponse, Error> {
Ok(match request {
DwnRequest::CreatePrivate(item) => {
if self.private_database.get::<DwnItem>(&item.primary_key()).await?.is_some() {
DwnResponse::Conflict
} else {
self.private_database.set(&item).await?;
DwnResponse::Empty
}
},
DwnRequest::ReadPrivate(signed) => {
if let Ok(Verifier::Right(discover)) = signed.verify(&*self.did_resolver, None).await {
DwnResponse::ReadPrivate(self.private_database.get::<DwnItem>(&discover.to_vec()).await?)
} else {DwnResponse::InvalidAuth("Signature".to_string())}
},
DwnRequest::UpdatePrivate(item) => {
if let Ok(Verifier::Right(key)) = item.verify(&*self.did_resolver, None).await {
let item = item.unwrap();
if let Some(old_item) = self.private_database.get::<DwnItem>(&item.discover.to_vec()).await? {
if old_item.delete != Some(key) {
return Ok(DwnResponse::InvalidAuth("Delete".to_string()));
}
}
self.private_database.set(&item).await?;
DwnResponse::Empty
} else {DwnResponse::InvalidAuth("Signature".to_string())}
},
DwnRequest::DeletePrivate(discover) => {
if let Ok(Verifier::Right(delete)) = discover.verify(&*self.did_resolver, None).await {
let discover = discover.unwrap();
if let Some(old_item) = self.private_database.get::<DwnItem>(&discover.to_vec()).await? {
if old_item.delete != Some(delete) {
return Ok(DwnResponse::InvalidAuth("Delete".to_string()));
}
self.private_database.delete(&discover.to_vec()).await?;
}
DwnResponse::Empty
} else {DwnResponse::InvalidAuth("Signature".to_string())}
}
})
// Type::Public => {
// match &request.action {
// Action::Create => {
// let public_record = serde_json::from_slice::<PublicCreateRequest>(&request.payload)?;
// public_record.inner.verify(&*self.did_resolver, None).await?;
// if self.public_database.get::<PublicRecord>(&public_record.primary_key()).await?.is_some() {
// return conflict();
// }
// self.public_database.set(&public_record).await?;
// empty_success()
// },
// Action::Read => {
// let (filters, sort_options) = serde_json::from_slice::<PublicReadRequest>(&request.payload)?;
// let results = Some(self.public_database.query::<PublicRecord>(&filters, sort_options).await?.0)
// .filter(|i| !i.is_empty())
// .map(|i| serde_json::to_vec(&i)).transpose()?;
// Ok(DwnResponse::new(200, "", results))
// },
// Action::Update => {
// let public_record = serde_json::from_slice::<PublicUpdateRequest>(&request.payload)?;
// let verifier = public_record.inner.verify(&*self.did_resolver, None).await?;
// if let Some(old_record) = self.public_database.get::<PublicRecord>(&public_record.primary_key()).await? {
// if old_record.inner.verify(&*self.did_resolver, Some(&verifier)).await.is_err() {
// return auth_failed();
// }
// }
// self.public_database.set(&public_record).await?;
// empty_success()
// }
// Action::Delete => {
// let payload = serde_json::from_slice::<PublicDeleteRequest>(&request.payload)?;
// let verifier = payload.verify(&*self.did_resolver, None).await?;
// let primary_key = payload.inner().as_bytes();
// if let Some(old_record) = self.public_database.get::<PublicRecord>(primary_key).await? {
// if old_record.inner.verify(&*self.did_resolver, Some(&verifier)).await.is_err() {
// return auth_failed();
// }
// self.public_database.delete(primary_key).await?;
// }
// empty_success()
// }
// }
// },
// Type::DM => {
// match &request.action {
// Action::Create => {
// let item = serde_json::from_slice::<DMCreateRequest>(&request.payload)?;
// let dm = UuidKeyed::new(item);
// if self.dms_database.get::<DM>(&dm.primary_key()).await?.is_some() {
// return conflict();
// }
// self.dms_database.set(&dm).await?;
// empty_success()
// },
// Action::Read => {
// let payload = serde_json::from_slice::<DMReadRequest>(&request.payload)?;
// if let Ok(Verifier::Right(key)) = payload.verify(&*self.did_resolver, None).await {
// let timestamp = payload.unwrap();
// let filters = FiltersBuilder::build(vec![
// ("timestamp_stored", Filter::cmp(CmpType::GT, timestamp)),
// ("discover", Filter::equal(key.to_vec()))
// ]);
// let results = Some(self.dms_database.query::<DM>(&filters, None).await?.0
// .into_iter().map(|dm| dm.inner()).collect::<Vec<DwnItem>>())
// .filter(|i| !i.is_empty())
// .map(|i| serde_json::to_vec(&i)).transpose()?;
// Ok(DwnResponse::new(200, "", results))
// } else {auth_failed()}
// },
// _ => Err(Error::err("DwnServer", "Unsupported method for DMs"))
// }
// }
//}
}
pub async fn debug(&self) -> Result<String, Error> {
Ok(
self.com_key.public.did.to_string()+"\n"+
&self.private_database.debug().await?+
&self.public_database.debug().await?+
&self.dms_database.debug().await?
)
}
}
impl std::fmt::Debug for Dwn {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let mut fmt = f.debug_struct("Dwn");
fmt.field("tenant", &self.com_key.public.did.to_string())
.field("private_database", &self.private_database)
.field("public_database", &self.public_database)
.field("dms", &self.dms_database)
.finish()
}
}