Simplify DIDComm unpack(), use Key instead of String (#1310)

* feat: adjusted encryption envelope to use key references instead of base58 strings

Signed-off-by: James Ebert <jamesebert.k@gmail.com>

* feat: refactor didcomm unpack() to be streamlined and to use keys instead of strings

Signed-off-by: James Ebert <jamesebert.k@gmail.com>

* chore: adjust iterator

Signed-off-by: James Ebert <jamesebert.k@gmail.com>

* revert iter() change

Signed-off-by: James Ebert <jamesebert.k@gmail.com>

* chore: clippy

Signed-off-by: James Ebert <jamesebert.k@gmail.com>

* chore: improve borrowing

Signed-off-by: James Ebert <jamesebert.k@gmail.com>

* chore: clippy tests

Signed-off-by: James Ebert <jamesebert.k@gmail.com>

---------

Signed-off-by: James Ebert <jamesebert.k@gmail.com>

aries/agents/aath-backchannel/src/controllers/didcomm.rs

@@ -215,9 +215,10 @@ impl HarnessAgent {
     }
 
     pub async fn receive_message(&self, payload: Vec<u8>) -> HarnessResult<HttpResponse> {
-        let (message, sender_vk, recipient_vk) = EncryptionEnvelope::anon_unpack_aries_msg(
+        let (message, sender_vk, recipient_vk) = EncryptionEnvelope::unpack_aries_msg(
             self.aries_agent.wallet().as_ref(),
-            payload.clone(),
+            &payload,
+            &None,
         )
         .await?;
         let sender_vk = sender_vk.ok_or_else(|| {
@@ -245,22 +246,32 @@ impl HarnessAgent {
                 }
             }
             AriesMessage::TrustPing(TrustPing::Ping(msg)) => {
-                let connection_id = self.aries_agent.connections().get_by_sender_vk(sender_vk)?;
+                let connection_id = self
+                    .aries_agent
+                    .connections()
+                    .get_by_sender_vk(sender_vk.base58())?;
                 self.aries_agent
                     .connections()
                     .process_trust_ping(msg, &connection_id)
                     .await?
             }
             AriesMessage::Connection(msg) => self.handle_connection_msg(msg).await?,
             AriesMessage::CredentialIssuance(msg) => {
-                let connection_id = self.aries_agent.connections().get_by_sender_vk(sender_vk)?;
+                let connection_id = self
+                    .aries_agent
+                    .connections()
+                    .get_by_sender_vk(sender_vk.base58())?;
                 self.handle_issuance_msg(msg, &connection_id).await?
             }
             AriesMessage::DidExchange(msg) => {
-                self.handle_did_exchange_msg(msg, recipient_vk).await?
+                self.handle_did_exchange_msg(msg, recipient_vk.base58())
+                    .await?
             }
             AriesMessage::PresentProof(msg) => {
-                let connection_id = self.aries_agent.connections().get_by_sender_vk(sender_vk)?;
+                let connection_id = self
+                    .aries_agent
+                    .connections()
+                    .get_by_sender_vk(sender_vk.base58())?;
                 self.handle_presentation_msg(msg, &connection_id).await?
             }
             m => {

aries/aries_vcx/src/utils/didcomm_utils.rs

@@ -36,7 +36,7 @@ pub(crate) fn resolve_service_key_to_typed_key(
 
 /// Resolves the first ed25519 base58 public key (a.k.a. verkey) within the DIDDocuments key
 /// agreement keys. Useful for resolving keys that can be used for packing DIDCommV1 messages.
-pub fn resolve_ed25519_base58_key_agreement(did_document: &DidDocument) -> VcxResult<String> {
+pub fn resolve_ed25519_key_agreement(did_document: &DidDocument) -> VcxResult<Key> {
     let vm_types = [
         VerificationMethodType::Ed25519VerificationKey2018,
         VerificationMethodType::Ed25519VerificationKey2020,
@@ -50,58 +50,58 @@ pub fn resolve_ed25519_base58_key_agreement(did_document: &DidDocument) -> VcxRe
     let vm = did_document.get_key_agreement_of_type(&vm_types)?;
     let key = vm.public_key()?;
 
-    match key.key_type() {
-        KeyType::Ed25519 => {}
-        _ => {
-            return Err(AriesVcxError::from_msg(
-                AriesVcxErrorKind::InvalidVerkey,
-                format!("Cannot resolve key agreement as an Ed25519 key: {vm:?}"),
-            ))
-        }
-    }
-
-    Ok(vm.public_key()?.base58())
+    Ok(key.validate_key_type(KeyType::Ed25519)?.to_owned())
 }
 
-pub fn get_ed25519_base58_routing_keys(
+pub fn get_ed25519_routing_keys(
     their_did_doc: &DidDocument,
     service_id: &Uri,
-) -> VcxResult<Vec<String>> {
+) -> VcxResult<Vec<Key>> {
     let service = their_did_doc.get_service_by_id(service_id)?;
     let Ok(routing_keys) = service.extra_field_routing_keys() else {
         return Ok(vec![]);
     };
 
-    let mut naked_routing_keys = Vec::new();
+    let mut ed25519_routing_keys = Vec::new();
 
     for key in routing_keys.iter() {
         let pub_key = resolve_service_key_to_typed_key(key, their_did_doc)?;
 
         if pub_key.key_type() == &KeyType::Ed25519 {
-            naked_routing_keys.push(pub_key.base58());
+            ed25519_routing_keys.push(pub_key);
+        } else {
+            warn!(
+                "Unexpected key with type {} in routing keys list",
+                pub_key.key_type()
+            );
         }
     }
 
-    Ok(naked_routing_keys)
+    Ok(ed25519_routing_keys)
 }
 
-pub fn get_ed25519_base58_recipient_keys(
+pub fn get_ed25519_recipient_keys(
     their_did_doc: &DidDocument,
     service_id: &Uri,
-) -> VcxResult<Vec<String>> {
+) -> VcxResult<Vec<Key>> {
     let service = their_did_doc.get_service_by_id(service_id)?;
     let Ok(recipient_keys) = service.extra_field_recipient_keys() else {
         return Ok(vec![]);
     };
 
-    let mut naked_recipient_keys = Vec::new();
+    let mut ed25519_recipient_keys = Vec::new();
 
     for key in recipient_keys.iter() {
         let pub_key = resolve_service_key_to_typed_key(key, their_did_doc)?;
         if pub_key.key_type() == &KeyType::Ed25519 {
-            naked_recipient_keys.push(pub_key.base58());
+            ed25519_recipient_keys.push(pub_key);
+        } else {
+            warn!(
+                "Unexpected key with type {} in recipient keys list",
+                pub_key.key_type()
+            );
         }
     }
 
-    Ok(naked_recipient_keys)
+    Ok(ed25519_recipient_keys)
 }