crypto: Add a method to manually verify our own user identity

matrix_sdk_crypto/src/identities/user.rs

@@ -32,11 +32,15 @@ use ruma::{
 };
 use serde::{Deserialize, Serialize};
 use serde_json::to_value;
+use tracing::error;
 
 use super::{atomic_bool_deserializer, atomic_bool_serializer};
 use crate::{
-    error::SignatureError, olm::Utility, verification::VerificationMachine, CryptoStoreError,
-    OutgoingVerificationRequest, ReadOnlyDevice, VerificationRequest,
+    error::SignatureError,
+    olm::Utility,
+    store::{Changes, IdentityChanges},
+    verification::VerificationMachine,
+    CryptoStoreError, OutgoingVerificationRequest, ReadOnlyDevice, VerificationRequest,
 };
 
 /// Enum over the different user identity types we can have.
@@ -103,6 +107,27 @@ impl Deref for OwnUserIdentity {
 }
 
 impl OwnUserIdentity {
+    /// Mark our user identity as verified.
+    ///
+    /// This will mark the identity locally as verified and sign it with our own
+    /// device.
+    ///
+    /// Returns a signature upload request that needs to be sent out.
+    pub async fn verify(&self) -> Result<SignatureUploadRequest, SignatureError> {
+        self.mark_as_verified();
+
+        let changes = Changes {
+            identities: IdentityChanges { changed: vec![self.inner.clone().into()], new: vec![] },
+            ..Default::default()
+        };
+
+        if let Err(e) = self.verification_machine.store.save_changes(changes).await {
+            error!(error =? e, "Couldn't store our own user identity after marking it as verified");
+        }
+
+        self.verification_machine.store.account.sign_master_key(self.master_key.clone()).await
+    }
+
     /// Send a verification request to our other devices.
     pub async fn request_verification(
         &self,
@@ -680,7 +705,7 @@ impl ReadOnlyUserIdentity {
     ///
     /// Returns a `SignatureError` if the self signing key fails to be correctly
     /// verified by the given master key.
-    pub fn new(
+    pub(crate) fn new(
         master_key: MasterPubkey,
         self_signing_key: SelfSigningPubkey,
     ) -> Result<Self, SignatureError> {
@@ -690,7 +715,7 @@ impl ReadOnlyUserIdentity {
     }
 
     #[cfg(test)]
-    pub async fn from_private(identity: &crate::olm::PrivateCrossSigningIdentity) -> Self {
+    pub(crate) async fn from_private(identity: &crate::olm::PrivateCrossSigningIdentity) -> Self {
         let master_key = identity.master_key.lock().await.as_ref().unwrap().public_key.clone();
         let self_signing_key =
             identity.self_signing_key.lock().await.as_ref().unwrap().public_key.clone();
@@ -747,7 +772,7 @@ impl ReadOnlyUserIdentity {
     ///
     /// Returns an empty result if the signature check succeeded, otherwise a
     /// SignatureError indicating why the check failed.
-    pub fn is_device_signed(&self, device: &ReadOnlyDevice) -> Result<(), SignatureError> {
+    pub(crate) fn is_device_signed(&self, device: &ReadOnlyDevice) -> Result<(), SignatureError> {
         if self.user_id() != device.user_id() {
             return Err(SignatureError::UserIdMissmatch);
         }
@@ -790,7 +815,7 @@ impl ReadOnlyOwnUserIdentity {
     ///
     /// Returns a `SignatureError` if the self signing key fails to be correctly
     /// verified by the given master key.
-    pub fn new(
+    pub(crate) fn new(
         master_key: MasterPubkey,
         self_signing_key: SelfSigningPubkey,
         user_signing_key: UserSigningPubkey,
@@ -836,7 +861,7 @@ impl ReadOnlyOwnUserIdentity {
     ///
     /// Returns an empty result if the signature check succeeded, otherwise a
     /// SignatureError indicating why the check failed.
-    pub fn is_identity_signed(
+    pub(crate) fn is_identity_signed(
         &self,
         identity: &ReadOnlyUserIdentity,
     ) -> Result<(), SignatureError> {
@@ -855,7 +880,7 @@ impl ReadOnlyOwnUserIdentity {
     ///
     /// Returns an empty result if the signature check succeeded, otherwise a
     /// SignatureError indicating why the check failed.
-    pub fn is_device_signed(&self, device: &ReadOnlyDevice) -> Result<(), SignatureError> {
+    pub(crate) fn is_device_signed(&self, device: &ReadOnlyDevice) -> Result<(), SignatureError> {
         if self.user_id() != device.user_id() {
             return Err(SignatureError::UserIdMissmatch);
         }
@@ -886,7 +911,7 @@ impl ReadOnlyOwnUserIdentity {
     /// * `user_signing_key` - The new user signing key of user identity.
     ///
     /// Returns a `SignatureError` if we failed to update the identity.
-    pub fn update(
+    pub(crate) fn update(
         &mut self,
         master_key: MasterPubkey,
         self_signing_key: SelfSigningPubkey,

matrix_sdk_crypto/src/lib.rs

@@ -54,7 +54,7 @@ pub(crate) use olm::ReadOnlyAccount;
 pub use olm::{CrossSigningStatus, EncryptionSettings};
 pub use requests::{
     IncomingResponse, KeysQueryRequest, OutgoingRequest, OutgoingRequests,
-    OutgoingVerificationRequest, RoomMessageRequest, ToDeviceRequest,
+    OutgoingVerificationRequest, RoomMessageRequest, ToDeviceRequest, UploadSigningKeysRequest,
 };
 pub use store::{CrossSigningKeyExport, CryptoStoreError, SecretImportError};
 pub use verification::{

matrix_sdk_crypto/src/olm/account.rs

@@ -32,7 +32,7 @@ use olm_rs::{
 };
 use ruma::{
     api::client::r0::keys::{upload_keys, upload_signatures::Request as SignatureUploadRequest},
-    encryption::{DeviceKeys, OneTimeKey, SignedKey},
+    encryption::{CrossSigningKey, DeviceKeys, OneTimeKey, SignedKey},
     events::{
         room::encrypted::{EncryptedEventScheme, EncryptedToDeviceEventContent},
         AnyToDeviceEvent, ToDeviceEvent,
@@ -52,11 +52,11 @@ use super::{
 };
 use crate::{
     error::{EventError, OlmResult, SessionCreationError},
-    identities::ReadOnlyDevice,
+    identities::{MasterPubkey, ReadOnlyDevice},
     requests::UploadSigningKeysRequest,
     store::{Changes, Store},
     utilities::encode,
-    OlmError,
+    OlmError, SignatureError,
 };
 
 #[derive(Debug, Clone)]
@@ -761,6 +761,42 @@ impl ReadOnlyAccount {
         PrivateCrossSigningIdentity::new_with_account(self).await
     }
 
+    pub(crate) async fn sign_cross_signing_key(
+        &self,
+        cross_signing_key: &mut CrossSigningKey,
+    ) -> Result<(), SignatureError> {
+        let signature = self.sign_json(serde_json::to_value(&cross_signing_key)?).await;
+
+        cross_signing_key
+            .signatures
+            .entry(self.user_id().to_owned())
+            .or_insert_with(BTreeMap::new)
+            .insert(
+                DeviceKeyId::from_parts(DeviceKeyAlgorithm::Ed25519, self.device_id()).to_string(),
+                signature,
+            );
+
+        Ok(())
+    }
+
+    pub(crate) async fn sign_master_key(
+        &self,
+        master_key: MasterPubkey,
+    ) -> Result<SignatureUploadRequest, SignatureError> {
+        let public_key =
+            master_key.get_first_key().ok_or(SignatureError::MissingSigningKey)?.to_string();
+        let mut cross_signing_key = master_key.into();
+        self.sign_cross_signing_key(&mut cross_signing_key).await?;
+
+        let mut signed_keys = BTreeMap::new();
+        signed_keys
+            .entry(self.user_id().to_owned())
+            .or_insert_with(BTreeMap::new)
+            .insert(public_key, serde_json::to_value(cross_signing_key)?);
+
+        Ok(SignatureUploadRequest::new(signed_keys))
+    }
+
     /// Convert a JSON value to the canonical representation and sign the JSON
     /// string.
     ///

matrix_sdk_crypto/src/olm/signing/mod.rs

@@ -28,7 +28,7 @@ use ruma::{
     api::client::r0::keys::upload_signatures::Request as SignatureUploadRequest,
     encryption::{DeviceKeys, KeyUsage},
     events::secret::request::SecretName,
-    DeviceKeyAlgorithm, DeviceKeyId, UserId,
+    UserId,
 };
 use serde::{Deserialize, Serialize};
 use serde_json::Error as JsonError;
@@ -379,22 +379,11 @@ impl PrivateCrossSigningIdentity {
 
         let mut public_key =
             master.cross_signing_key(account.user_id().to_owned(), KeyUsage::Master);
-        let signature = account
-            .sign_json(
-                serde_json::to_value(&public_key)
-                    .expect("Can't convert own public master key to json"),
-            )
-            .await;
 
-        public_key
-            .signatures
-            .entry(account.user_id().to_owned())
-            .or_insert_with(BTreeMap::new)
-            .insert(
-                DeviceKeyId::from_parts(DeviceKeyAlgorithm::Ed25519, account.device_id())
-                    .to_string(),
-                signature,
-            );
+        account
+            .sign_cross_signing_key(&mut public_key)
+            .await
+            .expect("Can't sign our freshly created master key with our account");
 
         let master = MasterSigning { inner: master, public_key: public_key.into() };