Add DecryptionErrorCode::MismatchedSender.

Update the SDK to 6ab11a032, which includes matrix-rust-sdk#5219, whihch adds a
new VerificationLevel for mismatched senders. We expose this to the application
via a new DecryptionErrorCode.

Author: richvdh

CHANGELOG.md

@@ -1,6 +1,8 @@
 # UNRELEASED
 
--   Update matrix-rust-sdk to `0e9ce0271`.
+-   Update matrix-rust-sdk to `6ab11a032`.
+
+-   Add a new error code for `MegolmDecryptionError`, `DecryptionErrorCode::MismatchedSender`, indicating that the sender of the event does not match the owner of the device that established the Megolm session. ([#248](https://github.com/matrix-org/matrix-rust-sdk-crypto-wasm/pull/248))
 
 # matrix-sdk-crypto-wasm v15.0.0
 

Cargo.lock

@@ -64,9 +64,9 @@ futures-util = "0.3.27"
 getrandom = { version = "0.3.0", features = ["wasm_js"] }
 http = "1.1.0"
 js-sys = "0.3.49"
-matrix-sdk-common = { git = "https://github.com/matrix-org/matrix-rust-sdk", rev = "0e9ce0271", features = ["js"] }
-matrix-sdk-indexeddb = { git = "https://github.com/matrix-org/matrix-rust-sdk", rev = "0e9ce0271", default-features = false, features = ["e2e-encryption"] }
-matrix-sdk-qrcode = { git = "https://github.com/matrix-org/matrix-rust-sdk", rev = "0e9ce0271", optional = true }
+matrix-sdk-common = { git = "https://github.com/matrix-org/matrix-rust-sdk", rev = "6ab11a032", features = ["js"] }
+matrix-sdk-indexeddb = { git = "https://github.com/matrix-org/matrix-rust-sdk", rev = "6ab11a032", default-features = false, features = ["e2e-encryption"] }
+matrix-sdk-qrcode = { git = "https://github.com/matrix-org/matrix-rust-sdk", rev = "6ab11a032", optional = true }
 serde = "1.0.91"
 serde_json = "1.0.91"
 serde-wasm-bindgen = "0.6.5"
@@ -84,7 +84,7 @@ vergen-gitcl = { version = "1.0.0", features = ["build"] }
 
 [dependencies.matrix-sdk-crypto]
 git = "https://github.com/matrix-org/matrix-rust-sdk"
-rev = "0e9ce0271"
+rev = "6ab11a032"
 default-features = false
 features = ["js", "automatic-room-key-forwarding"]
 

Cargo.toml

@@ -26,6 +26,9 @@ pub enum DecryptionErrorCode {
     SenderIdentityVerificationViolation,
     /// Other failure.
     UnableToDecrypt,
+    /// The `sender` field on the event does not match the owner of the device
+    /// that established the Megolm session.
+    MismatchedSender,
 }
 
 /// Js Decryption error with code.
@@ -92,6 +95,9 @@ impl From<MegolmError> for MegolmDecryptionError {
                     warn!("Unexpected verification level in megolm decryption error {}", value);
                     decryption_error(DecryptionErrorCode::UnableToDecrypt, None)
                 }
+                VerificationLevel::MismatchedSender => {
+                    decryption_error(DecryptionErrorCode::MismatchedSender, None)
+                }
             },
             _ => decryption_error(DecryptionErrorCode::UnableToDecrypt, None),
         }