Merge remote-tracking branch 'benma/bip85-2'

CHANGELOG.md

@@ -14,6 +14,7 @@ customers cannot upgrade their bootloader, its changes are recorded separately.
   For 24 words, this feature was already introduced in 9.4.0.
 - Bitcoin: don't warn about "unusual" sequence numbers in transactions anymore
 - Add EIP-1559 transaction support for Ethereum
+- Add support for deriving BIP-39 mnemonics according to BIP-85
 
 ### 9.15.0
 - Security bugfix: check index of an input's previous output to prevent the fee attack originally

messages/hww.proto

@@ -66,6 +66,7 @@ message Request {
         BTCRequest btc = 25;
         ElectrumEncryptionKeyRequest electrum_encryption_key = 26;
         CardanoRequest cardano = 27;
+        BIP85Request bip85 = 28;
     }
 }
 
@@ -87,5 +88,6 @@ message Response {
         BTCResponse btc = 13;
         ElectrumEncryptionKeyResponse electrum_encryption_key = 14;
         CardanoResponse cardano = 15;
+        BIP85Response bip85 = 16;
     }
 }

messages/keystore.proto

@@ -11,3 +11,9 @@ message ElectrumEncryptionKeyRequest {
 message ElectrumEncryptionKeyResponse {
   string key = 1;
 }
+
+message BIP85Request {
+}
+
+message BIP85Response {
+}

py/bitbox02/bitbox02/bitbox02/bitbox02.py

@@ -678,6 +678,15 @@ def electrum_encryption_key(self, keypath: Sequence[int]) -> str:
         )
         return self._msg_query(request).electrum_encryption_key.key
 
+    def bip85(self) -> None:
+        """Invokes the BIP-85 workflow on the device"""
+        self._require_atleast(semver.VersionInfo(9, 16, 0))
+
+        # pylint: disable=no-member
+        request = hww.Request()
+        request.bip85.CopyFrom(keystore.BIP85Request())
+        self._msg_query(request)
+
     def enable_mnemonic_passphrase(self) -> None:
         """
         Enable the bip39 passphrase.