From c0770ad13151a97235c9395775b8ddbabd16252a Mon Sep 17 00:00:00 2001
From: Tomas Susanka <tsusanka@gmail.com>
Date: Thu, 6 Sep 2018 14:49:11 +0200
Subject: [PATCH] cardano: remove sign/verify functions (#347)

---
 src/apps/cardano/__init__.py       |  4 +--
 src/apps/cardano/sign_message.py   | 51 ------------------------------
 src/apps/cardano/verify_message.py | 36 ---------------------
 3 files changed, 1 insertion(+), 90 deletions(-)
 delete mode 100644 src/apps/cardano/sign_message.py
 delete mode 100644 src/apps/cardano/verify_message.py

diff --git a/src/apps/cardano/__init__.py b/src/apps/cardano/__init__.py
index b571fca0b8..fc1f1328cd 100644
--- a/src/apps/cardano/__init__.py
+++ b/src/apps/cardano/__init__.py
@@ -5,6 +5,4 @@ from trezor.messages import MessageType
 def boot():
     wire.add(MessageType.CardanoGetAddress, __name__, "get_address")
     wire.add(MessageType.CardanoGetPublicKey, __name__, "get_public_key")
-    wire.add(MessageType.CardanoSignMessage, __name__, "sign_message")
-    wire.add(MessageType.CardanoVerifyMessage, __name__, "sign_transaction")
-    wire.add(MessageType.CardanoSignTx, __name__, "verify_message")
+    wire.add(MessageType.CardanoSignTx, __name__, "sign_transaction")
diff --git a/src/apps/cardano/sign_message.py b/src/apps/cardano/sign_message.py
deleted file mode 100644
index 27ae209ba1..0000000000
--- a/src/apps/cardano/sign_message.py
+++ /dev/null
@@ -1,51 +0,0 @@
-from trezor import log, ui, wire
-from trezor.crypto import bip32
-from trezor.crypto.curve import ed25519
-from trezor.messages.CardanoMessageSignature import CardanoMessageSignature
-
-from .address import _break_address_n_to_lines, derive_address_and_node
-from .layout import confirm_with_pagination
-
-from apps.common import seed, storage
-
-
-async def sign_message(ctx, msg):
-    mnemonic = storage.get_mnemonic()
-    root_node = bip32.from_mnemonic_cardano(mnemonic)
-
-    try:
-        signature = _sign_message(root_node, msg.message, msg.address_n)
-    except ValueError as e:
-        if __debug__:
-            log.exception(__name__, e)
-        raise wire.ProcessError("Signing failed")
-    mnemonic = None
-    root_node = None
-
-    if not await confirm_with_pagination(
-        ctx, msg.message, "Signing message", ui.ICON_RECEIVE, ui.GREEN
-    ):
-        raise wire.ActionCancelled("Signing cancelled")
-
-    if not await confirm_with_pagination(
-        ctx,
-        _break_address_n_to_lines(msg.address_n),
-        "With address",
-        ui.ICON_RECEIVE,
-        ui.GREEN,
-    ):
-        raise wire.ActionCancelled("Signing cancelled")
-
-    return signature
-
-
-def _sign_message(root_node, message: str, derivation_path: list):
-    address, node = derive_address_and_node(root_node, derivation_path)
-
-    signature = ed25519.sign_ext(node.private_key(), node.private_key_ext(), message)
-
-    sig = CardanoMessageSignature()
-    sig.public_key = seed.remove_ed25519_prefix(node.public_key())
-    sig.signature = signature
-
-    return sig
diff --git a/src/apps/cardano/verify_message.py b/src/apps/cardano/verify_message.py
deleted file mode 100644
index 422e197ec2..0000000000
--- a/src/apps/cardano/verify_message.py
+++ /dev/null
@@ -1,36 +0,0 @@
-from ubinascii import hexlify
-
-from trezor import log, ui, wire
-from trezor.crypto.curve import ed25519
-from trezor.messages.Failure import Failure
-from trezor.messages.Success import Success
-
-from .layout import confirm_with_pagination
-
-
-async def verify_message(ctx, msg):
-    try:
-        res = _verify_message(msg.public_key, msg.signature, msg.message)
-    except ValueError as e:
-        if __debug__:
-            log.exception(__name__, e)
-        raise wire.ProcessError("Verifying failed")
-
-    if not res:
-        return Failure(message="Invalid signature")
-
-    if not await confirm_with_pagination(
-        ctx, msg.message, "Verifying message", ui.ICON_RECEIVE, ui.GREEN
-    ):
-        raise wire.ActionCancelled("Verifying cancelled")
-
-    if not await confirm_with_pagination(
-        ctx, hexlify(msg.public_key), "With public key", ui.ICON_RECEIVE, ui.GREEN
-    ):
-        raise wire.ActionCancelled("Verifying cancelled")
-
-    return Success(message="Message verified")
-
-
-def _verify_message(public_key: bytes, signature: bytes, message: str):
-    return ed25519.verify(public_key, signature, message)