feat(trezorctl): Implement device authenticate command.

python/.changelog.d/3255.added

@@ -0,0 +1 @@
+Implement device authenticate command.

python/src/trezorlib/cli/device.py

@@ -14,6 +14,7 @@
 # You should have received a copy of the License along with this library.
 # If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
 
+import secrets
 import sys
 from typing import TYPE_CHECKING, Optional, Sequence
 
@@ -331,3 +332,19 @@ def set_busy(
         )
 
     return device.set_busy(client, expiry * 1000)
+
+
+@cli.command()
+@click.argument("hex_challenge", required=False)
+@with_client
+def authenticate(client: "TrezorClient", hex_challenge: Optional[str]) -> None:
+    """Get information to verify the authenticity of the device."""
+    if hex_challenge is None:
+        hex_challenge = secrets.token_hex(32)
+    click.echo(f"Challenge: {hex_challenge}")
+    challenge = bytes.fromhex(hex_challenge)
+    msg = device.authenticate(client, challenge)
+    click.echo(f"Signature of challenge: {msg.signature.hex()}")
+    click.echo(f"Device certificate: {msg.certificates[0].hex()}")
+    for cert in msg.certificates[1:]:
+        click.echo(f"CA certificate: {cert.hex()}")

python/src/trezorlib/device.py

@@ -265,3 +265,8 @@ def set_busy(client: "TrezorClient", expiry_ms: Optional[int]) -> "MessageType":
     ret = client.call(messages.SetBusy(expiry_ms=expiry_ms))
     client.refresh_features()
     return ret
+
+
+@expect(messages.AuthenticityProof)
+def authenticate(client: "TrezorClient", challenge: bytes):
+    return client.call(messages.AuthenticateDevice(challenge=challenge))