add layout to u2f app

src/apps/fido_u2f/__init__.py

@@ -0,0 +1,2 @@
+def boot():
+    pass

src/apps/fido_u2f/knownapps.py

@@ -1,8 +1,10 @@
+from trezor.crypto import hashlib
+
 knownapps = {
-    b'12743b921297b77f1135e41fdedd4a846afe82e1f36932a9912f3b0d8dfb7d0e': 'Bitbucket',  # https://bitbucket.org
-    b'c50f8a7b708e92f82e7a50e2bdc55d8fd91a22fe6b29c0cdf7805530842af581': 'Dropbox',    # https://www.dropbox.com/u2f-app-id.json
-    b'70617dfed065863af47c15556c91798880828cc407fdf70ae85011569465a075': 'Github',     # https://github.com/u2f/trusted_facets
-    b'e7be96a51bd0192a72840d2e5909f72ba82a2fe93faa624f03396b30e494c804': 'Gitlab',     # https://gitlab.com
-    b'a54672b222c4cf95e151ed8d4d3c767a6cc349435943794e884f3d023a8229fd': 'Google',     # https://www.gstatic.com/securitykey/origins.json
-    b'08b2a3d41939aa31668493cb36cdcc4f16c4d9b4c8238b73c2f672c033007197': 'Slush Pool', # https://slushpool.com/static/security/u2f.json
+    hashlib.sha256(b'https://bitbucket.org').digest()                            : 'Bitbucket',
+    hashlib.sha256(b'https://www.dropbox.com/u2f-app-id.json').digest()          : 'Dropbox',
+    hashlib.sha256(b'https://github.com/u2f/trusted_facets').digest()            : 'GitHub',
+    hashlib.sha256(b'https://gitlab.com').digest()                               : 'GitLab',
+    hashlib.sha256(b'https://www.gstatic.com/securitykey/origins.json').digest() : 'Google',
+    hashlib.sha256(b'https://slushpool.com/static/security/u2f.json').digest()   : 'Slush Pool',
 }

src/apps/fido_u2f/layout_u2f.py

@@ -0,0 +1,34 @@
+from ubinascii import hexlify
+from trezor import ui, loop, res
+from trezor.utils import unimport_gen
+from trezor.crypto import random
+from . import knownapps
+
+ids = list(knownapps.knownapps.keys())
+random.shuffle(ids)
+
+appid = ids[0]
+action = 'Register'
+
+@unimport_gen
+def layout_u2f():
+
+    if appid in knownapps.knownapps:
+        appname = knownapps.knownapps[appid]
+        appicon = res.load('apps/fido_u2f/res/u2f_%s.toif' % appname.lower().replace(' ', '_'))
+    else:
+        appname = hexlify(appid[:4]) + '...' + hexlify(appid[-4:])
+        appicon = res.load('apps/fido_u2f/res/u2f_unknown.toif')
+
+    # paint background black
+    ui.display.bar(0, 0, 240, 240, ui.BLACK)
+
+    # top header bar
+    ui.display.text(10, 28, 'U2F Login', ui.BOLD, ui.PM_BLUE, ui.BLACK)
+
+    # content
+    ui.display.text_center(120, 70, '%s:' % action, ui.BOLD, ui.GREY, ui.BLACK)
+    ui.display.image((240 - 64) // 2, 90, appicon)
+    ui.display.text_center(120, 185, appname, ui.MONO, ui.WHITE, ui.BLACK)
+
+    yield loop.Wait([])