Add load_ssb_secret() to utils

ssb/tests/test_util.py

@@ -0,0 +1,36 @@
+from base64 import b64decode
+from unittest.mock import mock_open, patch
+
+import pytest
+
+from ssb.util import load_ssb_secret, ConfigException
+
+
+CONFIG_FILE = """
+## Comments should be supported too
+{
+    "curve": "ed25519",
+    "public": "rsYpBIcXsxjQAf0JNes+MHqT2DL+EfopWKAp4rGeEPQ=ed25519",
+    "private": "/bqDBI/vGLD5qy3GxMsgHFgYIrrY08JfTzUaCYT6x0GuxikEhxezGNAB/Qk16z4wepPYMv4R+ilYoCnisZ4Q9A==",
+    "id": "@rsYpBIcXsxjQAf0JNes+MHqT2DL+EfopWKAp4rGeEPQ=.ed25519"
+}
+"""
+
+CONFIG_FILE_INVALID = CONFIG_FILE.replace('ed25519', 'foo')
+
+
+def test_load_secret():
+    with patch('ssb.util.open', mock_open(read_data=CONFIG_FILE), create=True):
+        secret = load_ssb_secret()
+
+    priv_key = b'\xfd\xba\x83\x04\x8f\xef\x18\xb0\xf9\xab-\xc6\xc4\xcb \x1cX\x18"\xba\xd8\xd3\xc2_O5\x1a\t\x84\xfa\xc7A'
+
+    assert secret['id'] == '@rsYpBIcXsxjQAf0JNes+MHqT2DL+EfopWKAp4rGeEPQ=.ed25519'
+    assert bytes(secret['keypair']) == priv_key
+    assert bytes(secret['keypair'].verify_key) == b64decode('rsYpBIcXsxjQAf0JNes+MHqT2DL+EfopWKAp4rGeEPQ=')
+
+
+def test_load_exception():
+    with pytest.raises(ConfigException):
+        with patch('ssb.util.open', mock_open(read_data=CONFIG_FILE_INVALID), create=True):
+            load_ssb_secret()