1 files changed, 21 insertions, 0 deletions
diff --git a/common/src/leap/soledad/common/crypto.py b/common/src/leap/soledad/common/crypto.py
index 2c6bd7a3..56bb608a 100644
--- a/common/src/leap/soledad/common/crypto.py
+++ b/common/src/leap/soledad/common/crypto.py
@@ -35,6 +35,13 @@ class EncryptionSchemes(object):
     PUBKEY = 'pubkey'
 
 
+class UnknownEncryptionScheme(Exception):
+    """
+    Raised when trying to decrypt from unknown encryption schemes.
+    """
+    pass
+
+
 class MacMethods(object):
     """
     Representation of MAC methods used to authenticate document's contents.
@@ -43,6 +50,20 @@ class MacMethods(object):
     HMAC = 'hmac'
 
 
+class UnknownMacMethod(Exception):
+    """
+    Raised when trying to authenticate document's content with unknown MAC
+    mehtod.
+    """
+    pass
+
+
+class WrongMac(Exception):
+    """
+    Raised when failing to authenticate document's contents based on MAC.
+    """
+
+
 #
 # Crypto utilities for a SoledadDocument.
 #