summary refs log tree commit diff
path: root/synapse/util/threepids.py
diff options
context:
space:
mode:
authorDirk Klimpel <5740567+dklimpel@users.noreply.github.com>2020-07-03 15:03:13 +0200
committerGitHub <noreply@github.com>2020-07-03 14:03:13 +0100
commit21a212f8e50343e9b55944fa75ece7911fd2cb70 (patch)
tree01fa808e274bea9593cff5784a577f8e0f313430 /synapse/util/threepids.py
parentAllow YAML config file to contain None (#7779) (diff)
downloadsynapse-21a212f8e50343e9b55944fa75ece7911fd2cb70.tar.xz
Fix inconsistent handling of upper and lower cases of email addresses. (#7021)
fixes #7016
Diffstat (limited to 'synapse/util/threepids.py')
-rw-r--r--synapse/util/threepids.py23
1 files changed, 23 insertions, 0 deletions
diff --git a/synapse/util/threepids.py b/synapse/util/threepids.py
index 3ec1dfb0c2..43c2e0ac23 100644
--- a/synapse/util/threepids.py
+++ b/synapse/util/threepids.py
@@ -48,3 +48,26 @@ def check_3pid_allowed(hs, medium, address):
         return True
 
     return False
+
+
+def canonicalise_email(address: str) -> str:
+    """'Canonicalise' email address
+    Case folding of local part of email address and lowercase domain part
+    See MSC2265, https://github.com/matrix-org/matrix-doc/pull/2265
+
+    Args:
+        address: email address to be canonicalised
+    Returns:
+        The canonical form of the email address
+    Raises:
+        ValueError if the address could not be parsed.
+    """
+
+    address = address.strip()
+
+    parts = address.split("@")
+    if len(parts) != 2:
+        logger.debug("Couldn't parse email address %s", address)
+        raise ValueError("Unable to parse email address")
+
+    return parts[0].casefold() + "@" + parts[1].lower()