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-rw-r--r--synapse/config/oidc.py16
1 files changed, 15 insertions, 1 deletions
diff --git a/synapse/config/oidc.py b/synapse/config/oidc.py
index 77c1d1dc8e..574d6afb95 100644
--- a/synapse/config/oidc.py
+++ b/synapse/config/oidc.py
@@ -280,6 +280,20 @@ def _parse_oidc_config_dict(
         for x in oidc_config.get("attribute_requirements", [])
     ]
 
+    # Read from either `client_secret_path` or `client_secret`. If both exist, error.
+    client_secret = oidc_config.get("client_secret")
+    client_secret_path = oidc_config.get("client_secret_path")
+    if client_secret_path is not None:
+        if client_secret is None:
+            client_secret = read_file(
+                client_secret_path, config_path + ("client_secret_path",)
+            ).rstrip("\n")
+        else:
+            raise ConfigError(
+                "Cannot specify both client_secret and client_secret_path",
+                config_path + ("client_secret",),
+            )
+
     return OidcProviderConfig(
         idp_id=idp_id,
         idp_name=oidc_config.get("idp_name", "OIDC"),
@@ -288,7 +302,7 @@ def _parse_oidc_config_dict(
         discover=oidc_config.get("discover", True),
         issuer=oidc_config["issuer"],
         client_id=oidc_config["client_id"],
-        client_secret=oidc_config.get("client_secret"),
+        client_secret=client_secret,
         client_secret_jwt_key=client_secret_jwt_key,
         client_auth_method=oidc_config.get("client_auth_method", "client_secret_basic"),
         pkce_method=oidc_config.get("pkce_method", "auto"),