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Add client_secret_path as alternative for client_secret for OIDC config (#16030)

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Maximilian Bosch 2023-08-21 21:32:17 +02:00 committed by GitHub
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commit d6ae4041a4
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3 changed files with 24 additions and 1 deletions
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1
changelog.d/16030.feature Normal file
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@ -0,0 +1 @@
Allow specifying `client_secret_path` as alternative to `client_secret` for OIDC providers. This avoids leaking the client secret in the homeserver config. Contributed by @Ma27.

8
docs/usage/configuration/config_documentation.md
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@ -3204,6 +3204,14 @@ Options for each entry include:
* `client_secret`: oauth2 client secret to use. May be omitted if
`client_secret_jwt_key` is given, or if `client_auth_method` is 'none'.
Must be omitted if `client_secret_path` is specified.
* `client_secret_path`: path to the oauth2 client secret to use. With that
it's not necessary to leak secrets into the config file itself.
Mutually exclusive with `client_secret`. Can be omitted if
`client_secret_jwt_key` is specified.
*Added in Synapse 1.91.0.*
* `client_secret_jwt_key`: Alternative to client_secret: details of a key used
to create a JSON Web Token to be used as an OAuth2 client secret. If

16
synapse/config/oidc.py
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@ -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"),