Ignore unknown kty in KeySet.import_key_set (RFC 7517 §5)#103
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Ignore unknown kty in KeySet.import_key_set (RFC 7517 §5)#103RalphBragg wants to merge 1 commit intoauthlib:mainauthlib/joserfc:mainfrom RalphBragg:fix/jwks-import-ignore-unknown-ktyRalphBragg/joserfc:fix/jwks-import-ignore-unknown-ktyCopy head branch name to clipboard
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import_key_set raised InvalidKeyTypeError on the first key whose kty was not in the registry, failing the whole set. Skip a key whose kty is present but unrecognised, per RFC 7517 Section 5, so classical keys published alongside a post-quantum key (ML-DSA, kty AKP) remain usable.
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Tracking issue: #104. This PR fixes it. |
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What
KeySet.import_key_setnow skips a key whosektyis present but not in the registry, instead of raisingInvalidKeyTypeErrorand failing the whole set.Why
Today
import_key_setimports each key eagerly, so the first key with an unrecognisedktyraises (Invalid key type: '...') and the entire set fails. RFC 7517 §5 says a processor SHOULD ignore key types it does not understand.This is becoming a live issue as post-quantum keys (ML-DSA,
kty:"AKP", RFC 9964) begin appearing in published JWKS next to RSA/EC keys: one unknown key otherwise stops the classical keys next to it from verifying. (Companion to the same fix in authlib, authlib/authlib#914, sinceauthlib.josepoints here as its successor.)Change
import_key_setskips only keys whosektyis explicitly present and not inregistry_cls.key_types; a recognised-but-malformed key still raises, and a set with no usable keys still raisesMissingKeyErroras before.test_import_key_set_ignores_unknown_kty.tests/jwk/test_jwk_set.pypasses (11 passed).