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openwallet-foundation-labs / sd-jwt-python

A Python implementation of the Selective Disclosure JWT (SD-JWT) spec.
Apache License 2.0
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Issuers and holders with RSA key pairs doesn't seems to work #20

Open aivokalu opened 2 months ago

aivokalu commented 2 months ago

It seems that issuers and/or holders with RSA key pairs doesn't work. Processing fails with the following traceback: 

Traceback (most recent call last):
  File "/sd-jwt-python/venv/bin/sd-jwt-generate", line 8, in <module>
    sys.exit(run())
             ^^^^^
  File "/sd-jwt-python/venv/lib/python3.12/site-packages/sd_jwt/bin/generate.py", line 275, in run
    generate_test_case_data(settings, case_path, args.type)
  File "/sd-jwt-python/venv/lib/python3.12/site-packages/sd_jwt/bin/generate.py", line 56, in generate_test_case_data
    sdjwt_at_issuer = SDJWTIssuer(
                      ^^^^^^^^^^^^
  File "/sd-jwt-python/venv/lib/python3.12/site-packages/sd_jwt/issuer.py", line 55, in __init__
    self._create_signed_jws()
  File "/sd-jwt-python/venv/lib/python3.12/site-packages/sd_jwt/issuer.py", line 178, in _create_signed_jws
    self.sd_jwt.add_signature(
  File "/sd-jwt-python/venv/lib/python3.12/site-packages/jwcrypto/jws.py", line 545, in add_signature
    sig = c.sign()
          ^^^^^^^^
  File "/sd-jwt-python/venv/lib/python3.12/site-packages/jwcrypto/jws.py", line 152, in sign
    signature = self.engine.sign(self.key, sigin)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/sd-jwt-python/venv/lib/python3.12/site-packages/jwcrypto/jwa.py", line 152, in sign
    signature = skey.sign(payload, ec.ECDSA(self.hashfn))
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: RSAPrivateKey.sign() missing 1 required positional argument: 'algorithm'

jwa.py:152 is inside the the "_RawEC" constructor, so ... somehow, the wrong default key type is being used.

The issue could be reproduced with following section in settings.yml (RSA example key copied from https://connect2id.com/products/nimbus-jose-jwt/examples/jwk-generation#rsa)

key_settings:

    key_size: 2048

    kty: RSA

    issuer_key:
        kty: RSA
        n: pjdss8ZaDfEH6K6U7GeW2nxDqR4IP049fk1fK0lndimbMMVBdPv_hSpm8T8EtBDxrUdi1OHZfMhUixGaut-3nQ4GG9nM249oxhCtxqqNvEXrmQRGqczyLxuh-fKn9Fg--hS9UpazHpfVAFnB5aCfXoNhPuI8oByyFKMKaOVgHNqP5NBEqabiLftZD3W_lsFCPGuzr4Vp0YS7zS2hDYScC2oOMu4rGU1LcMZf39p3153Cq7bS2Xh6Y-vw5pwzFYZdjQxDn8x8BG3fJ6j8TGLXQsbKH1218_HcUJRvMwdpbUQG5nvA2GXVqLqdwp054Lzk9_B_f1lVrmOKuHjTNHq48w
        e: AQAB
        d: ksDmucdMJXkFGZxiomNHnroOZxe8AmDLDGO1vhs-POa5PZM7mtUPonxwjVmthmpbZzla-kg55OFfO7YcXhg-Hm2OWTKwm73_rLh3JavaHjvBqsVKuorX3V3RYkSro6HyYIzFJ1Ek7sLxbjDRcDOj4ievSX0oN9l-JZhaDYlPlci5uJsoqro_YrE0PRRWVhtGynd-_aWgQv1YzkfZuMD-hJtDi1Im2humOWxA4eZrFs9eG-whXcOvaSwO4sSGbS99ecQZHM2TcdXeAs1PvjVgQ_dKnZlGN3lTWoWfQP55Z7Tgt8Nf1q4ZAKd-NlMe-7iqCFfsnFwXjSiaOa2CRGZn-Q
        p: 4A5nU4ahEww7B65yuzmGeCUUi8ikWzv1C81pSyUKvKzu8CX41hp9J6oRaLGesKImYiuVQK47FhZ--wwfpRwHvSxtNU9qXb8ewo-BvadyO1eVrIk4tNV543QlSe7pQAoJGkxCia5rfznAE3InKF4JvIlchyqs0RQ8wx7lULqwnn0
        q: ven83GM6SfrmO-TBHbjTk6JhP_3CMsIvmSdo4KrbQNvp4vHO3w1_0zJ3URkmkYGhz2tgPlfd7v1l2I6QkIh4Bumdj6FyFZEBpxjE4MpfdNVcNINvVj87cLyTRmIcaGxmfylY7QErP8GFA-k4UoH_eQmGKGK44TRzYj5hZYGWIC8
        dp: lmmU_AG5SGxBhJqb8wxfNXDPJjf__i92BgJT2Vp4pskBbr5PGoyV0HbfUQVMnw977RONEurkR6O6gxZUeCclGt4kQlGZ-m0_XSWx13v9t9DIbheAtgVJ2mQyVDvK4m7aRYlEceFh0PsX8vYDS5o1txgPwb3oXkPTtrmbAGMUBpE
        dq: mxRTU3QDyR2EnCv0Nl0TCF90oliJGAHR9HJmBe__EjuCBbwHfcT8OG3hWOv8vpzokQPRl5cQt3NckzX3fs6xlJN4Ai2Hh2zduKFVQ2p-AF2p6Yfahscjtq-GY9cB85NxLy2IXCC0PF--Sq9LOrTE9QV988SJy_yUrAjcZ5MmECk
        qi: ldHXIrEmMZVaNwGzDF9WG8sHj2mOZmQpw9yrjLK9hAsmsNr5LTyqWAqJIYZSwPTYWhY4nu2O0EY9G9uYiqewXfCKw_UngrJt8Xwfq1Zruz0YY869zPN4GiE9-9rzdZB33RBw8kIOquY3MK74FMwCihYx_LiU2YTHkaoJ3ncvtvg

    holder_key:
        kty: RSA
        n: pjdss8ZaDfEH6K6U7GeW2nxDqR4IP049fk1fK0lndimbMMVBdPv_hSpm8T8EtBDxrUdi1OHZfMhUixGaut-3nQ4GG9nM249oxhCtxqqNvEXrmQRGqczyLxuh-fKn9Fg--hS9UpazHpfVAFnB5aCfXoNhPuI8oByyFKMKaOVgHNqP5NBEqabiLftZD3W_lsFCPGuzr4Vp0YS7zS2hDYScC2oOMu4rGU1LcMZf39p3153Cq7bS2Xh6Y-vw5pwzFYZdjQxDn8x8BG3fJ6j8TGLXQsbKH1218_HcUJRvMwdpbUQG5nvA2GXVqLqdwp054Lzk9_B_f1lVrmOKuHjTNHq48w
        e: AQAB
        d: ksDmucdMJXkFGZxiomNHnroOZxe8AmDLDGO1vhs-POa5PZM7mtUPonxwjVmthmpbZzla-kg55OFfO7YcXhg-Hm2OWTKwm73_rLh3JavaHjvBqsVKuorX3V3RYkSro6HyYIzFJ1Ek7sLxbjDRcDOj4ievSX0oN9l-JZhaDYlPlci5uJsoqro_YrE0PRRWVhtGynd-_aWgQv1YzkfZuMD-hJtDi1Im2humOWxA4eZrFs9eG-whXcOvaSwO4sSGbS99ecQZHM2TcdXeAs1PvjVgQ_dKnZlGN3lTWoWfQP55Z7Tgt8Nf1q4ZAKd-NlMe-7iqCFfsnFwXjSiaOa2CRGZn-Q
        p: 4A5nU4ahEww7B65yuzmGeCUUi8ikWzv1C81pSyUKvKzu8CX41hp9J6oRaLGesKImYiuVQK47FhZ--wwfpRwHvSxtNU9qXb8ewo-BvadyO1eVrIk4tNV543QlSe7pQAoJGkxCia5rfznAE3InKF4JvIlchyqs0RQ8wx7lULqwnn0
        q: ven83GM6SfrmO-TBHbjTk6JhP_3CMsIvmSdo4KrbQNvp4vHO3w1_0zJ3URkmkYGhz2tgPlfd7v1l2I6QkIh4Bumdj6FyFZEBpxjE4MpfdNVcNINvVj87cLyTRmIcaGxmfylY7QErP8GFA-k4UoH_eQmGKGK44TRzYj5hZYGWIC8
        dp: lmmU_AG5SGxBhJqb8wxfNXDPJjf__i92BgJT2Vp4pskBbr5PGoyV0HbfUQVMnw977RONEurkR6O6gxZUeCclGt4kQlGZ-m0_XSWx13v9t9DIbheAtgVJ2mQyVDvK4m7aRYlEceFh0PsX8vYDS5o1txgPwb3oXkPTtrmbAGMUBpE
        dq: mxRTU3QDyR2EnCv0Nl0TCF90oliJGAHR9HJmBe__EjuCBbwHfcT8OG3hWOv8vpzokQPRl5cQt3NckzX3fs6xlJN4Ai2Hh2zduKFVQ2p-AF2p6Yfahscjtq-GY9cB85NxLy2IXCC0PF--Sq9LOrTE9QV988SJy_yUrAjcZ5MmECk
        qi: ldHXIrEmMZVaNwGzDF9WG8sHj2mOZmQpw9yrjLK9hAsmsNr5LTyqWAqJIYZSwPTYWhY4nu2O0EY9G9uYiqewXfCKw_UngrJt8Xwfq1Zruz0YY869zPN4GiE9-9rzdZB33RBw8kIOquY3MK74FMwCihYx_LiU2YTHkaoJ3ncvtvg