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tsandall/gist:c7b57b5f96b77765ef416fba6f8e9f3e

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Example of verifying JWTs signed with RS256 in OPA
Raw
gistfile1.txt
package example
cert = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`
good_token = `eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJuYmYiOjE0NDQ0Nzg0MDB9.N0-EVdv5pvUfZYFRzMGnsWpNLHgwMEgViPwpuLBEtt32682OgnOK-N4X-2gpQEjQIbUr0IFym8YsRQU9GZvqQP72Sd6yOQNGSNeE74DpUZCAjBa9SBIb1UlD2MxZB-e7YJiEyo7pZhimaqorXrgorlaXYGMvsCFWDYmBLzGaGYaGJyEpkZHzHb7ujsDrJJjdEtDV3kh13gTHzLPvqnoXuuxelXye_8LPIhvgDy52gT4shUEso71pJCMv_IqAR19ljVE17lJzoi6VhRn6ReNUE-yg4KfCO4Ypnuu-mcQr7XtmSYoWkX72L5UQ-EyWkoz-w0SYKoJTPzHkTL2thYStksVpeNkGuck25aUdtrQgmPbao0QOWBFlkg03e6mPCD2-aXOt1ofth9mZGjxWMHX-mUqHaNmaWM3WhRztJ73hWrmB1YOdYQtOEHejfvR_td5tqIw4W6ufRy2ScOypGQe7kNaUZxpgxZ1927ZGNiQgawIOAQwXOcFx1JNSEIeg55-cYJrHPxsXGOB9ZxW-qnswmFJp474iUVXjzGhLexJDXBwvKGs_O3JFjMsvyV9_hm7bnQU0vG_HgPYs5i9VOHRMujq1vFBcm52TFVOBGdWaGfb9RRdLLYvVkJLk0Poh19rsCWb7-Vc3mAaGGpvuk4Wv-PnGGNC-V-FQqIbijHDrn_g`
bad_token = `eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJuYmYiOjE0NDQ0Nzg0MDB9.Yt89BjaPCNgol478rYyH66-XgkHos02TsVwxLH3ZlvOoIVjbhYW8q1_MHehct1-yBf1UOX3g-lUrIjpoDtX1TfAESuaWTjYPixRvjfJ-Nn75JF8QuAl5PD27C6aJ4PjUPNfj0kwYBnNQ_oX-ZFb781xRi7qRDB6swE4eBUxzHqKUJBLaMM2r8k1-9iE3ERNeqTJUhV__p0aSyRj-i62rdZ4TC5nhxtWodiGP4e4GrYlXkdaKduK63cfdJF-kfZfTsoDs_xy84pZOkzlflxuNv9bNqd-3ISAdWe4gsEvWWJ8v70-QWkydnH8rhj95DaqoXrjfzbOgDpKtdxJC4daVPKvntykzrxKhZ9UtWzm3OvJSKeyWujFZlldiTfBLqNDgdi-Boj_VxO5Pdh-67lC3L-pBMm4BgUqf6rakBQvoH7AV6zD5CbFixh7DuqJ4eJHHItWzJwDctMrV3asm-uOE1E2B7GErGo3iX6S9Iun_kvRUp6kyvOaDq5VvXzQOKyLQIQyHGGs0aIV5cFI2IuO5Rt0uUj5mzPQrQWHgI4r6Mc5bzmq2QLxBQE8OJ1RFhRpsuoWQyDM8aRiMQIJe1g3x4dnxbJK4dYheYblKHFepScYqT1hllDp3oUNn89sIjQIhJTe8KFATu4K8ppluys7vhpE2a_tq8i5O0MFxWmsxN4Q`
test_good_token {
io.jwt.verify_rs256(good_token, cert)
}
test_bad_token {
not io.jwt.verify_rs256(bad_token, cert)
}
test_verify_and_decode {
io.jwt.verify_rs256(good_token, cert)
io.jwt.decode(good_token, [header,payload,sig])
payload.foo == "bar"
}
@tsandall

tsandall commented Jul 18, 2018 •
edited
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If you evaluate the 2nd expression in the last rule you will see the values for the header, payload, and sig:

[
  {
    "header": {
      "alg": "RS256",
      "typ": "JWT"
    },
    "payload": {
      "foo": "bar",
      "nbf": 1444478400
    },
    "sig": "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"
  }
]

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