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fix: raw JWKS --secret for ES256/ES384 alg #310

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merged 1 commit into from
Apr 15, 2024

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vdbulcke
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Summary

Fix passing raw JWKS as --secret (e.g. --secret "$(curl https://auth.domain.com/jwks.json)") for ES256/ES384 alg.

Relates to #299.

Preflight checklist

  • Code formatted rustfmt ($ cargo fmt)
  • Code linter check with clippy ($ cargo clippy)
  • Relevant tests added
  • Any new documentation added

Comment on lines +818 to +819
let jwks = r#"{"keys":[{"use":"sig","kty":"EC","kid":"4h7wt2IHHu_RLR6OtlZjCe_mIt8xAReS0cDEwwWAeKU","crv":"P-256","x":"w7JAoU_gJbZJvV-zCOvU9yFJq0FNC_edCMRM78P8eQQ","y":"wQg1EytcsEmGrM70Gb53oluoDbVhCZ3Uq3hHMslHVb4"},{"use":"enc","kty":"EC","kid":"4h7wt2IHHu_RLR6OtlZjCe_mIt8xAReS0cDEwwWAeKU","crv":"P-256","x":"w7JAoU_gJbZJvV-zCOvU9yFJq0FNC_edCMRM78P8eQQ","y":"wQg1EytcsEmGrM70Gb53oluoDbVhCZ3Uq3hHMslHVb4"}]}
"#;
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Shouldn't this use the @ file notation rather than a raw string, similar to the encode step above?

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The idea is that since typically the JWKS is hosted on a remote server, that needs to be download over https, this allows to validate a JWT signature as a one-liner:

for example:

jwt decode $JWT_TOKEN --secret "$( curl -s https://www.googleapis.com/oauth2/v3/certs)"  --alg RS256

Instead of

## first download JWKS as JSON file
curl -s https://www.googleapis.com/oauth2/v3/certs -o /tmp/jwks.json
## then validate the JWT signature
jwt decode $JWT_TOKEN --secret @/tmp/jwks.json  --alg RS256

Also there is another test that uses the @./tests/pub_ecdsa_jwks.json file notation here https://github.com/mike-engel/jwt-cli/blob/main/tests/main_test.rs#L782.

@mike-engel mike-engel merged commit 8aec4c1 into mike-engel:main Apr 15, 2024
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2 participants