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Add lint for S/MIME subject directory attributes extension (7.1.2.3j) #798

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merged 2 commits into from
Feb 19, 2024

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@bitlux bitlux commented Feb 16, 2024

I tried but failed to create a negative test case for this. The x509.Certificate type does not have subject directory attributes, and as far as I can tell, OpenSSL does not support writing them from the command line.

InputFilename: "smime/mailboxValidatedStrictWithCommonName.pem",
ExpectedResult: lint.Pass,
},
// A negative test case is hard to construct because neither the x509 package

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This does indeed happen and there a handful of such cases throughout this code base where producing a negative example is (thankfully?) quite difficult without facing the daunting task of constructing these certificates nearly by hand.

Fortunately, the test corpus helps save us from ourselves by grapping hundreds-of-thousands of certificates from the wild to see if there are any examples that we could not catch ourselves.

None of the test corpus failed, which there are nearly 200k SMIME certs. So I guess it suppose the generating libraries just generally do a good job on this one.

@christopher-henderson christopher-henderson merged commit a4b46ef into zmap:master Feb 19, 2024
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2 participants