Expose various APIs necessary for certificate selection logic #240
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This is useful for comparing raw u16s with the various sigalg constants.
rushilmehra
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| @@ -2264,11 +2268,29 @@ impl ClientHello<'_> { | |||
| pub fn random(&self) -> &[u8] { | |||
| unsafe { slice::from_raw_parts(self.0.random, self.0.random_len) } | |||
| } | |||
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| /// Returns the raw list of ciphers supported by the client in its Client Hello record. | |||
| pub fn ciphers(&self) -> &[u8] { | |||
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This just returns the raw bytes, but really ciphers are u16, so it would be more helpful if it just returned a slice of u16 instead, but I'm not entirely sure how to do that without re-allocating the whole thing though 😆 ... there's probably some kind of unsavoury trick to do it in Rust...
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So unfortunately casting the raw *const u8 to a *const u16 doesn't work, because of pointer alignment issues. It's problematic because the underlying *const u8 comes form the middle of another buffer, specifically the one that holds the incoming Client Hello message body. I think we'll have to copy these bytes into another u16 buffer - do we want to do that? Or do we want to pass the u8 slice to the user and let them parse it themselves?
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The client sent ciphers in the ClientHello are unparsed and thus require the user to convert u16s into SslCipher instances. It could be worth doing this parsing in the library itself to make things consistent and always return a StackRef<SslCipher>.
The macos-13 runner uses intel chips and thus x86, so clang 12.0.0 is easily available.
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