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//! Directory Authority Key Certificates
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use super::*;

            

        

            

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/// SHA1 hash as used in directory authority certificates

            

        

            

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//

            

        

            

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// We don't have a better name for this!

            

        

            

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type DirKeyCertificateHash = [u8; 20];

            

        

            

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pub use crate::doc::authcert::AuthCert as DirAuthKeyCert;

            

        

            

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pub use crate::doc::authcert::AuthCertSigned as DirAuthKeyCertSigned;

            

        

            

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impl DirAuthKeyCertSigned {

            

        

            

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    /// Verify the signatures (and check validity times)

            

        

            

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    ///

            

        

            

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    /// # Security considerations

            

        

            

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    ///

            

        

            

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    /// The caller must check that the KP_auth_id is correct/relevant.

            

        

            

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    pub fn verify_selfcert(self, now: SystemTime) -> Result<DirAuthKeyCert, VF> {

            

        

            

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        // verify main document signature (and timestamp)

            

        

            

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        let hash = self.signatures.dir_key_certification.hash;

            

        

            

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        let body = &self.inspect_unverified().0;

            

        

            

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        let validity = body.dir_key_published.0..=body.dir_key_expires.0;

            

        

            

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        check_validity_time(now, validity)?;

            

        

            

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        body.dir_identity_key

            

        

            

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            .verify(&hash, &self.signatures.dir_key_certification.signature)?;

            

        

            

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        // double-check the id hash

            

        

            

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        if *body.fingerprint != body.dir_identity_key.to_rsa_identity() {

            

        

            

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            return Err(VF::Inconsistent);

            

        

            

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        }

            

        

            

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        // verify cross-cert

            

        

            

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        let h_kp_auth_id_rsa: DirKeyCertificateHash =

            

        

            

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            tor_llcrypto::d::Sha1::digest(body.dir_identity_key.to_der()).into();

            

        

            

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        // Cross-cert has no timestamp.  Whatever.

            

        

            

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        body.dir_signing_key

            

        

            

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            .verify(&h_kp_auth_id_rsa, &body.dir_key_crosscert.signature)?;

            

        

            

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        Ok(self.unwrap_unverified().0)

            

        

            

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    }

            

        

            

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}