Replace x509-certificate with x509-cert

[aumetra]

Closes #20

[serprex]

Suggested change

	let digest = match cert.signature.oid {
	// Note: SHA1 is upgraded to SHA256 as per https://datatracker.ietf.org/doc/html/rfc5929#section-4.1
	ID_SHA_1
	| ID_SHA_256
	| SHA_1_WITH_RSA_ENCRYPTION
	| SHA_256_WITH_RSA_ENCRYPTION
	| ECDSA_WITH_SHA_256 => &digest::SHA256,
	ID_SHA_384 | SHA_384_WITH_RSA_ENCRYPTION | ECDSA_WITH_SHA_384 => {
	&digest::SHA384
	}
	ID_SHA_512 | SHA_512_WITH_RSA_ENCRYPTION | ID_ED_25519 => &digest::SHA512,
	_ => return None,
	};
	Some(digest)
	match cert.signature.oid {
	// Note: SHA1 is upgraded to SHA256 as per https://datatracker.ietf.org/doc/html/rfc5929#section-4.1
	ID_SHA_1
	| ID_SHA_256
	| SHA_1_WITH_RSA_ENCRYPTION
	| SHA_256_WITH_RSA_ENCRYPTION
	| ECDSA_WITH_SHA_256 => &digest::SHA256,
	ID_SHA_384 | SHA_384_WITH_RSA_ENCRYPTION | ECDSA_WITH_SHA_384 => {
	Some(&digest::SHA384)
	}
	ID_SHA_512 | SHA_512_WITH_RSA_ENCRYPTION | ID_ED_25519 => Some(&digest::SHA512),
	_ => None,
	}