Function selectCipherSuite

cipher_suites.go:175–189

selectCipherSuite returns the first TLS 1.0–1.2 cipher suite from ids which is also in supportedIDs and passes the ok filter.

(ids, supportedIDs []uint16, ok func(*cipherSuite) bool)

// selectCipherSuite returns the first TLS 1.0–1.2 cipher suite from ids which
// is also in supportedIDs and passes the ok filter.
func selectCipherSuite(ids, supportedIDs []uint16, ok func(*cipherSuite) bool) *cipherSuite {
	for _, id := range ids {
		candidate := cipherSuiteByID(id)
		if candidate == nil || !ok(candidate) {
			continue
		}

		for _, suppID := range supportedIDs {
			if id == suppID {
				return candidate
			}
		}
	}
	return nil
}

// A cipherSuiteTLS13 defines only the pair of the AEAD algorithm and hash
// algorithm to be used with HKDF. See RFC 8446, Appendix B.4.