This class implements an ASN.1 encoded Rainbow public key. The ASN.1 definition of this structure is:

      RainbowPublicKey ::= SEQUENCE {
        CHOICE
        {
        oid        OBJECT IDENTIFIER         -- OID identifying the algorithm
        version    INTEGER                    -- 0
        }
        docLength        Integer               -- length of the code
        coeffquadratic   SEQUENCE OF OCTET STRING -- quadratic (mixed) coefficients
        coeffsingular    SEQUENCE OF OCTET STRING -- singular coefficients
        coeffscalar    SEQUENCE OF OCTET STRING -- scalar coefficients
      }