//      iPAddress                       [7]     OCTET STRING,
	// }
	oidTagMap = map[IdentityType]int{
		TypeDNS: 2,
		TypeURI: 6,
		TypeIP:  7,
	}

	// A reversed map that maps from an OID tag to the corresponding identity
	// type.
	identityTypeMap = generateReversedMap(oidTagMap)

	// The OID for the SAN extension (See
	// http://www.alvestrand.no/objectid/2.5.29.17.html).