returns a messagedigest instance for sha-1 digests ; notethat the instance returned is thread local and must not be shared amongst threads . concode_field_sep char[] HEX_DIGITS concode_elem_sep ThreadLocal<MessageDigest> SHA_256_DIGEST concode_elem_sep ThreadLocal<MessageDigest> SHA_1_DIGEST concode_elem_sep ThreadLocal<MessageDigest> MD5_DIGEST concode_field_sep MessageDigest sha256 concode_elem_sep String toHexString concode_elem_sep MessageDigest get concode_elem_sep ThreadLocal<MessageDigest> createThreadLocalMessageDigest concode_elem_sep MessageDigest md5
MessageDigest function ( ) { return get ( SHA_1_DIGEST ) ; }