question: public void beginClearText ( int hashAlgorithm ) throws IOException { String hash ; switch ( hashAlgorithm ) { case HashAlgorithmTags . SHA1 : hash = "SHA1" ; break ; case HashAlgorithmTags . SHA256 : hash = "SHA256" ; break ; case HashAlgorithmTags . SHA384 : hash = "SHA384" ; break ; case HashAlgorithmTags . SHA512 : hash = "SHA512" ; break ; case HashAlgorithmTags . MD2 : hash = "MD2" ; break ; case HashAlgorithmTags . MD5 : hash = "MD5" ; break ; case HashAlgorithmTags . RIPEMD160 : hash = "RIPEMD160" ; break ; default : throw new IOException ( "unknown hash algorithm tag in beginClearText: " + hashAlgorithm ) ; } String armorHdr = "-----BEGIN PGP SIGNED MESSAGE-----" + nl ; String hdrs = "Hash: " + hash + nl + nl ; for ( int i = 0 ; i != armorHdr . length ( ) ; i ++ ) { out . write ( armorHdr . charAt ( i ) ) ; } for ( int i = 0 ; i != hdrs . length ( ) ; i ++ ) { out . write ( hdrs . charAt ( i ) ) ; } clearText = true ; newLine = true ; lastb = 0 ; }
target:  Start a clear text signed message.