-DES_LONG des_quad_cksum(input, output, length, out_count, seed)
-const unsigned char *input;
-des_cblocks output;
-long length;
-int out_count;
-des_cblock seed;
+DES_LONG des_quad_cksum(const unsigned char *input, des_cblocks output,
+ long length, int out_count, des_cblock seed)