anchor.diff:  	      aes_cfb, aes_cbc, des_cbc_iter, rand_uniform_test, strong_rand_test,
   	      rsa_verify_test, exor_test, rc4_test, rc4_stream_test, mod_exp_test,
                 hmac_update_md5, hmac_update_sha, hmac_update_sha256, hmac_update_sha512,
  -	      hmac_rfc4231,
  +	      hmac_rfc2202, hmac_rfc4231,
   	      aes_ctr_stream },
   
       F = element(random:uniform(size(Funcs)),Funcs),
  
positive.code:          hmac_update_md5/1,
           hmac_update_md5_io/1,
           hmac_update_md5_n/1,
  	 hmac_rfc4231/1,
  	 sha256/1,
  	 sha256_update/1,
  
negative.code:        sha256, sha256_update, sha512, sha512_update,
         hmac_update_sha, hmac_update_sha_n, hmac_update_sha256, hmac_update_sha512,
         hmac_update_md5_n, hmac_update_md5_io, hmac_update_md5,
         hmac_rfc2202, hmac_rfc4231,
         des_cbc, aes_cfb, aes_cbc,
         des_cfb, des_cfb_iter, des3_cbc, des3_cfb, rc2_cbc,
         aes_cbc_iter, aes_ctr, aes_ctr_stream, des_cbc_iter, des_ecb,
  