fix UDP bug

Hi28 · May 14, 2017 · 701ddc0 · 701ddc0
1 parent 9c17153
commit 701ddc0
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/obfs/auth_chain.c b/src/obfs/auth_chain.c
@@ -476,8 +476,9 @@ int auth_chain_a_client_udp_pre_encrypt(obfs *self, char **pplaindata, int datal
  for (int i = 0; i < 4; ++i) {
  uid[i] = local->uid[i] ^ hash[i];
  }
- memmove(out_buffer + datalength, auth_data, 3);
- memmove(out_buffer + datalength + 3, uid, 4);
+ memmove(out_buffer + datalength, rnd_data, rand_len);
+ memmove(out_buffer + outlength - 8, auth_data, 3);
+ memmove(out_buffer + outlength - 5, uid, 4);
 
  ss_md5_hmac_with_key((char*)hash, out_buffer, outlength - 1, local->user_key, local->user_key_len);
  memmove(out_buffer + outlength - 1, hash, 1);