☰

OpenVPN TLS 1.2 密碼套件

tag-icon • tag-icon vpn openvpn tls
OpenVPN TLS 1.2 密碼套件

這是我原來的問題的轉發（OpenVPN 無法與任何 TLS 1.2 密碼建立連接）因為找到了 128 位元密碼套件的解決方案，所以問題被分成兩個部分。

OpenVPN 無法與這些密碼套件連線：

TLS-DHE-RSA-WITH-AES-256-GCM-SHA384
TLS-DHE-RSA-WITH-AES-256-CBC-SHA256

我想知道其他人是否成功使用這些。

我運行當前版本2.3.6，從原始碼編譯。

嘗試過各種 Linux 發行版和 Windows 用戶端。

根據 wiki，密碼應該可以運作： https://community.openvpn.net/openvpn/wiki/Hardening#Useof--tls-cipher

客戶端錯誤：

[... Desktop]$ sudo openvpn home.ovpn 
Sat Jan 24 15:18:28 2015 OpenVPN 2.3.6 x86_64-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [MH] [IPv6] built on Jan 24 2015
Sat Jan 24 15:18:28 2015 library versions: OpenSSL 1.0.1l 15 Jan 2015, LZO 2.08
Sat Jan 24 15:18:28 2015 WARNING: file 'home/client1.key' is group or others accessible
Sat Jan 24 15:18:28 2015 WARNING: file 'home/ta.key' is group or others accessible
Sat Jan 24 15:18:28 2015 Control Channel Authentication: using 'home/ta.key' as a OpenVPN static key file
Sat Jan 24 15:18:28 2015 Outgoing Control Channel Authentication: Using 256 bit message hash 'SHA256' for HMAC authentication
Sat Jan 24 15:18:28 2015 Incoming Control Channel Authentication: Using 256 bit message hash 'SHA256' for HMAC authentication
Sat Jan 24 15:18:28 2015 Attempting to establish TCP connection with [AF_INET]192.168.1.67:1194 [nonblock]
Sat Jan 24 15:18:29 2015 TCP connection established with [AF_INET]192.168.1.67:1194
Sat Jan 24 15:18:29 2015 TCPv4_CLIENT link local: [undef]
Sat Jan 24 15:18:29 2015 TCPv4_CLIENT link remote: [AF_INET]192.168.1.67:1194
Sat Jan 24 15:18:29 2015 TLS_ERROR: BIO read tls_read_plaintext error: error:140830B5:SSL routines:SSL3_CLIENT_HELLO:no ciphers available
Sat Jan 24 15:18:29 2015 TLS Error: TLS object -> incoming plaintext read error
Sat Jan 24 15:18:29 2015 TLS Error: TLS handshake failed
Sat Jan 24 15:18:29 2015 Fatal TLS error (check_tls_errors_co), restarting
Sat Jan 24 15:18:29 2015 SIGUSR1[soft,tls-error] received, process restarting
Sat Jan 24 15:18:30 2015 SIGINT[hard,init_instance] received, process exiting

答案1

是的，這應該有效，並且對我有效：

$ openvpn --config loopback-client --tls-cipher TLS-DHE-RSA-WITH-AES-256-GCM-SHA384 --tls-version-min 1.0
Thu Jan 29 00:13:13 2015 OpenVPN 2.3.6 x86_64-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [PKCS11] [MH] [IPv6] built on Dec 16 2014
Thu Jan 29 00:13:13 2015 library versions: OpenSSL 1.0.1f 6 Jan 2014, LZO 2.06
[...]
Thu Jan 29 00:13:13 2015 Control Channel: TLSv1.2, cipher TLSv1/SSLv3 DHE-RSA-AES256-GCM-SHA384, 2048 bit RSA
Thu Jan 29 00:13:13 2015 [Test-Server] Peer Connection Initiated with [AF_INET]127.0.0.1:16000
Thu Jan 29 00:13:14 2015 Initialization Sequence Completed

這是使用 openvpn 提供的預設環回伺服器和環回客戶端設定檔。確保將tls-version-min 1.0（或 1.2，如果您想強制執行）新增至兩端的設定。除此之外，我並沒有做什麼特別的事。

具體是 AES-256 的問題嗎？即，使用 TLS-DHE-RSA-WITH-AES-128-CBC-SHA 與 TLS-DHE-RSA-WITH-AES-256-CBC-SHA 是否會獲得相同的行為？

相關內容