即使密码组合在一起，握手也会失败

Question

在与www.howsmyssl.com/a/check建立安全连接时遇到了一些麻烦。我使用wolfSSL进行连接，但握手总是失败（致命错误警报40）。我试图嗅探网络以查看数据包，看看究竟发送了什么以及支持哪些密码套件，我看到根据ssllabs的测试，howsmyssl.com和我的客户有共同的密码套件。所以我真的不知道错误发生在哪里。 这是客户的痕迹：

这是对www.howsmyssl.com的ssllabs分析的link。在这里你可以看到他们有共同的密码套件（例如0xc02f），所以我认为连接应该成功，或者我错过了什么？

修改 以下是wolfssl的调试日志

[0;32mI (6565) openssl_example: OpenSSL demo thread start OK[0m
[0;33mW (6565) openssl_example: Size of long = 4, Size of longlong = 8
[0m
[0;32mI (6565) openssl_example: get target IP address[0m
[0;32mI (6595) openssl_example: OK[0m
[0;32mI (6595) openssl_example: 104.196.190.195[0m
wolfSSL Entering wolfSSL_Init
wolfSSL Entering wolfCrypt_Init
[0;32mI (6595) openssl_example: create SSL context ......[0m
wolfSSL Entering WOLFSSL_CTX_new_ex
wolfSSL Entering wolfSSL_CertManagerNew
wolfSSL Leaving WOLFSSL_CTX_new, return 0
[0;32mI (6615) openssl_example: OK[0m
wolfSSL Entering wolfSSL_CTX_set_verify
wolfSSL Entering wolfSSL_CTX_load_verify_buffer
Getting into SSL_FILETYPE_PEM if
Processing CA PEM file
wolfSSL Entering PemToDer
Adding a CA
wolfSSL Entering GetExplicitVersion
wolfSSL Entering GetSerialNumber
Got Cert Header
wolfSSL Entering GetAlgoId
wolfSSL Entering GetObjectId()
Got Algo ID
Getting Cert Name
Getting Cert Name
Got Subject Name
wolfSSL Entering GetAlgoId
wolfSSL Entering GetObjectId()
Got Key
Parsed Past Key
wolfSSL Entering DecodeCertExtensions
wolfSSL Entering GetObjectId()
wolfSSL Entering DecodeSubjKeyId
wolfSSL Entering GetObjectId()
wolfSSL Entering DecodeAuthKeyId
wolfSSL Entering GetObjectId()
wolfSSL Entering DecodeBasicCaConstraint
wolfSSL Entering GetAlgoId
wolfSSL Entering GetObjectId()
    Parsed new CA
    Freeing Parsed CA
    Freeing der CA
        OK Freeing der CA
wolfSSL Leaving AddCA, return 0
1
   Processed a CA
wolfSSL Entering PemToDer
Couldn't find PEM header
-372
CA Parse failed, no progress in file.
Do not continue search for other certs in file
Processed at least one valid CA. Other stuff OK
[0;32mI (6715) openssl_example: create socket ......[0m
[0;32mI (6725) openssl_example: OK[0m
[0;32mI (6725) openssl_example: bind socket ......[0m
[0;32mI (6735) openssl_example: OK[0m
[0;32mI (6735) openssl_example: socket connect to remote www.howsmyssl.com ......[0m
[0;32mI (6865) openssl_example: OK[0m
[0;32mI (6865) openssl_example: create SSL ......[0m
wolfSSL Entering SSL_new
wolfSSL Leaving SSL_new, return 0
[0;32mI (6865) openssl_example: OK[0m
wolfSSL Entering SSL_set_fd
wolfSSL Entering SSL_set_read_fd
wolfSSL Leaving SSL_set_read_fd, return 1
wolfSSL Entering SSL_set_write_fd
wolfSSL Leaving SSL_set_write_fd, return 1
[0;32mI (6885) openssl_example: SSL connected to www.howsmyssl.com port 443 ......[0m
wolfSSL Entering SSL_connect()
growing output buffer

Shrinking output buffer

connect state: CLIENT_HELLO_SENT
received record layer msg
got ALERT!
Got alert
wolfSSL error occurred, error = 40
wolfSSL error occurred, error = -313
[0;32mI (7065) openssl_example: OK[0m
wolfSSL Entering wolfSSL_get_cipher
wolfSSL Entering SSL_get_current_cipher
wolfSSL Entering SSL_CIPHER_get_name
wolfSSL Entering wolfSSL_get_cipher_name_from_suite
READ USED CIPHERSUITE: NONE
[0;32mI (7085) openssl_example: send https request to www.howsmyssl.com port 443 ......[0m
wolfSSL Entering SSL_write()
handshake not complete, trying to finish
wolfSSL Entering wolfSSL_negotiate
wolfSSL Entering SSL_connect()
ProcessReply retry in error state, not allowed
wolfSSL error occurred, error = -313
wolfSSL Leaving wolfSSL_negotiate, return -1
wolfSSL Leaving SSL_write(), return -1
[0;32mI (7115) openssl_example: failed[0m
wolfSSL Entering SSL_shutdown()
wolfSSL Leaving SSL_shutdown(), return -1
wolfSSL Entering SSL_free
CTX ref count not 0 yet, no free
wolfSSL Leaving SSL_free, return 0
wolfSSL Entering SSL_CTX_free
CTX ref count down to 0, doing full free
wolfSSL Entering wolfSSL_CertManagerFree
wolfSSL Leaving SSL_CTX_free, return 0
I (14055) wifi: pm start, type:0

更新 我尝试连接到www.google.com，这成功了。我的代码没有变化，所以我认为这将是一个服务器问题。但是，当我使用mbedtls连接到www.howsmyssl.com时，请求也会成功，在通过嗅探网络比较数据包之后，我看不出任何重大差异。

Answer 1

仅仅从客户端分享客户端Hello 对此没有帮助。您需要收集一些与SSL相关的日志。我不是 wolfssl 专家，但看起来它在使用--enable-debug编译它时会暴露其他日志。我提到了这个：WolfSL - SSL Alert fatal error

密码套件并不是唯一可能出错的东西。如果服务器预期某种格式的客户端Hello 中存在某个 TLS扩展，并且即使在这种情况下也未被接受，服务器可以终止握手。

请参阅此主题以供参考：SSL handshake_failure after clientHello

没有调试日志，就像在黑暗中拍摄一样。

<强>更新

所以这些是日志中的错误：

wolfSSL error occurred, error = 40
wolfSSL error occurred, error = -313

313表示服务器要么不喜欢客户端发送的以下内容之一：

• 密码套件
• TLS扩展程序

由于您已经指定了支持的曲线，因此您可以尝试启用静态密钥密码套件。默认情况下，这些似乎在 WolfSSL 中被禁用。 WolfSSL - Supported Cipher Suites