TLS 1.3 的 SSL 握手失败

Question

curl 在 openssl 版本 1.1.1d 上失败但在 OpenSSL/1.0.1t 上工作正常。我正在尝试调试原因，但无法找到原因。

请从 curl 日志中找到以下跟踪信息。

失败案例 (curl 7.64.0 (x86_64-pc-linux-gnu) libcurl/7.64.0 OpenSSL/1.1.1d)

  CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
* TLSv1.3 (IN), TLS alert, handshake failure (552):
* error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure
* Closing connection 0
curl: (35) error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure

成功案例。卸载的 curl 和安装的 curl 版本 curl 7.38.0 (x86_64-pc-linux-gnu) libcurl/7.38.0 OpenSSL/1.0.1t

* Connected to kafkaconnect-0.kc.default.svc.cluster.local (10.244.4.107) port 443 (#0)
* successfully set certificate verify locations:
*   CAfile: none
  CApath: /etc/ssl/certs
* SSLv3, TLS handshake, Client hello (1):
* SSLv3, TLS handshake, Server hello (2):
* SSLv3, TLS handshake, CERT (11):
* SSLv3, TLS handshake, Server key exchange (12):
* SSLv3, TLS handshake, Server finished (14):
* SSLv3, TLS handshake, Client key exchange (16):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / DHE-DSS-AES256-GCM-SHA384
* Server certificate:
*    subject: CN=*.kc.default.svc.cluster.local.keystore.jks
*    start date: 2021-04-16 17:01:03 GMT
*    expire date: 2023-04-16 17:01:03 GMT
*    issuer: CN=Red-Security-CA
*    SSL certificate verify result: self signed certificate in certificate chain (19), continuing anyway.
> GET /connectors HTTP/1.1
> User-Agent: curl/7.38.0

Observations.
1. With older version, it was using SSLv3 and with latest version it is TLSv1.3

Answer 1

一个潜在的原因是没有为 OpenSSL 启用兼容的密码。在成功案例中，它似乎与

DHE-DSS-AES256-GCM-SHA384

一起工作。您可以通过将

--ciphers

命令行参数添加到 curl 来使用其他版本的 curl 测试该特定密码。

例如

curl <yoursitehere> --ciphers DHE-DSS-AES256-GCM-SHA384

您还可以通过查看

/etc/ssl/openssl.cnf

文件

CipherString

来查看为 OpenSSL 启用了哪些密码。请注意，有些不太安全/不安全，因此它们可能已被删除。