ios - 由于 BoringSSL 证书验证失败，iOS 上的安全 websocket 连接失败

Question

由于 iOS(12 和 13)上的以下错误，我无法连接到安全的 websocket 连接。

似乎验证端点证书失败，但我找不到确定原因的方法。我可以从浏览器客户端连接到 websocket 端点。我还使用 https://www.ssllabs.com/ssltest/ 验证了证书并且看不到任何问题。 SSL 证书由 Let's Encrypt 颁发。

下面是我可以从我的 mac 笔记本电脑上的设备和控制台应用程序捕获的控制台输出:

XCODE 调试控制台

2020-04-29 16:18:03.501170-0700 [BoringSSL] boringssl_context_handle_fatal_alert(1873) [C12.1:1][0x1151122e0] write alert, level: fatal, description: certificate unknown 
2020-04-29 16:18:03.501366-0700 [BoringSSL] boringssl_context_error_print(1863) boringssl ctx 0x282eb41b0: 4450062232:error:1000007d:SSL routines:OPENSSL_internal:CERTIFICATE_VERIFY_FAILED:/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/boringssl/boringssl-283.102.1/ssl/handshake.cc:369: 
2020-04-29 16:18:03.510648-0700 [BoringSSL] boringssl_session_handshake_incomplete(164) [C12.1:1][0x1151122e0] SSL library error 
2020-04-29 16:18:03.510740-0700 [BoringSSL] boringssl_session_handshake_error_print(111) [C12.1:1][0x1151122e0] 4450062232:error:1000007d:SSL routines:OPENSSL_internal:CERTIFICATE_VERIFY_FAILED:/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/boringssl/boringssl-283.102.1/ssl/handshake.cc:369: 
2020-04-29 16:18:03.510837-0700 [BoringSSL] nw_protocol_boringssl_handshake_negotiate_proceed(726) [C12.1:1][0x1151122e0] handshake failed at state 12288 
2020-04-29 16:18:03.532541-0700 [strings] ERROR: Network.NWError not found in table Error of bundle CFBundle 0x109308b40 </System/Library/Frameworks/CoreFoundation.framework> (framework, loaded) 
🛑 error: Optional("The operation couldn’t be completed. (NETWORK.NWERROR error 2.)")

MAC 控制台应用程序

default 16:18:03.712414-0700    boringssl_session_handshake_incomplete(170) [C12.1:1][0x1151122e0] Handshake incomplete: waiting for data to read [2]
default 16:18:03.712477-0700    boringssl_session_handshake_incomplete(170) [C12.1:1][0x1151122e0] Handshake incomplete: waiting for data to read [2]
default 16:18:03.712583-0700    boringssl_session_handshake_incomplete(170) [C12.1:1][0x1151122e0] Handshake incomplete: waiting for data to read [2]
default 16:18:03.712646-0700    boringssl_session_handshake_incomplete(170) [C12.1:1][0x1151122e0] Handshake incomplete: waiting for data to read [2]
default 16:18:03.712707-0700    boringssl_context_message_handler(2258) [C12.1:1][0x1151122e0] Reading SSL3_RT_HANDSHAKE 122 bytes
default 16:18:03.713628-0700    boringssl_context_info_handler(1983) [C12.1:1][0x1151122e0] Client handshake state: TLS 1.3 client read_hello_retry_request
default 16:18:03.713687-0700    boringssl_context_add_handshake_message_pending(578) [C12.1:1][0x1151122e0] Adding message(2)
default 16:18:03.713747-0700    boringssl_context_message_handler(2258) [C12.1:1][0x1151122e0] Writing SSL3_RT_CHANGE_CIPHER_SPEC 1 bytes
default 16:18:03.713807-0700    boringssl_context_info_handler(1983) [C12.1:1][0x1151122e0] Client handshake state: TLS 1.3 client read_server_hello
default 16:18:03.713865-0700    boringssl_context_info_handler(1983) [C12.1:1][0x1151122e0] Client handshake state: TLS 1.3 client read_encrypted_extensions
default 16:18:03.714153-0700    boringssl_context_message_handler(2258) [C12.1:1][0x1151122e0] Reading SSL3_RT_HANDSHAKE 10 bytes
default 16:18:03.714219-0700    boringssl_context_info_handler(1983) [C12.1:1][0x1151122e0] Client handshake state: TLS 1.3 client read_certificate_request
default 16:18:03.714277-0700    boringssl_context_message_handler(2258) [C12.1:1][0x1151122e0] Reading SSL3_RT_HANDSHAKE 3105 bytes
default 16:18:03.714335-0700    boringssl_context_info_handler(1983) [C12.1:1][0x1151122e0] Client handshake state: TLS 1.3 client read_server_certificate
default 16:18:03.714395-0700    boringssl_context_info_handler(1983) [C12.1:1][0x1151122e0] Client handshake state: TLS 1.3 client read_server_certificate_verify
default 16:18:03.714452-0700    boringssl_context_message_handler(2258) [C12.1:1][0x1151122e0] Reading SSL3_RT_HANDSHAKE 264 bytes
default 16:18:03.714628-0700    boringssl_context_copy_peer_sct_list(1003) [C12.1:1][0x1151122e0] SSL_get0_signed_cert_timestamp_list returned no SCT extension data
default 16:18:03.714914-0700    boringssl_helper_create_sec_trust_with_certificates(607) [C12.1:1][0x1151122e0] SecTrustCreateWithCertificates result: 0
default 16:18:03.714973-0700    boringssl_helper_create_sec_trust_with_certificates(612) [C12.1:1][0x1151122e0] SecTrustSetOCSPResponse result: 0
default 16:18:03.715033-0700    boringssl_helper_create_sec_trust_with_certificates(621) [C12.1:1][0x1151122e0] No TLS-provided SCTs
default 16:18:03.715167-0700    boringssl_context_certificate_verify_callback(2071) [C12.1:1][0x1151122e0] Asyncing for verify block
default 16:18:03.715225-0700    boringssl_session_handshake_incomplete(170) [C12.1:1][0x1151122e0] Handshake incomplete: certificate evaluation result pending [16]
default 16:18:03.715418-0700    boringssl_context_certificate_verify_callback(2040) [C12.1:1][0x1151122e0] Verification already in progress.
default 16:18:03.715481-0700    boringssl_session_handshake_incomplete(170) [C12.1:1][0x1151122e0] Handshake incomplete: certificate evaluation result pending [16]
default 16:18:03.716084-0700    boringssl_context_certificate_verify_callback(2040) [C12.1:1][0x1151122e0] Verification already in progress.
default 16:18:03.716145-0700    boringssl_session_handshake_incomplete(170) [C12.1:1][0x1151122e0] Handshake incomplete: certificate evaluation result pending [16]
default 16:19:16.180121-0700    boringssl_context_message_handler(2258) [C6.1:2][0x11321ccb0] Writing SSL3_RT_ALERT 2 bytes
default 16:19:16.180202-0700    boringssl_context_handle_warning_alert(1893) [C6.1:2][0x11321ccb0] write alert, level: warning, description: close notify
default 16:19:16.180285-0700    boringssl_session_disconnect(504) [C6.1:2][0x11321ccb0] SSL_shutdown 0
default 16:19:16.181104-0700    nw_protocol_boringssl_remove_input_handler(1012) [C6.1:2][0x11321ccb0] nw_protocol_boringssl_remove_input_handler forced true
default 16:19:16.181169-0700    nw_protocol_boringssl_remove_input_handler(1030) [C6.1:2][0x11321ccb0] Transferring nw_protocol_boringssl_t handle back into ARC for autorelease
default 16:19:33.510159-0700    boringssl_context_message_handler(2258) [C8.1:2][0x11328fd50] Writing SSL3_RT_ALERT 2 bytes
default 16:19:33.510247-0700    boringssl_context_handle_warning_alert(1893) [C8.1:2][0x11328fd50] write alert, level: warning, description: close notify
default 16:19:33.510309-0700    boringssl_session_disconnect(504) [C8.1:2][0x11328fd50] SSL_shutdown 0
default 16:19:33.510922-0700    nw_protocol_boringssl_remove_input_handler(1012) [C8.1:2][0x11328fd50] nw_protocol_boringssl_remove_input_handler forced true
default 16:19:33.511105-0700    nw_protocol_boringssl_remove_input_handler(1030) [C8.1:2][0x11328fd50] Transferring nw_protocol_boringssl_t handle back into ARC for autorelease

端点的 NGINX 服务器 block 是:

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name me.example.com;

    ssl_certificate /etc/letsencrypt/live/me.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/me.example.com/privkey.pem;
    ssl_trusted_certificate /etc/letsencrypt/live/me.example.com/chain.pem;

    location /ws {
        proxy_pass http://upstreamserver;

        proxy_http_version  1.1;
        proxy_set_header    Upgrade $http_upgrade;
        proxy_set_header    Connection $connection_upgrade;
        proxy_set_header    Host $host;
        proxy_set_header    X-Real-IP $remote_addr;
        proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header    X-Forwarded-Protocol $scheme;
    }
}

关于为什么这是 iOS 上的问题有什么想法吗？我也在 Apple's Dev Forums 中发布了这个

Answer 1

我刚刚编写了一个类来帮助处理套接字和新的苹果 TLS 限制(请参阅我的自述文件)。您很可能错误配置了证书。除了处理套接字的助手类之外，我还尝试设计如何创建适用于新的 iOS TLS 限制的证书。

https://github.com/eamonwhiter73/IOSObjCWebSockets