我无法使用System.Net.WebRequestTLS 1.2 进行请求。如果我这样做，我会收到异常The request was aborted: Could not create SSL/TLS secure channel.和协议错误Handshake Failure。
通过 TLS 1.2 进行连接和身份验证可与 Internet Explorer 和 Chrome 配合使用。OpenSSL 可以通过 TLS 1.2 连接到此端点。
设置
- 使用 ClientCertificates 进行身份验证
- 使用非默认端口
- 使用 TLS 1.2
- Endpoint 是一个 haproxy，但是这是一个黑盒
- .NET 4.7 和 C#
代码片段
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
var req = WebRequest.Create($"https://{host}:{port}");
((HttpWebRequest)req).ClientCertificates = new X509Certificate2Collection(GetCertificate());
var requestStream = req.GetRequestStream();
Wireshark
按照发生顺序从 wireshark 输出的文本。
客户端问候
Secure Sockets Layer
TLSv1.2 Record Layer: Handshake Protocol: Client Hello
Content Type: Handshake (22)
Version: TLS 1.2 (0x0303)
Length: 207
Handshake Protocol: Client Hello
Handshake Type: Client Hello (1)
Length: 203
Version: TLS 1.2 (0x0303)
Random: 5a292ab72d2173fc286aebe2c4cc991ee619e1cc81b5bb39...
Session ID Length: 0
Cipher Suites Length: 60
Cipher Suites (30 suites)
Compression Methods Length: 1
Compression Methods (1 method)
Extensions Length: 102
Extension: server_name (len=43)
Type: server_name (0)
Length: 43
Server Name Indication extension
Server Name list length: 41
Server Name Type: host_name (0)
Server Name length: 38
Server Name: [REMOVED]
Extension: supported_groups (len=8)
Type: supported_groups (10)
Length: 8
Supported Groups List Length: 6
Supported Groups (3 groups)
Extension: ec_point_formats (len=2)
Type: ec_point_formats (11)
Length: 2
EC point formats Length: 1
Elliptic curves point formats (1)
Extension: signature_algorithms (len=20)
Type: signature_algorithms (13)
Length: 20
Signature Hash Algorithms Length: 18
Signature Hash Algorithms (9 algorithms)
Extension: SessionTicket TLS (len=0)
Type: SessionTicket TLS (35)
Length: 0
Data (0 bytes)
Extension: extended_master_secret (len=0)
Type: extended_master_secret (23)
Length: 0
Extension: renegotiation_info (len=1)
Type: renegotiation_info (65281)
Length: 1
Renegotiation Info extension
Renegotiation info extension length: 0
Server Name: [REMOVED]包含正确的服务器名称。
服务器问候
Secure Sockets Layer
TLSv1.2 Record Layer: Handshake Protocol: Server Hello
Content Type: Handshake (22)
Version: TLS 1.2 (0x0303)
Length: 65
Handshake Protocol: Server Hello
Handshake Type: Server Hello (2)
Length: 61
Version: TLS 1.2 (0x0303)
Random: 5a292ab7238205b2b8a2e6692abfd518a054515e53cd5b16...
Session ID Length: 0
Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)
Compression Method: null (0)
Extensions Length: 21
Extension: server_name (len=0)
Type: server_name (0)
Length: 0
Extension: renegotiation_info (len=1)
Type: renegotiation_info (65281)
Length: 1
Renegotiation Info extension
Renegotiation info extension length: 0
Extension: ec_point_formats (len=4)
Type: ec_point_formats (11)
Length: 4
EC point formats Length: 3
Elliptic curves point formats (3)
Extension: SessionTicket TLS (len=0)
Type: SessionTicket TLS (35)
Length: 0
Data (0 bytes)
证书
Secure Sockets Layer
TLSv1.2 Record Layer: Handshake Protocol: Certificate
Content Type: Handshake (22)
Version: TLS 1.2 (0x0303)
Length: 3855
Handshake Protocol: Certificate
Handshake Type: Certificate (11)
Length: 3851
Certificates Length: 3848
Certificates (3848 bytes)
服务器你好，完成
Secure Sockets Layer
TLSv1.2 Record Layer: Handshake Protocol: Server Key Exchange
Content Type: Handshake (22)
Version: TLS 1.2 (0x0303)
Length: 589
Handshake Protocol: Server Key Exchange
Handshake Type: Server Key Exchange (12)
Length: 585
EC Diffie-Hellman Server Params
Curve Type: named_curve (0x03)
Named Curve: secp256r1 (0x0017)
Pubkey Length: 65
Pubkey: ...
Signature Hash Algorithm: 0x0401
Signature Length: 512
Signature: ...
多次握手消息
Secure Sockets Layer
TLSv1.2 Record Layer: Handshake Protocol: Multiple Handshake Messages
Content Type: Handshake (22)
Version: TLS 1.2 (0x0303)
Length: 77
Handshake Protocol: Certificate
Handshake Type: Certificate (11)
Length: 3
Certificates Length: 0
Handshake Protocol: Client Key Exchange
Handshake Type: Client Key Exchange (16)
Length: 66
EC Diffie-Hellman Client Params
Pubkey Length: 65
Pubkey: ...
TLSv1.2 Record Layer: Change Cipher Spec Protocol: Change Cipher Spec
Content Type: Change Cipher Spec (20)
Version: TLS 1.2 (0x0303)
Length: 1
Change Cipher Spec Message
TLSv1.2 Record Layer: Handshake Protocol: Encrypted Handshake Message
Content Type: Handshake (22)
Version: TLS 1.2 (0x0303)
Length: 40
Handshake Protocol: Encrypted Handshake Message
使用 Internet Explorer 时，此部分会有所不同。在这种情况下，会列出很多证书。
Handshake Protocol: Certificate
Handshake Type: Certificate (11)
Length: 3
Certificates Length: 0
握手失败
Secure Sockets Layer
TLSv1.2 Record Layer: Alert (Level: Fatal, Description: Handshake Failure)
Content Type: Alert (21)
Version: TLS 1.2 (0x0303)
Length: 2
Alert Message
Level: Fatal (2)
Description: Handshake Failure (40)
我不确定在哪里发布（Serverfault 与 Stackoverflow），所以我也在这里发布了这个https://stackoverflow.com/q/47697982/1776231