问题
Exception message:
Grpc.Core.RpcException: 'Status(StatusCode="Unavailable", Detail="failed to connect to all addresses", DebugException="Grpc.Core.Internal.CoreErrorDetailException: {"created":"@1606657072.668000000","description":"Failed to pick subchannel","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x86\src\core\ext\filters\client_channel\client_channel.cc","file_line":4166,"referenced_errors":[{"created":"@1606657072.668000000","description":"failed to connect to all addresses","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x86\src\core\ext\filters\client_channel\lb_policy\pick_first\pick_first.cc","file_line":398,"grpc_status":14}]}")'
I've created an example on GitHub which you can easily tweak, play with, and answer this question if you succeed to solve the problem.
grpc_certifier_example
...
I've figured out that the problem is in my own certificates and I am unable to create my own that work, tried numerous combinations.
I've used this example to generate my certificates: How to enable server side SSL for gRPC?
and tested it on this example: https://github.com/angelagyang/GRPCProtobufExample
回答1:
The problem is in the certificate and its CN=. CN=%COMPUTERNAME% must be server DNS or IP, in my case, it had to be localhost and the server needs to have a certificate with the key (pfx). The main problem is that it throws the exception with no relevant explanation.
Client:
//THIS IS YOUR CLIENT'S CERTIFICATE AND IT'S KEY
var keyCertPair = new KeyCertificatePair(File.ReadAllText($"{rootDir}/samplecert.pem.txt"), File.ReadAllText($"{rootDir}/samplecert.key.txt"));
//GetRootCertificates() GETS THE CA CERTIFICATE, NOT THE CLIENT CERTIFICATE NOR SERVER CERTIFICATE
var channelCreds = new SslCredentials(GetRootCertificates(), keyCertPair);
//YOU DON'T EVEN NEED TO PROVIDE KeyCertificatePair, IT WORKS WITH JUST A CA ROOT
var channelCreds = new SslCredentials(GetRootCertificates());
Server:
//LoadSSLCertificate() GETS THE SERVER CERTIFICATE
var sslCertificate = LoadSSLCertificate();
o.ListenAnyIP(5001, listenOptions =>
{
listenOptions.UseHttps(sslCertificate, httpsOptions =>
{
httpsOptions.SslProtocols = SslProtocols.Tls12;
httpsOptions.ClientCertificateMode = ClientCertificateMode.NoCertificate;
httpsOptions.ClientCertificateValidation = (certificate, chain, errors) =>
{
return true;
//return certificate.Thumbprint.Equals(_clientThumbprint, StringComparison.OrdinalIgnoreCase);
};
});
});
Certificates creation:
@echo off
REM set OPENSSL_CONF=c:\OpenSSL-Win64\bin\openssl.cfg
echo Generate CA key:
openssl genrsa -passout pass:1111 -des3 -out ca.key 4096
echo Generate CA certificate:
openssl req -passin pass:1111 -new -x509 -days 365 -key ca.key -out ca.crt -subj "/C=US/ST=CA/L=Cupertino/O=YourCompany/OU=YourApp/CN=MyRootCA"
echo Generate server key:
openssl genrsa -passout pass:1111 -des3 -out server.key 4096
echo Generate server signing request:
openssl req -passin pass:1111 -new -key server.key -out server.csr -subj "/C=US/ST=CA/L=Cupertino/O=YourCompany/OU=YourApp/CN=%COMPUTERNAME%"
echo Self-sign server certificate:
openssl x509 -req -passin pass:1111 -days 365 -in server.csr -CA ca.crt -CAkey ca.key -set_serial 01 -out server.crt
echo Remove passphrase from server key:
openssl rsa -passin pass:1111 -in server.key -out server.key
echo Generate client key
openssl genrsa -passout pass:1111 -des3 -out client.key 4096
echo Generate client signing request:
openssl req -passin pass:1111 -new -key client.key -out client.csr -subj "/C=US/ST=CA/L=Cupertino/O=YourCompany/OU=YourApp/CN=%CLIENT-COMPUTERNAME%"
echo Self-sign client certificate:
openssl x509 -passin pass:1111 -req -days 365 -in client.csr -CA ca.crt -CAkey ca.key -set_serial 01 -out client.crt
echo Remove passphrase from client key:
openssl rsa -passin pass:1111 -in client.key -out client.key
echo Create server.pfx file:
openssl pkcs12 -export -passout pass:1111 -out server.pfx -inkey server.key -in server.crt
来源:https://stackoverflow.com/questions/65057450/how-to-connect-grpc-nuget-2-33-client-net-framework-with-grpc-asp-netcore