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-Win64inopenssl.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
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