|
| 1 | +using System.Net; |
| 2 | +using System.Security.Cryptography; |
| 3 | +using System.Security.Cryptography.X509Certificates; |
| 4 | +using System.Text; |
| 5 | +using System.Text.Json; |
| 6 | +using Json.Patch; |
| 7 | +using k8s; |
| 8 | +using k8s.Models; |
| 9 | + |
| 10 | +string GenerateCertificate(string name) |
| 11 | +{ |
| 12 | + var sanBuilder = new SubjectAlternativeNameBuilder(); |
| 13 | + sanBuilder.AddIpAddress(IPAddress.Loopback); |
| 14 | + sanBuilder.AddIpAddress(IPAddress.IPv6Loopback); |
| 15 | + sanBuilder.AddDnsName("localhost"); |
| 16 | + sanBuilder.AddDnsName(Environment.MachineName); |
| 17 | + |
| 18 | + var distinguishedName = new X500DistinguishedName(name); |
| 19 | + |
| 20 | + using var rsa = RSA.Create(4096); |
| 21 | + var request = new CertificateRequest(distinguishedName, rsa, HashAlgorithmName.SHA256,RSASignaturePadding.Pkcs1); |
| 22 | + |
| 23 | + request.CertificateExtensions.Add(new X509KeyUsageExtension(X509KeyUsageFlags.DataEncipherment | X509KeyUsageFlags.KeyEncipherment | X509KeyUsageFlags.DigitalSignature , false)); |
| 24 | + request.CertificateExtensions.Add(new X509EnhancedKeyUsageExtension(new OidCollection { new ("1.3.6.1.5.5.7.3.1") }, false)); |
| 25 | + request.CertificateExtensions.Add(sanBuilder.Build()); |
| 26 | + var csr = request.CreateSigningRequest(); |
| 27 | + var pemKey = "-----BEGIN CERTIFICATE REQUEST-----\r\n" + |
| 28 | + Convert.ToBase64String(csr) + |
| 29 | + "\r\n-----END CERTIFICATE REQUEST-----"; |
| 30 | + |
| 31 | + return pemKey; |
| 32 | +} |
| 33 | + |
| 34 | +var config = KubernetesClientConfiguration.BuildConfigFromConfigFile(); |
| 35 | +IKubernetes client = new Kubernetes(config); |
| 36 | +Console.WriteLine("Starting Request!"); |
| 37 | +var name = "demo"; |
| 38 | +var x509 = GenerateCertificate(name); |
| 39 | +var encodedCsr= Encoding.UTF8.GetBytes(x509); |
| 40 | + |
| 41 | +var request = new V1CertificateSigningRequest |
| 42 | +{ |
| 43 | + ApiVersion = "certificates.k8s.io/v1", |
| 44 | + Kind = "CertificateSigningRequest", |
| 45 | + Metadata = new V1ObjectMeta |
| 46 | + { |
| 47 | + Name = name |
| 48 | + }, |
| 49 | + Spec = new V1CertificateSigningRequestSpec |
| 50 | + { |
| 51 | + Request = encodedCsr, |
| 52 | + SignerName = "kubernetes.io/kube-apiserver-client", |
| 53 | + Usages = new List<string> { "client auth" }, |
| 54 | + ExpirationSeconds = 600 // minimum should be 10 minutes |
| 55 | + } |
| 56 | +}; |
| 57 | + |
| 58 | +await client.CreateCertificateSigningRequestAsync(request); |
| 59 | + |
| 60 | +var serializeOptions = new JsonSerializerOptions |
| 61 | +{ |
| 62 | + PropertyNamingPolicy = JsonNamingPolicy.CamelCase, |
| 63 | + WriteIndented = true |
| 64 | +}; |
| 65 | +var readCert = await client.ReadCertificateSigningRequestAsync(name); |
| 66 | +var old = JsonSerializer.SerializeToDocument(readCert, serializeOptions); |
| 67 | + |
| 68 | +var replace = new List<V1CertificateSigningRequestCondition> |
| 69 | +{ |
| 70 | + new("True", "Approved", DateTime.UtcNow, DateTime.UtcNow, "This certificate was approved by k8s client", "Approve") |
| 71 | +}; |
| 72 | +readCert.Status.Conditions = replace; |
| 73 | + |
| 74 | +var expected = JsonSerializer.SerializeToDocument(readCert, serializeOptions); |
| 75 | + |
| 76 | +var patch = old.CreatePatch(expected); |
| 77 | +await client.PatchCertificateSigningRequestApprovalAsync(new V1Patch(patch, V1Patch.PatchType.JsonPatch), name); |
0 commit comments