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chore : csr approval example using json patch net package (#816)
* chore : csr approval example using json patch net package * chore : use top level feature, remove k8s client and use reference instead * chore : remove target framework * fix : remove redundant reference package
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kibernetik542
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Apr 1, 2022
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| using System.Net; | ||
| using System.Security.Cryptography; | ||
| using System.Security.Cryptography.X509Certificates; | ||
| using System.Text; | ||
| using System.Text.Json; | ||
| using Json.Patch; | ||
| using k8s; | ||
| using k8s.Models; | ||
|
|
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| string GenerateCertificate(string name) | ||
| { | ||
| var sanBuilder = new SubjectAlternativeNameBuilder(); | ||
| sanBuilder.AddIpAddress(IPAddress.Loopback); | ||
| sanBuilder.AddIpAddress(IPAddress.IPv6Loopback); | ||
| sanBuilder.AddDnsName("localhost"); | ||
| sanBuilder.AddDnsName(Environment.MachineName); | ||
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| var distinguishedName = new X500DistinguishedName(name); | ||
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| using var rsa = RSA.Create(4096); | ||
| var request = new CertificateRequest(distinguishedName, rsa, HashAlgorithmName.SHA256,RSASignaturePadding.Pkcs1); | ||
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| request.CertificateExtensions.Add(new X509KeyUsageExtension(X509KeyUsageFlags.DataEncipherment | X509KeyUsageFlags.KeyEncipherment | X509KeyUsageFlags.DigitalSignature , false)); | ||
| request.CertificateExtensions.Add(new X509EnhancedKeyUsageExtension(new OidCollection { new ("1.3.6.1.5.5.7.3.1") }, false)); | ||
| request.CertificateExtensions.Add(sanBuilder.Build()); | ||
| var csr = request.CreateSigningRequest(); | ||
| var pemKey = "-----BEGIN CERTIFICATE REQUEST-----\r\n" + | ||
| Convert.ToBase64String(csr) + | ||
| "\r\n-----END CERTIFICATE REQUEST-----"; | ||
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| return pemKey; | ||
| } | ||
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| var config = KubernetesClientConfiguration.BuildConfigFromConfigFile(); | ||
| IKubernetes client = new Kubernetes(config); | ||
| Console.WriteLine("Starting Request!"); | ||
| var name = "demo"; | ||
| var x509 = GenerateCertificate(name); | ||
| var encodedCsr= Encoding.UTF8.GetBytes(x509); | ||
|
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| var request = new V1CertificateSigningRequest | ||
| { | ||
| ApiVersion = "certificates.k8s.io/v1", | ||
| Kind = "CertificateSigningRequest", | ||
| Metadata = new V1ObjectMeta | ||
| { | ||
| Name = name | ||
| }, | ||
| Spec = new V1CertificateSigningRequestSpec | ||
| { | ||
| Request = encodedCsr, | ||
| SignerName = "kubernetes.io/kube-apiserver-client", | ||
| Usages = new List<string> { "client auth" }, | ||
| ExpirationSeconds = 600 // minimum should be 10 minutes | ||
| } | ||
| }; | ||
|
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| await client.CreateCertificateSigningRequestAsync(request); | ||
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| var serializeOptions = new JsonSerializerOptions | ||
| { | ||
| PropertyNamingPolicy = JsonNamingPolicy.CamelCase, | ||
| WriteIndented = true | ||
| }; | ||
| var readCert = await client.ReadCertificateSigningRequestAsync(name); | ||
| var old = JsonSerializer.SerializeToDocument(readCert, serializeOptions); | ||
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| var replace = new List<V1CertificateSigningRequestCondition> | ||
| { | ||
| new("True", "Approved", DateTime.UtcNow, DateTime.UtcNow, "This certificate was approved by k8s client", "Approve") | ||
| }; | ||
| readCert.Status.Conditions = replace; | ||
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| var expected = JsonSerializer.SerializeToDocument(readCert, serializeOptions); | ||
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| var patch = old.CreatePatch(expected); | ||
| await client.PatchCertificateSigningRequestApprovalAsync(new V1Patch(patch, V1Patch.PatchType.JsonPatch), name); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
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||
| <ItemGroup> | ||
| <PackageReference Include="JsonPatch.Net" Version="1.1.2" /> | ||
| </ItemGroup> | ||
| </Project> |
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