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(.NET Core C#) Create JWK Set Containing CertificatesDemonstrates how to create a JWK Set containing N certificates.
// This example creates the following JWK Set from two certificates: // { // "keys": [ // { // "kty": "RSA", // "use": "sig", // "kid": "BB8CeFVqyaGrGNuehJIiL4dfjzw", // "x5t": "BB8CeFVqyaGrGNuehJIiL4dfjzw", // "n": "nYf1jpn7cFdQ...9Iw", // "e": "AQAB", // "x5c": [ // "MIIDBTCCAe2...Z+NTZo" // ] // }, // { // "kty": "RSA", // "use": "sig", // "kid": "M6pX7RHoraLsprfJeRCjSxuURhc", // "x5t": "M6pX7RHoraLsprfJeRCjSxuURhc", // "n": "xHScZMPo8F...EO4QQ", // "e": "AQAB", // "x5c": [ // "MIIC8TCCAdmgA...Vt5432GA==" // ] // } // ] // } // First get two certificates from files. Chilkat.Cert cert1 = new Chilkat.Cert(); bool success = cert1.LoadFromFile("qa_data/certs/brasil_cert.pem"); if (success != true) { Debug.WriteLine(cert1.LastErrorText); return; } Chilkat.Cert cert2 = new Chilkat.Cert(); success = cert2.LoadFromFile("qa_data/certs/testCert.cer"); if (success != true) { Debug.WriteLine(cert2.LastErrorText); return; } // We'll need this crypt object re-encode the SHA1 thumbprint from hex to base64. Chilkat.Crypt2 crypt = new Chilkat.Crypt2(); Chilkat.JsonObject json = new Chilkat.JsonObject(); // Let's begin with the 1st cert: json.I = 0; json.UpdateString("keys[i].kty","RSA"); json.UpdateString("keys[i].use","sig"); string hexThumbprint = cert1.Sha1Thumbprint; string base64Thumbprint = crypt.ReEncode(hexThumbprint,"hex","base64"); json.UpdateString("keys[i].kid",base64Thumbprint); json.UpdateString("keys[i].x5t",base64Thumbprint); // (We're assuming these are RSA certificates) // To get the modulus (n) and exponent (e), we need to get the cert's public key and then get its JWK. Chilkat.PublicKey pubKey = cert1.ExportPublicKey(); Chilkat.JsonObject pubKeyJwk = new Chilkat.JsonObject(); pubKeyJwk.Load(pubKey.GetJwk()); json.UpdateString("keys[i].n",pubKeyJwk.StringOf("n")); json.UpdateString("keys[i].e",pubKeyJwk.StringOf("e")); // Now add the entire X.509 certificate json.UpdateString("keys[i].x5c[0]",cert1.GetEncoded()); // Now do the same for cert2.. json.I = 1; json.UpdateString("keys[i].kty","RSA"); json.UpdateString("keys[i].use","sig"); hexThumbprint = cert2.Sha1Thumbprint; base64Thumbprint = crypt.ReEncode(hexThumbprint,"hex","base64"); json.UpdateString("keys[i].kid",base64Thumbprint); json.UpdateString("keys[i].x5t",base64Thumbprint); pubKey = cert2.ExportPublicKey(); pubKeyJwk.Load(pubKey.GetJwk()); json.UpdateString("keys[i].n",pubKeyJwk.StringOf("n")); json.UpdateString("keys[i].e",pubKeyJwk.StringOf("e")); // Now add the entire X.509 certificate json.UpdateString("keys[i].x5c[0]",cert2.GetEncoded()); // Emit the JSON.. json.EmitCompact = false; Debug.WriteLine(json.Emit()); |
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