Initial commit:

* Basic ACME-compatible JWS encoding
* Validated RFC 7515 compatibility for JWS Flattened JSON Serialization
* Starting the root ACME client interface
* Validated boulder interoperability with a basic "new-reg" request

.gitattributes

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letsencrypt-win/LetsEncrypt.ACME-test/AcmeClientUnitTests.cs

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+using System;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace LetsEncrypt.ACME
+{
+    [TestClass]
+    public class AcmeClientUnitTests
+    {
+        Uri _rootUrl = new Uri("http://acme2.aws3.ezshield.ws:4000/");
+
+        [TestMethod]
+        public void TestInit()
+        {
+            var client = new AcmeClient();
+            client.RootUrl = _rootUrl;
+
+            client.Init();
+        }
+
+        [TestMethod]
+        public void TestGetDirectory()
+        {
+            var client = new AcmeClient();
+            client.RootUrl = _rootUrl;
+
+            var acmeDir = client.GetDirectory();
+        }
+
+
+        [TestMethod]
+        public void TestRegister()
+        {
+            var client = new AcmeClient();
+            client.RootUrl = _rootUrl;
+            client.Register(new string[] {
+                "mailto:letsencrypt@mailinator.com",
+                "tel:+14109361212",
+            });
+        }
+    }
+}

letsencrypt-win/LetsEncrypt.ACME-test/AcmeUnitTest1.cs

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+using System;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Newtonsoft.Json;
+using LetsEncrypt.ACME.JOSE;
+using System.Net;
+using System.Linq;
+using System.Text;
+
+namespace LetsEncrypt.ACME
+{
+    [TestClass]
+    public class AcmeUnitTest1
+    {
+        Uri _rootUrl = new Uri("http://acme2.aws3.ezshield.ws:4000/");
+
+        [TestMethod]
+        public void TestNewReg()
+        {
+            var requ = WebRequest.Create(_rootUrl);
+            var resp = requ.GetResponse();
+            Assert.IsNotNull(resp);
+
+            var nonceKey = resp.Headers.AllKeys.FirstOrDefault(
+                    x => x.Equals("Replay-nonce", StringComparison.OrdinalIgnoreCase));
+            Assert.IsFalse(string.IsNullOrEmpty(nonceKey));
+            var nonceValue = resp.Headers[nonceKey];
+
+            var newReg = new
+            {
+                resource = "new-reg",
+                contact = new string[]
+                {
+                    "mailto:cert-admin@example.com",
+                    "tel:+12025551212"
+                },
+            };
+            var newRegSer = JsonConvert.SerializeObject(newReg);
+
+            var algSigner = new RS256Signer();
+            algSigner.Init();
+
+            var unprotectedHeader = new
+            {
+                alg = "RS256",
+                jwk = algSigner.ExportJwk()
+            };
+            var protectedHeader = new
+            {
+                nonce = nonceValue,
+            };
+
+            var acmeJson = JwsHelper.SignFlatJson(algSigner.Sign, newRegSer,
+                    protectedHeader, unprotectedHeader);
+            var acmeJsonBytes = Encoding.ASCII.GetBytes(acmeJson);
+
+            requ = WebRequest.Create(new Uri(_rootUrl, "/acme/new-reg"));
+            requ.Method = "POST";
+            requ.ContentType = "application/json";
+            requ.ContentLength = acmeJsonBytes.Length;
+            using (var s = requ.GetRequestStream())
+            {
+                s.Write(acmeJsonBytes, 0, acmeJsonBytes.Length);
+            }
+            resp = requ.GetResponse();
+        }
+    }
+}

letsencrypt-win/LetsEncrypt.ACME-test/JwsHelperUnitTests.cs

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+using System;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using LetsEncrypt.ACME.JOSE;
+using System.Text.RegularExpressions;
+
+namespace LetsEncrypt.ACME
+{
+    [TestClass]
+    public class JwsHelperUnitTests
+    {
+        [TestMethod]
+        public void TestSignFlagJson()
+        {
+            Func<byte[], byte[]> sigFunc = (x) =>
+            {
+                using (var rsa = new System.Security.Cryptography.RSACryptoServiceProvider())
+                {
+                    rsa.ImportParameters(JwsUnitTests.GetRsaParamsForRfc7515Example_A_2_1());
+                    using (var sha256 = new System.Security.Cryptography.SHA256CryptoServiceProvider())
+                    {
+                        return rsa.SignData(x, sha256);
+                    }
+                }
+            };
+
+            object protectedSample = new // From the RFC example
+            {
+                alg = "RS256"
+            };
+            object headerSample = new // From the RFC example
+            {
+                kid = "2010-12-29"
+            };
+            string payloadSample = // From the RFC example
+                    "{\"iss\":\"joe\",\r\n" +
+                    " \"exp\":1300819380,\r\n" +
+                    " \"http://example.com/is_root\":true}";
+
+            var wsRegex = new Regex("\\s+");
+            var sigExpected = // Derived from the RFC example in A.6.4
+                    wsRegex.Replace(@"{
+                        ""payload"":""eyJpc3MiOiJqb2UiLA0KICJleHAiOjEzMDA4MTkzODAsDQogImh0dHA6Ly9leGFtcGxlLmNvbS9pc19yb290Ijp0cnVlfQ"",
+                        ""protected"":""eyJhbGciOiJSUzI1NiJ9"",
+                        ""header"":{""kid"":""2010-12-29""},
+                        ""signature"":
+                            ""cC4hiUPoj9Eetdgtv3hF80EGrhuB__dzERat0XF9g2VtQgr9PJbu3XOiZj5RZ
+                            mh7AAuHIm4Bh-0Qc_lF5YKt_O8W2Fp5jujGbds9uJdbF9CUAr7t1dnZcAcQjb
+                            KBYNX4BAynRFdiuB--f_nZLgrnbyTyWzO75vRK5h6xBArLIARNPvkSjtQBMHl
+                            b1L07Qe7K0GarZRmB_eSN9383LcOLn6_dO--xi12jzDwusC-eOkHWEsqtFZES
+                            c6BfI7noOPqvhJ1phCnvWh6IeYI2w9QOYEUipUTI8np6LbgGY9Fs98rqVt5AX
+                            LIhWkWywlVmtVrBp0igcN_IoypGlUPQGe77Rw""
+                    }", "");
+            var sigActual = wsRegex.Replace(JwsHelper.SignFlatJson(
+                    sigFunc, payloadSample, protectedSample, headerSample), "");
+            Assert.AreEqual(sigExpected, sigActual);
+        }
+    }
+}