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Code Issues Projects Releases Wiki Activity

No need for custom handler anymore - xam bug fixed

This commit is contained in:
Kyle Spearrin 2017-04-20 14:22:11 -04:00
parent 408d66ee74
commit a6bc44dc10
3 changed files with 1 additions and 776 deletions
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1
src/Android/Android.csproj
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@ -316,7 +316,6 @@
<Compile Include="Controls\ExtendedButtonRenderer.cs" />
<Compile Include="Controls\ExtendedTabbedPageRenderer.cs" />
<Compile Include="Controls\ExtendedTableViewRenderer.cs" />
<Compile Include="CustomAndroidClientHandler.cs" />
<Compile Include="HockeyAppCrashManagerListener.cs" />
<Compile Include="AutofillService.cs" />
<Compile Include="Controls\ExtendedEditorRenderer.cs" />

774
src/Android/CustomAndroidClientHandler.cs
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@ -1,774 +0,0 @@
using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Android.Runtime;
using Java.IO;
using Java.Net;
using Java.Security;
using Java.Security.Cert;
using Javax.Net.Ssl;
namespace Xamarin.Android.Net
{
/// <summary>
/// A custom implementation of <see cref="System.Net.Http.HttpClientHandler"/> which internally uses <see cref="Java.Net.HttpURLConnection"/>
/// (or its HTTPS incarnation) to send HTTP requests.
/// </summary>
/// <remarks>
/// <para>Instance of this class is used to configure <see cref="System.Net.Http.HttpClient"/> instance
/// in the following way:
///
/// <example>
/// var handler = new AndroidClientHandler {
/// UseCookies = true,
/// AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip,
/// };
///
/// var httpClient = new HttpClient (handler);
/// var response = httpClient.GetAsync ("http://example.com")?.Result as AndroidHttpResponseMessage;
/// </example></para>
/// <para>
/// The class supports pre-authentication of requests albeit in a slightly "manual" way. Namely, whenever a request to a server requiring authentication
/// is made and no authentication credentials are provided in the <see cref="PreAuthenticationData"/> property (which is usually the case on the first
/// request), the <see cref="RequestNeedsAuthorization"/> property will return <c>true</c> and the <see cref="RequestedAuthentication"/> property will
/// contain all the authentication information gathered from the server. The application must then fill in the blanks (i.e. the credentials) and re-send
/// the request configured to perform pre-authentication. The reason for this manual process is that the underlying Java HTTP client API supports only a
/// single, VM-wide, authentication handler which cannot be configured to handle credentials for several requests. AndroidClientHandler, therefore, implements
/// the authentication in managed .NET code. Message handler supports both Basic and Digest authentication. If an authentication scheme that's not supported
/// by AndroidClientHandler is requested by the server, the application can provide its own authentication module (<see cref="AuthenticationData"/>,
/// <see cref="PreAuthenticationData"/>) to handle the protocol authorization.</para>
/// <para>AndroidClientHandler also supports requests to servers with "invalid" (e.g. self-signed) SSL certificates. Since this process is a bit convoluted using
/// the Java APIs, AndroidClientHandler defines two ways to handle the situation. First, easier, is to store the necessary certificates (either CA or server certificates)
/// in the <see cref="TrustedCerts"/> collection or, after deriving a custom class from AndroidClientHandler, by overriding one or more methods provided for this purpose
/// (<see cref="ConfigureTrustManagerFactory"/>, <see cref="ConfigureKeyManagerFactory"/> and <see cref="ConfigureKeyStore"/>). The former method should be sufficient
/// for most use cases, the latter allows the application to provide fully customized key store, trust manager and key manager, if needed. Note that the instance of
/// AndroidClientHandler configured to accept an "invalid" certificate from the particular server will most likely fail to validate certificates from other servers (even
/// if they use a certificate with a fully validated trust chain) unless you store the CA certificates from your Android system in <see cref="TrustedCerts"/> along with
/// the self-signed certificate(s).</para>
/// </remarks>
public class CustomAndroidClientHandler : HttpClientHandler
{
sealed class RequestRedirectionState
{
public Uri NewUrl;
public int RedirectCounter;
public HttpMethod Method;
}
internal const string LOG_APP = "monodroid-net";
const string GZIP_ENCODING = "gzip";
const string DEFLATE_ENCODING = "deflate";
const string IDENTITY_ENCODING = "identity";
static readonly HashSet<string> known_content_headers = new HashSet<string>(StringComparer.OrdinalIgnoreCase) {
"Allow",
"Content-Disposition",
"Content-Encoding",
"Content-Language",
"Content-Length",
"Content-Location",
"Content-MD5",
"Content-Range",
"Content-Type",
"Expires",
"Last-Modified"
};
static readonly List<IAndroidAuthenticationModule> authModules = new List<IAndroidAuthenticationModule> {
new AuthModuleBasic (),
// COMMENTED OUT: Kyle
//new AuthModuleDigest ()
};
bool disposed;
// Now all hail Java developers! Get this... HttpURLClient defaults to accepting AND
// uncompressing the gzip content encoding UNLESS you set the Accept-Encoding header to ANY
// value. So if we set it to 'gzip' below we WILL get gzipped stream but HttpURLClient will NOT
// uncompress it any longer, doh. And they don't support 'deflate' so we need to handle it ourselves.
bool decompress_here;
/// <summary>
/// <para>
/// Gets or sets the pre authentication data for the request. This property must be set by the application
/// before the request is made. Generally the value can be taken from <see cref="RequestedAuthentication"/>
/// after the initial request, without any authentication data, receives the authorization request from the
/// server. The application must then store credentials in instance of <see cref="AuthenticationData"/> and
/// assign the instance to this propery before retrying the request.
/// </para>
/// <para>
/// The property is never set by AndroidClientHandler.
/// </para>
/// </summary>
/// <value>The pre authentication data.</value>
public AuthenticationData PreAuthenticationData { get; set; }
/// <summary>
/// If the website requires authentication, this property will contain data about each scheme supported
/// by the server after the response. Note that unauthorized request will return a valid response - you
/// need to check the status code and and (re)configure AndroidClientHandler instance accordingly by providing
/// both the credentials and the authentication scheme by setting the <see cref="PreAuthenticationData"/>
/// property. If AndroidClientHandler is not able to detect the kind of authentication scheme it will store an
/// instance of <see cref="AuthenticationData"/> with its <see cref="AuthenticationData.Scheme"/> property
/// set to <c>AuthenticationScheme.Unsupported</c> and the application will be responsible for providing an
/// instance of <see cref="IAndroidAuthenticationModule"/> which handles this kind of authorization scheme
/// (<see cref="AuthenticationData.AuthModule"/>
/// </summary>
public IList<AuthenticationData> RequestedAuthentication { get; private set; }
/// <summary>
/// Server authentication response indicates that the request to authorize comes from a proxy if this property is <c>true</c>.
/// All the instances of <see cref="AuthenticationData"/> stored in the <see cref="RequestedAuthentication"/> property will
/// have their <see cref="AuthenticationData.UseProxyAuthentication"/> preset to the same value as this property.
/// </summary>
public bool ProxyAuthenticationRequested { get; private set; }
/// <summary>
/// If <c>true</c> then the server requested authorization and the application must use information
/// found in <see cref="RequestedAuthentication"/> to set the value of <see cref="PreAuthenticationData"/>
/// </summary>
public bool RequestNeedsAuthorization
{
get { return RequestedAuthentication?.Count > 0; }
}
/// <summary>
/// <para>
/// If the request is to the server protected with a self-signed (or otherwise untrusted) SSL certificate, the request will
/// fail security chain verification unless the application provides either the CA certificate of the entity which issued the
/// server's certificate or, alternatively, provides the server public key. Whichever the case, the certificate(s) must be stored
/// in this property in order for AndroidClientHandler to configure the request to accept the server certificate.</para>
/// <para>AndroidClientHandler uses a custom <see cref="KeyStore"/> and <see cref="TrustManagerFactory"/> to configure the connection.
/// If, however, the application requires finer control over the SSL configuration (e.g. it implements its own TrustManager) then
/// it should leave this property empty and instead derive a custom class from AndroidClientHandler and override, as needed, the
/// <see cref="ConfigureTrustManagerFactory"/>, <see cref="ConfigureKeyManagerFactory"/> and <see cref="ConfigureKeyStore"/> methods
/// instead</para>
/// </summary>
/// <value>The trusted certs.</value>
public IList<Certificate> TrustedCerts { get; set; }
protected override void Dispose(bool disposing)
{
disposed = true;
base.Dispose(disposing);
}
protected void AssertSelf()
{
if(!disposed)
return;
throw new ObjectDisposedException(nameof(AndroidClientHandler));
}
string EncodeUrl(Uri url)
{
if(url == null)
return String.Empty;
if(String.IsNullOrEmpty(url.Query))
return Uri.EscapeUriString(url.ToString());
// UriBuilder takes care of encoding everything properly
var bldr = new UriBuilder(url);
if(url.IsDefaultPort)
bldr.Port = -1; // Avoids adding :80 or :443 to the host name in the result
// bldr.Uri.ToString () would ruin the good job UriBuilder did
return bldr.ToString();
}
/// <summary>
/// Creates, configures and processes an asynchronous request to the indicated resource.
/// </summary>
/// <returns>Task in which the request is executed</returns>
/// <param name="request">Request provided by <see cref="System.Net.Http.HttpClient"/></param>
/// <param name="cancellationToken">Cancellation token.</param>
protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
AssertSelf();
if(request == null)
throw new ArgumentNullException(nameof(request));
if(!request.RequestUri.IsAbsoluteUri)
throw new ArgumentException("Must represent an absolute URI", "request");
var redirectState = new RequestRedirectionState
{
NewUrl = request.RequestUri,
RedirectCounter = 0,
Method = request.Method
};
while(true)
{
URL java_url = new URL(EncodeUrl(redirectState.NewUrl));
URLConnection java_connection = java_url.OpenConnection();
HttpURLConnection httpConnection = await SetupRequestInternal(request, java_connection);
HttpResponseMessage response = await ProcessRequest(request, java_url, httpConnection, cancellationToken, redirectState);
if(response != null)
return response;
if(redirectState.NewUrl == null)
throw new InvalidOperationException("Request redirected but no new URI specified");
request.Method = redirectState.Method;
}
}
Task<HttpResponseMessage> ProcessRequest(HttpRequestMessage request, URL javaUrl, HttpURLConnection httpConnection, CancellationToken cancellationToken, RequestRedirectionState redirectState)
{
cancellationToken.ThrowIfCancellationRequested();
httpConnection.InstanceFollowRedirects = false; // We handle it ourselves
RequestedAuthentication = null;
ProxyAuthenticationRequested = false;
return DoProcessRequest(request, javaUrl, httpConnection, cancellationToken, redirectState);
}
async Task<HttpResponseMessage> DoProcessRequest(HttpRequestMessage request, URL javaUrl, HttpURLConnection httpConnection, CancellationToken cancellationToken, RequestRedirectionState redirectState)
{
if(cancellationToken.IsCancellationRequested)
{
cancellationToken.ThrowIfCancellationRequested();
}
try
{
await Task.WhenAny(
httpConnection.ConnectAsync(),
Task.Run(() => { cancellationToken.WaitHandle.WaitOne(); }))
.ConfigureAwait(false);
}
catch(Java.Net.ConnectException ex)
{
// Wrap it nicely in a "standard" exception so that it's compatible with HttpClientHandler
throw new WebException(ex.Message, ex, WebExceptionStatus.ConnectFailure, null);
}
if(cancellationToken.IsCancellationRequested)
{
httpConnection.Disconnect();
cancellationToken.ThrowIfCancellationRequested();
}
cancellationToken.Register(httpConnection.Disconnect);
if(httpConnection.DoOutput)
{
using(var stream = await request.Content.ReadAsStreamAsync())
{
await stream.CopyToAsync(httpConnection.OutputStream, 4096, cancellationToken)
.ConfigureAwait(false);
}
}
if(cancellationToken.IsCancellationRequested)
{
httpConnection.Disconnect();
cancellationToken.ThrowIfCancellationRequested();
}
var statusCode = await Task.Run(() => (HttpStatusCode)httpConnection.ResponseCode).ConfigureAwait(false);
var connectionUri = new Uri(httpConnection.URL.ToString());
// If the request was redirected we need to put the new URL in the request
request.RequestUri = connectionUri;
var ret = new AndroidHttpResponseMessage(javaUrl, httpConnection)
{
RequestMessage = request,
ReasonPhrase = httpConnection.ResponseMessage,
StatusCode = statusCode,
};
bool disposeRet;
if(HandleRedirect(statusCode, httpConnection, redirectState, out disposeRet))
{
if(disposeRet)
{
ret.Dispose();
ret = null;
}
return ret;
}
switch(statusCode)
{
case HttpStatusCode.Unauthorized:
case HttpStatusCode.ProxyAuthenticationRequired:
// We don't resend the request since that would require new set of credentials if the
// ones provided in Credentials are invalid (or null) and that, in turn, may require asking the
// user which is not something that should be taken care of by us and in this
// context. The application should be responsible for this.
// HttpClientHandler throws an exception in this instance, but I think it's not a good
// idea. We'll return the response message with all the information required by the
// application to fill in the blanks and provide the requested credentials instead.
//
// We return the body of the response too, but the Java client will throw
// a FileNotFound exception if we attempt to access the input stream.
// Instead we try to read the error stream and return an default message if the error stream isn't readable.
ret.Content = GetErrorContent(httpConnection, new StringContent("Unauthorized", Encoding.ASCII));
CopyHeaders(httpConnection, ret);
if(ret.Headers.WwwAuthenticate != null)
{
ProxyAuthenticationRequested = false;
CollectAuthInfo(ret.Headers.WwwAuthenticate);
}
else if(ret.Headers.ProxyAuthenticate != null)
{
ProxyAuthenticationRequested = true;
CollectAuthInfo(ret.Headers.ProxyAuthenticate);
}
// COMMENTED OUT: Kyle
//ret.RequestedAuthentication = RequestedAuthentication;
return ret;
}
if(!IsErrorStatusCode(statusCode))
{
ret.Content = GetContent(httpConnection, httpConnection.InputStream);
}
else
{
// For 400 >= response code <= 599 the Java client throws the FileNotFound exception when attempting to read from the input stream.
// Instead we try to read the error stream and return an empty string if the error stream isn't readable.
ret.Content = GetErrorContent(httpConnection, new StringContent(String.Empty, Encoding.ASCII));
}
CopyHeaders(httpConnection, ret);
IEnumerable<string> cookieHeaderValue;
if(!UseCookies || CookieContainer == null || !ret.Headers.TryGetValues("Set-Cookie", out cookieHeaderValue) || cookieHeaderValue == null)
{
return ret;
}
try
{
CookieContainer.SetCookies(connectionUri, String.Join(",", cookieHeaderValue));
}
catch(Exception ex)
{
// We don't want to terminate the response because of a bad cookie, hence just reporting
// the issue. We might consider adding a virtual method to let the user handle the
// issue, but not sure if it's really needed. Set-Cookie header will be part of the
// header collection so the user can always examine it if they spot an error.
}
return ret;
}
HttpContent GetErrorContent(HttpURLConnection httpConnection, HttpContent fallbackContent)
{
var contentStream = httpConnection.ErrorStream;
if(contentStream != null)
{
return GetContent(httpConnection, contentStream);
}
return fallbackContent;
}
HttpContent GetContent(URLConnection httpConnection, Stream contentStream)
{
Stream inputStream = new BufferedStream(contentStream);
if(decompress_here)
{
string[] encodings = httpConnection.ContentEncoding?.Split(',');
if(encodings != null)
{
if(encodings.Contains(GZIP_ENCODING, StringComparer.OrdinalIgnoreCase))
inputStream = new GZipStream(inputStream, CompressionMode.Decompress);
else if(encodings.Contains(DEFLATE_ENCODING, StringComparer.OrdinalIgnoreCase))
inputStream = new DeflateStream(inputStream, CompressionMode.Decompress);
}
}
return new StreamContent(inputStream);
}
bool HandleRedirect(HttpStatusCode redirectCode, HttpURLConnection httpConnection, RequestRedirectionState redirectState, out bool disposeRet)
{
if(!AllowAutoRedirect)
{
disposeRet = false;
return true; // We shouldn't follow and there's no data to fetch, just return
}
disposeRet = true;
redirectState.NewUrl = null;
switch(redirectCode)
{
case HttpStatusCode.MultipleChoices: // 300
break;
case HttpStatusCode.Moved: // 301
case HttpStatusCode.Redirect: // 302
case HttpStatusCode.SeeOther: // 303
redirectState.Method = HttpMethod.Get;
break;
case HttpStatusCode.TemporaryRedirect: // 307
break;
default:
if((int)redirectCode >= 300 && (int)redirectCode < 400)
throw new InvalidOperationException($"HTTP Redirection status code {redirectCode} ({(int)redirectCode}) not supported");
return false;
}
IDictionary<string, IList<string>> headers = httpConnection.HeaderFields;
IList<string> locationHeader;
if(!headers.TryGetValue("Location", out locationHeader) || locationHeader == null || locationHeader.Count == 0)
throw new InvalidOperationException($"HTTP connection redirected with code {redirectCode} ({(int)redirectCode}) but no Location header found in response");
redirectState.RedirectCounter++;
if(redirectState.RedirectCounter >= MaxAutomaticRedirections)
throw new WebException($"Maximum automatic redirections exceeded (allowed {MaxAutomaticRedirections}, redirected {redirectState.RedirectCounter} times)");
Uri location = new Uri(locationHeader[0], UriKind.Absolute);
redirectState.NewUrl = location;
return true;
}
bool IsErrorStatusCode(HttpStatusCode statusCode)
{
return (int)statusCode >= 400 && (int)statusCode <= 599;
}
void CollectAuthInfo(HttpHeaderValueCollection<AuthenticationHeaderValue> headers)
{
var authData = new List<AuthenticationData>(headers.Count);
foreach(AuthenticationHeaderValue ahv in headers)
{
var data = new AuthenticationData
{
Scheme = GetAuthScheme(ahv.Scheme),
// COMMENTED OUT: Kyle
//Challenge = $"{ahv.Scheme} {ahv.Parameter}",
UseProxyAuthentication = ProxyAuthenticationRequested
};
authData.Add(data);
}
RequestedAuthentication = authData.AsReadOnly();
}
AuthenticationScheme GetAuthScheme(string scheme)
{
if(String.Compare("basic", scheme, StringComparison.OrdinalIgnoreCase) == 0)
return AuthenticationScheme.Basic;
if(String.Compare("digest", scheme, StringComparison.OrdinalIgnoreCase) == 0)
return AuthenticationScheme.Digest;
return AuthenticationScheme.Unsupported;
}
void CopyHeaders(HttpURLConnection httpConnection, HttpResponseMessage response)
{
IDictionary<string, IList<string>> headers = httpConnection.HeaderFields;
foreach(string key in headers.Keys)
{
if(key == null) // First header entry has null key, it corresponds to the response message
continue;
HttpHeaders item_headers;
string kind;
if(known_content_headers.Contains(key))
{
kind = "content";
item_headers = response.Content.Headers;
}
else
{
kind = "response";
item_headers = response.Headers;
}
item_headers.TryAddWithoutValidation(key, headers[key]);
}
}
/// <summary>
/// Configure the <see cref="HttpURLConnection"/> before the request is sent. This method is meant to be overriden
/// by applications which need to perform some extra configuration steps on the connection. It is called with all
/// the request headers set, pre-authentication performed (if applicable) but before the request body is set
/// (e.g. for POST requests). The default implementation in AndroidClientHandler does nothing.
/// </summary>
/// <param name="request">Request data</param>
/// <param name="conn">Pre-configured connection instance</param>
protected virtual Task SetupRequest(HttpRequestMessage request, HttpURLConnection conn)
{
return Task.Factory.StartNew(AssertSelf);
}
/// <summary>
/// Configures the key store. The <paramref name="keyStore"/> parameter is set to instance of <see cref="KeyStore"/>
/// created using the <see cref="KeyStore.DefaultType"/> type and with populated with certificates provided in the <see cref="TrustedCerts"/>
/// property. AndroidClientHandler implementation simply returns the instance passed in the <paramref name="keyStore"/> parameter
/// </summary>
/// <returns>The key store.</returns>
/// <param name="keyStore">Key store to configure.</param>
protected virtual KeyStore ConfigureKeyStore(KeyStore keyStore)
{
AssertSelf();
return keyStore;
}
/// <summary>
/// Create and configure an instance of <see cref="KeyManagerFactory"/>. The <paramref name="keyStore"/> parameter is set to the
/// return value of the <see cref="ConfigureKeyStore"/> method, so it might be null if the application overrode the method and provided
/// no key store. It will not be <c>null</c> when the default implementation is used. The application can return <c>null</c> here since
/// KeyManagerFactory is not required for the custom SSL configuration, but it might be used by the application to implement a more advanced
/// mechanism of key management.
/// </summary>
/// <returns>The key manager factory or <c>null</c>.</returns>
/// <param name="keyStore">Key store.</param>
protected virtual KeyManagerFactory ConfigureKeyManagerFactory(KeyStore keyStore)
{
AssertSelf();
return null;
}
/// <summary>
/// Create and configure an instance of <see cref="TrustManagerFactory"/>. The <paramref name="keyStore"/> parameter is set to the
/// return value of the <see cref="ConfigureKeyStore"/> method, so it might be null if the application overrode the method and provided
/// no key store. It will not be <c>null</c> when the default implementation is used. The application can return <c>null</c> from this
/// method in which case AndroidClientHandler will create its own instance of the trust manager factory provided that the <see cref="TrustCerts"/>
/// list contains at least one valid certificate. If there are no valid certificates and this method returns <c>null</c>, no custom
/// trust manager will be created since that would make all the HTTPS requests fail.
/// </summary>
/// <returns>The trust manager factory.</returns>
/// <param name="keyStore">Key store.</param>
protected virtual TrustManagerFactory ConfigureTrustManagerFactory(KeyStore keyStore)
{
AssertSelf();
return null;
}
void AppendEncoding(string encoding, ref List<string> list)
{
if(list == null)
list = new List<string>();
if(list.Contains(encoding))
return;
list.Add(encoding);
}
async Task<HttpURLConnection> SetupRequestInternal(HttpRequestMessage request, URLConnection conn)
{
if(conn == null)
throw new ArgumentNullException(nameof(conn));
var httpConnection = conn.JavaCast<HttpURLConnection>();
if(httpConnection == null)
throw new InvalidOperationException($"Unsupported URL scheme {conn.URL.Protocol}");
httpConnection.RequestMethod = request.Method.ToString();
// SSL context must be set up as soon as possible, before adding any content or
// headers. Otherwise Java won't use the socket factory
SetupSSL(httpConnection as HttpsURLConnection);
if(request.Content != null)
AddHeaders(httpConnection, request.Content.Headers);
AddHeaders(httpConnection, request.Headers);
List<string> accept_encoding = null;
decompress_here = false;
if((AutomaticDecompression & DecompressionMethods.GZip) != 0)
{
AppendEncoding(GZIP_ENCODING, ref accept_encoding);
decompress_here = true;
}
if((AutomaticDecompression & DecompressionMethods.Deflate) != 0)
{
AppendEncoding(DEFLATE_ENCODING, ref accept_encoding);
decompress_here = true;
}
if(AutomaticDecompression == DecompressionMethods.None)
{
accept_encoding?.Clear();
AppendEncoding(IDENTITY_ENCODING, ref accept_encoding); // Turns off compression for the Java client
}
if(accept_encoding?.Count > 0)
httpConnection.SetRequestProperty("Accept-Encoding", String.Join(",", accept_encoding));
if(UseCookies && CookieContainer != null)
{
string cookieHeaderValue = CookieContainer.GetCookieHeader(request.RequestUri);
if(!String.IsNullOrEmpty(cookieHeaderValue))
httpConnection.SetRequestProperty("Cookie", cookieHeaderValue);
}
HandlePreAuthentication(httpConnection);
await SetupRequest(request, httpConnection);
SetupRequestBody(httpConnection, request);
return httpConnection;
}
void SetupSSL(HttpsURLConnection httpsConnection)
{
if(httpsConnection == null)
return;
KeyStore keyStore = KeyStore.GetInstance(KeyStore.DefaultType);
keyStore.Load(null, null);
bool gotCerts = TrustedCerts?.Count > 0;
if(gotCerts)
{
for(int i = 0; i < TrustedCerts.Count; i++)
{
Certificate cert = TrustedCerts[i];
if(cert == null)
continue;
keyStore.SetCertificateEntry($"ca{i}", cert);
}
}
keyStore = ConfigureKeyStore(keyStore);
KeyManagerFactory kmf = ConfigureKeyManagerFactory(keyStore);
TrustManagerFactory tmf = ConfigureTrustManagerFactory(keyStore);
if(tmf == null)
{
// If there are no certs and no trust manager factory, we can't use a custom manager
// because it will cause all the HTTPS requests to fail because of unverified trust
// chain
if(!gotCerts)
return;
tmf = TrustManagerFactory.GetInstance(TrustManagerFactory.DefaultAlgorithm);
tmf.Init(keyStore);
}
SSLContext context = SSLContext.GetInstance("TLS");
context.Init(kmf?.GetKeyManagers(), tmf.GetTrustManagers(), null);
httpsConnection.SSLSocketFactory = context.SocketFactory;
}
void HandlePreAuthentication(HttpURLConnection httpConnection)
{
AuthenticationData data = PreAuthenticationData;
if(!PreAuthenticate || data == null)
return;
ICredentials creds = data.UseProxyAuthentication ? Proxy?.Credentials : Credentials;
if(creds == null)
{
return;
}
IAndroidAuthenticationModule auth = data.Scheme == AuthenticationScheme.Unsupported ? data.AuthModule : authModules.Find(m => m?.Scheme == data.Scheme);
if(auth == null)
{
return;
}
Authorization authorization = auth.Authenticate(data.Challenge, httpConnection, creds);
if(authorization == null)
{
return;
}
httpConnection.SetRequestProperty(data.UseProxyAuthentication ? "Proxy-Authorization" : "Authorization", authorization.Message);
}
void AddHeaders(HttpURLConnection conn, HttpHeaders headers)
{
if(headers == null)
return;
foreach(KeyValuePair<string, IEnumerable<string>> header in headers)
{
conn.SetRequestProperty(header.Key, header.Value != null ? String.Join(",", header.Value) : String.Empty);
}
}
void SetupRequestBody(HttpURLConnection httpConnection, HttpRequestMessage request)
{
if(request.Content == null)
{
// Pilfered from System.Net.Http.HttpClientHandler:SendAync
if(HttpMethod.Post.Equals(request.Method) || HttpMethod.Put.Equals(request.Method) || HttpMethod.Delete.Equals(request.Method))
{
// Explicitly set this to make sure we're sending a "Content-Length: 0" header.
// This fixes the issue that's been reported on the forums:
// http://forums.xamarin.com/discussion/17770/length-required-error-in-http-post-since-latest-release
httpConnection.SetRequestProperty("Content-Length", "0");
}
return;
}
httpConnection.DoOutput = true;
long? contentLength = request.Content.Headers.ContentLength;
if(contentLength != null)
httpConnection.SetFixedLengthStreamingMode((int)contentLength);
else
httpConnection.SetChunkedStreamingMode(0);
}
}
sealed class AuthModuleBasic : IAndroidAuthenticationModule
{
public AuthenticationScheme Scheme { get; } = AuthenticationScheme.Basic;
public string AuthenticationType { get; } = "Basic";
public bool CanPreAuthenticate { get; } = true;
public Authorization Authenticate(string challenge, HttpURLConnection request, ICredentials credentials)
{
string header = challenge?.Trim();
if(credentials == null || String.IsNullOrEmpty(header))
return null;
if(header.IndexOf("basic", StringComparison.OrdinalIgnoreCase) == -1)
return null;
return InternalAuthenticate(request, credentials);
}
public Authorization PreAuthenticate(HttpURLConnection request, ICredentials credentials)
{
return InternalAuthenticate(request, credentials);
}
Authorization InternalAuthenticate(HttpURLConnection request, ICredentials credentials)
{
if(request == null || credentials == null)
return null;
NetworkCredential cred = credentials.GetCredential(new Uri(request.URL.ToString()), AuthenticationType.ToLowerInvariant());
if(cred == null)
return null;
if(String.IsNullOrEmpty(cred.UserName))
return null;
string domain = cred.Domain?.Trim();
string response = String.Empty;
// If domain is set, MS sends "domain\user:password".
if(!String.IsNullOrEmpty(domain))
response = domain + "\\";
response += cred.UserName + ":" + cred.Password;
return new Authorization($"{AuthenticationType} {Convert.ToBase64String(Encoding.ASCII.GetBytes(response))}");
}
}
}

2
src/Android/Services/HttpService.cs
View File

@ -7,6 +7,6 @@ namespace Bit.Android.Services
{
public class HttpService : IHttpService
{
public ApiHttpClient Client => new ApiHttpClient(new CustomAndroidClientHandler());
public ApiHttpClient Client => new ApiHttpClient(new AndroidClientHandler());
}
}