chrome/browser/ui/android/ssl_client_certificate_request.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/android/ssl_client_certificate_request.h"
   6
   7 #include "base/android/jni_array.h"
   8 #include "base/android/jni_string.h"
   9 #include "base/android/scoped_java_ref.h"
  10 #include "base/basictypes.h"
  11 #include "base/bind.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/logging.h"
  14 #include "chrome/browser/ssl/ssl_client_certificate_selector.h"
  15 #include "chrome/browser/ui/android/window_android_helper.h"
  16 #include "content/public/browser/browser_thread.h"
  17 #include "content/public/browser/client_certificate_delegate.h"
  18 #include "crypto/scoped_openssl_types.h"
  19 #include "jni/SSLClientCertificateRequest_jni.h"
  20 #include "net/android/keystore_openssl.h"
  21 #include "net/base/host_port_pair.h"
  22 #include "net/cert/cert_database.h"
  23 #include "net/cert/x509_certificate.h"
  24 #include "net/ssl/openssl_client_key_store.h"
  25 #include "net/ssl/ssl_cert_request_info.h"
  26 #include "net/ssl/ssl_client_cert_type.h"
  27 #include "ui/android/window_android.h"
  28
  29 namespace chrome {
  30
  31 namespace {
  32
  33 // Must be called on the I/O thread to record a client certificate
  34 // and its private key in the OpenSSLClientKeyStore.
  35 void RecordClientCertificateKey(
  36     const scoped_refptr<net::X509Certificate>& client_cert,
  37     crypto::ScopedEVP_PKEY private_key) {
  38   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
  39   net::OpenSSLClientKeyStore::GetInstance()->RecordClientCertPrivateKey(
  40       client_cert.get(), private_key.get());
  41 }
  42
  43 void StartClientCertificateRequest(
  44     const net::SSLCertRequestInfo* cert_request_info,
  45     ui::WindowAndroid* window,
  46     scoped_ptr<content::ClientCertificateDelegate> delegate) {
  47   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  48
  49   // Build the |key_types| JNI parameter, as a String[]
  50   std::vector<std::string> key_types;
  51   for (size_t n = 0; n < cert_request_info->cert_key_types.size(); ++n) {
  52     switch (cert_request_info->cert_key_types[n]) {
  53       case net::CLIENT_CERT_RSA_SIGN:
  54         key_types.push_back("RSA");
  55         break;
  56       case net::CLIENT_CERT_DSS_SIGN:
  57         key_types.push_back("DSA");
  58         break;
  59       case net::CLIENT_CERT_ECDSA_SIGN:
  60         key_types.push_back("ECDSA");
  61         break;
  62       default:
  63         // Ignore unknown types.
  64         break;
  65     }
  66   }
  67
  68   JNIEnv* env = base::android::AttachCurrentThread();
  69   ScopedJavaLocalRef<jobjectArray> key_types_ref =
  70       base::android::ToJavaArrayOfStrings(env, key_types);
  71   if (key_types_ref.is_null()) {
  72     LOG(ERROR) << "Could not create key types array (String[])";
  73     return;
  74   }
  75
  76   // Build the |encoded_principals| JNI parameter, as a byte[][]
  77   ScopedJavaLocalRef<jobjectArray> principals_ref =
  78       base::android::ToJavaArrayOfByteArray(
  79           env, cert_request_info->cert_authorities);
  80   if (principals_ref.is_null()) {
  81     LOG(ERROR) << "Could not create principals array (byte[][])";
  82     return;
  83   }
  84
  85   // Build the |host_name| and |port| JNI parameters, as a String and
  86   // a jint.
  87   ScopedJavaLocalRef<jstring> host_name_ref =
  88       base::android::ConvertUTF8ToJavaString(
  89           env, cert_request_info->host_and_port.host());
  90
  91   // Pass the address of the delegate through to Java.
  92   jlong request_id = reinterpret_cast<intptr_t>(delegate.get());
  93
  94   if (!chrome::android::
  95       Java_SSLClientCertificateRequest_selectClientCertificate(
  96           env,
  97           request_id,
  98           window->GetJavaObject().obj(),
  99           key_types_ref.obj(),
 100           principals_ref.obj(),
 101           host_name_ref.obj(),
 102           cert_request_info->host_and_port.port())) {
 103     return;
 104   }
 105
 106   // Ownership was transferred to Java.
 107   ignore_result(delegate.release());
 108 }
 109
 110 }  // namespace
 111
 112 namespace android {
 113
 114 // Called from JNI on request completion/result.
 115 // |env| is the current thread's JNIEnv.
 116 // |clazz| is the SSLClientCertificateRequest JNI class reference.
 117 // |request_id| is the id passed to
 118 // Java_SSLClientCertificateRequest_selectClientCertificate() in Start().
 119 // |encoded_chain_ref| is a JNI reference to a Java array of byte arrays,
 120 // each item holding a DER-encoded X.509 certificate.
 121 // |private_key_ref| is the platform PrivateKey object JNI reference for
 122 // the client certificate.
 123 // Note: both |encoded_chain_ref| and |private_key_ref| will be NULL if
 124 // the user didn't select a certificate.
 125 static void OnSystemRequestCompletion(
 126     JNIEnv* env,
 127     jclass clazz,
 128     jlong request_id,
 129     jobjectArray encoded_chain_ref,
 130     jobject private_key_ref) {
 131   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 132
 133   // Take back ownership of the delegate object.
 134   scoped_ptr<content::ClientCertificateDelegate> delegate(
 135       reinterpret_cast<content::ClientCertificateDelegate*>(request_id));
 136
 137   if (encoded_chain_ref == NULL || private_key_ref == NULL) {
 138     LOG(ERROR) << "No client certificate selected";
 139     delegate->ContinueWithCertificate(nullptr);
 140     return;
 141   }
 142
 143   // Convert the encoded chain to a vector of strings.
 144   std::vector<std::string> encoded_chain_strings;
 145   if (encoded_chain_ref) {
 146     base::android::JavaArrayOfByteArrayToStringVector(
 147         env, encoded_chain_ref, &encoded_chain_strings);
 148   }
 149
 150   std::vector<base::StringPiece> encoded_chain;
 151   for (size_t n = 0; n < encoded_chain_strings.size(); ++n)
 152     encoded_chain.push_back(encoded_chain_strings[n]);
 153
 154   // Create the X509Certificate object from the encoded chain.
 155   scoped_refptr<net::X509Certificate> client_cert(
 156       net::X509Certificate::CreateFromDERCertChain(encoded_chain));
 157   if (!client_cert.get()) {
 158     LOG(ERROR) << "Could not decode client certificate chain";
 159     return;
 160   }
 161
 162   // Create an EVP_PKEY wrapper for the private key JNI reference.
 163   crypto::ScopedEVP_PKEY private_key(
 164       net::android::GetOpenSSLPrivateKeyWrapper(private_key_ref));
 165   if (!private_key.get()) {
 166     LOG(ERROR) << "Could not create OpenSSL wrapper for private key";
 167     return;
 168   }
 169
 170   // RecordClientCertificateKey() must be called on the I/O thread,
 171   // before the callback is called with the selected certificate on
 172   // the UI thread.
 173   content::BrowserThread::PostTaskAndReply(
 174       content::BrowserThread::IO, FROM_HERE,
 175       base::Bind(&RecordClientCertificateKey, client_cert,
 176                  base::Passed(&private_key)),
 177       base::Bind(&content::ClientCertificateDelegate::ContinueWithCertificate,
 178                  base::Owned(delegate.release()), client_cert));
 179 }
 180
 181 static void NotifyClientCertificatesChanged() {
 182   net::CertDatabase::GetInstance()->OnAndroidKeyStoreChanged();
 183 }
 184
 185 static void NotifyClientCertificatesChangedOnIOThread(JNIEnv* env, jclass) {
 186   if (content::BrowserThread::CurrentlyOn(content::BrowserThread::IO)) {
 187     NotifyClientCertificatesChanged();
 188   } else {
 189     content::BrowserThread::PostTask(
 190          content::BrowserThread::IO,
 191          FROM_HERE,
 192          base::Bind(&NotifyClientCertificatesChanged));
 193   }
 194 }
 195
 196 bool RegisterSSLClientCertificateRequestAndroid(JNIEnv* env) {
 197   return RegisterNativesImpl(env);
 198 }
 199
 200 }  // namespace android
 201
 202 void ShowSSLClientCertificateSelector(
 203     content::WebContents* contents,
 204     net::SSLCertRequestInfo* cert_request_info,
 205     scoped_ptr<content::ClientCertificateDelegate> delegate) {
 206   ui::WindowAndroid* window =
 207       WindowAndroidHelper::FromWebContents(contents)->GetWindowAndroid();
 208   DCHECK(window);
 209   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 210   StartClientCertificateRequest(cert_request_info, window, delegate.Pass());
 211 }
 212
 213 }  // namespace chrome