src/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/callback_helpers.h"
  13 #include "base/compiler_specific.h"
  14 #include "base/logging.h"
  15 #include "chrome/browser/ssl/ssl_client_certificate_selector.h"
  16 #include "content/public/browser/browser_thread.h"
  17 #include "jni/SSLClientCertificateRequest_jni.h"
  18 #include "net/android/keystore_openssl.h"
  19 #include "net/base/host_port_pair.h"
  20 #include "net/cert/cert_database.h"
  21 #include "net/cert/x509_certificate.h"
  22 #include "net/ssl/openssl_client_key_store.h"
  23 #include "net/ssl/ssl_cert_request_info.h"
  24 #include "net/ssl/ssl_client_cert_type.h"
  25
  26
  27 namespace chrome {
  28
  29 namespace {
  30
  31 typedef net::OpenSSLClientKeyStore::ScopedEVP_PKEY ScopedEVP_PKEY;
  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     ScopedEVP_PKEY private_key) {
  38   DCHECK(content::BrowserThread::CurrentlyOn(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     const chrome::SelectCertificateCallback& callback) {
  46   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  47
  48   // Ensure that callback(NULL) is posted as a task on the UI thread
  49   // in case of an error.
  50   base::Closure post_task_closure = base::Bind(
  51       base::IgnoreResult(&content::BrowserThread::PostTask),
  52       content::BrowserThread::UI,
  53       FROM_HERE,
  54       base::Bind(callback, scoped_refptr<net::X509Certificate>()));
  55
  56   base::ScopedClosureRunner guard(post_task_closure);
  57
  58   // Build the |key_types| JNI parameter, as a String[]
  59   std::vector<std::string> key_types;
  60   for (size_t n = 0; n < cert_request_info->cert_key_types.size(); ++n) {
  61     switch (cert_request_info->cert_key_types[n]) {
  62       case net::CLIENT_CERT_RSA_SIGN:
  63         key_types.push_back("RSA");
  64         break;
  65       case net::CLIENT_CERT_DSS_SIGN:
  66         key_types.push_back("DSA");
  67         break;
  68       case net::CLIENT_CERT_ECDSA_SIGN:
  69         key_types.push_back("ECDSA");
  70         break;
  71       default:
  72         // Ignore unknown types.
  73         break;
  74     }
  75   }
  76
  77   JNIEnv* env = base::android::AttachCurrentThread();
  78   ScopedJavaLocalRef<jobjectArray> key_types_ref =
  79       base::android::ToJavaArrayOfStrings(env, key_types);
  80   if (key_types_ref.is_null()) {
  81     LOG(ERROR) << "Could not create key types array (String[])";
  82     return;
  83   }
  84
  85   // Build the |encoded_principals| JNI parameter, as a byte[][]
  86   ScopedJavaLocalRef<jobjectArray> principals_ref =
  87       base::android::ToJavaArrayOfByteArray(
  88           env, cert_request_info->cert_authorities);
  89   if (principals_ref.is_null()) {
  90     LOG(ERROR) << "Could not create principals array (byte[][])";
  91     return;
  92   }
  93
  94   // Build the |host_name| and |port| JNI parameters, as a String and
  95   // a jint.
  96   ScopedJavaLocalRef<jstring> host_name_ref =
  97       base::android::ConvertUTF8ToJavaString(
  98           env, cert_request_info->host_and_port.host());
  99
 100   // Create a copy of the callback on the heap so that its address
 101   // and ownership can be passed through and returned from Java via JNI.
 102   scoped_ptr<chrome::SelectCertificateCallback> request(
 103       new chrome::SelectCertificateCallback(callback));
 104
 105   jint request_id = reinterpret_cast<jint>(request.get());
 106
 107   if (!chrome::android::
 108       Java_SSLClientCertificateRequest_selectClientCertificate(
 109           env, request_id, key_types_ref.obj(), principals_ref.obj(),
 110           host_name_ref.obj(), cert_request_info->host_and_port.port())) {
 111     return;
 112   }
 113
 114   ignore_result(guard.Release());
 115
 116   // Ownership was transferred to Java.
 117   chrome::SelectCertificateCallback* ALLOW_UNUSED dummy =
 118       request.release();
 119 }
 120
 121 }  // namespace
 122
 123 namespace android {
 124
 125 // Called from JNI on request completion/result.
 126 // |env| is the current thread's JNIEnv.
 127 // |clazz| is the SSLClientCertificateRequest JNI class reference.
 128 // |request_id| is the id passed to
 129 // Java_SSLClientCertificateRequest_selectClientCertificate() in Start().
 130 // |encoded_chain_ref| is a JNI reference to a Java array of byte arrays,
 131 // each item holding a DER-encoded X.509 certificate.
 132 // |private_key_ref| is the platform PrivateKey object JNI reference for
 133 // the client certificate.
 134 // Note: both |encoded_chain_ref| and |private_key_ref| will be NULL if
 135 // the user didn't select a certificate.
 136 static void OnSystemRequestCompletion(
 137     JNIEnv* env,
 138     jclass clazz,
 139     jint request_id,
 140     jobjectArray encoded_chain_ref,
 141     jobject private_key_ref) {
 142   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 143
 144   // Take back ownership of the request object.
 145   scoped_ptr<chrome::SelectCertificateCallback> callback(
 146       reinterpret_cast<chrome::SelectCertificateCallback*>(request_id));
 147
 148   // Ensure that callback(NULL) is called in case of an error.
 149   base::Closure null_closure =
 150       base::Bind(*callback, scoped_refptr<net::X509Certificate>());
 151
 152   base::ScopedClosureRunner guard(null_closure);
 153
 154   if (encoded_chain_ref == NULL || private_key_ref == NULL) {
 155     LOG(ERROR) << "Client certificate request cancelled";
 156     return;
 157   }
 158
 159   // Convert the encoded chain to a vector of strings.
 160   std::vector<std::string> encoded_chain_strings;
 161   if (encoded_chain_ref) {
 162     base::android::JavaArrayOfByteArrayToStringVector(
 163         env, encoded_chain_ref, &encoded_chain_strings);
 164   }
 165
 166   std::vector<base::StringPiece> encoded_chain;
 167   for (size_t n = 0; n < encoded_chain_strings.size(); ++n)
 168     encoded_chain.push_back(encoded_chain_strings[n]);
 169
 170   // Create the X509Certificate object from the encoded chain.
 171   scoped_refptr<net::X509Certificate> client_cert(
 172       net::X509Certificate::CreateFromDERCertChain(encoded_chain));
 173   if (!client_cert.get()) {
 174     LOG(ERROR) << "Could not decode client certificate chain";
 175     return;
 176   }
 177
 178   // Create an EVP_PKEY wrapper for the private key JNI reference.
 179   ScopedEVP_PKEY private_key(
 180       net::android::GetOpenSSLPrivateKeyWrapper(private_key_ref));
 181   if (!private_key.get()) {
 182     LOG(ERROR) << "Could not create OpenSSL wrapper for private key";
 183     return;
 184   }
 185
 186   ignore_result(guard.Release());
 187
 188   // RecordClientCertificateKey() must be called on the I/O thread,
 189   // before the callback is called with the selected certificate on
 190   // the UI thread.
 191   content::BrowserThread::PostTaskAndReply(
 192       content::BrowserThread::IO,
 193       FROM_HERE,
 194       base::Bind(&RecordClientCertificateKey,
 195                  client_cert,
 196                  base::Passed(&private_key)),
 197       base::Bind(*callback, client_cert));
 198 }
 199
 200 static void NotifyClientCertificatesChanged() {
 201   net::CertDatabase::GetInstance()->OnAndroidKeyStoreChanged();
 202 }
 203
 204 static void NotifyClientCertificatesChangedOnIOThread(JNIEnv* env, jclass) {
 205   if (content::BrowserThread::CurrentlyOn(content::BrowserThread::IO)) {
 206     NotifyClientCertificatesChanged();
 207   } else {
 208     content::BrowserThread::PostTask(
 209          content::BrowserThread::IO,
 210          FROM_HERE,
 211          base::Bind(&NotifyClientCertificatesChanged));
 212   }
 213 }
 214
 215 bool RegisterSSLClientCertificateRequestAndroid(JNIEnv* env) {
 216   return RegisterNativesImpl(env);
 217 }
 218
 219 }  // namespace android
 220
 221 void ShowSSLClientCertificateSelector(
 222     content::WebContents* contents,
 223     const net::HttpNetworkSession* network_session,
 224     net::SSLCertRequestInfo* cert_request_info,
 225     const chrome::SelectCertificateCallback& callback) {
 226   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 227   StartClientCertificateRequest(cert_request_info, callback);
 228 }
 229
 230 }  // namespace chrome