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      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 "net/android/keystore.h"
      6 
      7 #include <vector>
      8 
      9 #include "base/android/jni_android.h"
     10 #include "base/android/jni_array.h"
     11 #include "base/logging.h"
     12 #include "jni/AndroidKeyStore_jni.h"
     13 #include "net/android/android_private_key.h"
     14 
     15 using base::android::AttachCurrentThread;
     16 using base::android::HasException;
     17 using base::android::JavaByteArrayToByteVector;
     18 using base::android::ScopedJavaLocalRef;
     19 using base::android::ToJavaByteArray;
     20 using base::android::JavaArrayOfByteArrayToStringVector;
     21 
     22 namespace net {
     23 namespace android {
     24 
     25 bool GetRSAKeyModulus(
     26     jobject private_key_ref,
     27     std::vector<uint8>* result) {
     28   JNIEnv* env = AttachCurrentThread();
     29 
     30   ScopedJavaLocalRef<jbyteArray> modulus_ref =
     31       Java_AndroidKeyStore_getRSAKeyModulus(env,
     32                                             GetKeyStore(private_key_ref).obj(),
     33                                             private_key_ref);
     34   if (modulus_ref.is_null())
     35     return false;
     36 
     37   JavaByteArrayToByteVector(env, modulus_ref.obj(), result);
     38   return true;
     39 }
     40 
     41 bool GetDSAKeyParamQ(jobject private_key_ref,
     42                      std::vector<uint8>* result) {
     43   JNIEnv* env = AttachCurrentThread();
     44 
     45   ScopedJavaLocalRef<jbyteArray> q_ref =
     46       Java_AndroidKeyStore_getDSAKeyParamQ(
     47           env,
     48           GetKeyStore(private_key_ref).obj(),
     49           private_key_ref);
     50   if (q_ref.is_null())
     51     return false;
     52 
     53   JavaByteArrayToByteVector(env, q_ref.obj(), result);
     54   return true;
     55 }
     56 
     57 bool GetECKeyOrder(jobject private_key_ref,
     58                    std::vector<uint8>* result) {
     59   JNIEnv* env = AttachCurrentThread();
     60 
     61   ScopedJavaLocalRef<jbyteArray> order_ref =
     62       Java_AndroidKeyStore_getECKeyOrder(
     63           env,
     64           GetKeyStore(private_key_ref).obj(),
     65           private_key_ref);
     66 
     67   if (order_ref.is_null())
     68     return false;
     69 
     70   JavaByteArrayToByteVector(env, order_ref.obj(), result);
     71   return true;
     72 }
     73 
     74 bool GetPrivateKeyEncodedBytes(jobject private_key_ref,
     75                                std::vector<uint8>* result) {
     76   JNIEnv* env = AttachCurrentThread();
     77 
     78   ScopedJavaLocalRef<jbyteArray> encoded_ref =
     79       Java_AndroidKeyStore_getPrivateKeyEncodedBytes(
     80           env,
     81           GetKeyStore(private_key_ref).obj(),
     82           private_key_ref);
     83   if (encoded_ref.is_null())
     84     return false;
     85 
     86   JavaByteArrayToByteVector(env, encoded_ref.obj(), result);
     87   return true;
     88 }
     89 
     90 bool RawSignDigestWithPrivateKey(
     91     jobject private_key_ref,
     92     const base::StringPiece& digest,
     93     std::vector<uint8>* signature) {
     94   JNIEnv* env = AttachCurrentThread();
     95 
     96   // Convert message to byte[] array.
     97   ScopedJavaLocalRef<jbyteArray> digest_ref =
     98       ToJavaByteArray(env,
     99                       reinterpret_cast<const uint8*>(digest.data()),
    100                       digest.length());
    101   DCHECK(!digest_ref.is_null());
    102 
    103   // Invoke platform API
    104   ScopedJavaLocalRef<jbyteArray> signature_ref =
    105       Java_AndroidKeyStore_rawSignDigestWithPrivateKey(
    106           env,
    107           GetKeyStore(private_key_ref).obj(),
    108           private_key_ref,
    109           digest_ref.obj());
    110   if (HasException(env) || signature_ref.is_null())
    111     return false;
    112 
    113   // Write signature to string.
    114   JavaByteArrayToByteVector(env, signature_ref.obj(), signature);
    115   return true;
    116 }
    117 
    118 PrivateKeyType GetPrivateKeyType(jobject private_key_ref) {
    119   JNIEnv* env = AttachCurrentThread();
    120   int type = Java_AndroidKeyStore_getPrivateKeyType(
    121       env,
    122       GetKeyStore(private_key_ref).obj(),
    123       private_key_ref);
    124   return static_cast<PrivateKeyType>(type);
    125 }
    126 
    127 AndroidEVP_PKEY* GetOpenSSLSystemHandleForPrivateKey(jobject private_key_ref) {
    128   JNIEnv* env = AttachCurrentThread();
    129   // Note: the pointer is passed as a jint here because that's how it
    130   // is stored in the Java object. Java doesn't have a primitive type
    131   // like intptr_t that matches the size of pointers on the host
    132   // machine, and Android only runs on 32-bit CPUs.
    133   //
    134   // Given that this routine shall only be called on Android < 4.2,
    135   // this won't be a problem in the far future (e.g. when Android gets
    136   // ported to 64-bit environments, if ever).
    137   long pkey = Java_AndroidKeyStore_getOpenSSLHandleForPrivateKey(
    138       env,
    139       GetKeyStore(private_key_ref).obj(),
    140       private_key_ref);
    141   return reinterpret_cast<AndroidEVP_PKEY*>(pkey);
    142 }
    143 
    144 ScopedJavaLocalRef<jobject> GetOpenSSLEngineForPrivateKey(
    145     jobject private_key_ref) {
    146   JNIEnv* env = AttachCurrentThread();
    147   ScopedJavaLocalRef<jobject> engine =
    148       Java_AndroidKeyStore_getOpenSSLEngineForPrivateKey(
    149           env,
    150           GetKeyStore(private_key_ref).obj(),
    151           private_key_ref);
    152   return engine;
    153 }
    154 
    155 void ReleaseKey(jobject private_key_ref) {
    156   JNIEnv* env = AttachCurrentThread();
    157   Java_AndroidKeyStore_releaseKey(env,
    158                                   GetKeyStore(private_key_ref).obj(),
    159                                   private_key_ref);
    160   env->DeleteGlobalRef(private_key_ref);
    161 }
    162 
    163 bool RegisterKeyStore(JNIEnv* env) {
    164   return RegisterNativesImpl(env);
    165 }
    166 
    167 }  // namespace android
    168 }  // namespace net
    169