Wire up SSL client authentication for OpenSSL/Android through the net/ stack

net/base/openssl_private_key_store_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/base/openssl_private_key_store.h"
 
 #include <openssl/evp.h>
 #include <openssl/x509.h>
 
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "crypto/openssl_util.h"
 #include "net/android/network_library.h"
 
 namespace net {
 
-namespace {
+bool OpenSSLPrivateKeyStore::StoreKeyPair(const GURL& url,
+                                          EVP_PKEY* pkey) {
+  // Always clear openssl errors on exit.
+  crypto::OpenSSLErrStackTracer err_trace(FROM_HERE);
 
-class OpenSSLKeyStoreAndroid : public OpenSSLPrivateKeyStore {
- public:
-  ~OpenSSLKeyStoreAndroid() {}
+  // Important: Do not use i2d_PublicKey() here, which returns data in
+  // PKCS#1 format, use i2d_PUBKEY() which returns it as DER-encoded
+  // SubjectPublicKeyInfo (X.509), as expected by the platform.
+  unsigned char* public_key = NULL;
+  int public_len = i2d_PUBKEY(pkey, &public_key);
 
-  virtual bool StorePrivateKey(const GURL& url, EVP_PKEY* pkey) {
-    // Always clear openssl errors on exit.
-    crypto::OpenSSLErrStackTracer err_trace(FROM_HERE);
-
-    // Important: Do not use i2d_PublicKey() here, which returns data in
-    // PKCS#1 format, use i2d_PUBKEY() which returns it as DER-encoded
-    // SubjectPublicKeyInfo (X.509), as expected by the platform.
-    unsigned char* public_key = NULL;
-    int public_len = i2d_PUBKEY(pkey, &public_key);
-
-    // Important: Do not use i2d_PrivateKey() here, it returns data
-    // in a format that is incompatible with what the platform expects.
-    unsigned char* private_key = NULL;
-    int private_len = 0;
-    crypto::ScopedOpenSSL<PKCS8_PRIV_KEY_INFO,
-        PKCS8_PRIV_KEY_INFO_free> pkcs8(EVP_PKEY2PKCS8(pkey));
-    if (pkcs8.get() != NULL) {
-      private_len = i2d_PKCS8_PRIV_KEY_INFO(pkcs8.get(), &private_key);
-    }
-    bool ret = false;
-    if (public_len > 0 && private_len > 0) {
-      ret = net::android::StoreKeyPair(
-            static_cast<const uint8*>(public_key), public_len,
-            static_cast<const uint8*>(private_key), private_len);
-    }
-    LOG_IF(ERROR, !ret) << "StorePrivateKey failed. pub len = " << public_len
-                        << " priv len = " << private_len;
-    OPENSSL_free(public_key);
-    OPENSSL_free(private_key);
-    return ret;
+  // Important: Do not use i2d_PrivateKey() here, it returns data
+  // in a format that is incompatible with what the platform expects.
+  unsigned char* private_key = NULL;
+  int private_len = 0;
+  crypto::ScopedOpenSSL<
+      PKCS8_PRIV_KEY_INFO,
+      PKCS8_PRIV_KEY_INFO_free> pkcs8(EVP_PKEY2PKCS8(pkey));
+  if (pkcs8.get() != NULL) {
+    private_len = i2d_PKCS8_PRIV_KEY_INFO(pkcs8.get(), &private_key);
   }
-
-  virtual EVP_PKEY* FetchPrivateKey(EVP_PKEY* pkey) {
-    // TODO(joth): Implement when client authentication is required.
-    NOTIMPLEMENTED();
-    return NULL;
+  bool ret = false;
+  if (public_len > 0 && private_len > 0) {
+    ret = net::android::StoreKeyPair(
+        static_cast<const uint8*>(public_key), public_len,
+        static_cast<const uint8*>(private_key), private_len);
   }
-
-  static OpenSSLKeyStoreAndroid* GetInstance() {
-    // Leak the OpenSSL key store as it is used from a non-joinable worker
-    // thread that may still be running at shutdown.
-    return Singleton<
-        OpenSSLKeyStoreAndroid,
-        OpenSSLKeyStoreAndroidLeakyTraits>::get();
-  }
-
- private:
-  friend struct DefaultSingletonTraits<OpenSSLKeyStoreAndroid>;
-  typedef LeakySingletonTraits<OpenSSLKeyStoreAndroid>
-      OpenSSLKeyStoreAndroidLeakyTraits;
-
-  OpenSSLKeyStoreAndroid() {}
-
-  DISALLOW_COPY_AND_ASSIGN(OpenSSLKeyStoreAndroid);
-};
-
-}  // namespace
-
-OpenSSLPrivateKeyStore* OpenSSLPrivateKeyStore::GetInstance() {
-  return OpenSSLKeyStoreAndroid::GetInstance();
+  LOG_IF(ERROR, !ret) << "StoreKeyPair failed. pub len = " << public_len
+                      << " priv len = " << private_len;
+  OPENSSL_free(public_key);
+  OPENSSL_free(private_key);
+  return ret;
 }
 
 }  // namespace net