Revert "Switch to BoringSSL."

net/quic/crypto/aead_base_decrypter_openssl.cc

 // Copyright (c) 2013 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/quic/crypto/aead_base_decrypter.h"
 
 #include <openssl/err.h>
 #include <openssl/evp.h>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 68 matching lines @@
 bool AeadBaseDecrypter::Decrypt(StringPiece nonce,
                                 StringPiece associated_data,
                                 StringPiece ciphertext,
                                 uint8* output,
                                 size_t* output_length) {
   if (ciphertext.length() < auth_tag_size_ ||
       nonce.size() != nonce_prefix_size_ + sizeof(QuicPacketSequenceNumber)) {
     return false;
   }
 
-  if (!EVP_AEAD_CTX_open(
-      ctx_.get(), output, output_length, ciphertext.size(),
+  ssize_t len = EVP_AEAD_CTX_open(
+      ctx_.get(), output, ciphertext.size(),
       reinterpret_cast<const uint8_t*>(nonce.data()), nonce.size(),
       reinterpret_cast<const uint8_t*>(ciphertext.data()), ciphertext.size(),
       reinterpret_cast<const uint8_t*>(associated_data.data()),
-      associated_data.size())) {
+      associated_data.size());
+
+  if (len < 0) {
     // Because QuicFramer does trial decryption, decryption errors are expected
     // when encryption level changes. So we don't log decryption errors.
     ClearOpenSslErrors();
     return false;
   }
 
+  *output_length = len;
   return true;
 }
 
 QuicData* AeadBaseDecrypter::DecryptPacket(
     QuicPacketSequenceNumber sequence_number,
     StringPiece associated_data,
     StringPiece ciphertext) {
   if (ciphertext.length() < auth_tag_size_) {
     return NULL;
   }
@@ skipping 20 matching lines @@
 
 StringPiece AeadBaseDecrypter::GetNoncePrefix() const {
   if (nonce_prefix_size_ == 0) {
     return StringPiece();
   }
   return StringPiece(reinterpret_cast<const char*>(nonce_prefix_),
                      nonce_prefix_size_);
 }
 
 }  // namespace net