Revert "Switch to BoringSSL."

crypto/encryptor_openssl.cc

Index: crypto/encryptor_openssl.cc
diff --git a/crypto/encryptor_openssl.cc b/crypto/encryptor_openssl.cc
index 0504adbcb9f74d3c8f9506a69671d7cb4dfd871b..0bf96b79df2df6da140a51e9ed73330e077b8273 100644
--- a/crypto/encryptor_openssl.cc
+++ b/crypto/encryptor_openssl.cc
@@ -19,6 +19,7 @@ namespace {
 const EVP_CIPHER* GetCipherForKey(SymmetricKey* key) {
   switch (key->key().length()) {
     case 16: return EVP_aes_128_cbc();
+    case 24: return EVP_aes_192_cbc();
     case 32: return EVP_aes_256_cbc();
     default: return NULL;
   }
@@ -99,8 +100,8 @@ bool Encryptor::Crypt(bool do_encrypt,
   DCHECK(cipher);  // Already handled in Init();
 
   const std::string& key = key_->key();
-  DCHECK_EQ(EVP_CIPHER_iv_length(cipher), iv_.length());
-  DCHECK_EQ(EVP_CIPHER_key_length(cipher), key.length());
+  DCHECK_EQ(EVP_CIPHER_iv_length(cipher), static_cast<int>(iv_.length()));
+  DCHECK_EQ(EVP_CIPHER_key_length(cipher), static_cast<int>(key.length()));
 
   ScopedCipherCTX ctx;
   if (!EVP_CipherInit_ex(ctx.get(), cipher, NULL,