Add PKCS#8 ECPrivateKey export/import functions.

crypto/rsa_private_key.cc

 // Copyright (c) 2011 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 "crypto/rsa_private_key.h"
 
 #include <openssl/bn.h>
 #include <openssl/bytestring.h>
 #include <openssl/evp.h>
 #include <openssl/mem.h>
@@ skipping 69 matching lines @@
   ScopedRSA rsa(EVP_PKEY_get1_RSA(key_));
   if (!rsa)
     return NULL;
   copy->key_ = EVP_PKEY_new();
   if (!EVP_PKEY_set1_RSA(copy->key_, rsa.get()))
     return NULL;
   return copy.release();
 }
 
 bool RSAPrivateKey::ExportPrivateKey(std::vector<uint8_t>* output) const {
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
   uint8_t *der;
   size_t der_len;
   AutoCBB cbb;
   if (!CBB_init(cbb.get(), 0) ||
       !EVP_marshal_private_key(cbb.get(), key_) ||
       !CBB_finish(cbb.get(), &der, &der_len)) {
     return false;
   }
   output->assign(der, der + der_len);
   OPENSSL_free(der);
   return true;
 }
 
 bool RSAPrivateKey::ExportPublicKey(std::vector<uint8_t>* output) const {
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
   uint8_t *der;
   size_t der_len;
   AutoCBB cbb;
   if (!CBB_init(cbb.get(), 0) ||
       !EVP_marshal_public_key(cbb.get(), key_) ||
       !CBB_finish(cbb.get(), &der, &der_len)) {
     return false;
   }
   output->assign(der, der + der_len);
   OPENSSL_free(der);
   return true;
 }
 
 }  // namespace crypto