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// Copyright (c) 2010 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 "base/crypto/pbkdf2.h"
#include <nss.h>
#include <pk11pub.h>
#include "base/crypto/scoped_nss_types.h"
#include "base/nss_util.h"
namespace base {
SymmetricKey* DeriveKeyFromPassword(const std::string& password,
const std::string& salt,
unsigned int iterations,
unsigned int key_size) {
EnsureNSSInit();
if (salt.empty() || iterations == 0 || key_size == 0)
return NULL;
SECItem password_item;
password_item.type = siBuffer;
password_item.data = reinterpret_cast<unsigned char*>(
const_cast<char *>(password.data()));
password_item.len = password.size();
SECItem salt_item;
salt_item.type = siBuffer;
salt_item.data = reinterpret_cast<unsigned char*>(
const_cast<char *>(salt.data()));
salt_item.len = salt.size();
ScopedSECAlgorithmID alg_id(PK11_CreatePBEV2AlgorithmID(SEC_OID_PKCS5_PBKDF2,
SEC_OID_PKCS5_PBKDF2,
SEC_OID_HMAC_SHA1,
key_size,
iterations,
&salt_item));
if (!alg_id.get())
return NULL;
ScopedPK11Slot slot(PK11_GetBestSlot(SEC_OID_PKCS5_PBKDF2, NULL));
if (!slot.get())
return NULL;
PK11SymKey* sym_key = PK11_PBEKeyGen(slot.get(), alg_id.get(), &password_item,
PR_FALSE, NULL);
if (!sym_key)
return NULL;
return new SymmetricKey(sym_key);
}
} // namespace base
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