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// Copyright (c) 2009 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/rsa_private_key.h"
#include <cryptohi.h>
#include <keyhi.h>
#include <pk11pub.h>
#include <iostream>
#include <list>
#include "base/logging.h"
#include "base/nss_init.h"
#include "base/scoped_ptr.h"
#include "base/string_util.h"
// TODO(rafaelw): Consider refactoring common functions and definitions from
// rsa_private_key_win.cc or using NSS's ASN.1 encoder.
namespace {
static bool ReadAttribute(SECKEYPrivateKey* key,
CK_ATTRIBUTE_TYPE type,
std::vector<uint8>* output) {
SECItem item;
SECStatus rv;
rv = PK11_ReadRawAttribute(PK11_TypePrivKey, key, type, &item);
if (rv != SECSuccess) {
NOTREACHED();
return false;
}
output->assign(item.data, item.data + item.len);
SECITEM_FreeItem(&item, PR_FALSE);
return true;
}
} // namespace
namespace base {
// static
RSAPrivateKey* RSAPrivateKey::Create(uint16 num_bits) {
scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey);
PK11SlotInfo *slot = PK11_GetInternalSlot();
if (!slot)
return NULL;
PK11RSAGenParams param;
param.keySizeInBits = num_bits;
param.pe = 65537L;
result->key_ = PK11_GenerateKeyPair(slot, CKM_RSA_PKCS_KEY_PAIR_GEN, ¶m,
&result->public_key_, PR_FALSE, PR_FALSE, NULL);
PK11_FreeSlot(slot);
if (!result->key_)
return NULL;
return result.release();
}
// static
RSAPrivateKey* RSAPrivateKey::CreateFromPrivateKeyInfo(
const std::vector<uint8>& input) {
scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey);
PK11SlotInfo *slot = PK11_GetInternalSlot();
if (!slot)
return NULL;
SECItem der_private_key_info;
der_private_key_info.data = const_cast<unsigned char*>(&input.front());
der_private_key_info.len = input.size();
SECStatus rv = PK11_ImportDERPrivateKeyInfoAndReturnKey(slot,
&der_private_key_info, NULL, NULL, PR_FALSE, PR_FALSE,
KU_DIGITAL_SIGNATURE, &result->key_, NULL);
PK11_FreeSlot(slot);
if (rv != SECSuccess) {
NOTREACHED();
return NULL;
}
result->public_key_ = SECKEY_ConvertToPublicKey(result->key_);
if (!result->public_key_) {
NOTREACHED();
return NULL;
}
return result.release();
}
RSAPrivateKey::RSAPrivateKey() : key_(NULL), public_key_(NULL) {
EnsureNSSInit();
}
RSAPrivateKey::~RSAPrivateKey() {
if (key_)
SECKEY_DestroyPrivateKey(key_);
if (public_key_)
SECKEY_DestroyPublicKey(public_key_);
}
bool RSAPrivateKey::ExportPrivateKey(std::vector<uint8>* output) {
PrivateKeyInfoCodec private_key_info(true);
// Manually read the component attributes of the private key and build up
// the PrivateKeyInfo.
if (!ReadAttribute(key_, CKA_MODULUS, private_key_info.modulus()) ||
!ReadAttribute(key_, CKA_PUBLIC_EXPONENT,
private_key_info.public_exponent()) ||
!ReadAttribute(key_, CKA_PRIVATE_EXPONENT,
private_key_info.private_exponent()) ||
!ReadAttribute(key_, CKA_PRIME_1, private_key_info.prime1()) ||
!ReadAttribute(key_, CKA_PRIME_2, private_key_info.prime2()) ||
!ReadAttribute(key_, CKA_EXPONENT_1, private_key_info.exponent1()) ||
!ReadAttribute(key_, CKA_EXPONENT_2, private_key_info.exponent2()) ||
!ReadAttribute(key_, CKA_COEFFICIENT, private_key_info.coefficient())) {
NOTREACHED();
return false;
}
return private_key_info.Export(output);
}
bool RSAPrivateKey::ExportPublicKey(std::vector<uint8>* output) {
SECItem* der_pubkey = SECKEY_EncodeDERSubjectPublicKeyInfo(public_key_);
if (!der_pubkey) {
NOTREACHED();
return false;
}
for (size_t i = 0; i < der_pubkey->len; ++i)
output->push_back(der_pubkey->data[i]);
SECITEM_FreeItem(der_pubkey, PR_TRUE);
return true;
}
} // namespace base
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