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// 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/bytestring.h>
#include <openssl/bn.h>
#include <openssl/evp.h>
#include <openssl/mem.h>
#include <openssl/rsa.h>
#include <stdint.h>
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "crypto/auto_cbb.h"
#include "crypto/openssl_util.h"
#include "crypto/scoped_openssl_types.h"
namespace crypto {
// static
RSAPrivateKey* RSAPrivateKey::Create(uint16_t num_bits) {
OpenSSLErrStackTracer err_tracer(FROM_HERE);
ScopedRSA rsa_key(RSA_new());
ScopedBIGNUM bn(BN_new());
if (!rsa_key.get() || !bn.get() || !BN_set_word(bn.get(), 65537L))
return NULL;
if (!RSA_generate_key_ex(rsa_key.get(), num_bits, bn.get(), NULL))
return NULL;
scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey);
result->key_ = EVP_PKEY_new();
if (!result->key_ || !EVP_PKEY_set1_RSA(result->key_, rsa_key.get()))
return NULL;
return result.release();
}
// static
RSAPrivateKey* RSAPrivateKey::CreateFromPrivateKeyInfo(
const std::vector<uint8_t>& input) {
OpenSSLErrStackTracer err_tracer(FROM_HERE);
CBS cbs;
CBS_init(&cbs, input.data(), input.size());
ScopedEVP_PKEY pkey(EVP_parse_private_key(&cbs));
if (!pkey || CBS_len(&cbs) != 0 || EVP_PKEY_id(pkey.get()) != EVP_PKEY_RSA)
return nullptr;
scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey);
result->key_ = pkey.release();
return result.release();
}
// static
RSAPrivateKey* RSAPrivateKey::CreateFromKey(EVP_PKEY* key) {
DCHECK(key);
if (EVP_PKEY_type(key->type) != EVP_PKEY_RSA)
return NULL;
RSAPrivateKey* copy = new RSAPrivateKey();
copy->key_ = EVP_PKEY_up_ref(key);
return copy;
}
RSAPrivateKey::RSAPrivateKey()
: key_(NULL) {
}
RSAPrivateKey::~RSAPrivateKey() {
if (key_)
EVP_PKEY_free(key_);
}
RSAPrivateKey* RSAPrivateKey::Copy() const {
scoped_ptr<RSAPrivateKey> copy(new RSAPrivateKey());
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 {
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 {
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
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