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qtbase/src/network/ssl/qsslkey_openssl.cpp

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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qsslkey.h"
#include "qsslkey_p.h"
#include "qsslsocket_openssl_symbols_p.h"
#include "qsslsocket.h"
#include "qsslsocket_p.h"
#include <QtCore/qatomic.h>
#include <QtCore/qbytearray.h>
#include <QtCore/qiodevice.h>
#ifndef QT_NO_DEBUG_STREAM
#include <QtCore/qdebug.h>
#endif
QT_BEGIN_NAMESPACE
void QSslKeyPrivate::clear(bool deep)
{
isNull = true;
if (!QSslSocket::supportsSsl())
return;
if (algorithm == QSsl::Rsa && rsa) {
if (deep)
q_RSA_free(rsa);
rsa = 0;
}
if (algorithm == QSsl::Dsa && dsa) {
if (deep)
q_DSA_free(dsa);
dsa = 0;
}
#ifndef OPENSSL_NO_EC
if (algorithm == QSsl::Ec && ec) {
if (deep)
q_EC_KEY_free(ec);
ec = 0;
}
#endif
if (algorithm == QSsl::Opaque && opaque) {
if (deep)
q_EVP_PKEY_free(opaque);
opaque = 0;
}
}
bool QSslKeyPrivate::fromEVP_PKEY(EVP_PKEY *pkey)
{
if (pkey->type == EVP_PKEY_RSA) {
isNull = false;
algorithm = QSsl::Rsa;
type = QSsl::PrivateKey;
rsa = q_RSA_new();
memcpy(rsa, q_EVP_PKEY_get1_RSA(pkey), sizeof(RSA));
return true;
}
else if (pkey->type == EVP_PKEY_DSA) {
isNull = false;
algorithm = QSsl::Dsa;
type = QSsl::PrivateKey;
dsa = q_DSA_new();
memcpy(dsa, q_EVP_PKEY_get1_DSA(pkey), sizeof(DSA));
return true;
}
#ifndef OPENSSL_NO_EC
else if (pkey->type == EVP_PKEY_EC) {
isNull = false;
algorithm = QSsl::Ec;
type = QSsl::PrivateKey;
ec = q_EC_KEY_dup(q_EVP_PKEY_get1_EC_KEY(pkey));
return true;
}
#endif
else {
// Unknown key type. This could be handled as opaque, but then
// we'd eventually leak memory since we wouldn't be able to free
// the underlying EVP_PKEY structure. For now, we won't support
// this.
}
return false;
}
void QSslKeyPrivate::decodeDer(const QByteArray &der, bool deepClear)
{
QMap<QByteArray, QByteArray> headers;
decodePem(pemFromDer(der, headers), QByteArray(), deepClear);
}
void QSslKeyPrivate::decodePem(const QByteArray &pem, const QByteArray &passPhrase,
bool deepClear)
{
if (pem.isEmpty())
return;
clear(deepClear);
if (!QSslSocket::supportsSsl())
return;
BIO *bio = q_BIO_new_mem_buf(const_cast<char *>(pem.data()), pem.size());
if (!bio)
return;
void *phrase = const_cast<char *>(passPhrase.constData());
if (algorithm == QSsl::Rsa) {
RSA *result = (type == QSsl::PublicKey)
? q_PEM_read_bio_RSA_PUBKEY(bio, &rsa, 0, phrase)
: q_PEM_read_bio_RSAPrivateKey(bio, &rsa, 0, phrase);
if (rsa && rsa == result)
isNull = false;
} else if (algorithm == QSsl::Dsa) {
DSA *result = (type == QSsl::PublicKey)
? q_PEM_read_bio_DSA_PUBKEY(bio, &dsa, 0, phrase)
: q_PEM_read_bio_DSAPrivateKey(bio, &dsa, 0, phrase);
if (dsa && dsa == result)
isNull = false;
#ifndef OPENSSL_NO_EC
} else if (algorithm == QSsl::Ec) {
EC_KEY *result = (type == QSsl::PublicKey)
? q_PEM_read_bio_EC_PUBKEY(bio, &ec, 0, phrase)
: q_PEM_read_bio_ECPrivateKey(bio, &ec, 0, phrase);
if (ec && ec == result)
isNull = false;
#endif
}
q_BIO_free(bio);
}
int QSslKeyPrivate::length() const
{
if (isNull || algorithm == QSsl::Opaque)
return -1;
switch (algorithm) {
case QSsl::Rsa: return q_BN_num_bits(rsa->n);
case QSsl::Dsa: return q_BN_num_bits(dsa->p);
#ifndef OPENSSL_NO_EC
case QSsl::Ec: return q_EC_GROUP_get_degree(q_EC_KEY_get0_group(ec));
#endif
default: return -1;
}
}
QByteArray QSslKeyPrivate::toPem(const QByteArray &passPhrase) const
{
if (!QSslSocket::supportsSsl() || isNull || algorithm == QSsl::Opaque)
return QByteArray();
BIO *bio = q_BIO_new(q_BIO_s_mem());
if (!bio)
return QByteArray();
bool fail = false;
if (algorithm == QSsl::Rsa) {
if (type == QSsl::PublicKey) {
if (!q_PEM_write_bio_RSA_PUBKEY(bio, rsa))
fail = true;
} else {
if (!q_PEM_write_bio_RSAPrivateKey(
bio, rsa,
// ### the cipher should be selectable in the API:
passPhrase.isEmpty() ? (const EVP_CIPHER *)0 : q_EVP_des_ede3_cbc(),
const_cast<uchar *>((const uchar *)passPhrase.data()), passPhrase.size(), 0, 0)) {
fail = true;
}
}
} else if (algorithm == QSsl::Dsa) {
if (type == QSsl::PublicKey) {
if (!q_PEM_write_bio_DSA_PUBKEY(bio, dsa))
fail = true;
} else {
if (!q_PEM_write_bio_DSAPrivateKey(
bio, dsa,
// ### the cipher should be selectable in the API:
passPhrase.isEmpty() ? (const EVP_CIPHER *)0 : q_EVP_des_ede3_cbc(),
const_cast<uchar *>((const uchar *)passPhrase.data()), passPhrase.size(), 0, 0)) {
fail = true;
}
}
#ifndef OPENSSL_NO_EC
} else if (algorithm == QSsl::Ec) {
if (type == QSsl::PublicKey) {
if (!q_PEM_write_bio_EC_PUBKEY(bio, ec))
fail = true;
} else {
if (!q_PEM_write_bio_ECPrivateKey(
bio, ec,
// ### the cipher should be selectable in the API:
passPhrase.isEmpty() ? (const EVP_CIPHER *)0 : q_EVP_des_ede3_cbc(),
const_cast<uchar *>((const uchar *)passPhrase.data()), passPhrase.size(), 0, 0)) {
fail = true;
}
}
#endif
} else {
fail = true;
}
QByteArray pem;
if (!fail) {
char *data;
long size = q_BIO_get_mem_data(bio, &data);
pem = QByteArray(data, size);
}
q_BIO_free(bio);
return pem;
}
Qt::HANDLE QSslKeyPrivate::handle() const
{
switch (algorithm) {
case QSsl::Opaque:
return Qt::HANDLE(opaque);
case QSsl::Rsa:
return Qt::HANDLE(rsa);
case QSsl::Dsa:
return Qt::HANDLE(dsa);
#ifndef OPENSSL_NO_EC
case QSsl::Ec:
return Qt::HANDLE(ec);
#endif
default:
return Qt::HANDLE(NULL);
}
}
static QByteArray doCrypt(QSslKeyPrivate::Cipher cipher, const QByteArray &data, const QByteArray &key, const QByteArray &iv, int enc)
{
EVP_CIPHER_CTX ctx;
const EVP_CIPHER* type = 0;
int i = 0, len = 0;
switch (cipher) {
case QSslKeyPrivate::DesCbc:
type = q_EVP_des_cbc();
break;
case QSslKeyPrivate::DesEde3Cbc:
type = q_EVP_des_ede3_cbc();
break;
case QSslKeyPrivate::Rc2Cbc:
type = q_EVP_rc2_cbc();
break;
}
QByteArray output;
output.resize(data.size() + EVP_MAX_BLOCK_LENGTH);
q_EVP_CIPHER_CTX_init(&ctx);
q_EVP_CipherInit(&ctx, type, NULL, NULL, enc);
q_EVP_CIPHER_CTX_set_key_length(&ctx, key.size());
if (cipher == QSslKeyPrivate::Rc2Cbc)
q_EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_SET_RC2_KEY_BITS, 8 * key.size(), NULL);
q_EVP_CipherInit(&ctx, NULL,
reinterpret_cast<const unsigned char *>(key.constData()),
reinterpret_cast<const unsigned char *>(iv.constData()), enc);
q_EVP_CipherUpdate(&ctx,
reinterpret_cast<unsigned char *>(output.data()), &len,
reinterpret_cast<const unsigned char *>(data.constData()), data.size());
q_EVP_CipherFinal(&ctx,
reinterpret_cast<unsigned char *>(output.data()) + len, &i);
len += i;
q_EVP_CIPHER_CTX_cleanup(&ctx);
return output.left(len);
}
QByteArray QSslKeyPrivate::decrypt(Cipher cipher, const QByteArray &data, const QByteArray &key, const QByteArray &iv)
{
return doCrypt(cipher, data, key, iv, 0);
}
QByteArray QSslKeyPrivate::encrypt(Cipher cipher, const QByteArray &data, const QByteArray &key, const QByteArray &iv)
{
return doCrypt(cipher, data, key, iv, 1);
}
QT_END_NAMESPACE
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