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/* Copyright (C) 2005-2011, Thorvald Natvig <thorvald@natvig.com>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
- Neither the name of the Mumble Developers nor the names of its
contributors may be used to endorse or promote products derived from this
software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "Server.h"
#include "Meta.h"
#define SSL_STRING(x) QString::fromLatin1(x).toUtf8().data()
static int add_ext(X509 * crt, int nid, char *value) {
X509_EXTENSION *ex;
X509V3_CTX ctx;
X509V3_set_ctx_nodb(&ctx);
X509V3_set_ctx(&ctx, crt, crt, NULL, NULL, 0);
ex = X509V3_EXT_conf_nid(NULL, &ctx, nid, value);
if (!ex)
return 0;
X509_add_ext(crt, ex, -1);
X509_EXTENSION_free(ex);
return 1;
}
bool Server::isKeyForCert(const QSslKey &key, const QSslCertificate &cert) {
if (key.isNull() || cert.isNull() || (key.type() != QSsl::PrivateKey))
return false;
QByteArray qbaKey = key.toDer();
QByteArray qbaCert = cert.toDer();
X509 *x509 = NULL;
EVP_PKEY *pkey = NULL;
BIO *mem = NULL;
mem = BIO_new_mem_buf(qbaKey.data(), qbaKey.size());
BIO_set_close(mem, BIO_NOCLOSE);
pkey = d2i_PrivateKey_bio(mem, NULL);
BIO_free(mem);
mem = BIO_new_mem_buf(qbaCert.data(), qbaCert.size());
BIO_set_close(mem, BIO_NOCLOSE);
x509 = d2i_X509_bio(mem, NULL);
BIO_free(mem);
mem = NULL;
if (x509 && pkey && X509_check_private_key(x509, pkey)) {
EVP_PKEY_free(pkey);
X509_free(x509);
return true;
}
if (pkey)
EVP_PKEY_free(pkey);
if (x509)
X509_free(x509);
return false;
}
void Server::initializeCert() {
QByteArray crt, key, pass;
crt = getConf("certificate", QString()).toByteArray();
key = getConf("key", QString()).toByteArray();
pass = getConf("passphrase", QByteArray()).toByteArray();
QList<QSslCertificate> ql;
if (! key.isEmpty()) {
qskKey = QSslKey(key, QSsl::Rsa, QSsl::Pem, QSsl::PrivateKey, pass);
if (qskKey.isNull())
qskKey = QSslKey(key, QSsl::Dsa, QSsl::Pem, QSsl::PrivateKey, pass);
}
if (qskKey.isNull() && ! crt.isEmpty()) {
qskKey = QSslKey(crt, QSsl::Rsa, QSsl::Pem, QSsl::PrivateKey, pass);
if (qskKey.isNull())
qskKey = QSslKey(crt, QSsl::Dsa, QSsl::Pem, QSsl::PrivateKey, pass);
}
if (! qskKey.isNull()) {
ql << QSslCertificate::fromData(crt);
ql << QSslCertificate::fromData(key);
for (int i=0;i<ql.size();++i) {
const QSslCertificate &c = ql.at(i);
if (isKeyForCert(qskKey, c)) {
qscCert = c;
ql.removeAt(i);
}
}
qlCA = ql;
}
if (qscCert.issuerInfo(QSslCertificate::CommonName) == QLatin1String("Murmur Autogenerated Certificate")) {
log("Old autogenerated certificate is unusable for registration, invalidating it");
qscCert = QSslCertificate();
qskKey = QSslKey();
}
if (!qscCert.isNull() && (qscCert.issuerInfo(QSslCertificate::CommonName) == QLatin1String("Murmur Autogenerated Certificate v2")) && ! Meta::mp.qscCert.isNull() && ! Meta::mp.qskKey.isNull() && (Meta::mp.qlBind == qlBind)) {
qscCert = Meta::mp.qscCert;
qskKey = Meta::mp.qskKey;
}
if (qscCert.isNull() || qskKey.isNull()) {
if (! key.isEmpty() || ! crt.isEmpty()) {
log("Certificate specified, but failed to load.");
}
qskKey = Meta::mp.qskKey;
qscCert = Meta::mp.qscCert;
if (qscCert.isNull() || qskKey.isNull()) {
log("Generating new server certificate.");
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
X509 *x509 = X509_new();
EVP_PKEY *pkey = EVP_PKEY_new();
RSA *rsa = RSA_generate_key(2048,RSA_F4,NULL,NULL);
EVP_PKEY_assign_RSA(pkey, rsa);
X509_set_version(x509, 2);
ASN1_INTEGER_set(X509_get_serialNumber(x509),1);
X509_gmtime_adj(X509_get_notBefore(x509),0);
X509_gmtime_adj(X509_get_notAfter(x509),60*60*24*365*20);
X509_set_pubkey(x509, pkey);
X509_NAME *name=X509_get_subject_name(x509);
X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC, reinterpret_cast<unsigned char *>(const_cast<char *>("Murmur Autogenerated Certificate v2")), -1, -1, 0);
X509_set_issuer_name(x509, name);
add_ext(x509, NID_basic_constraints, SSL_STRING("critical,CA:FALSE"));
add_ext(x509, NID_ext_key_usage, SSL_STRING("serverAuth,clientAuth"));
add_ext(x509, NID_subject_key_identifier, SSL_STRING("hash"));
add_ext(x509, NID_netscape_comment, SSL_STRING("Generated from murmur"));
X509_sign(x509, pkey, EVP_sha1());
crt.resize(i2d_X509(x509, NULL));
unsigned char *dptr=reinterpret_cast<unsigned char *>(crt.data());
i2d_X509(x509, &dptr);
qscCert = QSslCertificate(crt, QSsl::Der);
if (qscCert.isNull())
log("Certificate generation failed");
key.resize(i2d_PrivateKey(pkey, NULL));
dptr=reinterpret_cast<unsigned char *>(key.data());
i2d_PrivateKey(pkey, &dptr);
qskKey = QSslKey(key, QSsl::Rsa, QSsl::Der);
if (qskKey.isNull())
log("Key generation failed");
setConf("certificate", qscCert.toPem());
setConf("key", qskKey.toPem());
}
}
}
const QString Server::getDigest() const {
return QString::fromLatin1(qscCert.digest().toHex());
}
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