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/*
* Copyright (c) 2010 Remko Tronçon
* Licensed under the GNU General Public License v3.
* See Documentation/Licenses/GPLv3.txt for more information.
*/
#include "Swiften/Base/Platform.h"
#ifdef SWIFTEN_PLATFORM_WINDOWS
#include <windows.h>
#include <wincrypt.h>
#endif
#include <vector>
#include <openssl/err.h>
#include <openssl/pkcs12.h>
#include "Swiften/TLS/OpenSSL/OpenSSLContext.h"
#include "Swiften/TLS/OpenSSL/OpenSSLCertificate.h"
#include "Swiften/TLS/PKCS12Certificate.h"
#pragma GCC diagnostic ignored "-Wold-style-cast"
namespace Swift {
static const int MAX_FINISHED_SIZE = 4096;
static const int SSL_READ_BUFFERSIZE = 8192;
void freeX509Stack(STACK_OF(X509)* stack) {
sk_X509_free(stack);
}
OpenSSLContext::OpenSSLContext() : state_(Start), context_(0), handle_(0), readBIO_(0), writeBIO_(0) {
ensureLibraryInitialized();
context_ = SSL_CTX_new(TLSv1_client_method());
// Load system certs
#ifdef SWIFTEN_PLATFORM_WINDOWS
X509_STORE* store = SSL_CTX_get_cert_store(context_);
HCERTSTORE systemStore = CertOpenSystemStore(0, "ROOT");
if (systemStore) {
PCCERT_CONTEXT certContext = NULL;
while (true) {
certContext = CertFindCertificateInStore(systemStore, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, 0, CERT_FIND_ANY, NULL, certContext);
if (!certContext) {
break;
}
ByteArray certData(certContext->pbCertEncoded, certContext->cbCertEncoded);
OpenSSLCertificate cert(certData);
if (store && cert.getInternalX509()) {
X509_STORE_add_cert(store, cert.getInternalX509().get());
}
}
}
#endif
}
OpenSSLContext::~OpenSSLContext() {
SSL_free(handle_);
SSL_CTX_free(context_);
}
void OpenSSLContext::ensureLibraryInitialized() {
static bool isLibraryInitialized = false;
if (!isLibraryInitialized) {
SSL_load_error_strings();
SSL_library_init();
OpenSSL_add_all_algorithms();
isLibraryInitialized = true;
}
}
void OpenSSLContext::connect() {
handle_ = SSL_new(context_);
// Ownership of BIOs is ransferred
readBIO_ = BIO_new(BIO_s_mem());
writeBIO_ = BIO_new(BIO_s_mem());
SSL_set_bio(handle_, readBIO_, writeBIO_);
state_ = Connecting;
doConnect();
}
void OpenSSLContext::doConnect() {
int connectResult = SSL_connect(handle_);
int error = SSL_get_error(handle_, connectResult);
switch (error) {
case SSL_ERROR_NONE: {
state_ = Connected;
//std::cout << x->name << std::endl;
//const char* comp = SSL_get_current_compression(handle_);
//std::cout << "Compression: " << SSL_COMP_get_name(comp) << std::endl;
onConnected();
break;
}
case SSL_ERROR_WANT_READ:
sendPendingDataToNetwork();
break;
default:
state_ = Error;
onError();
}
}
void OpenSSLContext::sendPendingDataToNetwork() {
int size = BIO_pending(writeBIO_);
if (size > 0) {
ByteArray data;
data.resize(size);
BIO_read(writeBIO_, data.getData(), size);
onDataForNetwork(data);
}
}
void OpenSSLContext::handleDataFromNetwork(const ByteArray& data) {
BIO_write(readBIO_, data.getData(), data.getSize());
switch (state_) {
case Connecting:
doConnect();
break;
case Connected:
sendPendingDataToApplication();
break;
case Start: assert(false); break;
case Error: /*assert(false);*/ break;
}
}
void OpenSSLContext::handleDataFromApplication(const ByteArray& data) {
if (SSL_write(handle_, data.getData(), data.getSize()) >= 0) {
sendPendingDataToNetwork();
}
else {
state_ = Error;
onError();
}
}
void OpenSSLContext::sendPendingDataToApplication() {
ByteArray data;
data.resize(SSL_READ_BUFFERSIZE);
int ret = SSL_read(handle_, data.getData(), data.getSize());
while (ret > 0) {
data.resize(ret);
onDataForApplication(data);
data.resize(SSL_READ_BUFFERSIZE);
ret = SSL_read(handle_, data.getData(), data.getSize());
}
if (ret < 0 && SSL_get_error(handle_, ret) != SSL_ERROR_WANT_READ) {
state_ = Error;
onError();
}
}
bool OpenSSLContext::setClientCertificate(const PKCS12Certificate& certificate) {
if (certificate.isNull()) {
return false;
}
// Create a PKCS12 structure
BIO* bio = BIO_new(BIO_s_mem());
BIO_write(bio, certificate.getData().getData(), certificate.getData().getSize());
boost::shared_ptr<PKCS12> pkcs12(d2i_PKCS12_bio(bio, NULL), PKCS12_free);
BIO_free(bio);
if (!pkcs12) {
return false;
}
// Parse PKCS12
X509 *certPtr = 0;
EVP_PKEY* privateKeyPtr = 0;
STACK_OF(X509)* caCertsPtr = 0;
int result = PKCS12_parse(pkcs12.get(), certificate.getPassword().getUTF8Data(), &privateKeyPtr, &certPtr, &caCertsPtr);
if (result != 1) {
return false;
}
boost::shared_ptr<X509> cert(certPtr, X509_free);
boost::shared_ptr<EVP_PKEY> privateKey(privateKeyPtr, EVP_PKEY_free);
boost::shared_ptr<STACK_OF(X509)> caCerts(caCertsPtr, freeX509Stack);
// Use the key & certificates
if (SSL_CTX_use_certificate(context_, cert.get()) != 1) {
return false;
}
if (SSL_CTX_use_PrivateKey(context_, privateKey.get()) != 1) {
return false;
}
for (int i = 0; i < sk_X509_num(caCerts.get()); ++i) {
SSL_CTX_add_extra_chain_cert(context_, sk_X509_value(caCerts.get(), i));
}
return true;
}
Certificate::ref OpenSSLContext::getPeerCertificate() const {
boost::shared_ptr<X509> x509Cert(SSL_get_peer_certificate(handle_), X509_free);
if (x509Cert) {
return Certificate::ref(new OpenSSLCertificate(x509Cert));
}
else {
return Certificate::ref();
}
}
boost::shared_ptr<CertificateVerificationError> OpenSSLContext::getPeerCertificateVerificationError() const {
int verifyResult = SSL_get_verify_result(handle_);
if (verifyResult != X509_V_OK) {
return boost::shared_ptr<CertificateVerificationError>(new CertificateVerificationError(getVerificationErrorTypeForResult(verifyResult)));
}
else {
return boost::shared_ptr<CertificateVerificationError>();
}
}
ByteArray OpenSSLContext::getFinishMessage() const {
ByteArray data;
data.resize(MAX_FINISHED_SIZE);
size_t size = SSL_get_finished(handle_, data.getData(), data.getSize());
data.resize(size);
return data;
}
CertificateVerificationError::Type OpenSSLContext::getVerificationErrorTypeForResult(int result) {
assert(result != 0);
switch (result) {
case X509_V_ERR_CERT_NOT_YET_VALID:
case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
return CertificateVerificationError::NotYetValid;
case X509_V_ERR_CERT_HAS_EXPIRED:
case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
return CertificateVerificationError::Expired;
case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
return CertificateVerificationError::SelfSigned;
case X509_V_ERR_CERT_UNTRUSTED:
return CertificateVerificationError::Untrusted;
case X509_V_ERR_CERT_REJECTED:
return CertificateVerificationError::Rejected;
case X509_V_ERR_INVALID_PURPOSE:
return CertificateVerificationError::InvalidPurpose;
case X509_V_ERR_PATH_LENGTH_EXCEEDED:
return CertificateVerificationError::PathLengthExceeded;
case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
case X509_V_ERR_CERT_SIGNATURE_FAILURE:
case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
return CertificateVerificationError::InvalidSignature;
case X509_V_ERR_INVALID_CA:
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
return CertificateVerificationError::InvalidCA;
case X509_V_ERR_SUBJECT_ISSUER_MISMATCH:
case X509_V_ERR_AKID_SKID_MISMATCH:
case X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH:
case X509_V_ERR_KEYUSAGE_NO_CERTSIGN:
return CertificateVerificationError::UnknownError;
// Unused / should not happen
case X509_V_ERR_CERT_REVOKED:
case X509_V_ERR_OUT_OF_MEM:
case X509_V_ERR_UNABLE_TO_GET_CRL:
case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
case X509_V_ERR_CRL_SIGNATURE_FAILURE:
case X509_V_ERR_CRL_NOT_YET_VALID:
case X509_V_ERR_CRL_HAS_EXPIRED:
case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
case X509_V_ERR_CERT_CHAIN_TOO_LONG:
case X509_V_ERR_APPLICATION_VERIFICATION:
default:
return CertificateVerificationError::UnknownError;
}
}
}
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