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/*
* Copyright (c) 2015-2017 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/TLS/SecureTransport/SecureTransportCertificate.h>
#include <boost/numeric/conversion/cast.hpp>
#include <Cocoa/Cocoa.h>
#include <Security/Security.h>
#include <Swiften/Base/Log.h>
namespace {
template <typename T, typename S>
T bridge_cast(S source) {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wold-style-cast"
return (__bridge T)(source);
#pragma clang diagnostic pop
}
}
namespace {
inline std::string ns2StdString(NSString* _Nullable nsString);
inline std::string ns2StdString(NSString* _Nullable nsString) {
std::string stdString;
if (nsString != nil) {
stdString = std::string([nsString cStringUsingEncoding:NSUTF8StringEncoding]);
}
return stdString;
}
}
namespace Swift {
SecureTransportCertificate::SecureTransportCertificate(SecCertificateRef certificate) {
assert(certificate);
CFRetain(certificate);
certificateHandle_ = std::shared_ptr<SecCertificate>(certificate, CFRelease);
parse();
}
SecureTransportCertificate::SecureTransportCertificate(const ByteArray& der) {
CFDataRef derData = CFDataCreateWithBytesNoCopy(nullptr, der.data(), static_cast<CFIndex>(der.size()), nullptr);
// certificate will take ownership of derData and free it on its release.
SecCertificateRef certificate = SecCertificateCreateWithData(nullptr, derData);
if (certificate) {
certificateHandle_ = std::shared_ptr<SecCertificate>(certificate, CFRelease);
parse();
}
}
SecureTransportCertificate::~SecureTransportCertificate() {
}
void SecureTransportCertificate::parse() {
assert(certificateHandle_);
CFErrorRef error = nullptr;
// The SecCertificateCopyValues function is not part of the iOS Secure Transport API.
CFDictionaryRef valueDict = SecCertificateCopyValues(certificateHandle_.get(), nullptr, &error);
if (valueDict) {
// Handle subject.
CFStringRef subject = SecCertificateCopySubjectSummary(certificateHandle_.get());
if (subject) {
NSString* subjectStr = bridge_cast<NSString*>(subject);
subjectName_ = ns2StdString(subjectStr);
CFRelease(subject);
}
// Handle a single Common Name.
CFStringRef commonName = nullptr;
OSStatus error = SecCertificateCopyCommonName(certificateHandle_.get(), &commonName);
if (!error && commonName) {
NSString* commonNameStr = bridge_cast<NSString*>(commonName);
commonNames_.push_back(ns2StdString(commonNameStr));
}
if (commonName) {
CFRelease(commonName);
}
// Handle Subject Alternative Names
NSDictionary* certDict = bridge_cast<NSDictionary*>(valueDict);
NSDictionary* subjectAltNamesDict = certDict[@"2.5.29.17"][@"value"];
for (NSDictionary* entry in subjectAltNamesDict) {
NSString* label = entry[@"label"];
if ([label isEqualToString:static_cast<NSString * _Nonnull>([NSString stringWithUTF8String:ID_ON_XMPPADDR_OID])]) {
xmppAddresses_.push_back(ns2StdString(entry[@"value"]));
}
else if ([label isEqualToString:static_cast<NSString * _Nonnull>([NSString stringWithUTF8String:ID_ON_DNSSRV_OID])]) {
srvNames_.push_back(ns2StdString(entry[@"value"]));
}
else if ([label isEqualToString:@"DNS Name"]) {
dnsNames_.push_back(ns2StdString(entry[@"value"]));
}
}
CFRelease(valueDict);
}
if (error) {
CFRelease(error);
}
}
std::string SecureTransportCertificate::getSubjectName() const {
return subjectName_;
}
std::vector<std::string> SecureTransportCertificate::getCommonNames() const {
return commonNames_;
}
std::vector<std::string> SecureTransportCertificate::getSRVNames() const {
return srvNames_;
}
std::vector<std::string> SecureTransportCertificate::getDNSNames() const {
return dnsNames_;
}
std::vector<std::string> SecureTransportCertificate::getXMPPAddresses() const {
return xmppAddresses_;
}
ByteArray SecureTransportCertificate::toDER() const {
ByteArray der;
if (certificateHandle_) {
CFDataRef derData = SecCertificateCopyData(certificateHandle_.get());
if (derData) {
try {
size_t dataSize = boost::numeric_cast<size_t>(CFDataGetLength(derData));
der.resize(dataSize);
CFDataGetBytes(derData, CFRangeMake(0,CFDataGetLength(derData)), der.data());
} catch (...) {
}
CFRelease(derData);
}
}
return der;
}
}
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Swift