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/*
* Copyright (c) 2013-2018 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/Crypto/CommonCryptoCryptoProvider.h>
#include <cassert>
#include <boost/numeric/conversion/cast.hpp>
#include <CommonCrypto/CommonDigest.h>
#include <CommonCrypto/CommonHMAC.h>
#include <Swiften/Base/ByteArray.h>
#include <Swiften/Crypto/Hash.h>
using namespace Swift;
namespace {
class SHA1Hash : public Hash {
public:
SHA1Hash() : finalized(false) {
if (!CC_SHA1_Init(&context)) {
assert(false);
}
}
virtual ~SHA1Hash() override {
}
virtual Hash& update(const ByteArray& data) override {
return updateInternal(data);
}
virtual Hash& update(const SafeByteArray& data) override {
return updateInternal(data);
}
virtual std::vector<unsigned char> getHash() override {
assert(!finalized);
std::vector<unsigned char> result(CC_SHA1_DIGEST_LENGTH);
CC_SHA1_Final(vecptr(result), &context);
return result;
}
private:
template<typename ContainerType>
Hash& updateInternal(const ContainerType& data) {
assert(!finalized);
try {
if (!CC_SHA1_Update(&context, vecptr(data), boost::numeric_cast<CC_LONG>(data.size()))) {
assert(false);
}
}
catch (const boost::numeric::bad_numeric_cast&) {
assert(false);
}
return *this;
}
private:
CC_SHA1_CTX context;
bool finalized;
};
class MD5Hash : public Hash {
public:
MD5Hash() : finalized(false) {
if (!CC_MD5_Init(&context)) {
assert(false);
}
}
virtual ~MD5Hash() override {
}
virtual Hash& update(const ByteArray& data) override {
return updateInternal(data);
}
virtual Hash& update(const SafeByteArray& data) override {
return updateInternal(data);
}
virtual std::vector<unsigned char> getHash() override {
assert(!finalized);
std::vector<unsigned char> result(CC_MD5_DIGEST_LENGTH);
CC_MD5_Final(vecptr(result), &context);
return result;
}
private:
template<typename ContainerType>
Hash& updateInternal(const ContainerType& data) {
assert(!finalized);
try {
if (!CC_MD5_Update(&context, vecptr(data), boost::numeric_cast<CC_LONG>(data.size()))) {
assert(false);
}
}
catch (const boost::numeric::bad_numeric_cast&) {
assert(false);
}
return *this;
}
private:
CC_MD5_CTX context;
bool finalized;
};
template<typename T>
ByteArray getHMACSHA1Internal(const T& key, const ByteArray& data) {
std::vector<unsigned char> result(CC_SHA1_DIGEST_LENGTH);
try {
CCHmac(kCCHmacAlgSHA1, vecptr(key), key.size(), vecptr(data), boost::numeric_cast<CC_LONG>(data.size()), vecptr(result));
}
catch (const boost::numeric::bad_numeric_cast&) {
assert(false);
}
return result;
}
}
CommonCryptoCryptoProvider::CommonCryptoCryptoProvider() {
}
CommonCryptoCryptoProvider::~CommonCryptoCryptoProvider() {
}
Hash* CommonCryptoCryptoProvider::createSHA1() {
return new SHA1Hash();
}
Hash* CommonCryptoCryptoProvider::createMD5() {
return new MD5Hash();
}
ByteArray CommonCryptoCryptoProvider::getHMACSHA1(const SafeByteArray& key, const ByteArray& data) {
return getHMACSHA1Internal(key, data);
}
ByteArray CommonCryptoCryptoProvider::getHMACSHA1(const ByteArray& key, const ByteArray& data) {
return getHMACSHA1Internal(key, data);
}
bool CommonCryptoCryptoProvider::isMD5AllowedForCrypto() const {
return true;
}
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Swift