eca5fb894f
* feat: Added LEB128 in data inspector * feat: Added support for editing LEB128 values * Moved LEB functions from utils.cpp to crypto.cpp * Added placeholders for translations * Made DataInspector::impl::Entry.maxSize mandatory * Fixed undefined leftshifting behaviour
577 lines
17 KiB
C++
577 lines
17 KiB
C++
#include <hex/helpers/crypto.hpp>
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#include <hex/providers/provider.hpp>
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#include <hex/helpers/utils.hpp>
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#include <hex/helpers/concepts.hpp>
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#include <mbedtls/version.h>
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#include <mbedtls/base64.h>
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#include <mbedtls/bignum.h>
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#include <mbedtls/md5.h>
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#include <mbedtls/sha1.h>
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#include <mbedtls/sha256.h>
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#include <mbedtls/sha512.h>
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#include <mbedtls/aes.h>
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#include <mbedtls/cipher.h>
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#include <array>
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#include <span>
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#include <functional>
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#include <algorithm>
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#include <cstddef>
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#include <cstdint>
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#include <bit>
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#if MBEDTLS_VERSION_MAJOR <= 2
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#define mbedtls_md5_starts mbedtls_md5_starts_ret
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#define mbedtls_md5_update mbedtls_md5_update_ret
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#define mbedtls_md5_finish mbedtls_md5_finish_ret
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#define mbedtls_sha1_starts mbedtls_sha1_starts_ret
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#define mbedtls_sha1_update mbedtls_sha1_update_ret
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#define mbedtls_sha1_finish mbedtls_sha1_finish_ret
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#define mbedtls_sha256_starts mbedtls_sha256_starts_ret
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#define mbedtls_sha256_update mbedtls_sha256_update_ret
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#define mbedtls_sha256_finish mbedtls_sha256_finish_ret
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#define mbedtls_sha512_starts mbedtls_sha512_starts_ret
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#define mbedtls_sha512_update mbedtls_sha512_update_ret
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#define mbedtls_sha512_finish mbedtls_sha512_finish_ret
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#endif
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namespace hex::crypt {
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using namespace std::placeholders;
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template<std::invocable<unsigned char *, size_t> Func>
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void processDataByChunks(prv::Provider *data, u64 offset, size_t size, Func func) {
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std::array<u8, 512> buffer = { 0 };
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for (size_t bufferOffset = 0; bufferOffset < size; bufferOffset += buffer.size()) {
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const auto readSize = std::min(buffer.size(), size - bufferOffset);
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data->read(offset + bufferOffset, buffer.data(), readSize);
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func(buffer.data(), readSize);
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}
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}
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template<typename T>
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T reflect(T in, std::size_t bits) {
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T out {};
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for (std::size_t i = 0; i < bits; i++) {
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out <<= 1;
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if (in & 0b1)
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out |= 1;
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in >>= 1;
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}
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return out;
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}
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template<typename T>
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T reflect(T in) {
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if constexpr (sizeof(T) == 1) {
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T out { in };
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out = ((out & 0xf0u) >> 4) | ((out & 0x0fu) << 4);
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out = ((out & 0xccu) >> 2) | ((out & 0x33u) << 2);
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out = ((out & 0xaau) >> 1) | ((out & 0x55u) << 1);
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return out;
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} else {
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return reflect(in, sizeof(T) * 8);
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}
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}
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template<size_t NumBits> requires (std::has_single_bit(NumBits))
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class Crc {
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// use reflected algorithm, so we reflect only if refin / refout is FALSE
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// mask values, 0b1 << 64 is UB, so use 0b10 << 63
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public:
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constexpr Crc(u64 polynomial, u64 init, u64 xorOut, bool reflectInput, bool reflectOutput)
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: m_value(0x00), m_init(init & ((0b10ull << (NumBits - 1)) - 1)), m_xorOut(xorOut & ((0b10ull << (NumBits - 1)) - 1)),
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m_reflectInput(reflectInput), m_reflectOutput(reflectOutput),
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m_table([polynomial]() {
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auto reflectedPoly = reflect(polynomial & ((0b10ull << (NumBits - 1)) - 1), NumBits);
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std::array<uint64_t, 256> table = { 0 };
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for (uint32_t i = 0; i < 256; i++) {
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uint64_t c = i;
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for (std::size_t j = 0; j < 8; j++) {
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if (c & 0b1)
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c = reflectedPoly ^ (c >> 1);
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else
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c >>= 1;
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}
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table[i] = c;
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}
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return table;
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}()) {
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reset();
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};
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constexpr void reset() {
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this->m_value = reflect(m_init, NumBits);
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}
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constexpr void processBytes(const unsigned char *data, std::size_t size) {
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for (std::size_t i = 0; i < size; i++) {
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u8 byte;
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if (this->m_reflectInput)
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byte = data[i];
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else
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byte = reflect(data[i]);
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this->m_value = this->m_table[(this->m_value ^ byte) & 0xFFL] ^ (this->m_value >> 8);
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}
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}
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[[nodiscard]]
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constexpr u64 checksum() const {
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if (this->m_reflectOutput)
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return this->m_value ^ m_xorOut;
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else
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return reflect(this->m_value, NumBits) ^ m_xorOut;
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}
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private:
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u64 m_value;
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u64 m_init;
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u64 m_xorOut;
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bool m_reflectInput;
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bool m_reflectOutput;
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std::array<uint64_t, 256> m_table;
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};
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template<size_t NumBits>
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auto calcCrc(prv::Provider *data, u64 offset, std::size_t size, u32 polynomial, u32 init, u32 xorout, bool reflectIn, bool reflectOut) {
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using Crc = Crc<NumBits>;
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Crc crc(polynomial, init, xorout, reflectIn, reflectOut);
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processDataByChunks(data, offset, size, std::bind(&Crc::processBytes, &crc, _1, _2));
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return crc.checksum();
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}
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u16 crc8(prv::Provider *&data, u64 offset, size_t size, u32 polynomial, u32 init, u32 xorOut, bool reflectIn, bool reflectOut) {
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return calcCrc<8>(data, offset, size, polynomial, init, xorOut, reflectIn, reflectOut);
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}
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u16 crc16(prv::Provider *&data, u64 offset, size_t size, u32 polynomial, u32 init, u32 xorOut, bool reflectIn, bool reflectOut) {
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return calcCrc<16>(data, offset, size, polynomial, init, xorOut, reflectIn, reflectOut);
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}
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u32 crc32(prv::Provider *&data, u64 offset, size_t size, u32 polynomial, u32 init, u32 xorOut, bool reflectIn, bool reflectOut) {
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return calcCrc<32>(data, offset, size, polynomial, init, xorOut, reflectIn, reflectOut);
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}
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std::array<u8, 16> md5(prv::Provider *&data, u64 offset, size_t size) {
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std::array<u8, 16> result = { 0 };
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mbedtls_md5_context ctx;
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mbedtls_md5_init(&ctx);
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mbedtls_md5_starts(&ctx);
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processDataByChunks(data, offset, size, std::bind(mbedtls_md5_update, &ctx, _1, _2));
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mbedtls_md5_finish(&ctx, result.data());
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mbedtls_md5_free(&ctx);
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return result;
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}
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std::array<u8, 16> md5(const std::vector<u8> &data) {
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std::array<u8, 16> result = { 0 };
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mbedtls_md5_context ctx;
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mbedtls_md5_init(&ctx);
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mbedtls_md5_starts(&ctx);
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mbedtls_md5_update(&ctx, data.data(), data.size());
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mbedtls_md5_finish(&ctx, result.data());
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mbedtls_md5_free(&ctx);
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return result;
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}
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std::array<u8, 20> sha1(prv::Provider *&data, u64 offset, size_t size) {
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std::array<u8, 20> result = { 0 };
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mbedtls_sha1_context ctx;
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mbedtls_sha1_init(&ctx);
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mbedtls_sha1_starts(&ctx);
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processDataByChunks(data, offset, size, std::bind(mbedtls_sha1_update, &ctx, _1, _2));
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mbedtls_sha1_finish(&ctx, result.data());
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mbedtls_sha1_free(&ctx);
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return result;
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}
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std::array<u8, 20> sha1(const std::vector<u8> &data) {
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std::array<u8, 20> result = { 0 };
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mbedtls_sha1_context ctx;
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mbedtls_sha1_init(&ctx);
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mbedtls_sha1_starts(&ctx);
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mbedtls_sha1_update(&ctx, data.data(), data.size());
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mbedtls_sha1_finish(&ctx, result.data());
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mbedtls_sha1_free(&ctx);
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return result;
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}
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std::array<u8, 28> sha224(prv::Provider *&data, u64 offset, size_t size) {
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std::array<u8, 28> result = { 0 };
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mbedtls_sha256_context ctx;
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mbedtls_sha256_init(&ctx);
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mbedtls_sha256_starts(&ctx, true);
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processDataByChunks(data, offset, size, std::bind(mbedtls_sha256_update, &ctx, _1, _2));
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mbedtls_sha256_finish(&ctx, result.data());
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mbedtls_sha256_free(&ctx);
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return result;
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}
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std::array<u8, 28> sha224(const std::vector<u8> &data) {
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std::array<u8, 28> result = { 0 };
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mbedtls_sha256_context ctx;
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mbedtls_sha256_init(&ctx);
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mbedtls_sha256_starts(&ctx, true);
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mbedtls_sha256_update(&ctx, data.data(), data.size());
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mbedtls_sha256_finish(&ctx, result.data());
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mbedtls_sha256_free(&ctx);
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return result;
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}
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std::array<u8, 32> sha256(prv::Provider *&data, u64 offset, size_t size) {
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std::array<u8, 32> result = { 0 };
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mbedtls_sha256_context ctx;
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mbedtls_sha256_init(&ctx);
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mbedtls_sha256_starts(&ctx, false);
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processDataByChunks(data, offset, size, std::bind(mbedtls_sha256_update, &ctx, _1, _2));
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mbedtls_sha256_finish(&ctx, result.data());
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mbedtls_sha256_free(&ctx);
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return result;
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}
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std::array<u8, 32> sha256(const std::vector<u8> &data) {
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std::array<u8, 32> result = { 0 };
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mbedtls_sha256_context ctx;
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mbedtls_sha256_init(&ctx);
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mbedtls_sha256_starts(&ctx, false);
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mbedtls_sha256_update(&ctx, data.data(), data.size());
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mbedtls_sha256_finish(&ctx, result.data());
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mbedtls_sha256_free(&ctx);
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return result;
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}
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std::array<u8, 48> sha384(prv::Provider *&data, u64 offset, size_t size) {
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std::array<u8, 48> result = { 0 };
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mbedtls_sha512_context ctx;
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mbedtls_sha512_init(&ctx);
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mbedtls_sha512_starts(&ctx, true);
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processDataByChunks(data, offset, size, std::bind(mbedtls_sha512_update, &ctx, _1, _2));
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mbedtls_sha512_finish(&ctx, result.data());
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mbedtls_sha512_free(&ctx);
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return result;
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}
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std::array<u8, 48> sha384(const std::vector<u8> &data) {
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std::array<u8, 48> result = { 0 };
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mbedtls_sha512_context ctx;
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mbedtls_sha512_init(&ctx);
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mbedtls_sha512_starts(&ctx, true);
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mbedtls_sha512_update(&ctx, data.data(), data.size());
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mbedtls_sha512_finish(&ctx, result.data());
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mbedtls_sha512_free(&ctx);
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return result;
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}
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std::array<u8, 64> sha512(prv::Provider *&data, u64 offset, size_t size) {
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std::array<u8, 64> result = { 0 };
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mbedtls_sha512_context ctx;
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mbedtls_sha512_init(&ctx);
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mbedtls_sha512_starts(&ctx, false);
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processDataByChunks(data, offset, size, std::bind(mbedtls_sha512_update, &ctx, _1, _2));
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mbedtls_sha512_finish(&ctx, result.data());
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mbedtls_sha512_free(&ctx);
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return result;
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}
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std::array<u8, 64> sha512(const std::vector<u8> &data) {
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std::array<u8, 64> result = { 0 };
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mbedtls_sha512_context ctx;
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mbedtls_sha512_init(&ctx);
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mbedtls_sha512_starts(&ctx, false);
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mbedtls_sha512_update(&ctx, data.data(), data.size());
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mbedtls_sha512_finish(&ctx, result.data());
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mbedtls_sha512_free(&ctx);
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return result;
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}
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std::vector<u8> decode64(const std::vector<u8> &input) {
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size_t written = 0;
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mbedtls_base64_decode(nullptr, 0, &written, reinterpret_cast<const unsigned char *>(input.data()), input.size());
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std::vector<u8> output(written, 0x00);
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if (mbedtls_base64_decode(output.data(), output.size(), &written, reinterpret_cast<const unsigned char *>(input.data()), input.size()))
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return {};
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output.resize(written);
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return output;
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}
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std::vector<u8> encode64(const std::vector<u8> &input) {
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size_t written = 0;
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mbedtls_base64_encode(nullptr, 0, &written, reinterpret_cast<const unsigned char *>(input.data()), input.size());
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std::vector<u8> output(written, 0x00);
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if (mbedtls_base64_encode(output.data(), output.size(), &written, reinterpret_cast<const unsigned char *>(input.data()), input.size()))
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return {};
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output.resize(written);
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return output;
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}
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std::vector<u8> decode16(const std::string &input) {
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std::vector<u8> output(input.length() / 2, 0x00);
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mbedtls_mpi ctx;
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mbedtls_mpi_init(&ctx);
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ON_SCOPE_EXIT { mbedtls_mpi_free(&ctx); };
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if (mbedtls_mpi_read_string(&ctx, 16, input.c_str()))
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return {};
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if (mbedtls_mpi_write_binary(&ctx, output.data(), output.size()))
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return {};
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return output;
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}
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std::string encode16(const std::vector<u8> &input) {
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if (input.empty())
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return {};
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std::string output(input.size() * 2, '\0');
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for (size_t i = 0; i < input.size(); i++) {
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output[2 * i + 0] = "0123456789ABCDEF"[input[i] / 16];
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output[2 * i + 1] = "0123456789ABCDEF"[input[i] % 16];
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}
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return output;
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}
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template<typename T>
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static T safeLeftShift(T t, u32 shift) {
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if (shift >= sizeof(t) * 8) {
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return 0;
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} else {
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return t << shift;
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}
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}
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template<typename T>
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static T decodeLeb128(const std::vector<u8> &bytes) {
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T value = 0;
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u32 shift = 0;
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u8 b = 0;
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for (u8 byte : bytes) {
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b = byte;
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value |= safeLeftShift(static_cast<T>(byte & 0x7F), shift);
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shift += 7;
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if ((byte & 0x80) == 0) {
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break;
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}
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}
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if constexpr(std::is_signed<T>::value) {
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if ((b & 0x40) != 0) {
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value |= safeLeftShift(~static_cast<T>(0), shift);
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}
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}
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return value;
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}
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u128 decodeUleb128(const std::vector<u8> &bytes) {
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return decodeLeb128<u128>(bytes);
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}
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i128 decodeSleb128(const std::vector<u8> &bytes) {
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return decodeLeb128<i128>(bytes);
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}
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template<typename T>
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static std::vector<u8> encodeLeb128(T value) {
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std::vector<u8> bytes;
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u8 byte;
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while (true) {
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byte = value & 0x7F;
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value >>= 7;
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if constexpr(std::is_signed<T>::value) {
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if (value == 0 && (byte & 0x40) == 0) {
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break;
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}
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if (value == -1 && (byte & 0x40) != 0) {
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break;
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}
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} else {
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if (value == 0) {
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break;
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}
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}
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bytes.push_back(byte | 0x80);
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}
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bytes.push_back(byte);
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return bytes;
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}
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std::vector<u8> encodeUleb128(u128 value) {
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return encodeLeb128<u128>(value);
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}
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std::vector<u8> encodeSleb128(i128 value) {
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return encodeLeb128<i128>(value);
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}
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static std::vector<u8> aes(mbedtls_cipher_type_t type, mbedtls_operation_t operation, const std::vector<u8> &key, std::array<u8, 8> nonce, std::array<u8, 8> iv, const std::vector<u8> &input) {
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std::vector<u8> output;
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if (input.empty())
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return {};
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if (key.size() > 256)
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return {};
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mbedtls_cipher_context_t ctx;
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auto cipherInfo = mbedtls_cipher_info_from_type(type);
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|
|
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mbedtls_cipher_setup(&ctx, cipherInfo);
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mbedtls_cipher_setkey(&ctx, key.data(), static_cast<int>(key.size() * 8), operation);
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|
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std::array<u8, 16> nonceCounter = { 0 };
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std::copy(nonce.begin(), nonce.end(), nonceCounter.begin());
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std::copy(iv.begin(), iv.end(), nonceCounter.begin() + 8);
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|
|
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size_t outputSize = input.size() + mbedtls_cipher_get_block_size(&ctx);
|
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output.resize(outputSize, 0x00);
|
|
mbedtls_cipher_crypt(&ctx, nonceCounter.data(), nonceCounter.size(), input.data(), input.size(), output.data(), &outputSize);
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|
|
|
mbedtls_cipher_free(&ctx);
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|
|
|
output.resize(input.size());
|
|
|
|
return output;
|
|
}
|
|
|
|
std::vector<u8> aesDecrypt(AESMode mode, KeyLength keyLength, const std::vector<u8> &key, std::array<u8, 8> nonce, std::array<u8, 8> iv, const std::vector<u8> &input) {
|
|
switch (keyLength) {
|
|
case KeyLength::Key128Bits:
|
|
if (key.size() != 128 / 8) return {};
|
|
break;
|
|
case KeyLength::Key192Bits:
|
|
if (key.size() != 192 / 8) return {};
|
|
break;
|
|
case KeyLength::Key256Bits:
|
|
if (key.size() != 256 / 8) return {};
|
|
break;
|
|
default:
|
|
return {};
|
|
}
|
|
|
|
mbedtls_cipher_type_t type;
|
|
switch (mode) {
|
|
case AESMode::ECB:
|
|
type = MBEDTLS_CIPHER_AES_128_ECB;
|
|
break;
|
|
case AESMode::CBC:
|
|
type = MBEDTLS_CIPHER_AES_128_CBC;
|
|
break;
|
|
case AESMode::CFB128:
|
|
type = MBEDTLS_CIPHER_AES_128_CFB128;
|
|
break;
|
|
case AESMode::CTR:
|
|
type = MBEDTLS_CIPHER_AES_128_CTR;
|
|
break;
|
|
case AESMode::GCM:
|
|
type = MBEDTLS_CIPHER_AES_128_GCM;
|
|
break;
|
|
case AESMode::CCM:
|
|
type = MBEDTLS_CIPHER_AES_128_CCM;
|
|
break;
|
|
case AESMode::OFB:
|
|
type = MBEDTLS_CIPHER_AES_128_OFB;
|
|
break;
|
|
case AESMode::XTS:
|
|
type = MBEDTLS_CIPHER_AES_128_XTS;
|
|
break;
|
|
default:
|
|
return {};
|
|
}
|
|
|
|
type = mbedtls_cipher_type_t(type + u8(keyLength));
|
|
|
|
return aes(type, MBEDTLS_DECRYPT, key, nonce, iv, input);
|
|
}
|
|
|
|
}
|