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Add a copy of the AES algorithm using TBoxes

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Manuel Thalmann 2023-12-12 19:26:36 +01:00
parent e27a7f39f0
commit b67ad5a599
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22
HWBTutorials.code-workspace
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@ -15,6 +15,10 @@
"name": "AES 32-bit",
"path": "./aes-32bit"
},
{
"name": "AES TBoxes",
"path": "./aes-tboxes"
},
{
"name": "TRNG Attack",
"path": "./TRNG_attack"
@ -103,6 +107,15 @@
"cwd": "${workspaceFolder:AES 32-bit}"
},
"problemMatcher": []
},
{
"label": "Build AES TBoxes Project",
"type": "shell",
"command": "make",
"options": {
"cwd": "${workspaceFolder:AES TBoxes}"
},
"problemMatcher": []
}
]
},
@ -129,6 +142,15 @@
"args": [],
"cwd": "${workspaceFolder:AES 32-bit}",
"preLaunchTask": "Build 32-bit AES Project"
},
{
"type": "lldb",
"request": "launch",
"name": "Launch AES TBoxes Project",
"program": "${workspaceFolder:AES TBoxes}/bin/aes",
"args": [],
"cwd": "${workspaceFolder:AES TBoxes}",
"preLaunchTask": "Build AES TBoxes Project"
}
],
"compounds": []

14
aes-tboxes/Makefile Normal file
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@ -0,0 +1,14 @@
CPPFLAGS = -g -Ofast
BUILD_DIR = bin
$(BUILD_DIR)/aes: $(BUILD_DIR)/aes.o
mkdir -p $(dir $@)
$(CXX) $(CPPFLAGS) $(CXXFLAGS) $< -o $@
$(BUILD_DIR)/%.o: %.cpp
mkdir -p $(dir $@)
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@
clean:
rm -rf $(BUILD_DIR)

214
aes-tboxes/aes.cpp Normal file
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@ -0,0 +1,214 @@
#include <chrono>
#include <cstdio>
#include <iostream>
#include <stdint.h>
#include <stdlib.h>
/* AES-128 simple implementation template and testing */
/*
Author: Manuel Thalmann, thalmman@fit.cvut.cz
Template: Jiri Bucek 2017
AES specification:
http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
*/
#define WORD(byte0, byte1, byte2, byte3) ((((((uint16_t)(byte3 << 8) | byte2) << 8) | byte1) << 8) | byte0)
#define WBYTE(value, position) ((value >> (position * 8)) & 0xFF)
/* AES Constants */
// AES polynomial
const uint16_t POLYNOMIAL = 0b100011011;
// forward sbox
const uint8_t SBOX[256] = {
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
};
const uint8_t rCon[12] = {
0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,
};
/* AES state type */
typedef uint32_t t_state[4];
void hexprint16(uint8_t *p) {
for (int i = 0; i < 16; i++)
printf("%02hhx ", p[i]);
puts("");
}
// **************** AES functions ****************
uint32_t subWord(uint32_t w) {
return WORD(SBOX[WBYTE(w, 0)], SBOX[WBYTE(w, 1)], SBOX[WBYTE(w, 2)], SBOX[WBYTE(w, 3)]);
}
void subBytes(t_state s) {
for (uint8_t i = 0; i < 4; i++) {
s[i] = subWord(s[i]);
}
}
void shiftRows(t_state s) {
for (uint8_t i = 0; i < 4; i++) {
uint32_t mask = 0xFF << (i * 8);
for (uint8_t shiftCount = 0; shiftCount < i; shiftCount++) {
for (uint8_t currentByte = 0; currentByte < 3; currentByte++) {
// Swap s[currentByte] and s[currentByte + 1]
s[currentByte] = s[currentByte] ^ (mask & s[currentByte + 1]);
s[currentByte + 1] = s[currentByte + 1] ^ (mask & s[currentByte]);
s[currentByte] = s[currentByte] ^ (mask & s[currentByte + 1]);
}
}
}
}
uint8_t xtime(uint8_t a) {
uint8_t mask;
if (a & 0b10000000) {
mask = POLYNOMIAL & 0xFF;
}
else {
mask = 0x00;
}
return ((a << 1) ^ mask) & 0xFF;
}
// not mandatory - mix a single column
uint32_t mixColumn(uint32_t c) {
uint32_t result = c;
uint8_t *source = (uint8_t*)(&c);
uint8_t *target = (uint8_t*)(&result);
uint8_t base = *source ^ *(source + 1) ^ *(source + 2) ^ *(source + 3);
*target ^= base ^ xtime(*source ^ *(source + 1));
*(target + 1) ^= base ^ xtime(*(source + 1) ^ *(source + 2));
*(target + 2) ^= base ^ xtime(*(source + 2) ^ *(source + 3));
*(target + 3) ^= base ^ xtime(*(source + 3) ^ *source);
return result;
}
void mixColumns(t_state s) {
for (uint8_t i = 0; i < 4; i++) {
s[i] = mixColumn(s[i]);
}
}
/*
* Key expansion from 128bits (4*32b)
* to 11 round keys (11*4*32b)
* each round key is 4*32b
*/
// Taken from: https://www.brainkart.com/article/AES-Key-Expansion_8410/
void expandKey(uint8_t k[16], uint32_t ek[44]) {
for (uint8_t i = 0; i < 4; i++) {
ek[i] = WORD(k[i * 4], k[i * 4 + 1], k[i * 4 + 2], k[i * 4 + 3]);
}
for (uint8_t i = 4; i < 44; i++) {
uint32_t key = ek[i - 1];
if (i % 4 == 0) {
key = (key >> 8) | (key << 24);
key = subWord(key) ^ rCon[i / 4];
}
ek[i] = ek[i - 4] ^ key;
}
}
/* Adding expanded round key (prepared before) */
void addRoundKey(t_state s, uint32_t ek[], short round) {
s[0] ^= ek[round];
s[1] ^= ek[round + 1];
s[2] ^= ek[round + 2];
s[3] ^= ek[round + 3];
}
void aes(uint8_t *in, uint8_t *out, uint8_t *skey)
{
//... Initialize ...
unsigned short round = 0;
t_state state;
for (uint8_t i = 0; i < 4; i++) {
state[i] = WORD(in[i * 4], in[i * 4 + 1], in[i * 4 + 2], in[i * 4 + 3]);
}
uint32_t expKey[11 * 4];
expandKey(skey, expKey);
addRoundKey(state, expKey, 0);
for (int i = 1; i <= 10; i++) {
subBytes(state);
shiftRows(state);
if (i < 10) {
mixColumns(state);
}
addRoundKey(state, expKey, 4*i);
}
for (int i = 0; i < 16; i++) {
if (i < 4) out[i] = WBYTE(state[0], i % 4);
else if (i < 8) out[i] = WBYTE(state[1], i % 4);
else if (i < 12) out[i] = WBYTE(state[2], i % 4);
else out[i] = WBYTE(state[3], i % 4);
}
}
//****************************
// MAIN function: AES testing
//****************************
int main(int argc, char* argv[])
{
uint32_t cycles = 1000000;
uint8_t key[16] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff };
uint8_t in[16] = { 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67, 0x89};
if (argc > 2) {
std::cerr << "Invalid number of arguments\n";
exit(EXIT_FAILURE);
} else if (argc == 2) {
cycles = std::atoi(argv[1]);
}
const auto start{std::chrono::steady_clock::now()};
{
for (int i = 0; i < cycles; i++) {
aes(in, in, key);
}
}
const auto end{std::chrono::steady_clock::now()};
const std::chrono::duration<double> elapsed_seconds{end - start};
auto milliseconds = std::chrono::duration_cast<std::chrono::milliseconds>(elapsed_seconds).count();
std::cout << "AES (" << cycles << " runs)\nElapsed time: ";
std::cout << milliseconds << "ms\n"; // Before C++20
exit(in[0]);
}