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arduinolibs/libraries/Crypto/examples/TestChaCha/TestChaCha.ino
Rhys Weatherley 07a47cdcf1 ChaCha stream cipher
2015-01-02 08:51:46 +10:00

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/*
* Copyright (C) 2015 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/*
This example runs tests on the ChaCha implementation to verify correct behaviour.
*/
#include <Crypto.h>
#include <ChaCha.h>
#include <string.h>
#define MAX_PLAINTEXT_SIZE 64
#define MAX_CIPHERTEXT_SIZE 64
struct TestVector
{
const char *name;
byte key[32];
size_t keySize;
uint8_t rounds;
byte plaintext[MAX_PLAINTEXT_SIZE];
byte ciphertext[MAX_CIPHERTEXT_SIZE];
byte iv[8];
byte counter[8];
size_t size;
};
// Use the test vectors from section 9 of the Salsa20 specification,
// http://cr.yp.to/snuffle/spec.pdf, but modify the ciphertext to
// the expected output from ChaCha20/12/8. Unfortunately the ChaCha
// specification doesn't contain test vectors - these were generated
// using the reference implementation from http://cr.yp.to/chacha.html.
static TestVector const testVectorChaCha20_128 = {
.name = "ChaCha20 128-bit",
.key = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
.keySize = 16,
.rounds = 20,
.plaintext = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
.ciphertext = {0x1C, 0x91, 0xE7, 0x99, 0x71, 0xC0, 0x1C, 0x2A,
0xEC, 0xE9, 0x24, 0x35, 0xB1, 0x6E, 0xBF, 0xFD,
0x33, 0x05, 0xCC, 0x17, 0x24, 0x9D, 0x66, 0xA7,
0xA0, 0xCA, 0xB8, 0x36, 0x03, 0xA6, 0x9D, 0x93,
0x9A, 0x4C, 0x10, 0x40, 0xD9, 0x2A, 0x86, 0x78,
0x3A, 0xAD, 0x71, 0x87, 0x55, 0x9F, 0x5B, 0x9A,
0x68, 0x52, 0xA0, 0xAD, 0x59, 0xAE, 0x04, 0x10,
0x25, 0x74, 0x5C, 0x05, 0x62, 0x78, 0xF4, 0x8A},
.iv = {101,102,103,104,105,106,107,108},
.counter = {109, 110, 111, 112, 113, 114, 115, 116},
.size = 64
};
static TestVector const testVectorChaCha20_256 = {
.name = "ChaCha20 256-bit",
.key = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
201, 202, 203, 204, 205, 206, 207, 208, 209, 210,
211, 212, 213, 214, 215, 216},
.keySize = 32,
.rounds = 20,
.plaintext = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
.ciphertext = {0x2A, 0x7E, 0x73, 0xC2, 0x2A, 0xE5, 0xCF, 0x4E,
0x21, 0x75, 0xB1, 0x26, 0x38, 0x3F, 0x60, 0x84,
0x11, 0x25, 0xFC, 0xAD, 0xFD, 0x16, 0x54, 0xF2,
0xD7, 0x8C, 0x5D, 0x49, 0x8D, 0x96, 0xBE, 0x15,
0xC9, 0x00, 0x12, 0x09, 0x14, 0x43, 0x2D, 0x6D,
0x64, 0x33, 0x88, 0xA6, 0x16, 0x39, 0x86, 0xFD,
0xD8, 0x85, 0x4D, 0x76, 0x42, 0xEC, 0x0A, 0x0C,
0x8A, 0xF2, 0x99, 0x2E, 0x54, 0xAE, 0xB4, 0xD9},
.iv = {101,102,103,104,105,106,107,108},
.counter = {109, 110, 111, 112, 113, 114, 115, 116},
.size = 64
};
static TestVector const testVectorChaCha12_128 = {
.name = "ChaCha12 128-bit",
.key = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
.keySize = 16,
.rounds = 12,
.plaintext = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
.ciphertext = {0xCB, 0xC1, 0xCF, 0x63, 0xE8, 0xD0, 0x62, 0x83,
0xFC, 0x12, 0x87, 0x8C, 0x62, 0x09, 0x5B, 0xF8,
0x84, 0x93, 0x30, 0xC6, 0xE6, 0x26, 0x87, 0x99,
0xB0, 0xD9, 0xC1, 0xE1, 0xD7, 0x58, 0xCA, 0x05,
0xFE, 0x46, 0x40, 0xD1, 0xDC, 0x14, 0x68, 0x3C,
0xFF, 0x25, 0xF7, 0x70, 0x5F, 0xBF, 0x37, 0xC5,
0x29, 0x8F, 0x3C, 0x55, 0x74, 0xDF, 0xF7, 0x49,
0x8D, 0xD8, 0xE9, 0xBA, 0x5D, 0xF1, 0x9F, 0xA5},
.iv = {101,102,103,104,105,106,107,108},
.counter = {109, 110, 111, 112, 113, 114, 115, 116},
.size = 64
};
static TestVector const testVectorChaCha12_256 = {
.name = "ChaCha12 256-bit",
.key = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
201, 202, 203, 204, 205, 206, 207, 208, 209, 210,
211, 212, 213, 214, 215, 216},
.keySize = 32,
.rounds = 12,
.plaintext = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
.ciphertext = {0xB8, 0x49, 0xD4, 0x70, 0xE0, 0xFF, 0x57, 0x12,
0x95, 0xBF, 0xD9, 0xCD, 0x26, 0xFD, 0x4D, 0x6E,
0x70, 0xA2, 0xBC, 0x58, 0x63, 0xF6, 0x2C, 0xC3,
0xC7, 0x1C, 0x9B, 0x1A, 0x54, 0xDC, 0xF9, 0xF8,
0xFD, 0x59, 0xEA, 0xC9, 0xC3, 0x10, 0xA1, 0xDE,
0xD1, 0x53, 0x84, 0xD6, 0x8D, 0xC6, 0x61, 0x09,
0x2E, 0x62, 0x14, 0xC5, 0x77, 0x4B, 0x6B, 0x5B,
0x0D, 0x35, 0xE6, 0x17, 0x41, 0x51, 0xA6, 0xA4},
.iv = {101,102,103,104,105,106,107,108},
.counter = {109, 110, 111, 112, 113, 114, 115, 116},
.size = 64
};
static TestVector const testVectorChaCha8_128 = {
.name = "ChaCha8 128-bit",
.key = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
.keySize = 16,
.rounds = 8,
.plaintext = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
.ciphertext = {0x76, 0x42, 0x84, 0xB4, 0x87, 0x1F, 0x54, 0xAE,
0x33, 0xBF, 0x79, 0x3C, 0xE2, 0x78, 0x5B, 0x4D,
0xE7, 0x90, 0xF3, 0x8C, 0xB8, 0xF4, 0xA1, 0x56,
0x87, 0x8B, 0x54, 0x06, 0xBE, 0x5A, 0x1B, 0x1C,
0x30, 0x31, 0xD3, 0xCD, 0x90, 0x34, 0xC8, 0x93,
0x2C, 0x0A, 0x5E, 0xC9, 0x4A, 0x1A, 0x66, 0x4C,
0x28, 0x94, 0xA9, 0x61, 0xBB, 0xB4, 0xF0, 0x2D,
0x59, 0x73, 0x9F, 0xC9, 0xF1, 0xF0, 0x66, 0x05},
.iv = {101,102,103,104,105,106,107,108},
.counter = {109, 110, 111, 112, 113, 114, 115, 116},
.size = 64
};
static TestVector const testVectorChaCha8_256 = {
.name = "ChaCha8 256-bit",
.key = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
201, 202, 203, 204, 205, 206, 207, 208, 209, 210,
211, 212, 213, 214, 215, 216},
.keySize = 32,
.rounds = 8,
.plaintext = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
.ciphertext = {0x38, 0x0F, 0x75, 0xD6, 0x32, 0xF8, 0xBB, 0x2C,
0x44, 0x81, 0xF4, 0x27, 0x90, 0xB8, 0xAA, 0xE3,
0x09, 0xD1, 0xB9, 0x55, 0xC2, 0xF5, 0x85, 0x27,
0xBB, 0x8F, 0x43, 0x00, 0x68, 0x2B, 0x2A, 0x1B,
0x7A, 0xC1, 0x5B, 0xC3, 0xA3, 0xFF, 0x29, 0xC9,
0xD2, 0x95, 0x98, 0xF6, 0x3C, 0xAC, 0x9B, 0x2C,
0xA3, 0xF1, 0x40, 0x1E, 0xFA, 0x7C, 0xAC, 0xA3,
0xB1, 0x61, 0x27, 0x50, 0xBB, 0x03, 0x24, 0x36},
.iv = {101,102,103,104,105,106,107,108},
.counter = {109, 110, 111, 112, 113, 114, 115, 116},
.size = 64
};
ChaCha chacha;
byte buffer[128];
bool testCipher_N(ChaCha *cipher, const struct TestVector *test, size_t inc)
{
byte output[MAX_CIPHERTEXT_SIZE];
size_t posn, len;
cipher->clear();
if (!cipher->setKey(test->key, test->keySize)) {
Serial.print("setKey ");
return false;
}
if (!cipher->setIV(test->iv, cipher->ivSize())) {
Serial.print("setIV ");
return false;
}
if (!cipher->setCounter(test->counter, 8)) {
Serial.print("setCounter ");
return false;
}
memset(output, 0xBA, sizeof(output));
for (posn = 0; posn < test->size; posn += inc) {
len = test->size - posn;
if (len > inc)
len = inc;
cipher->encrypt(output + posn, test->plaintext + posn, len);
}
if (memcmp(output, test->ciphertext, test->size) != 0) {
Serial.print(output[0], HEX);
Serial.print("->");
Serial.print(test->ciphertext[0], HEX);
return false;
}
cipher->setKey(test->key, test->keySize);
cipher->setIV(test->iv, cipher->ivSize());
cipher->setCounter(test->counter, 8);
for (posn = 0; posn < test->size; posn += inc) {
len = test->size - posn;
if (len > inc)
len = inc;
cipher->decrypt(output + posn, test->ciphertext + posn, len);
}
if (memcmp(output, test->plaintext, test->size) != 0)
return false;
return true;
}
void testCipher(ChaCha *cipher, const struct TestVector *test)
{
bool ok;
Serial.print(test->name);
Serial.print(" ... ");
cipher->setNumRounds(test->rounds);
ok = testCipher_N(cipher, test, test->size);
ok &= testCipher_N(cipher, test, 1);
ok &= testCipher_N(cipher, test, 2);
ok &= testCipher_N(cipher, test, 5);
ok &= testCipher_N(cipher, test, 8);
ok &= testCipher_N(cipher, test, 13);
ok &= testCipher_N(cipher, test, 16);
if (ok)
Serial.println("Passed");
else
Serial.println("Failed");
}
void perfCipherEncrypt(ChaCha *cipher, const struct TestVector *test)
{
unsigned long start;
unsigned long elapsed;
int count;
Serial.print(test->name);
Serial.print(" Encrypt ... ");
cipher->setNumRounds(test->rounds);
cipher->setKey(test->key, test->keySize);
cipher->setIV(test->iv, cipher->ivSize());
start = micros();
for (count = 0; count < 500; ++count) {
cipher->encrypt(buffer, buffer, sizeof(buffer));
}
elapsed = micros() - start;
Serial.print(elapsed / (sizeof(buffer) * 500.0));
Serial.print("us per byte, ");
Serial.print((sizeof(buffer) * 500.0 * 1000000.0) / elapsed);
Serial.println(" bytes per second");
}
void perfCipherDecrypt(ChaCha *cipher, const struct TestVector *test)
{
unsigned long start;
unsigned long elapsed;
int count;
Serial.print(test->name);
Serial.print(" Decrypt ... ");
cipher->setNumRounds(test->rounds);
cipher->setKey(test->key, test->keySize);
cipher->setIV(test->iv, cipher->ivSize());
start = micros();
for (count = 0; count < 500; ++count) {
cipher->decrypt(buffer, buffer, sizeof(buffer));
}
elapsed = micros() - start;
Serial.print(elapsed / (sizeof(buffer) * 500.0));
Serial.print("us per byte, ");
Serial.print((sizeof(buffer) * 500.0 * 1000000.0) / elapsed);
Serial.println(" bytes per second");
}
void perfCipher(ChaCha *cipher, const struct TestVector *test)
{
perfCipherEncrypt(cipher, test);
perfCipherDecrypt(cipher, test);
}
void setup()
{
Serial.begin(9600);
Serial.println();
Serial.println("Test Vectors:");
testCipher(&chacha, &testVectorChaCha20_128);
testCipher(&chacha, &testVectorChaCha20_256);
testCipher(&chacha, &testVectorChaCha12_128);
testCipher(&chacha, &testVectorChaCha12_256);
testCipher(&chacha, &testVectorChaCha8_128);
testCipher(&chacha, &testVectorChaCha8_256);
Serial.println();
Serial.println("Performance Tests:");
perfCipher(&chacha, &testVectorChaCha20_128);
perfCipher(&chacha, &testVectorChaCha20_256);
perfCipher(&chacha, &testVectorChaCha12_128);
perfCipher(&chacha, &testVectorChaCha12_256);
perfCipher(&chacha, &testVectorChaCha8_128);
perfCipher(&chacha, &testVectorChaCha8_256);
}
void loop()
{
}
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