/* * 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 CTR implementation to verify correct behaviour. */ #include #include #include #include #define MAX_PLAINTEXT_SIZE 36 #define MAX_CIPHERTEXT_SIZE 36 struct TestVector { const char *name; byte key[16]; byte plaintext[MAX_PLAINTEXT_SIZE]; byte ciphertext[MAX_CIPHERTEXT_SIZE]; byte iv[16]; size_t size; }; // Test vectors for AES-128 in CTR mode from RFC 3686. static TestVector const testVectorAES128CTR1 = { .name = "AES-128-CTR #1", .key = {0xAE, 0x68, 0x52, 0xF8, 0x12, 0x10, 0x67, 0xCC, 0x4B, 0xF7, 0xA5, 0x76, 0x55, 0x77, 0xF3, 0x9E}, .plaintext = {0x53, 0x69, 0x6E, 0x67, 0x6C, 0x65, 0x20, 0x62, 0x6C, 0x6F, 0x63, 0x6B, 0x20, 0x6D, 0x73, 0x67}, .ciphertext = {0xE4, 0x09, 0x5D, 0x4F, 0xB7, 0xA7, 0xB3, 0x79, 0x2D, 0x61, 0x75, 0xA3, 0x26, 0x13, 0x11, 0xB8}, .iv = {0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}, .size = 16 }; static TestVector const testVectorAES128CTR2 = { .name = "AES-128-CTR #2", .key = {0x7E, 0x24, 0x06, 0x78, 0x17, 0xFA, 0xE0, 0xD7, 0x43, 0xD6, 0xCE, 0x1F, 0x32, 0x53, 0x91, 0x63}, .plaintext = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F}, .ciphertext = {0x51, 0x04, 0xA1, 0x06, 0x16, 0x8A, 0x72, 0xD9, 0x79, 0x0D, 0x41, 0xEE, 0x8E, 0xDA, 0xD3, 0x88, 0xEB, 0x2E, 0x1E, 0xFC, 0x46, 0xDA, 0x57, 0xC8, 0xFC, 0xE6, 0x30, 0xDF, 0x91, 0x41, 0xBE, 0x28}, .iv = {0x00, 0x6C, 0xB6, 0xDB, 0xC0, 0x54, 0x3B, 0x59, 0xDA, 0x48, 0xD9, 0x0B, 0x00, 0x00, 0x00, 0x01}, .size = 32 }; static TestVector const testVectorAES128CTR3 = { .name = "AES-128-CTR #3", .key = {0x76, 0x91, 0xBE, 0x03, 0x5E, 0x50, 0x20, 0xA8, 0xAC, 0x6E, 0x61, 0x85, 0x29, 0xF9, 0xA0, 0xDC}, .plaintext = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23}, .ciphertext = {0xC1, 0xCF, 0x48, 0xA8, 0x9F, 0x2F, 0xFD, 0xD9, 0xCF, 0x46, 0x52, 0xE9, 0xEF, 0xDB, 0x72, 0xD7, 0x45, 0x40, 0xA4, 0x2B, 0xDE, 0x6D, 0x78, 0x36, 0xD5, 0x9A, 0x5C, 0xEA, 0xAE, 0xF3, 0x10, 0x53, 0x25, 0xB2, 0x07, 0x2F}, .iv = {0x00, 0xE0, 0x01, 0x7B, 0x27, 0x77, 0x7F, 0x3F, 0x4A, 0x17, 0x86, 0xF0, 0x00, 0x00, 0x00, 0x01}, .size = 36 }; CTR ctraes128; byte buffer[128]; bool testCipher_N(Cipher *cipher, const struct TestVector *test, size_t inc) { byte output[MAX_CIPHERTEXT_SIZE]; size_t posn, len; cipher->clear(); if (!cipher->setKey(test->key, cipher->keySize())) { Serial.print("setKey "); return false; } if (!cipher->setIV(test->iv, cipher->ivSize())) { Serial.print("setIV "); 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, cipher->keySize()); cipher->setIV(test->iv, cipher->ivSize()); 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(Cipher *cipher, const struct TestVector *test) { bool ok; Serial.print(test->name); Serial.print(" ... "); 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(const char *name, Cipher *cipher, const struct TestVector *test) { unsigned long start; unsigned long elapsed; int count; Serial.print(name); Serial.print(" ... "); cipher->setKey(test->key, cipher->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(const char *name, Cipher *cipher, const struct TestVector *test) { unsigned long start; unsigned long elapsed; int count; Serial.print(name); Serial.print(" ... "); cipher->setKey(test->key, cipher->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 setup() { Serial.begin(9600); Serial.println(); Serial.println("Test Vectors:"); testCipher(&ctraes128, &testVectorAES128CTR1); testCipher(&ctraes128, &testVectorAES128CTR2); testCipher(&ctraes128, &testVectorAES128CTR3); Serial.println(); Serial.println("Performance Tests:"); perfCipherEncrypt("AES-128-CTR Encrypt", &ctraes128, &testVectorAES128CTR1); perfCipherDecrypt("AES-128-CTR Decrypt", &ctraes128, &testVectorAES128CTR1); } void loop() { }