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Low memory version of Speck that combines key schedule with encryption

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This commit is contained in:
Rhys Weatherley
2015-12-17 19:06:41 +10:00
parent 32d3d59cfb
commit e046533aff
5 changed files with 644 additions and 23 deletions
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32
libraries/Crypto/examples/TestSpeck/TestSpeck.ino
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@@ -26,6 +26,7 @@ This example runs tests on the Speck implementation to verify correct behaviour.
#include <Crypto.h>
#include <Speck.h>
#include <SpeckLowMemory.h>
#include <string.h>
struct TestVector
@@ -69,10 +70,11 @@ static TestVector const testVectorSpeck256 = {
};
Speck speck;
SpeckLowMemory speckLowMemory;
byte buffer[16];
void testCipher(BlockCipher *cipher, const struct TestVector *test, size_t keySize)
void testCipher(BlockCipher *cipher, const struct TestVector *test, size_t keySize, bool decryption = true)
{
Serial.print(test->name);
Serial.print(" Encryption ... ");
@@ -83,6 +85,9 @@ void testCipher(BlockCipher *cipher, const struct TestVector *test, size_t keySi
else
Serial.println("Failed");
if (!decryption)
return;
Serial.print(test->name);
Serial.print(" Decryption ... ");
cipher->decryptBlock(buffer, test->ciphertext);
@@ -92,7 +97,7 @@ void testCipher(BlockCipher *cipher, const struct TestVector *test, size_t keySi
Serial.println("Failed");
}
void perfCipher(BlockCipher *cipher, const struct TestVector *test, size_t keySize)
void perfCipher(BlockCipher *cipher, const struct TestVector *test, size_t keySize, bool decryption = true)
{
unsigned long start;
unsigned long elapsed;
@@ -122,6 +127,11 @@ void perfCipher(BlockCipher *cipher, const struct TestVector *test, size_t keySi
Serial.print((16.0 * 5000.0 * 1000000.0) / elapsed);
Serial.println(" bytes per second");
if (!decryption) {
Serial.println();
return;
}
Serial.print(test->name);
Serial.print(" Decrypt ... ");
start = micros();
@@ -146,19 +156,33 @@ void setup()
Serial.println("State Sizes:");
Serial.print("Speck ... ");
Serial.println(sizeof(Speck));
Serial.print("SpeckLowMemory ... ");
Serial.println(sizeof(SpeckLowMemory));
Serial.println();
Serial.println("Test Vectors:");
Serial.println("Speck Test Vectors:");
testCipher(&speck, &testVectorSpeck128, 16);
testCipher(&speck, &testVectorSpeck192, 24);
testCipher(&speck, &testVectorSpeck256, 32);
Serial.println();
Serial.println("Performance Tests:");
Serial.println("SpeckLowMemory Test Vectors:");
testCipher(&speckLowMemory, &testVectorSpeck128, 16, false);
testCipher(&speckLowMemory, &testVectorSpeck192, 24, false);
testCipher(&speckLowMemory, &testVectorSpeck256, 32, false);
Serial.println();
Serial.println("Speck Performance Tests:");
perfCipher(&speck, &testVectorSpeck128, 16);
perfCipher(&speck, &testVectorSpeck192, 24);
perfCipher(&speck, &testVectorSpeck256, 32);
Serial.println("SpeckLowMemory Performance Tests:");
perfCipher(&speckLowMemory, &testVectorSpeck128, 16, false);
perfCipher(&speckLowMemory, &testVectorSpeck192, 24, false);
perfCipher(&speckLowMemory, &testVectorSpeck256, 32, false);
}
void loop()