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Random number generator class based on ChaCha

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This commit is contained in:
Rhys Weatherley
2015-03-01 12:08:35 +10:00
parent 4fc27f1005
commit 6ec1b93cf9
14 changed files with 1410 additions and 24 deletions
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45
libraries/Crypto/examples/TestChaCha/TestChaCha.ino
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@@ -27,6 +27,7 @@ This example runs tests on the ChaCha implementation to verify correct behaviour
#include <Crypto.h>
#include <ChaCha.h>
#include <string.h>
#include <avr/pgmspace.h>
#define MAX_PLAINTEXT_SIZE 64
#define MAX_CIPHERTEXT_SIZE 64
@@ -50,7 +51,7 @@ struct TestVector
// 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 = {
static TestVector const testVectorChaCha20_128 PROGMEM = {
.name = "ChaCha20 128-bit",
.key = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
.keySize = 16,
@@ -76,7 +77,7 @@ static TestVector const testVectorChaCha20_128 = {
.size = 64
};
static TestVector const testVectorChaCha20_256 = {
static TestVector const testVectorChaCha20_256 PROGMEM = {
.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,
@@ -104,7 +105,7 @@ static TestVector const testVectorChaCha20_256 = {
.size = 64
};
static TestVector const testVectorChaCha12_128 = {
static TestVector const testVectorChaCha12_128 PROGMEM = {
.name = "ChaCha12 128-bit",
.key = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
.keySize = 16,
@@ -130,7 +131,7 @@ static TestVector const testVectorChaCha12_128 = {
.size = 64
};
static TestVector const testVectorChaCha12_256 = {
static TestVector const testVectorChaCha12_256 PROGMEM = {
.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,
@@ -158,7 +159,7 @@ static TestVector const testVectorChaCha12_256 = {
.size = 64
};
static TestVector const testVectorChaCha8_128 = {
static TestVector const testVectorChaCha8_128 PROGMEM = {
.name = "ChaCha8 128-bit",
.key = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
.keySize = 16,
@@ -184,7 +185,7 @@ static TestVector const testVectorChaCha8_128 = {
.size = 64
};
static TestVector const testVectorChaCha8_256 = {
static TestVector const testVectorChaCha8_256 PROGMEM = {
.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,
@@ -212,6 +213,8 @@ static TestVector const testVectorChaCha8_256 = {
.size = 64
};
TestVector testVector;
ChaCha chacha;
byte buffer[128];
@@ -272,6 +275,9 @@ void testCipher(ChaCha *cipher, const struct TestVector *test)
{
bool ok;
memcpy_P(&testVector, test, sizeof(TestVector));
test = &testVector;
Serial.print(test->name);
Serial.print(" ... ");
@@ -291,20 +297,15 @@ void testCipher(ChaCha *cipher, const struct TestVector *test)
Serial.println("Failed");
}
// The data space of this sketch is too big if we try to test the
// performance of all of setKey(), encrypt(), and decrypt().
// Since decryption is almost identical to encryption, only test
// that if the PERF_DECRYPT option is enabled, suppressing setKey().
//#define PERF_DECRYPT 1
#if !defined(PERF_DECRYPT)
void perfCipherSetKey(ChaCha *cipher, const struct TestVector *test)
{
unsigned long start;
unsigned long elapsed;
int count;
memcpy_P(&testVector, test, sizeof(TestVector));
test = &testVector;
Serial.print(test->name);
Serial.print(" SetKey ... ");
@@ -322,14 +323,15 @@ void perfCipherSetKey(ChaCha *cipher, const struct TestVector *test)
Serial.println(" per second");
}
#endif
void perfCipherEncrypt(ChaCha *cipher, const struct TestVector *test)
{
unsigned long start;
unsigned long elapsed;
int count;
memcpy_P(&testVector, test, sizeof(TestVector));
test = &testVector;
Serial.print(test->name);
Serial.print(" Encrypt ... ");
@@ -348,14 +350,15 @@ void perfCipherEncrypt(ChaCha *cipher, const struct TestVector *test)
Serial.println(" bytes per second");
}
#if defined(PERF_DECRYPT)
void perfCipherDecrypt(ChaCha *cipher, const struct TestVector *test)
{
unsigned long start;
unsigned long elapsed;
int count;
memcpy_P(&testVector, test, sizeof(TestVector));
test = &testVector;
Serial.print(test->name);
Serial.print(" Decrypt ... ");
@@ -374,17 +377,11 @@ void perfCipherDecrypt(ChaCha *cipher, const struct TestVector *test)
Serial.println(" bytes per second");
}
#endif
void perfCipher(ChaCha *cipher, const struct TestVector *test)
{
#if !defined(PERF_DECRYPT)
perfCipherSetKey(cipher, test);
perfCipherEncrypt(cipher, test);
#else
perfCipherEncrypt(cipher, test);
perfCipherDecrypt(cipher, test);
#endif
}
void setup()