static void
_test_salsa20(salsa20_func *crypt,
const struct tstring *key,
const struct tstring *iv,
const struct tstring *cleartext,
const struct tstring *ciphertext)
{
struct salsa20_ctx ctx;
uint8_t *data;
unsigned length;
ASSERT (cleartext->length == ciphertext->length);
length = cleartext->length;
ASSERT (iv->length == SALSA20_IV_SIZE);
data = xalloc(length + 1);
salsa20_set_key(&ctx, key->length, key->data);
salsa20_set_iv(&ctx, iv->data);
data[length] = 17;
crypt(&ctx, length, data, cleartext->data);
if (data[length] != 17)
{
fprintf(stderr, "Encrypt of %u bytes wrote too much!\nInput:", length);
tstring_print_hex(cleartext);
fprintf(stderr, "\n");
FAIL();
}
if (!MEMEQ(length, data, ciphertext->data))
{
fprintf(stderr, "Encrypt failed:\nInput:");
tstring_print_hex(cleartext);
fprintf(stderr, "\nOutput: ");
print_hex(length, data);
fprintf(stderr, "\nExpected:");
tstring_print_hex(ciphertext);
fprintf(stderr, "\n");
FAIL();
}
salsa20_set_key(&ctx, key->length, key->data);
salsa20_set_iv(&ctx, iv->data);
crypt(&ctx, length, data, data);
if (!MEMEQ(length, data, cleartext->data))
{
fprintf(stderr, "Decrypt failed:\nInput:");
tstring_print_hex(ciphertext);
fprintf(stderr, "\nOutput: ");
print_hex(length, data);
fprintf(stderr, "\nExpected:");
tstring_print_hex(cleartext);
fprintf(stderr, "\n");
FAIL();
}
free(data);
}
static void
test_salsa20(unsigned key_length,
const uint8_t *key,
const uint8_t *iv,
unsigned length,
const uint8_t *cleartext,
const uint8_t *ciphertext)
{
struct salsa20_ctx ctx;
uint8_t *data = xalloc(length + 1);
salsa20_set_key(&ctx, key_length, key);
salsa20_set_iv(&ctx, iv);
data[length] = 17;
salsa20_crypt(&ctx, length, data, cleartext);
if (data[length] != 17)
{
fprintf(stderr, "Encrypt of %u bytes wrote too much!\nInput:", length);
print_hex(length, cleartext);
fprintf(stderr, "\n");
FAIL();
}
if (!MEMEQ(length, data, ciphertext))
{
fprintf(stderr, "Encrypt failed:\nInput:");
print_hex(length, cleartext);
fprintf(stderr, "\nOutput: ");
print_hex(length, data);
fprintf(stderr, "\nExpected:");
print_hex(length, ciphertext);
fprintf(stderr, "\n");
FAIL();
}
salsa20_set_key(&ctx, key_length, key);
salsa20_set_iv(&ctx, iv);
salsa20_crypt(&ctx, length, data, data);
if (!MEMEQ(length, data, cleartext))
{
fprintf(stderr, "Decrypt failed:\nInput:");
print_hex(length, ciphertext);
fprintf(stderr, "\nOutput: ");
print_hex(length, data);
fprintf(stderr, "\nExpected:");
print_hex(length, cleartext);
fprintf(stderr, "\n");
FAIL();
}
free(data);
}
/* Initializes the nonce level random generator.
*
* the @nonce_key must be provided.
*
* @init must be non zero on first initialization, and
* zero on any subsequent reinitializations.
*/
static int nonce_rng_init(struct nonce_ctx_st *ctx,
uint8_t nonce_key[NONCE_KEY_SIZE],
unsigned nonce_key_size,
unsigned init)
{
uint8_t iv[8];
int ret;
if (init == 0) {
/* use the previous key to generate IV as well */
memset(iv, 0, sizeof(iv)); /* to prevent valgrind from whinning */
salsa20r12_crypt(&ctx->ctx, sizeof(iv), iv, iv);
/* Add key continuity by XORing the new key with data generated
* from the old key */
salsa20r12_crypt(&ctx->ctx, nonce_key_size, nonce_key, nonce_key);
} else {
ctx->forkid = _gnutls_get_forkid();
/* when initializing read the IV from the system randomness source */
ret = _rnd_get_system_entropy(iv, sizeof(iv));
if (ret < 0)
return gnutls_assert_val(ret);
}
salsa20_set_key(&ctx->ctx, nonce_key_size, nonce_key);
salsa20_set_iv(&ctx->ctx, iv);
zeroize_key(nonce_key, nonce_key_size);
ctx->counter = 0;
return 0;
}
static int
wrap_nettle_cipher_setiv(void *_ctx, const void *iv, size_t ivsize)
{
struct nettle_cipher_ctx *ctx = _ctx;
switch (ctx->algo) {
case GNUTLS_CIPHER_AES_128_GCM:
case GNUTLS_CIPHER_AES_256_GCM:
gcm_aes_set_iv(&ctx->ctx.aes_gcm,
ivsize, iv);
break;
case GNUTLS_CIPHER_CAMELLIA_128_GCM:
case GNUTLS_CIPHER_CAMELLIA_256_GCM:
_gcm_camellia_set_iv(&ctx->ctx.camellia_gcm,
ivsize, iv);
break;
case GNUTLS_CIPHER_SALSA20_256:
case GNUTLS_CIPHER_ESTREAM_SALSA20_256:
if (ivsize != SALSA20_IV_SIZE)
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
salsa20_set_iv(&ctx->ctx.salsa20, iv);
break;
default:
if (ivsize > ctx->block_size)
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
memcpy(ctx->iv, iv, ivsize);
}
return 0;
}
static void
test_salsa20_stream(const struct tstring *key,
const struct tstring *iv,
const struct tstring *ciphertext,
const struct tstring *xor_ref)
{
struct salsa20_ctx ctx;
uint8_t data[STREAM_LENGTH + 1];
uint8_t stream[STREAM_LENGTH + 1];
uint8_t xor[SALSA20_BLOCK_SIZE];
unsigned j;
ASSERT (iv->length == SALSA20_IV_SIZE);
ASSERT (ciphertext->length == 4*SALSA20_BLOCK_SIZE);
ASSERT (xor_ref->length == SALSA20_BLOCK_SIZE);
salsa20_set_key(&ctx, key->length, key->data);
salsa20_set_iv(&ctx, iv->data);
memset(stream, 0, STREAM_LENGTH + 1);
salsa20_crypt(&ctx, STREAM_LENGTH, stream, stream);
if (stream[STREAM_LENGTH])
{
fprintf(stderr, "Stream of %d bytes wrote too much!\n", STREAM_LENGTH);
FAIL();
}
if (!MEMEQ (64, stream, ciphertext->data))
{
fprintf(stderr, "Error failed, offset 0:\n");
fprintf(stderr, "\nOutput: ");
print_hex(64, stream);
fprintf(stderr, "\nExpected:");
print_hex(64, ciphertext->data);
fprintf(stderr, "\n");
FAIL();
}
if (!MEMEQ (128, stream + 192, ciphertext->data + 64))
{
fprintf(stderr, "Error failed, offset 192:\n");
fprintf(stderr, "\nOutput: ");
print_hex(128, stream + 192);
fprintf(stderr, "\nExpected:");
print_hex(64, ciphertext->data + 64);
fprintf(stderr, "\n");
FAIL();
}
if (!MEMEQ (64, stream + 448, ciphertext->data + 192))
{
fprintf(stderr, "Error failed, offset 448:\n");
fprintf(stderr, "\nOutput: ");
print_hex(64, stream + 448);
fprintf(stderr, "\nExpected:");
print_hex(64, ciphertext->data + 192);
fprintf(stderr, "\n");
FAIL();
}
memxor3 (xor, stream, stream + SALSA20_BLOCK_SIZE, SALSA20_BLOCK_SIZE);
for (j = 2*SALSA20_BLOCK_SIZE; j < STREAM_LENGTH; j += SALSA20_BLOCK_SIZE)
memxor (xor, stream + j, SALSA20_BLOCK_SIZE);
if (!MEMEQ (SALSA20_BLOCK_SIZE, xor, xor_ref->data))
{
fprintf(stderr, "Error failed, bad xor 448:\n");
fprintf(stderr, "\nOutput: ");
print_hex(SALSA20_BLOCK_SIZE, xor);
fprintf(stderr, "\nExpected:");
print_hex(SALSA20_BLOCK_SIZE, xor_ref->data);
fprintf(stderr, "\n");
FAIL();
}
for (j = 1; j <= STREAM_LENGTH; j++)
{
memset(data, 0, STREAM_LENGTH + 1);
salsa20_set_iv(&ctx, iv->data);
salsa20_crypt(&ctx, j, data, data);
if (!MEMEQ(j, data, stream))
{
fprintf(stderr, "Encrypt failed for length %u:\n", j);
fprintf(stderr, "\nOutput: ");
print_hex(j, data);
fprintf(stderr, "\nExpected:");
print_hex(j, stream);
fprintf(stderr, "\n");
FAIL();
}
if (!memzero_p (data + j, STREAM_LENGTH + 1 - j))
{
fprintf(stderr, "Encrypt failed for length %u, wrote too much:\n", j);
fprintf(stderr, "\nOutput: ");
print_hex(STREAM_LENGTH + 1 - j, data + j);
fprintf(stderr, "\n");
FAIL();
}
}
}
