static void
cipher_process(xsMachine *the, kcl_symmetric_direction_t direction)
{
crypt_cipher_t *cipher = xsGetHostData(xsThis);
size_t len;
void *indata, *outdata;
if (cipher->keysched != NULL) {
if (cipher->direction != direction) {
(*cipher->keysched)(cipher->ctx, direction);
cipher->direction = direction;
}
}
if (xsToInteger(xsArgc) > 1 && xsTest(xsArg(1))) {
if (xsGetArrayBufferLength(xsArg(1)) < (xsIntegerValue)cipher->blockSize)
crypt_throw_error(the, "cipher: too small buffer");
xsResult = xsArg(1);
}
else
xsResult = xsArrayBuffer(NULL, cipher->blockSize);
if (xsTypeOf(xsArg(0)) == xsStringType) {
indata = xsToString(xsArg(0));
len = c_strlen(indata);
}
else {
indata = xsToArrayBuffer(xsArg(0));
len = xsGetArrayBufferLength(xsArg(0));
}
if (len < cipher->blockSize)
crypt_throw_error(the, "cipher: wrong size");
outdata = xsToArrayBuffer(xsResult);
(*cipher->process)(cipher->ctx, indata, outdata);
}
void
xs_stream_encrypt(xsMachine *the)
{
crypt_stream_t *stream = xsGetHostData(xsThis);
int ac = xsToInteger(xsArgc);
size_t len;
void *indata, *outdata;
if (xsTypeOf(xsArg(0)) == xsStringType)
len = c_strlen(xsToString(xsArg(0)));
else
len = xsGetArrayBufferLength(xsArg(0));
if (ac > 2 && xsTypeOf(xsArg(2)) != xsUndefinedType) {
size_t n = xsToInteger(xsArg(2));
if (n < len)
len = n;
}
if (ac > 1 && xsTest(xsArg(1))) {
if (xsGetArrayBufferLength(xsArg(1)) < (xsIntegerValue)len)
crypt_throw_error(the, "too small buffer");
xsResult = xsArg(1);
}
else
xsResult = xsArrayBuffer(NULL, len);
if (xsTypeOf(xsArg(0)) == xsStringType)
indata = xsToString(xsArg(0));
else
indata = xsToArrayBuffer(xsArg(0));
outdata = xsToArrayBuffer(xsResult);
(*stream->process)(stream->ctx, indata, outdata, len);
}
void
xs_stream_constructor(xsMachine *the)
{
crypt_stream_t *stream;
if ((stream = crypt_malloc(sizeof(crypt_stream_t))) == NULL)
crypt_throw_error(the, "stream: nomem");
c_memset(stream, 0, sizeof(crypt_stream_t));
xsSetHostData(xsThis, stream);
}
void
xs_digest_constructor(xsMachine *the)
{
crypt_digest_t *digest;
if ((digest = crypt_malloc(sizeof(crypt_digest_t))) == NULL)
crypt_throw_error(the, "digest: nomem");
memset(digest, 0, sizeof(crypt_digest_t));
xsSetHostData(xsThis, digest);
}
void
xs_cipher_constructor(xsMachine *the)
{
crypt_cipher_t *cipher;
if ((cipher = crypt_malloc(sizeof(crypt_cipher_t))) == NULL)
crypt_throw_error(the, "cipher: nomem");
c_memset(cipher, 0, sizeof(crypt_cipher_t));
cipher->direction = -1;
xsSetHostData(xsThis, cipher);
}
