SHA256_SHORT_BLOCK_LENGTH
if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) {
SHA256_SHORT_BLOCK_LENGTH - usedspace);
memset(context->buffer, 0, SHA256_SHORT_BLOCK_LENGTH);
memset(context->buffer, 0, SHA256_SHORT_BLOCK_LENGTH);
BE_64_TO_8(&context->buffer[SHA256_SHORT_BLOCK_LENGTH],