#include "endianess.h"
#include <assert.h>

void ladder(uint8_t shared_secret[32], const uint8_t *k, size_t len, const uint8_t pubkey[32]);

void test_ladder(void)
{
    uint8_t scalar[32] = "\xa5\x46\xe3\x6b\xf0\x52\x7c\x9d\x3b\x16\x15\x4b\x82\x46\x5e\xdd\x62\x14\x4c\x0a\xc1\xfc\x5a\x18\x50\x6a\x22\x44\xba\x44\x9a\xc4";
    uint8_t pubkey[32] = "\xe6\xdb\x68\x67\x58\x30\x30\xdb\x35\x94\xc1\xa4\x24\xb1\x5f\x7c\x72\x66\x24\xec\x26\xb3\x35\x3b\x10\xa9\x03\xa6\xd0\xab\x1c\x4c";
    uint8_t expout[32] = "\xc3\xda\x55\x37\x9d\xe9\xc6\x90\x8e\x94\xea\x4d\xf2\x8d\x08\x4f\x32\xec\xcf\x03\x49\x1c\x71\xf7\x54\xb4\x07\x55\x77\xa2\x85\x52";
    uint8_t out[32];

    scalar[0] &= 248;
    scalar[31] &= 127;
    scalar[31] |= 64;
    ladder(out, scalar, 32, pubkey);
    assert(0 == memcmp(out, expout, 32));
}

int main(void)
{
    test_ladder();
    return 0;
}