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static int testx25519WithVectors(void) {

    int r = 0;

    uint8_t alice_sec[X25519_KEY_SIZE] = { /* 77076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c2a*/
        0x77, 0x07, 0x6d, 0x0a, 0x73, 0x18, 0xa5, 0x7d,
        0x3c, 0x16, 0xc1, 0x72, 0x51, 0xb2, 0x66, 0x45,
        0xdf, 0x4c, 0x2f, 0x87, 0xeb, 0xc0, 0x99, 0x2a,
        0xb1, 0x77, 0xfb, 0xa5, 0x1d, 0xb9, 0x2c, 0x2a
    };

    uint8_t alice_pub[X25519_KEY_SIZE] = { /* 8520f0098930a754748b7ddcb43ef75a0dbf3a0d26381af4eba4a98eaa9b4e6a*/
        0x85, 0x20, 0xf0, 0x09, 0x89, 0x30, 0xa7, 0x54,
        0x74, 0x8b, 0x7d, 0xdc, 0xb4, 0x3e, 0xf7, 0x5a,
        0x0d, 0xbf, 0x3a, 0x0d, 0x26, 0x38, 0x1a, 0xf4,
        0xeb, 0xa4, 0xa9, 0x8e, 0xaa, 0x9b, 0x4e, 0x6a
    };

    uint8_t bob_sec[X25519_KEY_SIZE] = { /* 5dab087e624a8a4b79e17f8b83800ee66f3bb1292618b6fd1c2f8b27ff88e0eb*/
        0x5d, 0xab, 0x08, 0x7e, 0x62, 0x4a, 0x8a, 0x4b,
        0x79, 0xe1, 0x7f, 0x8b, 0x83, 0x80, 0x0e, 0xe6,
        0x6f, 0x3b, 0xb1, 0x29, 0x26, 0x18, 0xb6, 0xfd,
        0x1c, 0x2f, 0x8b, 0x27, 0xff, 0x88, 0xe0, 0xeb
    };



    uint8_t bob_pub[X25519_KEY_SIZE] = { /* de9edb7d7b7dc1b4d35b61c2ece435373f8343c85b78674dadfc7e146f882b4f*/
        0xde, 0x9e, 0xdb, 0x7d, 0x7b, 0x7d, 0xc1, 0xb4,
        0xd3, 0x5b, 0x61, 0xc2, 0xec, 0xe4, 0x35, 0x37,
        0x3f, 0x83, 0x43, 0xc8, 0x5b, 0x78, 0x67, 0x4d,
        0xad, 0xfc, 0x7e, 0x14, 0x6f, 0x88, 0x2b, 0x4f
    };

    uint8_t expected_shared[X25519_KEY_SIZE] = { /* 4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742*/
        0x4a, 0x5d, 0x9d, 0x5b, 0xa4, 0xce, 0x2d, 0xe1,
        0x72, 0x8e, 0x3b, 0xf4, 0x80, 0x35, 0x0f, 0x25,
        0xe0, 0x7e, 0x21, 0xc9, 0x47, 0xd1, 0x9e, 0x33,
        0x76, 0xf0, 0x9b, 0x3c, 0x1e, 0x16, 0x17, 0x42
    };


    uint8_t shared1[X25519_SHARED_SIZE];
    uint8_t shared2[X25519_SHARED_SIZE];

    compact_x25519_shared(shared1, alice_sec, bob_pub);
    compact_x25519_shared(shared2, bob_sec, alice_pub);


    for (uint8_t i = 0; i < 32; i++)
    {
        printf("%02x", shared1[i]);
    } printf("\r\n");

    for (uint8_t i = 0; i < 32; i++)
    {
        printf("%02x", shared2[i]);
    } printf("\r\n");

    if (memcmp(shared1, shared2, X25519_SHARED_SIZE) != 0) {
        printf("Fail\n");
        r--;
    }

    if (memcmp(shared1, expected_shared, X25519_KEY_SIZE) != 0) {
        printf("Fail\n");
        r--;
    }

    return r;