Unicode C

Load EC Public Key from X,Y Values

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Demonstrates how to load an EC public key from X and Y values. Unicode C

#include <C_CkJsonObjectW.h>
#include <C_CkPublicKeyW.h>

void ChilkatSample(void)
    {
    BOOL success;
    const wchar_t *x;
    const wchar_t *y;
    HCkJsonObjectW json;
    HCkPublicKeyW pubkey;

    success = FALSE;

    // We have the following x and y values in base64 (for an EC point on the P-256 curve).
    x = L"Dn7uB1O7kgk74G6qfQwFJESeDnxO6lLjGZFWZJE16tw";
    y = L"iOWA5DInzK6nuUGvHJbMVq1Dpj248FqSV2teN3HzmhU";

    // Build a JWK that looks like this:

    // {
    //   "kty": "EC",
    //   "crv": "P-256",
    //   "x": "Dn7uB1O7kgk74G6qfQwFJESeDnxO6lLjGZFWZJE16tw",
    //   "y": "iOWA5DInzK6nuUGvHJbMVq1Dpj248FqSV2teN3HzmhU"
    // }

    json = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateString(json,L"kty",L"EC");
    CkJsonObjectW_UpdateString(json,L"crv",L"P-256");
    CkJsonObjectW_UpdateString(json,L"x",x);
    CkJsonObjectW_UpdateString(json,L"y",y);

    // Load from the JWK.
    pubkey = CkPublicKeyW_Create();
    success = CkPublicKeyW_LoadFromString(pubkey,CkJsonObjectW_emit(json));
    if (success == FALSE) {
        wprintf(L"%s\n",CkPublicKeyW_lastErrorText(pubkey));
        CkJsonObjectW_Dispose(json);
        CkPublicKeyW_Dispose(pubkey);
        return;
    }

    wprintf(L"Success.\n");


    CkJsonObjectW_Dispose(json);
    CkPublicKeyW_Dispose(pubkey);

    }