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(Unicode C) Load EC Public Key from X,Y ValuesDemonstrates how to load an EC public key from X and Y values.
#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; // 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); } |
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