C

Generate an Ed25519 Key Pair

See more Ed25519 Examples

Demonstrates how to generate a new Ed25519 public/private key pair.

Note: This example requires Chilkat v9.5.0.83 or greater.

C

#include <C_CkEdDSA.h>
#include <C_CkPrng.h>
#include <C_CkPrivateKey.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkEdDSA eddsa;
    HCkPrng prng;
    HCkPrivateKey privKey;
    const char *jwk;
    HCkJsonObject json;

    success = FALSE;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    eddsa = CkEdDSA_Create();
    prng = CkPrng_Create();
    privKey = CkPrivateKey_Create();

    // Generates a new eddsa key and stores it in privKey.
    success = CkEdDSA_GenEd25519Key(eddsa,prng,privKey);
    if (success == FALSE) {
        printf("%s\n",CkEdDSA_lastErrorText(eddsa));
        CkEdDSA_Dispose(eddsa);
        CkPrng_Dispose(prng);
        CkPrivateKey_Dispose(privKey);
        return;
    }

    // Examine the ed25519 key in JWK format;
    jwk = CkPrivateKey_getJwk(privKey);

    json = CkJsonObject_Create();
    CkJsonObject_Load(json,jwk);
    CkJsonObject_putEmitCompact(json,FALSE);
    printf("%s\n",CkJsonObject_emit(json));

    // Sample output:
    // {
    //   "kty": "OKP",
    //   "crv": "Ed25519",
    //   "x": "SE2Kne5xt51z1eciMH2T2ftDQp96Gl6FhY6zSQujiP0",
    //   "d": "O-eRXewadF0sNyB0U9omcnt8Qg2ZmeK3WSXPYgqe570",
    //   "use": "sig"
    // }

    // In the above JWK, x is the public key, y is the private key.
    // Both are 32 bytes and are base64-url encoded.


    CkEdDSA_Dispose(eddsa);
    CkPrng_Dispose(prng);
    CkPrivateKey_Dispose(privKey);
    CkJsonObject_Dispose(json);

    }