C

Generate an ECC Key (Public and Private)

See more ECC Examples

Demonstrates how to generate an ECC key and save both public and private parts. C

#include <C_CkPrng.h>
#include <C_CkEcc.h>
#include <C_CkPrivateKey.h>
#include <C_CkPublicKey.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkPrng fortuna;
    const char *entropy;
    HCkEcc ecc;
    HCkPrivateKey privKey;
    HCkPublicKey pubKey;
    BOOL bPreferPkcs1;

    success = FALSE;

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

    // Create a Fortuna PRNG and seed it with system entropy.
    // This will be our source of random data for generating the ECC private key.
    fortuna = CkPrng_Create();
    entropy = CkPrng_getEntropy(fortuna,32,"base64");
    success = CkPrng_AddEntropy(fortuna,entropy,"base64");

    ecc = CkEcc_Create();

    // Generate a random ECC private key on the secp256r1 curve.
    // Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256k1.

    privKey = CkPrivateKey_Create();
    success = CkEcc_GenKey(ecc,"secp256r1",fortuna,privKey);
    if (success == FALSE) {
        printf("%s\n",CkEcc_lastErrorText(ecc));
        CkPrng_Dispose(fortuna);
        CkEcc_Dispose(ecc);
        CkPrivateKey_Dispose(privKey);
        return;
    }

    // Save the private key to PKCS8 encrypted PEM
    // (The private key can be saved in a variety of different formats. See the online reference documentation.)
    success = CkPrivateKey_SavePkcs8EncryptedPemFile(privKey,"pemPassword","qa_output/eccPrivKey.pem");
    if (success != TRUE) {
        printf("%s\n",CkPrivateKey_lastErrorText(privKey));
    }

    // The private key PEM looks like this:

    // 	-----BEGIN ENCRYPTED PRIVATE KEY-----
    // 	MIHFMEAGCSqGSIb3DQEFDTAzMBsGCSqGSIb3DQEFDDAOBAhUmn+1/lwCIwICCAAw
    // 	FAYIKoZIhvcNAwcECPlyNXAXZO+oBIGAIvxvTENXJWbrCwSjh0QNxLecBotUpfI5
    // 	auOonLmwVMyt1ahMmNyVo/D+pnKQSE41Fg8fApM0DCDKZUOVCCcK1qirIsMPQkGp
    // 	klPJbvrQRVYgzBtU31uNB5y2wqhrIeepal1HXBvbkUK0nfJMbcdz/XAEIQu2HhTD
    // 	t6LMScPQld4=
    // 	-----END ENCRYPTED PRIVATE KEY-----

    // Now get the public key part from the private key.
    // (A public key is actually a subset of the private key.)
    pubKey = CkPublicKey_Create();
    CkPrivateKey_ToPublicKey(privKey,pubKey);

    // Save the public key to a PEM file.
    // (The public key can be saved in a variety of different formats. See the online reference documentation.)
    // For ECC keys, the 1st argument (bPreferPkcs1) is ignored and unused.
    bPreferPkcs1 = FALSE;
    success = CkPublicKey_SavePemFile(pubKey,bPreferPkcs1,"qa_output/eccPubKey.pem");

    // The public key PEM looks like this:

    // 	-----BEGIN PUBLIC KEY-----
    // 	MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA
    // 	AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA////
    // 	///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd
    // 	NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5
    // 	RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA
    // 	//////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABGdOH8uM6SfX3mdV+TR0mWp2
    // 	gfVRPlxWxwhOiowuNByBxmQz7ZR4CJY1XcN2zkUo5pzW73ZhGwgd2XTOvqPqG40=
    // 	-----END PUBLIC KEY-----
    // 

    printf("finished.\n");


    CkPrng_Dispose(fortuna);
    CkEcc_Dispose(ecc);
    CkPrivateKey_Dispose(privKey);
    CkPublicKey_Dispose(pubKey);

    }