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(Unicode C) Generate an ECC Key (Public and Private)Demonstrates how to generate an ECC key and save both public and private parts.
#include <C_CkPrngW.h> #include <C_CkEccW.h> #include <C_CkPrivateKeyW.h> #include <C_CkPublicKeyW.h> void ChilkatSample(void) { HCkPrngW fortuna; const wchar_t *entropy; BOOL success; HCkEccW ecc; HCkPrivateKeyW privKey; HCkPublicKeyW pubKey; BOOL bPreferPkcs1; // 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 = CkPrngW_Create(); entropy = CkPrngW_getEntropy(fortuna,32,L"base64"); success = CkPrngW_AddEntropy(fortuna,entropy,L"base64"); ecc = CkEccW_Create(); // Generate a random ECC private key on the secp256r1 curve. // Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256k1. privKey = CkEccW_GenEccKey(ecc,L"secp256r1",fortuna); if (CkEccW_getLastMethodSuccess(ecc) == FALSE) { wprintf(L"%s\n",CkEccW_lastErrorText(ecc)); CkPrngW_Dispose(fortuna); CkEccW_Dispose(ecc); 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 = CkPrivateKeyW_SavePkcs8EncryptedPemFile(privKey,L"pemPassword",L"qa_output/eccPrivKey.pem"); if (success != TRUE) { wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(privKey)); } CkPrivateKeyW_Dispose(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 = CkPrivateKeyW_GetPublicKey(privKey); // 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 = CkPublicKeyW_SavePemFile(pubKey,bPreferPkcs1,L"qa_output/eccPubKey.pem"); CkPublicKeyW_Dispose(pubKey); // 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----- // wprintf(L"finished.\n"); CkPrngW_Dispose(fortuna); CkEccW_Dispose(ecc); } |
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