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(C++) RSA Encrypt and OpenSSL DecryptDemonstrates how to use Chilkat to RSA encrypt, and then use OpenSSL to decrypt. Note: This example requires Chilkat v11.0.0 or greater.
#include <CkRsa.h> #include <CkPrivateKey.h> #include <CkPublicKey.h> #include <CkBinData.h> void ChilkatSample(void) { bool success = false; // This requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkRsa rsa; CkPrivateKey privKey; success = rsa.GenKey(2048,privKey); success = privKey.SavePkcs8PemFile("qa_output/privKey.pem"); CkPublicKey pubKey; privKey.ToPublicKey(pubKey); rsa.put_EncodingMode("base64"); const char *plainText = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890"; bool bUsePrivateKey = false; rsa.UsePublicKey(pubKey); const char *encryptedStr = rsa.encryptStringENC(plainText,bUsePrivateKey); CkBinData bd; bd.AppendEncoded(encryptedStr,"base64"); success = bd.WriteFile("qa_output/enc.dat"); // The OpenSSL command to decrypt is: // openssl pkeyutl -in enc.dat -inkey privKey.pem -keyform PEM -pkeyopt rsa_padding_mode:pkcs1 -decrypt std::cout << "OK" << "\r\n"; } |
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