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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 <C_CkRsa.h> #include <C_CkPrivateKey.h> #include <C_CkPublicKey.h> #include <C_CkBinData.h> void ChilkatSample(void) { BOOL success; HCkRsa rsa; HCkPrivateKey privKey; HCkPublicKey pubKey; const char *plainText; BOOL bUsePrivateKey; const char *encryptedStr; HCkBinData bd; success = FALSE; // This requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. rsa = CkRsa_Create(); privKey = CkPrivateKey_Create(); success = CkRsa_GenKey(rsa,2048,privKey); success = CkPrivateKey_SavePkcs8PemFile(privKey,"qa_output/privKey.pem"); pubKey = CkPublicKey_Create(); CkPrivateKey_ToPublicKey(privKey,pubKey); CkRsa_putEncodingMode(rsa,"base64"); plainText = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890"; bUsePrivateKey = FALSE; CkRsa_UsePublicKey(rsa,pubKey); encryptedStr = CkRsa_encryptStringENC(rsa,plainText,bUsePrivateKey); bd = CkBinData_Create(); CkBinData_AppendEncoded(bd,encryptedStr,"base64"); success = CkBinData_WriteFile(bd,"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 printf("OK\n"); CkRsa_Dispose(rsa); CkPrivateKey_Dispose(privKey); CkPublicKey_Dispose(pubKey); CkBinData_Dispose(bd); } |
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