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(Unicode C) RSA Encrypt and OpenSSL DecryptDemonstrates how to use Chilkat to RSA encrypt, and then use OpenSSL to decrypt.
#include <C_CkRsaW.h> #include <C_CkPrivateKeyW.h> #include <C_CkBinDataW.h> void ChilkatSample(void) { HCkRsaW rsa; BOOL success; HCkPrivateKeyW privKey; const wchar_t *plainText; BOOL bUsePrivateKey; const wchar_t *encryptedStr; HCkBinDataW bd; // This requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. rsa = CkRsaW_Create(); success = CkRsaW_GenerateKey(rsa,2048); privKey = CkRsaW_ExportPrivateKeyObj(rsa); success = CkPrivateKeyW_SavePkcs8PemFile(privKey,L"qa_output/privKey.pem"); CkPrivateKeyW_Dispose(privKey); CkRsaW_putEncodingMode(rsa,L"base64"); plainText = L"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890"; bUsePrivateKey = FALSE; encryptedStr = CkRsaW_encryptStringENC(rsa,plainText,bUsePrivateKey); bd = CkBinDataW_Create(); CkBinDataW_AppendEncoded(bd,encryptedStr,L"base64"); success = CkBinDataW_WriteFile(bd,L"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 wprintf(L"OK\n"); CkRsaW_Dispose(rsa); CkBinDataW_Dispose(bd); } |
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