Unicode C++

Duplicate openssl smime -decrypt -in some_file.dat.enc -binary -inform DER -inkey private.key -out some_file.dat

See more OpenSSL Examples

Demonstrates how to decrypt binary DER that was encrypted using the following openssl command:

openssl smime -encrypt -binary -aes-256-cbc -in some_file.dat -out some_file.dat.enc -outform DER cert.crt

Unicode C++

#include <CkCertW.h>
#include <CkBinDataW.h>
#include <CkPrivateKeyW.h>
#include <CkCrypt2W.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    // Duplicates the following openssl command:
    // openssl smime -decrypt -in hello.txt.enc -binary -inform DER -inkey private.key -out hello.txt

    CkCertW cert;
    success = cert.LoadFromFile(L"qa_data/openssl/EE.cer");
    if (success == false) {
        wprintf(L"%s\n",cert.lastErrorText());
        return;
    }

    CkBinDataW bd;
    success = bd.LoadFile(L"qa_data/openssl/EE.key");
    // Assuming success..

    CkPrivateKeyW privKey;
    success = privKey.LoadAnyFormat(bd,L"");
    if (success == false) {
        wprintf(L"%s\n",privKey.lastErrorText());
        return;
    }

    CkCrypt2W crypt;
    success = crypt.SetDecryptCert2(cert,privKey);
    if (success == false) {
        wprintf(L"%s\n",crypt.lastErrorText());
        return;
    }

    crypt.put_CryptAlgorithm(L"PKI");
    success = crypt.CkDecryptFile(L"qa_data/openssl/hello.txt.enc",L"qa_output/hello.txt");
    if (success == false) {
        wprintf(L"%s\n",crypt.lastErrorText());
        return;
    }

    wprintf(L"Success.\n");
    }