PKCS7 Decrypt MIME

Loads a PKCS7 encrypted MIME file and decrypts.

Downloads:

MS Windows Visual C/C++ Libraries

Linux/CentOS C/C++ Libraries

MAC OS X C/C++ Libraries

Solaris C/C++ Libraries

C++ Builder Libraries

#include <CkMime.h>

void ChilkatSample(void)
    {
    CkMime mime;

    bool success;
    success = mime.UnlockComponent("Anything for 30-day trial.");
    if (success == false) {
        printf("%s\n",mime.lastErrorText());
        return;
    }

    //  Load the MIME
    success = mime.LoadMimeFile("encrypted.mim");
    if (success == false) {
        printf("%s\n",mime.lastErrorText());
        return;
    }

    //  Decrypt...
    success = mime.Decrypt();
    if (success == false) {
        printf("%s\n",mime.lastErrorText());
        return;
    }

    //  Display the decrypted MIME:
    printf("%s\n",mime.getMime());

    //  How is it possible to magically decrypt with no information?
    //  Answer: It is possible to decrypt if the certificate with private key
    //  needed for decryption was previously installed onto the
    //  Windows computer.  PKCS7 encrypted (enveloped) data always
    //  includes information about the certificate required for
    //  decryption.  Chilkat uses it to automatically search the
    //  Windows registry-based certificate stores to find the
    //  certificate.

    //  If the certificate required for decryption was not installed, but
    //  you have a PFX file containing the cert + private key,
    //  then it may be used like this:

    //  The AddPfxSourceFile and/or AddPfxSourceData
    //  methods may be called one or more times (one per PFX)
    //  to add sources from which the MIME component will
    // search for certificates and private keys when decrypting.
    const char * pfxPassword;
    pfxPassword = "myPassword";
    success = mime.AddPfxSourceFile("myCertAndPrivateKey.pfx",pfxPassword);
    if (success == false) {
        printf("%s\n",mime.lastErrorText());
        return;
    }

    //  Now call Decrypt, and it will search the PFX sources
    //  previously added...

    }