(C) Add S/MIME Signature using PFX

Add a digital signature to a MIME message using the certificate + private key from a PFX file.

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

FreeBSD C++ Libraries

HP-UX C++ Libraries

BlackBerry QNX C++ Libraries

#include <C_CkMime.h>
#include <C_CkCert.h>

void ChilkatSample(void)
    {
    HCkMime mime;
    BOOL success;
    HCkCert cert;
    const char * pfxFilepath;
    const char * pfxPassword;

    mime = CkMime_Create();

    success = CkMime_UnlockComponent(mime,"Anything for 30-day trial");
    if (success == FALSE) {
        printf("%s\n",CkMime_lastErrorText(mime));
        return;
    }

    //  Load a PFX file into a certificate object.
    cert = CkCert_Create();

    pfxFilepath = "pfxFiles/something.pfx";

    pfxPassword = "secret";
    success = CkCert_LoadPfxFile(cert,pfxFilepath,pfxPassword);
    if (success == FALSE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        return;
    }

    CkMime_SetBodyFromPlainText(mime,"This is the plain-text MIME body.");

    CkMime_putCharset(mime,"utf-8");
    CkMime_putEncoding(mime,"quoted-printable");

    //  Sign the MIME (adds a PKCS7 detached signature)
    success = CkMime_AddDetachedSignature(mime,cert);
    if (success == FALSE) {
        printf("%s\n",CkMime_lastErrorText(mime));
        return;
    }

    //  Save the S/MIME to a file.
    success = CkMime_SaveMime(mime,"/temp/signedMime.txt");
    if (success == FALSE) {
        printf("%s\n",CkMime_lastErrorText(mime));
        return;
    }

    printf("success!\n");

    CkMime_Dispose(mime);
    CkCert_Dispose(cert);

    }