C

Add S/MIME Signature using PFX

See more MIME Examples

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

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

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

    success = FALSE;

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

    mime = CkMime_Create();

    // 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));
        CkMime_Dispose(mime);
        CkCert_Dispose(cert);
        return;
    }

    success = 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));
        CkMime_Dispose(mime);
        CkCert_Dispose(cert);
        return;
    }

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

    printf("success!\n");


    CkMime_Dispose(mime);
    CkCert_Dispose(cert);

    }