C

AddDetachedSignaturePk

See more MIME Examples

Demonstrates how to add a detached signature using a certifcate and it's corresponding private key. The easiest way of doing it is when both the certificate and private key are contained together within a PFX (.pfx or .p12) file. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key. C

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

void ChilkatSample(void)
    {
    BOOL success;
    HCkMime mime;
    HCkCert cert;
    HCkPrivateKey privKey;

    success = FALSE;

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

    mime = CkMime_Create();

    // Load the certificate from a .cer file.
    cert = CkCert_Create();
    success = CkCert_LoadFromFile(cert,"aaworkarea/myCert.cer");
    if (success == FALSE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkMime_Dispose(mime);
        CkCert_Dispose(cert);
        return;
    }

    // Load the private key from an encrypted PEM file.
    // (A private key can be loaded from other file formats also..)
    privKey = CkPrivateKey_Create();
    success = CkPrivateKey_LoadEncryptedPemFile(privKey,"aaworkarea/myPrivateKey.pem","myPassword");
    if (success == FALSE) {
        printf("%s\n",CkPrivateKey_lastErrorText(privKey));
        CkMime_Dispose(mime);
        CkCert_Dispose(cert);
        CkPrivateKey_Dispose(privKey);
        return;
    }

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

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

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

    printf("success!\n");


    CkMime_Dispose(mime);
    CkCert_Dispose(cert);
    CkPrivateKey_Dispose(privKey);

    }