Sign a Hash to create PKCS7 Output

Uses a digital certificate to sign a SHA-1 hash to produce PKCS7 output.

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 <CkCrypt2.h>
#include <CkByteData.h>
#include <CkCreateCS.h>
#include <CkCertStore.h>
#include <CkCert.h>

void ChilkatSample(void)
    {
    CkCrypt2 crypt;

    //  Any string argument automatically begins the 30-day trial.
    bool success;
    success = crypt.UnlockComponent("30-day trial");
    if (success != true) {
        printf("%s\n",crypt.lastErrorText());
        return;
    }

    //  First, create an SHA-1 hash to be signed:
    const char * toBeHashed;
    toBeHashed = "This is a test";

    CkByteData hash;
    crypt.put_HashAlgorithm("sha1");

    success = crypt.HashString(toBeHashed,hash);
    if (success != true) {
        printf("%s\n",crypt.lastErrorText());
        return;
    }

    //  Locate a digital certificate from the registry-based
    //  Current User certificate store.
    CkCreateCS ccs;
    CkCertStore *certStore = 0;
    certStore = ccs.OpenCurrentUserStore();
    CkCert *cert = 0;
    cert = certStore->FindCertBySubjectCN("Chilkat Software, Inc.");
    if (cert == 0 ) {
        printf("%s\n",cert->lastErrorText());
        delete certStore;
        return;
    }

    //  Tell the encryption component to use this cert.
    crypt.SetSigningCert(*cert);

    delete certStore;

    //  Tell the encryption component to use public-key encryption:
    crypt.put_CryptAlgorithm("pki");

    CkByteData pkcs7;

    success = crypt.SignBytes(hash,pkcs7);
    if (success == false) {
        printf("%s\n",crypt.lastErrorText());
        delete cert;
        return;
    }

    delete cert;

    //  Save the PKCS7 signature to a file.
    success = pkcs7.saveFile("out_pkcs7.p7s");
    if (success == false) {
        printf("Failed to save output file.\n");
    }
    else {
        printf("Success.\n");
    }


    }