Unicode C

Create Egypt ITIDA CAdES-BES .p7s Signature (with strings in-memory)

See more Egypt ITIDA Examples

Demonstrates how to create a .p7s signature that fits Egypt's ITIDA requirements.

Note: This example requires Chilkat v9.5.0.75 or greater.

Unicode C

#include <C_CkCrypt2W.h>
#include <C_CkCertW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkCrypt2W crypt;
    HCkCertW cert;
    HCkJsonObjectW cmsOptions;
    HCkJsonObjectW jsonSigningAttrs;
    const wchar_t *textToSign;
    const wchar_t *sigBase64;

    success = FALSE;

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

    crypt = CkCrypt2W_Create();

    cert = CkCertW_Create();

    // There are many ways to load the certificate.  
    // This example was created for a customer using an ePass2003 USB token.
    // Assuming the USB token is the only source of a hardware-based private key..
    success = CkCertW_LoadFromSmartcard(cert,L"");
    if (success != TRUE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkCrypt2W_Dispose(crypt);
        CkCertW_Dispose(cert);
        return;
    }

    // Tell the crypt component to use this cert.
    success = CkCrypt2W_SetSigningCert(crypt,cert);
    if (success != TRUE) {
        wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt));
        CkCrypt2W_Dispose(crypt);
        CkCertW_Dispose(cert);
        return;
    }

    cmsOptions = CkJsonObjectW_Create();
    // Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
    CkJsonObjectW_UpdateBool(cmsOptions,L"DigestData",TRUE);
    CkJsonObjectW_UpdateBool(cmsOptions,L"OmitAlgorithmIdNull",TRUE);
    CkCrypt2W_putCmsOptions(crypt,CkJsonObjectW_emit(cmsOptions));

    // The CadesEnabled property applies to all methods that create CMS/PKCS7 signatures. 
    // To create a CAdES-BES signature, set this property equal to true. 
    CkCrypt2W_putCadesEnabled(crypt,TRUE);

    CkCrypt2W_putHashAlgorithm(crypt,L"sha256");

    jsonSigningAttrs = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateInt(jsonSigningAttrs,L"contentType",1);
    CkJsonObjectW_UpdateInt(jsonSigningAttrs,L"signingTime",1);
    CkJsonObjectW_UpdateInt(jsonSigningAttrs,L"messageDigest",1);
    CkJsonObjectW_UpdateInt(jsonSigningAttrs,L"signingCertificateV2",1);
    CkCrypt2W_putSigningAttributes(crypt,CkJsonObjectW_emit(jsonSigningAttrs));

    // By default, all the certs in the chain of authentication are included in the signature.
    // If desired, we can choose to only include the signing certificate:
    CkCrypt2W_putIncludeCertChain(crypt,FALSE);

    // Make sure we sign the utf-8 byte representation of the JSON string
    CkCrypt2W_putCharset(crypt,L"utf-8");

    // Create the CAdES-BES signature.
    textToSign = L"\"issuer\"\"address\"\"branchID\"\"0\"\"country\"\"EG\"\"regionCity...";

    CkCrypt2W_putEncodingMode(crypt,L"base64");
    sigBase64 = CkCrypt2W_signStringENC(crypt,textToSign);
    if (CkCrypt2W_getLastMethodSuccess(crypt) == FALSE) {
        wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt));
        CkCrypt2W_Dispose(crypt);
        CkCertW_Dispose(cert);
        CkJsonObjectW_Dispose(cmsOptions);
        CkJsonObjectW_Dispose(jsonSigningAttrs);
        return;
    }

    wprintf(L"Base64 signature:\n");
    wprintf(L"%s\n",sigBase64);


    CkCrypt2W_Dispose(crypt);
    CkCertW_Dispose(cert);
    CkJsonObjectW_Dispose(cmsOptions);
    CkJsonObjectW_Dispose(jsonSigningAttrs);

    }