C

Sign Manifest File to Generate a Passbook .pkpass in Memory

Demonstrates how to create a Passbook .pkpass archive by creating a signature of a manifest file and then zipping to a .pkpass archive in memory C

#include <C_CkJsonObject.h>
#include <C_CkCrypt2.h>
#include <C_CkZip.h>
#include <C_CkBinData.h>
#include <C_CkXmlCertVault.h>
#include <C_CkCert.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObject manifest;
    HCkCrypt2 crypt;
    HCkZip zip;
    const char *digestStr;
    HCkBinData pngData;
    const char *passJson;
    HCkXmlCertVault certVault;
    HCkCert appleWwdrCert;
    HCkBinData bdPfx;
    const char *pfxPassword;
    HCkCert cert;
    HCkJsonObject jsonSignedAttrs;
    const char *sig;
    HCkBinData bdSig;
    HCkBinData bdZip;

    success = FALSE;

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

    // ---------------------------------------------------------------------------------------------
    // This example is the same as Sign Manifest File to Generate a Passbook .pkpass file
    // except everything happens in memory (no input files, no output files)
    // ---------------------------------------------------------------------------------------------

    // First create the manifest.json

    manifest = CkJsonObject_Create();
    crypt = CkCrypt2_Create();

    zip = CkZip_Create();
    CkZip_NewZip(zip,"notUsedAndNeverCreated.zip");

    CkCrypt2_putHashAlgorithm(crypt,"sha1");
    // Return hashes as lowercase hex.
    CkCrypt2_putEncodingMode(crypt,"hexlower");

    pngData = CkBinData_Create();
    // Assume we load the pngData with bytes for "icon.png" from somewhere, such as a byte array in memory.
    CkZip_AddBd(zip,"icon.png",pngData);
    digestStr = CkCrypt2_hashBdENC(crypt,pngData);
    CkJsonObject_UpdateString(manifest,"\"icon.png\"",digestStr);

    CkBinData_Clear(pngData);
    // Assume we load the pngData with bytes for "icon@2x.png" from somewhere...
    CkZip_AddBd(zip,"icon@2x.png",pngData);
    digestStr = CkCrypt2_hashBdENC(crypt,pngData);
    CkJsonObject_UpdateString(manifest,"\"icon@2x.png\"",digestStr);

    CkBinData_Clear(pngData);
    // Assume we load the pngData with bytes for "logo.png" from somewhere...
    CkZip_AddBd(zip,"logo.png",pngData);
    digestStr = CkCrypt2_hashBdENC(crypt,pngData);
    CkJsonObject_UpdateString(manifest,"\"logo.png\"",digestStr);

    CkBinData_Clear(pngData);
    // Assume we load the pngData with bytes for "logo@2x.png" from somewhere...
    CkZip_AddBd(zip,"logo@2x.png",pngData);
    digestStr = CkCrypt2_hashBdENC(crypt,pngData);
    CkJsonObject_UpdateString(manifest,"\"logo@2x.png\"",digestStr);

    passJson = "{ .... }";    //  Contains the contents of pass.json
    CkZip_AddString(zip,"pass.json",passJson,"utf-8");
    digestStr = CkCrypt2_hashStringENC(crypt,passJson);
    CkJsonObject_UpdateString(manifest,"\"pass.json\"",digestStr);

    CkZip_AddString(zip,"manifest.json",CkJsonObject_emit(manifest),"utf-8");

    // Make sure we have the Apple WWDR intermediate certificate available for 
    // the cert chain in the signature.
    certVault = CkXmlCertVault_Create();
    appleWwdrCert = CkCert_Create();
    success = CkCert_LoadByCommonName(appleWwdrCert,"Apple Worldwide Developer Relations Certification Authority");
    if (success != TRUE) {
        printf("The Apple WWDR intermediate certificate is not installed.\n");
        printf("It is available at https://developer.apple.com/certificationauthority/AppleWWDRCA.cer\n");
        printf("You may alternatively load the .cer like this...\n");
        success = CkCert_LoadFromFile(appleWwdrCert,"qa_data/certs/AppleWWDRCA.cer");
        if (success == FALSE) {
            printf("%s\n",CkCert_lastErrorText(appleWwdrCert));
            CkJsonObject_Dispose(manifest);
            CkCrypt2_Dispose(crypt);
            CkZip_Dispose(zip);
            CkBinData_Dispose(pngData);
            CkXmlCertVault_Dispose(certVault);
            CkCert_Dispose(appleWwdrCert);
            return;
        }

    }

    CkXmlCertVault_AddCert(certVault,appleWwdrCert);
    CkCrypt2_UseCertVault(crypt,certVault);

    // Use a digital certificate and private key from a PFX
    bdPfx = CkBinData_Create();
    // Assume we loaded a PFX into bdPfx....
    pfxPassword = "test123";

    cert = CkCert_Create();
    success = CkCert_LoadPfxBd(cert,bdPfx,pfxPassword);
    if (success == FALSE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkJsonObject_Dispose(manifest);
        CkCrypt2_Dispose(crypt);
        CkZip_Dispose(zip);
        CkBinData_Dispose(pngData);
        CkXmlCertVault_Dispose(certVault);
        CkCert_Dispose(appleWwdrCert);
        CkBinData_Dispose(bdPfx);
        CkCert_Dispose(cert);
        return;
    }

    // Provide the signing cert (with associated private key).
    success = CkCrypt2_SetSigningCert(crypt,cert);
    if (success == FALSE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        CkJsonObject_Dispose(manifest);
        CkCrypt2_Dispose(crypt);
        CkZip_Dispose(zip);
        CkBinData_Dispose(pngData);
        CkXmlCertVault_Dispose(certVault);
        CkCert_Dispose(appleWwdrCert);
        CkBinData_Dispose(bdPfx);
        CkCert_Dispose(cert);
        return;
    }

    // Specify the signed attributes to be included.
    // (These attributes appear to not be necessary, but we're including
    // them just in case they become necessary in the future.)
    jsonSignedAttrs = CkJsonObject_Create();
    CkJsonObject_UpdateInt(jsonSignedAttrs,"contentType",1);
    CkJsonObject_UpdateInt(jsonSignedAttrs,"signingTime",1);
    CkCrypt2_putSigningAttributes(crypt,CkJsonObject_emit(jsonSignedAttrs));

    // Sign the manifest JSON to produce a signature
    CkCrypt2_putEncodingMode(crypt,"base64");
    sig = CkCrypt2_signStringENC(crypt,CkJsonObject_emit(manifest));
    bdSig = CkBinData_Create();
    CkBinData_AppendEncoded(bdSig,sig,"base64");
    CkZip_AddBd(zip,"signature",bdSig);

    // ---------------------------------------------------------------------------------------------
    // Note: Chilkat also has the capability to do everything in-memory (no files would be involved).  
    // If this is of interest, please send email to support@chilkatsoft.com
    // ---------------------------------------------------------------------------------------------

    // Create the .pkipass archive (which is a .zip archive containing the required files).
    // the .zip is written to bdZip
    bdZip = CkBinData_Create();
    success = CkZip_WriteBd(zip,bdZip);
    if (success == FALSE) {
        printf("%s\n",CkZip_lastErrorText(zip));
        CkJsonObject_Dispose(manifest);
        CkCrypt2_Dispose(crypt);
        CkZip_Dispose(zip);
        CkBinData_Dispose(pngData);
        CkXmlCertVault_Dispose(certVault);
        CkCert_Dispose(appleWwdrCert);
        CkBinData_Dispose(bdPfx);
        CkCert_Dispose(cert);
        CkJsonObject_Dispose(jsonSignedAttrs);
        CkBinData_Dispose(bdSig);
        CkBinData_Dispose(bdZip);
        return;
    }

    printf("Success.\n");


    CkJsonObject_Dispose(manifest);
    CkCrypt2_Dispose(crypt);
    CkZip_Dispose(zip);
    CkBinData_Dispose(pngData);
    CkXmlCertVault_Dispose(certVault);
    CkCert_Dispose(appleWwdrCert);
    CkBinData_Dispose(bdPfx);
    CkCert_Dispose(cert);
    CkJsonObject_Dispose(jsonSignedAttrs);
    CkBinData_Dispose(bdSig);
    CkBinData_Dispose(bdZip);

    }