B4X Requires Chilkat v11.0.0+

Sign Manifest File to Generate a Passbook .pkpass file

See more Digital Signatures Examples

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

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

B4X

Dim success As Boolean = False

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

'  ---------------------------------------------------------------------------------------------
'  Note: Chilkat also has the capability to do everything in-memory (no files would be involved).  
'  See this example:  Sign Manifest File to Generate a Passbook .pkpass in Memory
'  ---------------------------------------------------------------------------------------------

'  First create the manifest.json

Dim manifest As ChilkatJsonObject
manifest.Initialize
Dim crypt As ChilkatCrypt2
crypt.Initialize("crypt")

Dim zip As ChilkatZip
zip.Initialize("zip")
zip.NewZip("qa_data/p7s/pass-wallet/example.pkpass")
'  Set the AppendFromDir property to prevent that relative paths from being stored in the .pkpass archive.
zip.AppendFromDir = "qa_data/p7s/pass-wallet/"

crypt.HashAlgorithm = "sha1"
'  Return hashes as lowercase hex.
crypt.EncodingMode = "hexlower"

Dim fileHash As String
Dim filePath As String
filePath = "qa_data/p7s/pass-wallet/icon.png"
fileHash = crypt.HashFileENC(filePath)
zip.AddFile("icon.png", False)
manifest.UpdateString(Chr(34) & "icon.png" & Chr(34), fileHash)

filePath = "qa_data/p7s/pass-wallet/icon@2x.png"
fileHash = crypt.HashFileENC(filePath)
zip.AddFile("icon@2x.png", False)
manifest.UpdateString(Chr(34) & "icon@2x.png" & Chr(34), fileHash)

filePath = "qa_data/p7s/pass-wallet/logo.png"
fileHash = crypt.HashFileENC(filePath)
zip.AddFile("logo.png", False)
manifest.UpdateString(Chr(34) & "logo.png" & Chr(34), fileHash)

filePath = "qa_data/p7s/pass-wallet/logo@2x.png"
fileHash = crypt.HashFileENC(filePath)
zip.AddFile("logo@2x.png", False)
manifest.UpdateString(Chr(34) & "logo@2x.png" & Chr(34), fileHash)

filePath = "qa_data/p7s/pass-wallet/pass.json"
fileHash = crypt.HashFileENC(filePath)
zip.AddFile("pass.json", False)
manifest.UpdateString(Chr(34) & "pass.json" & Chr(34), fileHash)

Dim sbJson As ChilkatStringBuilder
sbJson.Initialize
manifest.EmitSb(sbJson)
Dim manifestPath As String = "qa_data/p7s/pass-wallet/manifest.json"
sbJson.WriteFile(manifestPath, "utf-8", False)
zip.AddFile("manifest.json", False)

'  Make sure we have the Apple WWDR intermediate certificate available for 
'  the cert chain in the signature.
Dim certVault As ChilkatXmlCertVault
certVault.Initialize
Dim appleWwdrCert As ChilkatCert
appleWwdrCert.Initialize("appleWwdrCert")
success = appleWwdrCert.LoadByCommonName("Apple Worldwide Developer Relations Certification Authority")
If success <> True Then
    Log("The Apple WWDR intermediate certificate is not installed.")
    Log("It is available at https://developer.apple.com/certificationauthority/AppleWWDRCA.cer")
    Log("You may alternatively load the .cer like this...")
    success = appleWwdrCert.LoadFromFile("qa_data/certs/AppleWWDRCA.cer")
    If success = False Then
        Log(appleWwdrCert.LastErrorText)
        Return
    End If


End If

certVault.AddCert(appleWwdrCert)
crypt.UseCertVault(certVault)

'  Use a digital certificate and private key from a PFX file (.pfx or .p12).
Dim pfxPath As String = "qa_data/pfx/cert_test123.pfx"
Dim pfxPassword As String = "test123"

Dim cert As ChilkatCert
cert.Initialize("cert")
success = cert.LoadPfxFile(pfxPath, pfxPassword)
If success = False Then
    Log(cert.LastErrorText)
    Return
End If


'  Provide the signing cert (with associated private key).
success = crypt.SetSigningCert(cert)
If success = False Then
    Log(crypt.LastErrorText)
    Return
End If


'  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.)
Dim jsonSignedAttrs As ChilkatJsonObject
jsonSignedAttrs.Initialize
jsonSignedAttrs.UpdateInt("contentType", 1)
jsonSignedAttrs.UpdateInt("signingTime", 1)
crypt.SigningAttributes = jsonSignedAttrs.Emit

'  Sign the manifest JSON file to produce a file named "signature".
Dim sigPath As String = "qa_data/p7s/pass-wallet/signature"

'  Create the "signature" file.
success = crypt.CreateP7S(manifestPath, sigPath)
If success = False Then
    Log(crypt.LastErrorText)
    Return
End If


zip.AddFile("signature", False)

'  ---------------------------------------------------------------------------------------------
'  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).
success = zip.WriteZipAndClose
If success = False Then
    Log(zip.LastErrorText)
    Return
End If


Log("Success.")