Chilkat Examples

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VB.NET UWP/WinRT Examples

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(VB.NET UWP/WinRT) P7S - Access Signature Information (date/time, certificate used, etc.)

Examine a PKCS7 signature (.p7s) and get information about it. Note: This example requires Chilkat v9.5.0.75 or greater.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

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


'  First load the .p7s file into a BinData object..
Dim bd As New Chilkat.BinData
Dim success As Boolean = bd.LoadFile("qa_data/p7s/sample.p7s")
If (success <> True) Then
    Debug.WriteLine("Failed to load .p7s file.")
    Exit Sub
End If


'  IMPORTANT:  This example requires Chilkat v9.5.0.75 or greater.
Dim crypt As New Chilkat.Crypt2

'  Assuming this is a signature that contains the original data that was signed..
success = crypt.OpaqueVerifyBd(bd)
If (success <> True) Then
    Debug.WriteLine(crypt.LastErrorText)
    Exit Sub
End If


'  Examine the LastJsonData after signature verification..
Dim json As Chilkat.JsonObject = crypt.LastJsonData()
json.EmitCompact = False
Debug.WriteLine(json.Emit())

'  --
'  IMPORTANT:  This example requires Chilkat v9.5.0.75 or greater.
'  --

'  Sample output...
'  Go to http://tools.chilkat.io/jsonParse.cshtml
'  and paste the JSON into the online form to generate JSON parsing code.

'  {
'    "pkcs7": {
'      "verify": {
'        "digestAlgorithms": [
'          "sha256"
'        ],
'        "signerInfo": [
'          {
'            "cert": {
'              "serialNumber": "AAC5FC48C0FD8FBB",
'              "issuerCN": "AC ABCDEF RFB v5",
'              "issuerDN": "",
'              "digestAlgOid": "2.16.840.1.101.3.4.2.1",
'              "digestAlgName": "SHA-256"
'            },
'            "contentType": "1.2.840.113549.1.7.1",
'            "signingTime": "180607195054Z",
'            "messageDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8=",
'            "signingAlgOid": "1.2.840.113549.1.1.11",
'            "signerDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8="
'          },
'          {
'            "cert": {
'              "serialNumber": "324FB38ABD59723F",
'              "issuerCN": "AC ABCDEF RFB v5",
'              "issuerDN": "",
'              "digestAlgOid": "2.16.840.1.101.3.4.2.1",
'              "digestAlgName": "SHA-256"
'            },
'            "contentType": "1.2.840.113549.1.7.1",
'            "signingTime": "180608182517Z",
'            "messageDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8=",
'            "signingAlgOid": "1.2.840.113549.1.1.11",
'            "signerDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8="
'          }
'        ]
'      }
'    }
'  }
' 




' println crypt.LastErrorText;
Debug.WriteLine("Success.")

 

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