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Classic ASP Examples

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(Classic ASP) Create PKCS7 Attached/Opaque Signature (S/MIME)

Create an S/MIME message with a PKCS7 attached/opaque signature.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
set mime = Server.CreateObject("Chilkat_9_5_0.Mime")

success = mime.UnlockComponent("Anything for 30-day trial")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( mime.LastErrorText) & "</pre>"
    Response.End
End If

'  Load a certificate w/ private key for signing.
'  There are many ways of getting a certificate object:
'  from a pfx file, from .cer and private-key files, from the
'  Windows registry-based certificate stores, etc.
'  Load a PFX file into a certificate object.
set cert = Server.CreateObject("Chilkat_9_5_0.Cert")
pfxFilepath = "pfxFiles/something.pfx"
pfxPassword = "secret"
success = cert.LoadPfxFile(pfxFilepath,pfxPassword)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( cert.LastErrorText) & "</pre>"
    Response.End
End If

'  Create a very simple MIME message to be signed:
success = mime.AddHeaderField("Subject","This is a test")
success = mime.AddHeaderField("MyCustomHeader","abc123")
mime.ContentType = "text/plain"
mime.SetBody "This is a plain-text body."

'  Examine the MIME prior to signing:
Response.Write "<pre>" & Server.HTMLEncode( "--- MIME prior to signing ---") & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( mime.GetMime()) & "</pre>"

'  The MIME prior to signing looks like this:
'  -------------------------------------------------------------------------------

'  Subject: This is a test
'  MyCustomHeader: abc123
'  Content-Type: text/plain
' 
'  This is a plain-text body.

'  -------------------------------------------------------------------------------

'  The default hash algorithm used in the signing process is "SHA1".
'  To change it, set the SigningHashAlg property:
mime.SigningHashAlg = "SHA256"

'  Convert the MIME to PKCS7 signed-data.
success = mime.ConvertToSigned(cert)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( mime.LastErrorText) & "</pre>"
    Response.End
End If

'  Examine the signed MIME
Response.Write "<pre>" & Server.HTMLEncode( "--- MIME converted to PKCS7 signed-data ---") & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( mime.GetMime()) & "</pre>"

'  The MIME after signing looks like this:
'  -------------------------------------------------------------------------------

'  Subject: This is a test
'  MyCustomHeader: abc123
'  Content-Disposition: attachment; filename="smime.p7m";
'  Content-Transfer-Encoding: base64
'  Content-Type: application/x-pkcs7-mime;
'   name="smime.p7m"; smime-type="signed-data";
' 
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' 

'  -------------------------------------------------------------------------------

%>
</body>
</html>

 

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