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(ASP) Convert DSA PEM Private Key to DER

Converts a DSA private key from PEM format to DER. The first part of the example will convert an unencrypted PEM to DER, then 2nd part will convert an encrypted PEM to unencrypted DER.

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%


set dsa = Server.CreateObject("Chilkat.Dsa")

success = dsa.UnlockComponent("Anything for 30-day trial")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode(dsa.LastErrorText) & "</pre>"

End If

'  Load a PEM private key.

pemPrivateKey = dsa.LoadText("dsa_priv.pem")
'  Import the unencrypted PEM into the DSA object.
success = dsa.FromPem(pemPrivateKey)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode(dsa.LastErrorText) & "</pre>"

End If

'  Write it out as a DER file:
success = dsa.ToDerFile("dsa_priv.der")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode(dsa.LastErrorText) & "</pre>"

End If

'  Load an encrypted PEM private key.
pemPrivateKey = dsa.LoadText("dsa_privEncrypted.pem")
'  Import the encrypted PEM into the DSA object.
success = dsa.FromEncryptedPem("myPassword",pemPrivateKey)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode(dsa.LastErrorText) & "</pre>"

End If

'  Write it out as an unencrypted DER file:
success = dsa.ToDerFile("dsa_priv2.der")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode(dsa.LastErrorText) & "</pre>"

End If

Response.Write "<pre>" & Server.HTMLEncode("Finished!") & "</pre>"
%>
</body>
</html>

 

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