PowerBuilder

Generate a CSR with keyUsage, extKeyUsage, and other Extensions

See more CSR Examples

Demonstrates how to generate a CSR containing a 1.2.840.113549.1.9.14 extensionRequest with the following extensions:

• 1.3.6.1.4.1.311.20.2 enrollCerttypeExtension
• 2.5.29.15 keyUsage
• 2.5.29.37 extKeyUsage
• 2.5.29.14 subjectKeyIdentifier

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Ecc
oleobject loo_Prng
oleobject loo_PrivKey
oleobject loo_Csr
string s
oleobject loo_BdTemp
string ls_S_base64_utf16be
oleobject loo_Xml
oleobject loo_PubKey
oleobject loo_BdPubKeyDer
string ls_Ski
string ls_CsrPem

li_Success = 0

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

// This example will generate a secp256r1 ECDSA key for the CSR.
loo_Ecc = create oleobject
li_rc = loo_Ecc.ConnectToNewObject("Chilkat.Ecc")
if li_rc < 0 then
    destroy loo_Ecc
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_Prng = create oleobject
li_rc = loo_Prng.ConnectToNewObject("Chilkat.Prng")

loo_PrivKey = create oleobject
li_rc = loo_PrivKey.ConnectToNewObject("Chilkat.PrivateKey")

li_Success = loo_Ecc.GenKey("secp256r1",loo_Prng,loo_PrivKey)
if li_Success = 0 then
    Write-Debug "Failed to generate a new ECDSA private key."
    destroy loo_Ecc
    destroy loo_Prng
    destroy loo_PrivKey
    return
end if

loo_Csr = create oleobject
li_rc = loo_Csr.ConnectToNewObject("Chilkat.Csr")

// Add common CSR fields:
loo_Csr.CommonName = "mysubdomain.mydomain.com"
loo_Csr.Country = "GB"
loo_Csr.State = "Yorks"
loo_Csr.Locality = "York"
loo_Csr.Company = "Internet Widgits Pty Ltd"
loo_Csr.EmailAddress = "support@mydomain.com"

// Add the following 1.2.840.113549.1.9.14 extensionRequest
// Note: The easiest way to know the content and format of the XML to be added is to examine
// a pre-existing CSR with the same desired extensionRequest.  You can use Chilkat to
// get the extensionRequest from an existing CSR. 

// 
// Here is a sample extension request:

// <?xml version="1.0" encoding="utf-8"?>
// <set>
//     <sequence>
//         <sequence>
//             <oid>1.3.6.1.4.1.311.20.2</oid>
//             <asnOctets>
//                 <universal tag="30" constructed="0">AEUAbgBkAEUAbgB0AGkAdAB5AEMAbABpAGUAbgB0AEEAdQB0AGgAQwBlAHIAdABpAGYAaQBjAGEAdABl
// AF8AQwBTAFIAUABhAHMAcwB0AGgAcgBvAHUAZwBoAC8AVgAx</universal>
//             </asnOctets>
//         </sequence>
//         <sequence>
//             <oid>2.5.29.15</oid>
//             <bool>1</bool>
//             <asnOctets>
//                 <bits n="3">A0</bits>
//             </asnOctets>
//         </sequence>
//         <sequence>
//             <oid>2.5.29.37</oid>
//             <asnOctets>
//                 <sequence>
//                     <oid>1.3.6.1.5.5.7.3.3</oid>
//                 </sequence>
//             </asnOctets>
//         </sequence>
//         <sequence>
//             <oid>2.5.29.14</oid>
//             <asnOctets>
//                 <octets>MCzBMQAViXBz8IDt8LsgmJxJ4Xg=</octets>
//             </asnOctets>
//         </sequence>
//     </sequence>
// </set>

// Use this online tool to generate code from sample XML: 
// Generate Code to Create XML

// A few notes:
// The string "AEUAbgBkAEUAbgB0AGkAdAB5AEMAbABpAGUAbgB0AEEAdQB0AGgAQwBlAHIAdABpAGYAaQBjAGEAdABlAF8AQwBTAFIAUABhAHMAcwB0AGgAcgBvAHUAZwBoAC8AVgAx"
// is the base64 encoding of the utf-16be byte representation of the string "EndEntityClientAuthCertificate_CSRPassthrough/V1"

s = "EndEntityClientAuthCertificate_CSRPassthrough/V1"
loo_BdTemp = create oleobject
li_rc = loo_BdTemp.ConnectToNewObject("Chilkat.BinData")

loo_BdTemp.AppendString(s,"utf-16be")
ls_S_base64_utf16be = loo_BdTemp.GetEncoded("base64")
// The string should be "AEUA....."
Write-Debug ls_S_base64_utf16be

// Here's the code to generate the above extension request.

loo_Xml = create oleobject
li_rc = loo_Xml.ConnectToNewObject("Chilkat.Xml")

loo_Xml.Tag = "set"
loo_Xml.UpdateChildContent("sequence|sequence|oid","1.3.6.1.4.1.311.20.2")
loo_Xml.UpdateAttrAt("sequence|sequence|asnOctets|universal",1,"tag","30")
loo_Xml.UpdateAttrAt("sequence|sequence|asnOctets|universal",1,"constructed","0")
loo_Xml.UpdateChildContent("sequence|sequence|asnOctets|universal",ls_S_base64_utf16be)
loo_Xml.UpdateChildContent("sequence|sequence[1]|oid","2.5.29.15")
loo_Xml.UpdateChildContent("sequence|sequence[1]|bool","1")
loo_Xml.UpdateAttrAt("sequence|sequence[1]|asnOctets|bits",1,"n","3")
// A0 is hex for decimal 160.
loo_Xml.UpdateChildContent("sequence|sequence[1]|asnOctets|bits","A0")
loo_Xml.UpdateChildContent("sequence|sequence[2]|oid","2.5.29.37")
loo_Xml.UpdateChildContent("sequence|sequence[2]|asnOctets|sequence|oid","1.3.6.1.5.5.7.3.3")

// This is the subjectKeyIdentifier extension.
// The string "MCzBMQAViXBz8IDt8LsgmJxJ4Xg=" is base64 that decodes to 20 bytes, which is a SHA1 hash.
// This is simply a hash of the DER of the public key.

loo_PubKey = create oleobject
li_rc = loo_PubKey.ConnectToNewObject("Chilkat.PublicKey")

loo_PrivKey.ToPublicKey(loo_PubKey)
loo_BdPubKeyDer = create oleobject
li_rc = loo_BdPubKeyDer.ConnectToNewObject("Chilkat.BinData")

loo_BdPubKeyDer.AppendEncoded(loo_PubKey.GetEncoded(1,"base64"),"base64")
ls_Ski = loo_BdPubKeyDer.GetHash("sha1","base64")

loo_Xml.UpdateChildContent("sequence|sequence[3]|oid","2.5.29.14")
loo_Xml.UpdateChildContent("sequence|sequence[3]|asnOctets|octets",ls_Ski)

// Add the extension request to the CSR
loo_Csr.SetExtensionRequest(loo_Xml)

// Generate the CSR with the extension request
ls_CsrPem = loo_Csr.GenCsrPem(loo_PrivKey)
if loo_Csr.LastMethodSuccess = 0 then
    Write-Debug loo_Csr.LastErrorText
    destroy loo_Ecc
    destroy loo_Prng
    destroy loo_PrivKey
    destroy loo_Csr
    destroy loo_BdTemp
    destroy loo_Xml
    destroy loo_PubKey
    destroy loo_BdPubKeyDer
    return
end if

Write-Debug ls_CsrPem


destroy loo_Ecc
destroy loo_Prng
destroy loo_PrivKey
destroy loo_Csr
destroy loo_BdTemp
destroy loo_Xml
destroy loo_PubKey
destroy loo_BdPubKeyDer