(PowerShell) Duplicate CSR Created by OpenSSL with Config.cnf

See more CSR Examples

Demonstrates how to duplicate a CSR created by the following commands:

# Generate Private Key
openssl ecparam -name secp256k1 -genkey -noout -out PrivateKey.pem

#Generate CSR
openssl req -new -sha256 -key PrivateKey.pem -extensions v3_req -config Config.cnf -out CSR.csr

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# This example duplicates the CSR created by OpenSSL with the following config file:

# oid_section = OIDs
# [ OIDs ]
# certificateTemplateName= 1.3.6.1.4.1.311.20.2
# 
# [ req ]
# default_bits 	= 2048
# emailAddress 	= it@example.sa
# req_extensions	= v3_req
# x509_extensions 	= v3_ca
# prompt = no
# default_md = sha256
# req_extensions = req_ext
# distinguished_name = dn
# 
# [ v3_req ]
# basicConstraints = CA:FALSE
# keyUsage = digitalSignature, nonRepudiation, keyEncipherment
# 
# [req_ext]
# certificateTemplateName = ASN1:PRINTABLESTRING:ZATCA-Code-Signing
# subjectAltName = dirName:alt_names
# 
# [ dn ]
# CN =EXAMPLE-CORP  				# Common Name
# C=SA									# Country Code e.g SA
# OU=HEAD-OFFICE							# Organization Unit Name
# O=ASC									# Organization Name
# 
# [alt_names]
# SN=1-ASC|2-V01|3-1234567890				# EGS Serial Number 1-ABC|2-PQR|3-XYZ
# UID=312345678900003						# Organization Identifier (VAT Number)
# title=1100								# Invoice Type
# registeredAddress=Dammam  	 			# Address
# businessCategory=IT						# Business Category

# The OpenSSL commands we are duplicating:

# openssl ecparam -name secp256k1 -genkey -noout -out PrivateKey.pem
# openssl req -new -sha256 -key PrivateKey.pem -extensions v3_req -config Config.cnf -out CSR.csr

# The 1st step is to actually use OpenSSL to generate a sample CSR.csr that we wish to duplicate.
# With the sample CSR.csr, we get the ExtensionRequest as XML.  
# For example:

$sbCsr = New-Object Chilkat.StringBuilder
$success = $sbCsr.LoadFile("qa_data/csr/openssl_cnf/CSR.csr","utf-8")
if ($success -eq $false) {
    $("Failed to load CSR.csr")
    exit
}

$csr0 = New-Object Chilkat.Csr
$success = $csr0.LoadCsrPem($sbCsr.GetAsString())
if ($success -eq $false) {
    $($csr0.LastErrorText)
    exit
}

$xml0 = New-Object Chilkat.Xml
$success = $csr0.GetExtensionRequest($xml0)
if ($success -eq $false) {
    $($csr0.LastErrorText)
    exit
}

# Let's examine the extension request..
$($xml0.GetXml())

# <?xml version="1.0" encoding="utf-8"?>
# <set>
#     <sequence>
#         <sequence>
#             <oid>1.3.6.1.4.1.311.20.2</oid>
#             <asnOctets>
#                 <printable>ZATCA-Code-Signing</printable>
#             </asnOctets>
#         </sequence>
#         <sequence>
#             <oid>2.5.29.17</oid>
#             <asnOctets>
#                 <sequence>
#                     <contextSpecific tag="4" constructed="1">
#                         <sequence>
#                             <set>
#                                 <sequence>
#                                     <oid>2.5.4.4</oid>
#                                     <utf8>1-ASC|2-V01|3-1234567890</utf8>
#                                 </sequence>
#                             </set>
#                             <set>
#                                 <sequence>
#                                     <oid>0.9.2342.19200300.100.1.1</oid>
#                                     <utf8>312345678900003</utf8>
#                                 </sequence>
#                             </set>
#                             <set>
#                                 <sequence>
#                                     <oid>2.5.4.12</oid>
#                                     <utf8>1100</utf8>
#                                 </sequence>
#                             </set>
#                             <set>
#                                 <sequence>
#                                     <oid>2.5.4.26</oid>
#                                     <utf8>Dammam</utf8>
#                                 </sequence>
#                             </set>
#                             <set>
#                                 <sequence>
#                                     <oid>2.5.4.15</oid>
#                                     <utf8>IT</utf8>
#                                 </sequence>
#                             </set>
#                         </sequence>
#                     </contextSpecific>
#                 </sequence>
#             </asnOctets>
#         </sequence>
#     </sequence>
# </set>

# If you wish to generate the above XML without going through the above steps, copy the XML into
# the online tool at https://tools.chilkat.io/xmlCreate

# Here is the generated code for the above XML:

$xml = New-Object Chilkat.Xml
$xml.Tag = "set"
$xml.UpdateChildContent("sequence|sequence|oid","1.3.6.1.4.1.311.20.2")
$xml.UpdateChildContent("sequence|sequence|asnOctets|printable","ZATCA-Code-Signing")
$xml.UpdateChildContent("sequence|sequence[1]|oid","2.5.29.17")
$xml.UpdateAttrAt("sequence|sequence[1]|asnOctets|sequence|contextSpecific",$true,"tag","4")
$xml.UpdateAttrAt("sequence|sequence[1]|asnOctets|sequence|contextSpecific",$true,"constructed","1")
$xml.UpdateChildContent("sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set|sequence|oid","2.5.4.4")
$xml.UpdateChildContent("sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set|sequence|utf8","1-ASC|2-V01|3-1234567890")
$xml.UpdateChildContent("sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[1]|sequence|oid","0.9.2342.19200300.100.1.1")
$xml.UpdateChildContent("sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[1]|sequence|utf8","312345678900003")
$xml.UpdateChildContent("sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[2]|sequence|oid","2.5.4.12")
$xml.UpdateChildContent("sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[2]|sequence|utf8","1100")
$xml.UpdateChildContent("sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[3]|sequence|oid","2.5.4.26")
$xml.UpdateChildContent("sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[3]|sequence|utf8","Dammam")
$xml.UpdateChildContent("sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[4]|sequence|oid","2.5.4.15")
$xml.UpdateChildContent("sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[4]|sequence|utf8","IT")

# We'll need a new secp256k1 private key, so let's generate it.
$ecdsa = New-Object Chilkat.Ecc
$prng = New-Object Chilkat.Prng
$privKey = $ecdsa.GenEccKey("secp256k1",$prng)
if ($ecdsa.LastMethodSuccess -eq $false) {
    $($ecdsa.LastErrorText)
    exit
}

$("Generated secp256k1 private key.")

# Use a new CSR object to generate a CSR with the private key and extension request.
$csr = New-Object Chilkat.Csr

# Add the [dn] fields
#  [ dn ]
#  CN =EXAMPLE-CORP  				# Common Name
#  C=SA									# Country Code e.g SA
#  OU=HEAD-OFFICE							# Organization Unit Name
#  O=ASC									# Organization Name
$csr.CommonName = "EXAMPLE-CORP"
$csr.Country = "SA"
$csr.CompanyDivision = "HEAD-OFFICE"
$csr.Company = "ASC"

# Add the extension request to the CSR
$csr.SetExtensionRequest($xml)

# Generate the CSR with the extension request
$csrPem = $csr.GenCsrPem($privKey)
if ($csr.LastMethodSuccess -eq $false) {
    $($csr.LastErrorText)

    exit
}

$($csrPem)

# Sample output:

# -----BEGIN CERTIFICATE REQUEST-----
# MIIBuDCCAV8CAQAwSDEVMBMGA1UEAwwMRVhBTVBMRS1DT1JQMQswCQYDVQQGEwJT
# QTEUMBIGA1UECwwLSEVBRC1PRkZJQ0UxDDAKBgNVBAoMA0FTQzBWMBAGByqGSM49
# AgEGBSuBBAAKA0IABFI5rusr76HiJcMMr1r4L0B0BOAs6azLkt/RwHoT6A0xFRRt
# tulWT40tNhx3qJ4I5ePNgMceOEtuK1kMGVTovI6ggbcwgbQGCSqGSIb3DQEJDjGB
# pjCBozAhBgkrBgEEAYI3FAIEFBMSWkFUQ0EtQ29kZS1TaWduaW5nMH4GA1UdEQR3
# MHWkczBxMSEwHwYDVQQEDBgxLUFTQ3wyLVYwMXwzLTEyMzQ1Njc4OTAxHzAdBgoJ
# kiaJk/IsZAEBDA8zMTIzNDU2Nzg5MDAwMDMxDTALBgNVBAwMBDExMDAxDzANBgNV
# BBoMBkRhbW1hbTELMAkGA1UEDwwCSVQwCgYIKoZIzj0EAwIDRwAwRAIgJnbgpSGb
# diB+0M1VTqc1GU9sFsfnOvVN/8WhWRRxQIwCIF5eH9vgMgXyoU284X8Bx3dqOJ4q
# xashGWci87POxSvT
# -----END CERTIFICATE REQUEST-----