(Perl) 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

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# 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 = chilkat::CkStringBuilder->new();
$success = $sbCsr->LoadFile("qa_data/csr/openssl_cnf/CSR.csr","utf-8");
if ($success == 0) {
    print "Failed to load CSR.csr" . "\r\n";
    exit;
}

$csr0 = chilkat::CkCsr->new();
$success = $csr0->LoadCsrPem($sbCsr->getAsString());
if ($success == 0) {
    print $csr0->lastErrorText() . "\r\n";
    exit;
}

$xml0 = chilkat::CkXml->new();
$success = $csr0->GetExtensionRequest($xml0);
if ($success == 0) {
    print $csr0->lastErrorText() . "\r\n";
    exit;
}

# Let's examine the extension request..
print $xml0->getXml() . "\r\n";

# <?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 = chilkat::CkXml->new();
$xml->put_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",1,"tag","4");
$xml->UpdateAttrAt("sequence|sequence[1]|asnOctets|sequence|contextSpecific",1,"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 = chilkat::CkEcc->new();
$prng = chilkat::CkPrng->new();
# privKey is a PrivateKey
$privKey = $ecdsa->GenEccKey("secp256k1",$prng);
if ($ecdsa->get_LastMethodSuccess() == 0) {
    print $ecdsa->lastErrorText() . "\r\n";
    exit;
}

print "Generated secp256k1 private key." . "\r\n";

# Use a new CSR object to generate a CSR with the private key and extension request.
$csr = chilkat::CkCsr->new();

# 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->put_CommonName("EXAMPLE-CORP");
$csr->put_Country("SA");
$csr->put_CompanyDivision("HEAD-OFFICE");
$csr->put_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->get_LastMethodSuccess() == 0) {
    print $csr->lastErrorText() . "\r\n";

    exit;
}

print $csrPem . "\r\n";

# Sample output:

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