B4X Requires Chilkat v11.0.0+
B4X
Generate a CSR containing an Extension Request
See more CSR Examples
Demonstrates how to generate a CSR containing a 1.2.840.113549.1.9.14 extensionRequest.Chilkat B4X Downloads
Dim success As Boolean = False
' 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.
Dim ecc As ChilkatEcc
ecc.Initialize
Dim prng As ChilkatPrng
prng.Initialize
Dim privKey As ChilkatPrivateKey
privKey.Initialize("privKey")
success = ecc.GenKey("secp256r1", prng, privKey)
If success = False Then
Log("Failed to generate a new ECDSA private key.")
Return
End If
Dim csr As ChilkatCsr
csr.Initialize
' Add common CSR fields:
csr.CommonName = "mysubdomain.mydomain.com"
csr.Country = "GB"
csr.State = "Yorks"
csr.Locality = "York"
csr.Company = "Internet Widgits Pty Ltd"
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>
' <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>334623324234325</utf8>
' </sequence>
' </set>
' <set>
' <sequence>
' <oid>0.9.2342.19200300.100.1.1</oid>
' <utf8>310122393500003</utf8>
' </sequence>
' </set>
' <set>
' <sequence>
' <oid>2.5.4.12</oid>
' <utf8>0000</utf8>
' </sequence>
' </set>
' <set>
' <sequence>
' <oid>2.5.4.26</oid>
' <utf8>Sample E</utf8>
' </sequence>
' </set>
' <set>
' <sequence>
' <oid>2.5.4.15</oid>
' <utf8>Sample Business</utf8>
' </sequence>
' </set>
' </sequence>
' </contextSpecific>
' </sequence>
' </asnOctets>
' </sequence>
' </sequence>
' </set>
' Use this online tool to generate code from sample XML:
' Generate Code to Create XML
' Here's the code to generate the above extension request.
Dim xml As ChilkatXml
xml.Initialize
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", "334623324234325")
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", "310122393500003")
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", "0000")
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", "Sample E")
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", "Sample Business")
' Add the extension request to the CSR
csr.SetExtensionRequest(xml)
' Generate the CSR with the extension request
Dim csrPem As String = csr.GenCsrPem(privKey)
If csr.LastMethodSuccess = False Then
Log(csr.LastErrorText)
Return
End If
Log(csrPem)
' Sample PEM output:
' -----BEGIN CERTIFICATE REQUEST-----
' MIICEjCCAbkCAQAwgZcxITAfBgNVBAMMGG15c3ViZG9tYWluLm15ZG9tYWluLmNv
' bTELMAkGA1UEBhMCR0IxDjAMBgNVBAgMBVlvcmtzMQ0wCwYDVQQHDARZb3JrMSEw
' HwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxIzAhBgkqhkiG9w0BCQEW
' FHN1cHBvcnRAbXlkb21haW4uY29tMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE
' g8EVNSV0ttlM9kG2E+J3ZB9WEDYVf2QA/8idrPRUafia1CHjd1kslwZA8eP2bAcf
' 2O493QAENqtW6DTHJbRz8KCBvjCBuwYJKoZIhvcNAQkOMYGtMIGqMCEGCSsGAQQB
' gjcUAgQUExJaQVRDQS1Db2RlLVNpZ25pbmcwgYQGA1UdEQR9MHukeTB3MRgwFgYD
' VQQEDA8zMzQ2MjMzMjQyMzQzMjUxHzAdBgoJkiaJk/IsZAEBDA8zMTAxMjIzOTM1
' MDAwMDMxDTALBgNVBAwMBDAwMDAxETAPBgNVBBoMCFNhbXBsZSBFMRgwFgYDVQQP
' DA9TYW1wbGUgQnVzaW5lc3MwCgYIKoZIzj0EAwIDRwAwRAIgF7D30eSBklfo+oel
' 1B0z64eJDB9MB3rCoiFZlj+mz0YCIHYI87eyqdtw2LOcAoBRhyxlBT6i28+Z/8t9
' bYsMIYvp
' -----END CERTIFICATE REQUEST-----