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(PowerBuilder) Duplicate openssl req -newkey rsa:2048 -nodes -keyout mydomain.pem -out mydomain.csr

Demonstrates how to duplicate this OpenSSL command:

openssl req -newkey rsa:2048 -nodes -keyout mydomain.pem -out mydomain.csr

This command creates 2 files:

  1. mydomain.csr: this is the file to send to DigiCert or Let's Encrypt (or any other CA)
  2. mydomain.pem: this is the private key of the domain.

The second file is needed to pair with the certificate that will later be received from the CA.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Rsa
integer li_Success
oleobject loo_PrivKey
oleobject loo_PrivKeyXml
string ls_KeyModulus
oleobject loo_AsnRoot
oleobject loo_AsnCertReqInfo
oleobject loo_AsnCertSubject
oleobject loo_AsnTemp
oleobject loo_AsnPubKeyInfo
oleobject loo_AsnPubKeyAlgId
oleobject loo_AsnRsaKey
string ls_RsaKeyDerBase64
oleobject loo_BdDer
oleobject loo_BdSig
oleobject loo_AsnAlgId
string ls_CsrBase64

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

loo_Rsa = create oleobject
li_rc = loo_Rsa.ConnectToNewObject("Chilkat_9_5_0.Rsa")
if li_rc < 0 then
    destroy loo_Rsa
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Generate a 2048-bit key.  Chilkat RSA supports
// key sizes ranging from 512 bits to 8192 bits.
li_Success = loo_Rsa.GenerateKey(2048)
if li_Success <> 1 then
    Write-Debug loo_Rsa.LastErrorText
    destroy loo_Rsa
    return
end if

loo_PrivKey = loo_Rsa.ExportPrivateKeyObj()

// Save the private key to unencrypted PKCS8 PEM
li_Success = loo_PrivKey.SavePkcs8PemFile("mydomain.pem")

// (alternatively) Save the private key to encrypted PKCS8 PEM
li_Success = loo_PrivKey.SavePkcs8EncryptedPemFile("myPassword","mydomain_enc.pem")

// We'll need the private key's modulus for the CSR.
// The modulus is not something that needs to be protected.  Most people don't realize
// that a public key is actually just a subset of the private key.  The public parts of
// an RSA private key are the modulus and exponent.  The exponent is always 65537.
loo_PrivKeyXml = create oleobject
li_rc = loo_PrivKeyXml.ConnectToNewObject("Chilkat_9_5_0.Xml")

li_Success = loo_PrivKeyXml.LoadXml(loo_PrivKey.GetXml())

// Get the modulus in base64 format:
ls_KeyModulus = loo_PrivKeyXml.GetChildContent("Modulus")

// --------------------------------------------------------------------------------
// Now build the CSR using Chilkat's ASN.1 API.
// The keyModulus will be embedded within the ASN.1.

// A new ASN.1 object is automatically a SEQUENCE.
// Given that the CSR's root item is a SEQUENCE, we can use
// this as the root of our CSR.
loo_AsnRoot = create oleobject
li_rc = loo_AsnRoot.ConnectToNewObject("Chilkat_9_5_0.Asn")

// Beneath the root, we have a SEQUENCE (the certificate request info), 
// another SEQUENCE (the algorithm identifier), and a BITSTRING (the signature data)

li_Success = loo_AsnRoot.AppendSequence()
li_Success = loo_AsnRoot.AppendSequence()

// ----------------------------------
// Build the Certificate Request Info
// ----------------------------------
loo_AsnCertReqInfo = loo_AsnRoot.GetSubItem(0)
li_Success = loo_AsnCertReqInfo.AppendInt(0)

// Build the Subject part of the Certificate Request Info
loo_AsnCertSubject = loo_AsnCertReqInfo.AppendSequenceR()

// Add each subject part..
loo_AsnTemp = loo_AsnCertSubject.AppendSetR()
li_Success = loo_AsnTemp.AppendSequence2()
// AppendSequence2 updates the internal reference to the newly appended SEQUENCE.
// The OID and printable string are added to the SEQUENCE.
li_Success = loo_AsnTemp.AppendOid("2.5.4.6")
li_Success = loo_AsnTemp.AppendString("printable","US")
destroy loo_AsnTemp

loo_AsnTemp = loo_AsnCertSubject.AppendSetR()
li_Success = loo_AsnTemp.AppendSequence2()
li_Success = loo_AsnTemp.AppendOid("2.5.4.8")
li_Success = loo_AsnTemp.AppendString("utf8","Utah")
destroy loo_AsnTemp

loo_AsnTemp = loo_AsnCertSubject.AppendSetR()
li_Success = loo_AsnTemp.AppendSequence2()
li_Success = loo_AsnTemp.AppendOid("2.5.4.7")
li_Success = loo_AsnTemp.AppendString("utf8","Lindon")
destroy loo_AsnTemp

loo_AsnTemp = loo_AsnCertSubject.AppendSetR()
li_Success = loo_AsnTemp.AppendSequence2()
li_Success = loo_AsnTemp.AppendOid("2.5.4.10")
li_Success = loo_AsnTemp.AppendString("utf8","DigiCert Inc.")
destroy loo_AsnTemp

loo_AsnTemp = loo_AsnCertSubject.AppendSetR()
li_Success = loo_AsnTemp.AppendSequence2()
li_Success = loo_AsnTemp.AppendOid("2.5.4.11")
li_Success = loo_AsnTemp.AppendString("utf8","DigiCert")
destroy loo_AsnTemp

loo_AsnTemp = loo_AsnCertSubject.AppendSetR()
li_Success = loo_AsnTemp.AppendSequence2()
li_Success = loo_AsnTemp.AppendOid("2.5.4.3")
li_Success = loo_AsnTemp.AppendString("utf8","example.digicert.com")
destroy loo_AsnTemp

destroy loo_AsnCertSubject

// Build the Public Key Info part of the Certificate Request Info
loo_AsnPubKeyInfo = loo_AsnCertReqInfo.AppendSequenceR()

loo_AsnPubKeyAlgId = loo_AsnPubKeyInfo.AppendSequenceR()
li_Success = loo_AsnPubKeyAlgId.AppendOid("1.2.840.113549.1.1.1")
li_Success = loo_AsnPubKeyAlgId.AppendNull()
destroy loo_AsnPubKeyAlgId

// The public key itself is a BIT STRING, but the bit string is composed of ASN.1
// for the RSA public key.  We'll first build the RSA ASN.1 for the public key
// (containing the 2048 bit modulus and exponent), and encoded it to DER, and then add
// the DER bytes as a BIT STRING (as a sub-item of asnPubKeyInfo)

// This is already a SEQUENCE..
loo_AsnRsaKey = create oleobject
li_rc = loo_AsnRsaKey.ConnectToNewObject("Chilkat_9_5_0.Asn")

// The RSA modulus is a big integer.
li_Success = loo_AsnRsaKey.AppendBigInt(ls_KeyModulus,"base64")
li_Success = loo_AsnRsaKey.AppendInt(65537)

ls_RsaKeyDerBase64 = loo_AsnRsaKey.GetEncodedDer("base64")

// Now add the RSA key DER as a BIT STRING.
li_Success = loo_AsnPubKeyInfo.AppendBits(ls_RsaKeyDerBase64,"base64")
destroy loo_AsnPubKeyInfo

// The last part of the certificate request info is an empty context-specific constructed item
// with a tag equal to 0.
li_Success = loo_AsnCertReqInfo.AppendContextConstructed(0)

// Get the DER of the asnCertReqInfo.  
// This will be signed using the RSA private key.
loo_BdDer = create oleobject
li_rc = loo_BdDer.ConnectToNewObject("Chilkat_9_5_0.BinData")

li_Success = loo_AsnCertReqInfo.WriteBd(loo_BdDer)

// Add the signature to the ASN.1
loo_BdSig = create oleobject
li_rc = loo_BdSig.ConnectToNewObject("Chilkat_9_5_0.BinData")

li_Success = loo_Rsa.SignBd(loo_BdDer,"SHA1",loo_BdSig)
li_Success = loo_AsnRoot.AppendBits(loo_BdSig.GetEncoded("base64"),"base64")

destroy loo_AsnCertReqInfo

// ----------------------------------
// Finally, add the algorithm identifier, which is the 2nd sub-item under the root.
// ----------------------------------
loo_AsnAlgId = loo_AsnRoot.GetSubItem(1)
li_Success = loo_AsnAlgId.AppendOid("1.2.840.113549.1.1.5")
li_Success = loo_AsnAlgId.AppendNull()
destroy loo_AsnAlgId

// Write the CSR to a DER encoded binary file:
li_Success = loo_AsnRoot.WriteBinaryDer("qa_output/mydomain.csr")
if li_Success <> 1 then
    Write-Debug loo_AsnRoot.LastErrorText
    destroy loo_Rsa
    destroy loo_PrivKeyXml
    destroy loo_AsnRoot
    destroy loo_AsnRsaKey
    destroy loo_BdDer
    destroy loo_BdSig
    return
end if

// It is also possible to get the CSR in base64 format:
ls_CsrBase64 = loo_AsnRoot.GetEncodedDer("base64")

Write-Debug "Base64 CSR:"
Write-Debug ls_CsrBase64

destroy loo_PrivKey


destroy loo_Rsa
destroy loo_PrivKeyXml
destroy loo_AsnRoot
destroy loo_AsnRsaKey
destroy loo_BdDer
destroy loo_BdSig

 

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