B4X Requires Chilkat v11.0.0+

Generate a CSR with SAN (Subject Alternative Name) Extension

See more CSR Examples

Demonstrates how to generate a private key and a Certificate Signing Request (CSR) that includes the SAN extension. B4X

Dim success As Boolean = False

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

'  First generate an RSA private key.
'  (It is also possible to create CSRs based on ECDSA private keys..)
Dim rsa As ChilkatRsa
rsa.Initialize

'  Generate a random 2048-bit RSA key.
Dim privKey As ChilkatPrivateKey
privKey.Initialize("privKey")
success = rsa.GenKey(2048, privKey)
If success = False Then
    Log(rsa.LastErrorText)
    Return
End If


'  Create the CSR object and set properties.
Dim csr As ChilkatCsr
csr.Initialize

'  Specify the Common Name. 
csr.CommonName = "mysubdomain.mydomain.com"

'  Country Name (2 letter code)
csr.Country = "GB"

'  State or Province Name (full name)
csr.State = "Yorks"

'  Locality Name (eg, city)
csr.Locality = "York"

'  Organization Name (eg, company)
csr.Company = "Internet Widgits Pty Ltd"

'  Organizational Unit Name (eg, secion/division)
csr.CompanyDivision = "IT"

'  Email address
csr.EmailAddress = "support@mydomain.com"

'  Add Subject Alternative Names
'  (The AddSan method is added in Chilkat v9.5.0.84)
'  Call AddSan for each alternative name.
success = csr.AddSan("dnsName", "mydomain.com")
success = csr.AddSan("dnsName", "mysubdomain.mydomain.com")
success = csr.AddSan("ipAddress", "192.168.0.123")

'  Create the CSR using the private key.
Dim pemStr As String = csr.GenCsrPem(privKey)
If csr.LastMethodSuccess <> True Then
    Log(csr.LastErrorText)
    Return
End If


'  Save the private key and CSR to a files.
privKey.SavePkcs8EncryptedPemFile("password", "qa_output/privKey1.pem")

Dim fac As ChilkatFileAccess
fac.Initialize
fac.WriteEntireTextFile("qa_output/csr1.pem", pemStr, "utf-8", False)

'  Show the CSR.
Log(pemStr)

'  Sample output:

'  	-----BEGIN CERTIFICATE REQUEST-----
'  	MIIC6jCCAdICAQAwgaQxITAfBgNVBAMMGG15c3ViZG9tYWluLm15ZG9tYWluLmNv
'  	bTELMAkGA1UEBhMCR0IxDjAMBgNVBAgMBVlvcmtzMQ0wCwYDVQQHDARZb3JrMSEw
'  	HwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxCzAJBgNVBAsMAklUMSMw
'  	IQYJKoZIhvcNAQkBFhRzdXBwb3J0QG15ZG9tYWluLmNvbTCCASIwDQYJKoZIhvcN
'  	AQEBBQADggEPADCCAQoCggEBALnQ0un/wF8whk+gPuiAlf3qvx14jgAOV6Erm6EB
'  	H7WACPCpnKcm/8KP+7uoPiwRQaENhMeCgf45vcivl2p6aAn/spLXyEkXyw2d8wFb
'  	YYAGRkiz4Xf7ASJiKuwcOtORz+sSDzgtdfokHfXU1cYeFE2yQhSdLUY5fMn425+g
'  	KoEEsRSjSDe6AKru4+4iGNrLKd8pB9IA5/jOE139IkWlB9r5fEPD5bUTsgqXk9eb
'  	68O0gc712V2eZK07N24lDmFC4bIMTD4csDWocR5hFHXj7NX7c8sOBDcpEb9mPIk4
'  	elxubnhkfnjhOi4J3lDHcT/0ALnbLhf9LnaiKqs+5VcVZvECAwEAAaAAMA0GCSqG
'  	SIb3DQEBBQUAA4IBAQC0AETLIcP3foh5nbu2hVFS8uCUNZ5hEIR1eXmYZmZoBQq2
'  	26ZAoT4CZwixlggC+n7WvAXJ5Pzxpl4wLV4loTiQzaKPX1w0ERo5ZRwLy0n56oG2
'  	6QG+WTViT1C8rlgtVwkCFNOXr0kSSRs8FdaPllqKxK1hxYSL7zwNpumsk39F2cDt
'  	vhcekvH0V3BuGrQFm3dKN/0azW6GOod9+Vq4VzSyOe3kp15oxLBsZOFOu/REujcw
'  	Tzu2jt1asQKUm60CZ9wNHpYepR0Ww40uP1slbehEaFDa6V8b60/tlHHmBbJ4/fy5
'  	hJnYCvjzFz4O9VtT+JtP9ldRHWV3KpZ8ne3AjD+F
'  	-----END CERTIFICATE REQUEST-----