(PowerBuilder) RSASSA-PSS Algorithm with SHA256 Hashing

RSA encrypt a SHA256 hash with OAEP padding.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
integer li_Success
oleobject loo_Privkey
oleobject loo_Rsa
string ls_SigStr

li_Success = 0

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

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

// Load the private key object from a PEM file.
// (To load from a PEM string, call LoadPem instead.)
li_Success = loo_Privkey.LoadPemFile("somePath/myPrivateKey.pem")
if li_Success = 0 then
    Write-Debug loo_Privkey.LastErrorText
    destroy loo_Privkey
    return
end if

loo_Rsa = create oleobject
li_rc = loo_Rsa.ConnectToNewObject("Chilkat.Rsa")

// Use RSA-PSS by setting OaepPadding = 1
loo_Rsa.OaepPadding = 1
// Use SHA256
loo_Rsa.OaepHash = "SHA-256"

loo_Rsa.UsePrivateKey(loo_Privkey)

// Generate a base64 signature.
loo_Rsa.EncodingMode = "base64"

ls_SigStr = loo_Rsa.SignStringENC("String to be signed","SHA-256")
if loo_Rsa.LastMethodSuccess = 0 then
    Write-Debug loo_Rsa.LastErrorText
    destroy loo_Privkey
    destroy loo_Rsa
    return
end if

Write-Debug "Signature: " + ls_SigStr


destroy loo_Privkey
destroy loo_Rsa