PowerBuilder

RSA Sign with PKCS8 Encrypted Key

See more RSA Examples

Demonstrates how to load a private key from an encrypted PKCS8 file and create an RSA digital signature. PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Pkey
oleobject loo_Rsa
string ls_StrData
string ls_HexSig

li_Success = 0

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

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

// Load the private key from an RSA PEM file:
li_Success = loo_Pkey.LoadPkcs8EncryptedFile("privateKey.key","myPassword")

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

// Import the private key into the RSA object:
li_Success = loo_Rsa.UsePrivateKey(loo_Pkey)
if li_Success = 0 then
    Write-Debug loo_Rsa.LastErrorText
    destroy loo_Pkey
    destroy loo_Rsa
    return
end if

// Return the signature in hex
loo_Rsa.EncodingMode = "hex"

ls_StrData = "This is the string to be signed."

// Sign the string using the sha-1 hash algorithm.
// Other valid choices are "md2", "sha256", "sha384", "sha512",  and "md5".
ls_HexSig = loo_Rsa.SignStringENC(ls_StrData,"sha-1")

Write-Debug ls_HexSig


destroy loo_Pkey
destroy loo_Rsa