PowerBuilder

PKCS7 Sign Text using RSA 2048, SHA256, Base64 Output

See more Digital Signatures Examples

Demonstrates how to sign text using 2048-bit RSA with SHA256, producing PKCS#7 output in Base64. The certificate w/ private key used for signing is loaded from a .p12/.pfx file. PowerBuilder

integer li_rc
long li_Success
oleobject loo_Cert
oleobject loo_Crypt
string ls_TextToSign
string ls_SigBase64

li_Success = 0

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

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

//  Load the cert and private key.  Whatever the private key happens to be,
//  such as RSA or ECC, then Chilkat will use it.  If the private key is 
//  a 2048-bit RSA key, then that's what will be used..
li_Success = loo_Cert.LoadPfxFile("qa_data/pfx/myCertAndKey.p12","password")
if li_Success <> 1 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Cert
    return
end if

loo_Crypt = create oleobject
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")

li_Success = loo_Crypt.SetSigningCert(loo_Cert)
if li_Success <> 1 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Cert
    destroy loo_Crypt
    return
end if

//  Use SHA-256
loo_Crypt.HashAlgorithm = "sha256"

//  Hash the utf-8 byte representation of the string
loo_Crypt.Charset = "utf-8"

//  Return the result in base64
loo_Crypt.EncodingMode = "base64"

//  Sign some text..
ls_TextToSign = "This is the text to be hashed and signed."
ls_SigBase64 = loo_Crypt.OpaqueSignStringENC(ls_TextToSign)
if loo_Crypt.LastMethodSuccess <> 1 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Cert
    destroy loo_Crypt
    return
end if

Write-Debug ls_SigBase64

//  The result:
//  MIIS2wYJKoZIhvcNAQc ... zGeeY4Oxg==


destroy loo_Cert
destroy loo_Crypt