Visual FoxPro

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. Visual FoxPro

LOCAL lnSuccess
LOCAL loPkey
LOCAL loRsa
LOCAL lcStrData
LOCAL lcHexSig

lnSuccess = 0

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

loPkey = CreateObject('Chilkat.PrivateKey')

* Load the private key from an RSA PEM file:
lnSuccess = loPkey.LoadPkcs8EncryptedFile("privateKey.key","myPassword")

loRsa = CreateObject('Chilkat.Rsa')

* Import the private key into the RSA object:
lnSuccess = loRsa.UsePrivateKey(loPkey)
IF (lnSuccess = 0) THEN
    ? loRsa.LastErrorText
    RELEASE loPkey
    RELEASE loRsa
    CANCEL
ENDIF

* Return the signature in hex
loRsa.EncodingMode = "hex"

lcStrData = "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".
lcHexSig = loRsa.SignStringENC(lcStrData,"sha-1")

? lcHexSig

RELEASE loPkey
RELEASE loRsa