(Lianja) Create PKCS1 RSA Signature with PEM Private Key

See more RSA Examples

Demonstrates how to load a private key from a PEM file and create a PKCS1 RSA digital signature.

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

loPkey = createobject("CkPrivateKey")

// Load the private key from an RSA PEM file:
llSuccess = loPkey.LoadPemFile("pvkey2_rsa.pem")

// Get the private key in XML format:
lcPkeyXml = loPkey.GetXml()

loRsa = createobject("CkRsa")

// Import the private key into the RSA object:
llSuccess = loRsa.ImportPrivateKey(lcPkeyXml)
if (llSuccess <> .T.) then
    ? loRsa.LastErrorText
    release loPkey
    release loRsa
    return
endif

// Get the signature as 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", "md5", "sha256",
// "sha384", and "sha512".
lcHexSig = loRsa.SignStringENC(lcStrData,"sha-1")

? lcHexSig

? "Success!"


release loPkey
release loRsa