(Lianja) RSASSA-PSS Algorithm with SHA256 Hashing

RSA encrypt a SHA256 hash with OAEP padding.

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

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llSuccess = .F.

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

loPrivkey = createobject("CkPrivateKey")

// Load the private key object from a PEM file.
// (To load from a PEM string, call LoadPem instead.)
llSuccess = loPrivkey.LoadPemFile("somePath/myPrivateKey.pem")
if (llSuccess = .F.) then
    ? loPrivkey.LastErrorText
    release loPrivkey
    return
endif

loRsa = createobject("CkRsa")
// Use RSA-PSS by setting OaepPadding = .T.
loRsa.OaepPadding = .T.
// Use SHA256
loRsa.OaepHash = "SHA-256"

loRsa.UsePrivateKey(loPrivkey)

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

lcSigStr = loRsa.SignStringENC("String to be signed","SHA-256")
if (loRsa.LastMethodSuccess = .F.) then
    ? loRsa.LastErrorText
    release loPrivkey
    release loRsa
    return
endif

? "Signature: " + lcSigStr


release loPrivkey
release loRsa