Lianja

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. Lianja

llSuccess = .F.

// 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.LoadPkcs8EncryptedFile("privateKey.key","myPassword")

loRsa = createobject("CkRsa")

// Import the private key into the RSA object:
llSuccess = loRsa.UsePrivateKey(loPkey)
if (llSuccess = .F.) then
    ? loRsa.LastErrorText
    release loPkey
    release loRsa
    return
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