B4X Requires Chilkat v11.0.0+

RSASSA-PSS Algorithm with SHA256 Hashing

See more RSA Examples

RSA encrypt a SHA256 hash with OAEP padding. B4X

Dim success As Boolean = False

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

Dim privkey As ChilkatPrivateKey
privkey.Initialize("privkey")

'  Load the private key object from a PEM file.
'  (To load from a PEM string, call LoadPem instead.)
success = privkey.LoadPemFile("somePath/myPrivateKey.pem")
If success = False Then
    Log(privkey.LastErrorText)
    Return
End If


Dim rsa As ChilkatRsa
rsa.Initialize
'  Use RSA-PSS by setting PkcsPadding = False
rsa.PkcsPadding = False
'  Use SHA256
rsa.OaepHash = "SHA-256"

rsa.UsePrivateKey(privkey)

'  Generate a base64 signature.
rsa.EncodingMode = "base64"

Dim sigStr As String = rsa.SignStringENC("String to be signed", "SHA-256")
If rsa.LastMethodSuccess = False Then
    Log(rsa.LastErrorText)
    Return
End If


Log("Signature: " & sigStr)