(Visual Basic 6.0) RSA Sign using Base64 Private Key

Signs a string using a non-encrypted RSA private key in base64 encoding. Returns the RSA signature as a base64 string.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

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

Dim privKey As New PrivateKey
Dim success As Long

Dim sbPem As New ChilkatStringBuilder
success = sbPem.AppendLine("-----BEGIN RSA PRIVATE KEY-----",1)
success = sbPem.AppendLine("MIIC .... j5A==",1)
success = sbPem.AppendLine("-----END RSA PRIVATE KEY-----",1)

success = privKey.LoadPem(sbPem.GetAsString())
If (success <> 1) Then
    Debug.Print privKey.LastErrorText
    Exit Sub
End If

Dim rsa As New ChilkatRsa

success = rsa.ImportPrivateKeyObj(privKey)
If (success <> 1) Then
    Debug.Print rsa.LastErrorText
    Exit Sub
End If

rsa.EncodingMode = "base64"
Dim strSigned As String
strSigned = rsa.OpenSslSignStringENC("12345678")
Debug.Print strSigned

Dim strOriginal As String
strOriginal = rsa.OpenSslVerifyStringENC(strSigned)
Debug.Print strOriginal