AutoIt Requires Chilkat v11.0.0+

RSA SHA256 Signature using Private Key from Java Keystore

See more RSA Examples

Signs plaintext using RSA SHA256 using a key from a Java keystore.

Duplicatest this code:

KeyStore keystore; // key repository for keys containing signature certificate
String alias; // alias for the certificate in the key repository
String password; // password for the certificate's private key
String plaintext; // text being signed


Signature signature = Signature.getInstance("SHA256withRSA");
signature.initSign((PrivateKey) keystore.getKey(alias, password.toCharArray()));
signature.update(plaintext.getBytes("UTF-8"));
byte[] rsa_text= signature.sign();

AutoIt

Local $bSuccess = False

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

$oJks = ObjCreate("Chilkat.JavaKeyStore")

Local $sJksPassword = "secret"

;  Load the Java keystore from a file.  The JKS file password is used
;  to verify the keyed digest that is found at the very end of the keystore.
;  It verifies that the keystore has not been modified.
$bSuccess = $oJks.LoadFile($sJksPassword,"qa_data/jks/sample_secret.jks")
If ($bSuccess = False) Then
    ConsoleWrite($oJks.LastErrorText & @CRLF)
    Exit
EndIf

;  Get the private key from the JKS.
;  The private key password may be different than the file password.
Local $sPrivKeyPassword = "secret"
Local $bCaseSensitive = False
$oPrivKey = ObjCreate("Chilkat.PrivateKey")
$bSuccess = $oJks.PrivateKeyOf($sPrivKeyPassword,"some.alias",$bCaseSensitive,$oPrivKey)
If ($bSuccess = False) Then
    ConsoleWrite($oJks.LastErrorText & @CRLF)
    Exit
EndIf

;  Establish the RSA object and tell it to use the private key..
$oRsa = ObjCreate("Chilkat.Rsa")

$bSuccess = $oRsa.UsePrivateKey($oPrivKey)
If ($bSuccess = False) Then
    ConsoleWrite($oRsa.LastErrorText & @CRLF)
    Exit
EndIf

;  Indicate we'll be signing the utf-8 byte representation of the string..
$oRsa.Charset = "utf-8"

;  Sign some plaintext using RSA-SHA256
Local $oBinarySignature
Local $sPlaintext = "this is the text to be signed"
$oBinarySignature = $oRsa.SignString($sPlaintext,"SHA256")
If ($oRsa.LastMethodSuccess = False) Then
    ConsoleWrite($oRsa.LastErrorText & @CRLF)
    Exit
EndIf

;  Alternatively, if the signature is desired in some encoded string form,
;  such as base64, base64-url, hex, etc.
$oRsa.EncodingMode = "base64-url"
Local $signatureStr = $oRsa.SignStringENC($sPlaintext,"SHA256")
ConsoleWrite("base64-url RSA signature: " & $signatureStr & @CRLF)