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Duplicate Java Verify RSA Signature
See more RSA Examples
Demonstrates how to duplicate a snippet of Java code that verifies an RSA signature.Chilkat AutoIt Downloads
Local $bSuccess = False
; This requires the Chilkat API to have been previously unlocked.
; See Global Unlock Sample for sample code.
; This example duplicates the following Java code:
; import com.sun.org.apache.xml.internal.security.utils.Base64;
; import java.io.ByteArrayInputStream;
; import java.security.PublicKey;
; import java.security.Signature;
; import java.security.cert.CertificateFactory;
; import java.security.cert.X509Certificate;
; public class validateSazetak {
; public static void main(String[] args) {
; String signatureAlgorithm = "SHA256withRSA";
; String base64DataToBeSigned = "Hlp...LE4=";
; String base64Certificate = "MII...TlQ==";
; String base64Signature = "I00...pZA==";
; try {
; CertificateFactory cf;
; X509Certificate certificate = null;
; cf = CertificateFactory.getInstance("X.509");
; certificate = (X509Certificate) cf.generateCertificate(new
; ByteArrayInputStream(Base64.decode(base64Certificate)));
;
; Signature signature = Signature.getInstance(signatureAlgorithm, "SunRsaSign");
; PublicKey pk = (PublicKey) certificate.getPublicKey();
; signature.initVerify(pk);
;
; byte[] hashBytes = Base64.decode(base64DataToBeSigned);
; signature.update(hashBytes);
;
; byte[] sigBytes = Base64.decode(base64Signature);
; boolean validity = signature.verify(sigBytes);
; System.out.println("Is valid signature:" + validity);
; } catch (Exception e) {
; System.out.println(e);
; }
; }
Local $sBase64DataToBeSigned = "Hlp...LE4="
Local $sBase64Certificate = "MII...TlQ=="
Local $sBase64Signature = "I00...pZA=="
$oCert = ObjCreate("Chilkat.Cert")
$bSuccess = $oCert.LoadFromBase64($sBase64Certificate)
If ($bSuccess = False) Then
ConsoleWrite($oCert.LastErrorText & @CRLF)
Exit
EndIf
$oRsa = ObjCreate("Chilkat.Rsa")
$bSuccess = $oRsa.SetX509Cert($oCert,False)
If ($bSuccess = False) Then
ConsoleWrite($oRsa.LastErrorText & @CRLF)
Exit
EndIf
$oRsa.EncodingMode = "base64"
$bSuccess = $oRsa.VerifyStringENC($sBase64DataToBeSigned,"sha256",$sBase64Signature)
If ($bSuccess = False) Then
ConsoleWrite($oRsa.LastErrorText & @CRLF)
Exit
EndIf
ConsoleWrite("Signature verified." & @CRLF)