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(PowerShell) Duplicate Java Verify RSA SignatureDemonstrates how to duplicate a snippet of Java code that verifies an RSA signature.
Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll" # 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); # } # } $base64DataToBeSigned = "Hlp...LE4=" $base64Certificate = "MII...TlQ==" $base64Signature = "I00...pZA==" $cert = New-Object Chilkat.Cert $success = $cert.LoadFromBase64($base64Certificate) if ($success -eq $false) { $($cert.LastErrorText) exit } $rsa = New-Object Chilkat.Rsa $success = $rsa.SetX509Cert($cert,$false) if ($success -eq $false) { $($rsa.LastErrorText) exit } $rsa.EncodingMode = "base64" $success = $rsa.VerifyStringENC($base64DataToBeSigned,"sha256",$base64Signature) if ($success -eq $false) { $($rsa.LastErrorText) exit } $("Signature verified.") |
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