Chilkat Examples

ChilkatHOME.NET Core C#Android™AutoItCC#C++Chilkat2-PythonCkPythonClassic ASPDataFlexDelphi ActiveXDelphi DLLGoJavaLianjaMono C#Node.jsObjective-CPHP ActiveXPHP ExtensionPerlPowerBuilderPowerShellPureBasicRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++VB.NETVBScriptVisual Basic 6.0Visual FoxProXojo Plugin

VB.NET Examples

Web API Categories

ASN.1
AWS KMS
AWS Misc
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Key Vault
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Code Signing
Compression
DKIM / DomainKey
DNS
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
Misc
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
SharePoint Online
Signing in the Cloud
Socket/SSL/TLS
Spider
Stream
Tar Archive
ULID/UUID
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(VB.NET) Duplicate Java Verify RSA Signature

Demonstrates how to duplicate a snippet of Java code that verifies an RSA signature.

Chilkat .NET Downloads

Chilkat .NET Assemblies

Chilkat for .NET Core

Chilkat for Mono

' 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);  
'     }  
' } 


Dim base64DataToBeSigned As String = "Hlp...LE4="
Dim base64Certificate As String = "MII...TlQ=="
Dim base64Signature As String = "I00...pZA=="

Dim cert As New Chilkat.Cert
Dim success As Boolean = cert.LoadFromBase64(base64Certificate)
If (success = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


Dim rsa As New Chilkat.Rsa

success = rsa.SetX509Cert(cert,False)
If (success = False) Then
    Debug.WriteLine(rsa.LastErrorText)
    Exit Sub
End If


rsa.EncodingMode = "base64"
success = rsa.VerifyStringENC(base64DataToBeSigned,"sha256",base64Signature)
If (success = False) Then
    Debug.WriteLine(rsa.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Signature verified.")

 

© 2000-2024 Chilkat Software, Inc. All Rights Reserved.