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OpenPGP Library for .NET Examples

Examples using keys stored in Key store
Generate keys
Export keys
Import keys
Delete key pair
Encrypt file
Decrypt file


Examples with keys located in files
Encrypt file
Decrypt file
Sign file
Verify file
Clear sign file
Sign and Encrypt file
Decrypt and Verify file


Encrypt file
 This sample shows how to encrypt a file with public key stored in a Key store

C#

using System;
using DidiSoft;
 
public class KeyStoreEncryptFile
{
    public static void Demo()
    {
        KeyStore keyStore = new KeyStore(@"DataFiles\key.store", "changeit");
        PGPLib pgp = new PGPLib();
 
        String publicKeyUserId = "support@didisoft.com";
        bool asciiArmor = true;
        bool integrityCheck = true;
        pgp.EncryptFile(@"DataFiles\INPUT.txt",
                        keyStore,
                        publicKeyUserId,
                        @"DataFiles\OUTPUT.pgp",
                        asciiArmor,
                        integrityCheck);            
    }
}


VB.NET

Imports System
Imports DidiSoft
 
Public Class KeyStoreEncryptFile
	Public Shared Sub Demo()
		Dim keyStore As New KeyStore("DataFiles\key.store", "changeit")
		Dim pgp As New PGPLib()
 
		Dim publicKeyUserId As String = "support@didisoft.com"
		Dim asciiArmor As Boolean = True
		Dim integrityCheck As Boolean = True
		pgp.EncryptFile("DataFiles\INPUT.txt", _
						keyStore, _
						publicKeyUserId, _
						"DataFiles\OUTPUT.pgp", _
						asciiArmor, _
						integrityCheck)
	End Sub
End Class

Decrypt File
This sample shows how to decrypt a file with private key stored in a Key store

C#

using System;
using DidiSoft;
 
public class KeyStoreDecryptFile
{
  public static void Demo()
  {
	KeyStore keyStore = new KeyStore(@"DataFiles\key.store", "changeit");
	PGPLib pgp = new PGPLib();	
 
	String privateKeyPassword = "changeit";
        pgp.DecryptFile(@"DataFiles\OUTPUT.pgp",
                        keyStore,
                        privateKeyPassword,
                        @"DataFiles\OUTPUT.txt");
  }
}

VB.NET

Imports System
Imports DidiSoft
 
Public Class KeyStoreDecryptFile
	Public Shared Sub Demo()
		Dim keyStore As New KeyStore("DataFiles\key.store", "changeit")
		Dim pgp As New PGPLib()
 
		Dim privateKeyPassword As String = "changeit"
		pgp.DecryptFile("DataFiles\OUTPUT.pgp", _
                                keyStore, _
                                privateKeyPassword, _
                                "DataFiles\OUTPUT.txt")
	End Sub
End Class

Encrypt file
This example demonstrates OpenPGP file encryption, providing public key stored directly in a file.

C# Source Code

using System.IO;
using DidiSoft;
 
class EncryptDemo {
    public void Demo() {
        PGPLib pgp = new PGPLib();
        bool armor = true;
        bool withIntegrityCheck = false;
        pgp.EncryptFile(@"C:\Test\INPUT.txt",
                        @"C:\Test\public.key",
                        @"C:\Test\OUTPUT.pgp",
                        armor,
                        withIntegrityCheck);
    }
}

VB.NET Source Code

Imports System.IO
Imports DidiSoft
 
Class EncryptDemo
    Public Sub Demo()
        Dim pgp As New PGPLib()
        Dim armor As Boolean = True
        Dim withIntegrityCheck As Boolean = False
        pgp.EncryptFile("C:\Test\INPUT.txt", "C:\Test\public.key", _
                        "C:\Test\OUTPUT.pgp", _
                        armor, _
                        withIntegrityCheck)
    End Sub
End Class

Decrypt file
This example demonstrates OpenPGP file decryption, providing private key stored directly in a file.
The Private key password is needed, in order the key to be used.

C# Source Code

using System;
using DidiSoft;
 
public class DecryptDemo
{
    public void Demo()
    {
        PGPLib pgp = new PGPLib();
        pgp.DecryptFile(@"C:\Test\OUTPUT.pgp",
                        @"C:\Test\private.key",
                        "changeit",
                        @"C:\Test\INPUT.txt");
    }
}

VB.NET Source Code

Imports System
Imports DidiSoft
 
Public Class DecryptDemo
    Public Sub Demo()
        Dim pgp As New PGPLib()
        pgp.DecryptFile("C:\Test\OUTPUT.pgp", _
                        "C:\Test\private.key", _
                        "changeit", _
                        "C:\Test\INPUT.txt")
    End Sub
End Class

Sign File

This example demonstrates OpenPGP signing.

C# Source Code

using System;
using DidiSoft;
 
public class SignDemo
{
    public void Demo()
    {
        PGPLib pgp = new PGPLib();
        bool armor = true;
        pgp.SignFile(@"C:\Test\INPUT.txt",
                     @"C:\Test\private.key",
                     "changeit",
                     @"C:\Test\OUTPUT1.signed",
                     armor);
    }
}

VB.NET Source Code

Imports System
Imports DidiSoft
 
Public Class SignDemo
    Public Sub Demo()
        Dim pgp As New PGPLib()
        Dim asciiArmor As Boolean = True
        pgp.SignFile("C:\Test\INPUT.txt", _
                     "C:\Test\private.key", _
                     "changeit", _
                     "C:\Test\OUTPUT1.signed", _
                     asciiArmor)
    End Sub
End Class

Clear sign File

This example demonstrates OpenPGP clear signing a file using private key stored directly in a file. Clear signing differs from signing that the signature is appended after the data, so the other party can read the file even if they do not use any OpenPGP software.

C# Source Code

using System;
using DidiSoft;
 
class ClearSignFile
{
    public static void Demo()
    {
        PGPLib pgp = new PGPLib();
        pgp.ClearSignFile(@"DataFiles\INPUT.txt",
                          @"DataFiles\private.key",
                          "changeit",
                          "SHA1",
                          @"DataFiles\OUTPUT.sig.txt");
    }
}

VB.NET Source Code

Imports System
Imports DidiSoft
 
Class ClearSignFile
    Public Shared Sub Demo()
        Dim pgp As New PGPLib()
        pgp.ClearSignFile("DataFiles\INPUT.txt", _
                          "DataFiles\private.key", _
                          "changeit", _
                          "SHA256", _
                          "DataFiles\OUTPUT.sig.txt")
    End Sub
End Class

Verify File

This example demonstrates OpenPGP verification.

C# Source Code

using System;
using DidiSoft;
 
public class VerifyDemo
{
    public void Demo()
    {
       PGPLib pgp = new PGPLib();
       bool validSignature = pgp.VerifyFile(@"C:\Test\OUTPUT1.signed",
                                            @"C:\Test\public.key");
 
       Console.WriteLine("Valid Signature: " + validSignature);
    }
}

VB.NET Source Code

Imports System
Imports DidiSoft
 
Public Class VerifyDemo
    Public Sub Demo()
        Dim pgp As New PGPLib()
        Dim validSignature As Boolean = pgp.VerifyFile("C:\Test\OUTPUT1.signed", _
                                                       "C:\Test\public.key")
 
        Console.WriteLine("Valid Signature: " + validSignature)
    End Sub
End Class

Sign and Encrypt file
This example demonstrates One Pass signing and encryption.

C# Source Code

using System;
using DidiSoft;
 
public class SignAndEncrypt
{
    public void Demo()
    {
       PGPLib pgp = new PGPLib();
 
       bool asciiArmor = false;
       bool withIntegrityCheck = false;
       pgp.SignAndEncryptFile(@"C:\Test\INPUT.txt",
                              @"C:\Test\private.key",
                              "changeit",
                              @"C:\Test\public.key",
                              @"C:\Test\OUTPUT.pgp",
                              asciiArmor,
                              withIntegrityCheck);
    }
}

VB.NET Source Code

Imports System
Imports DidiSoft
 
Public Class SignAndEncrypt
    Public Sub Demo()
        Dim pgp As New PGPLib()
 
        Dim asciiArmor As Boolean = False
        Dim withIntegrityCheck As Boolean = False
        pgp.SignAndEncryptFile("C:\Test\INPUT.txt", _
                               "C:\Test\private.key", _
                               "changeit", _
                               "C:\Test\public.key", _
                               "C:\Test\OUTPUT.pgp", _
                               asciiArmor, _
                               withIntegrityCheck)
    End Sub
End Class

Decrypt and Verify file
This example demonstrates OpenPGP decryption and verification of one pass signed and encrypted file.
Having the public key of the other party we decrypt and verify that it is the source of this signed file.

C# Source Code

using System;
using DidiSoft;
 
public class DecryptAndVerify
{
    public void Demo()
    {
        PGPLib pgp = new PGPLib();
        bool validSigning = pgp.DecryptAndVerifyFile(@"C:\Test\OUTPUT.pgp",
                                                     @"C:\Test\private.key",
                                                     "changeit",
                                                     @"C:\Test\public.key",
                                                     @"C:\Test\INPUT.txt");
        Console.WriteLine(validSigning);
    }
}

VB.NET Source Code

Imports System
Imports DidiSoft
 
Public Class DecryptAndVerify
    Public Sub Demo()
        Dim pgp As New PGPLib()
        Dim validSigning As Boolean = pgp.DecryptAndVerifyFile("C:\Test\OUTPUT.pgp", _
                                                               "C:\Test\private.key", _
                                                               "changeit", _
                                                               "C:\Test\public.key", _
                                                               "C:\Test\INPUT.txt")
        Console.WriteLine(validSigning)
    End Sub
End Class

Key pair generation
This example demonstrates OpenPGP Key pair generation. Key pair is stored in the backing file of the KeyStore object, and can be exported with the Export methods.

C# Source Code

using System;
using DidiSoft;
 
public class GenerateKeyPair
{
    public void Test()
    {
        KeyStore ks = new KeyStore(@"C:\Test\key.store", "changeit");
        ks.GenerateKeyPair(1024,
                           "support@didisoft.com",
                           "changeit");
    }
}

VB.NET Source Code

Imports System
Imports DidiSoft
 
Public Class GenerateKeyPair
    Public Sub Test()
        Dim ks As New KeyStore("C:\Test\key.store", "changeit")
        ks.GenerateKeyPair(1024, "support@didisoft.com", "changeit")
    End Sub
End Class

Export public and private key
Keys with the specified userId parameter must be generated or imported before executing Export methods.

C# Source Code

using System;
using DidiSoft;
 
public class ExportKeys
{
    public void Demo()
    {
        KeyStore ks = new KeyStore(@"C:\Test\key.store", "changeit");
        bool asciiArmored = true;
        ks.ExportPrivateKey(@"C:\Test\private_key_exported.pgpkey",
                            "support@didisoft.com",
                            asciiArmored);
        ks.ExportPublicKey(@"C:\Test\public_key_exported.pgpkey",
                           "support@didisoft.com",
                           asciiArmored);
    }
}

VB.NET Source Code

Imports System
Imports DidiSoft
 
Public Class ExportKeys
    Public Sub Demo()
        Dim ks As New KeyStore("C:\Test\key.store", "changeit")
        Dim asciiArmored As Boolean = True
        ks.ExportPrivateKey("C:\Test\private_key_exported.pgpkey", _
                            "support@didisoft.com", _
                            asciiArmored)
        ks.ExportPublicKey("C:\Test\public_key_exported.pgpkey", _
                           "support@didisoft.com", _
                           asciiArmored)
    End Sub
End Class

Import public and private keys
This sample shows how to import keys into a Key store.

C# Code

using System;
using DidiSoft;
 
public class ImportKeys
{
    public static void Demo()
    {
      KeyStore keyStore = new KeyStore("pgp.keystore", "changeit");       
      keyStore.ImportPublicKey("public.pkr");
 
      String privateKeyPassword = "changeit";
      keyStore.ImportPrivateKey("private.skr", privateKeyPassword);   
    }
}   

VB.NET Code

Imports System
Imports DidiSoft
 
Public Class ImportKeys
    Public Shared Sub Demo()
       Dim keyStore As New KeyStore("pgp.keystore", "changeit")
       keyStore.ImportPublicKey("public.key")
 
       String privateKeyPassword = "changeit"
       keyStore.ImportPrivateKey("private.key", privateKeyPassword)
    End Sub
End Class

Delete key pair
This sample shows how to delete key pair from a Key store instance.

C# Source Code

using System;
using DidiSoft;
 
public class DeleteKeyPair
{
  public static void Demo()
  {
    KeyStore ks = new KeyStore(@"DataFiles\key.store", "changeit");
    ks.DeleteKeyPair("demo2@support.com");
  }
}

VB.NET Source Code

Imports System
Imports DidiSoft
 
Public Class DeleteKeyPair
 Public Shared Sub Demo()
   Dim ks As New KeyStore("DataFiles\key.store", "changeit")
   ks.DeleteKeyPair("demo2@didisoft.com")
 End Sub
End Class