Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

VB.NET UWP/WinRT Examples

Web API Categories

ASN.1
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Azure Cloud Storage
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
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
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
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(VB.NET UWP/WinRT) AES Key Wrap / Unwrap

Demonstrates the AesKeyWrap and AesKeyUnwrap methods that were added to Chilkat v9.5.0.66.

This example implements the AES Key Wrap Algorithm as described in RFC 3394. It demonstrates wrapping and unwrapping the test data provided in the RFC. This example requires Chilkat v9.5.0.66 or later.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' Note: This example requires Chilkat v9.5.0.66 or later.

Dim crypt As New Chilkat.Crypt2

' The KEK is the Key Encryption Key.  It's the AES key that is used
' to wrap another AES key which is called the "Key Data".

' The KEK can be 128-bit, 192-bit, or 256-bit.  
' (In other words, it can be 16 bytes, 24 bytes, or 32 bytes)

' The Key Data must be a multiple of 64-bits in length.  (i.e. a multiple of 8 bytes)
' The AES Key Wrap algorithm can wrap not only AES keys, but any data that is a
' multiple of 8 bytes in size.

Dim kek As String
Dim keyData As String
Dim wrappedKey As String
Dim expected As String
Dim unwrappedKey As String
Dim encoding As String = "hex"

' Use a 128-bit KEK to wrap a 128-bit AES key.
kek = "000102030405060708090A0B0C0D0E0F"
keyData = "00112233445566778899AABBCCDDEEFF"
expected = "1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5"

Debug.WriteLine("---- Use a 128-bit KEK to wrap a 128-bit AES key.")
Debug.WriteLine("kek = " & kek)
Debug.WriteLine("keyData = " & keyData)
Debug.WriteLine("expected = " & expected)
wrappedKey = crypt.AesKeyWrap(kek,keyData,encoding)
Debug.WriteLine("computed = " & wrappedKey)
unwrappedKey = crypt.AesKeyUnwrap(kek,wrappedKey,encoding)
Debug.WriteLine("unwrapped = " & unwrappedKey)
Debug.WriteLine("----")


' Use a 192-bit KEK to wrap a 128-bit AES key.
kek = "000102030405060708090A0B0C0D0E0F1011121314151617"
keyData = "00112233445566778899AABBCCDDEEFF"
expected = "96778B25AE6CA435F92B5B97C050AED2468AB8A17AD84E5D"

Debug.WriteLine("---- Use a 192-bit KEK to wrap a 128-bit AES key.")
Debug.WriteLine("kek = " & kek)
Debug.WriteLine("keyData = " & keyData)
Debug.WriteLine("expected = " & expected)
wrappedKey = crypt.AesKeyWrap(kek,keyData,encoding)
Debug.WriteLine("computed = " & wrappedKey)
unwrappedKey = crypt.AesKeyUnwrap(kek,wrappedKey,encoding)
Debug.WriteLine("unwrapped = " & unwrappedKey)
Debug.WriteLine("----")


' Use a 256-bit KEK to wrap a 128-bit AES key.
kek = "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F"
keyData = "00112233445566778899AABBCCDDEEFF"
expected = "64E8C3F9CE0F5BA263E9777905818A2A93C8191E7D6E8AE7"

Debug.WriteLine("---- Use a 256-bit KEK to wrap a 128-bit AES key.")
Debug.WriteLine("kek = " & kek)
Debug.WriteLine("keyData = " & keyData)
Debug.WriteLine("expected = " & expected)
wrappedKey = crypt.AesKeyWrap(kek,keyData,encoding)
Debug.WriteLine("computed = " & wrappedKey)
unwrappedKey = crypt.AesKeyUnwrap(kek,wrappedKey,encoding)
Debug.WriteLine("unwrapped = " & unwrappedKey)
Debug.WriteLine("----")


' Use a 192-bit KEK to wrap a 192-bit AES key.
kek = "000102030405060708090A0B0C0D0E0F1011121314151617"
keyData = "00112233445566778899AABBCCDDEEFF0001020304050607"
expected = "031D33264E15D33268F24EC260743EDCE1C6C7DDEE725A936BA814915C6762D2"

Debug.WriteLine("---- Use a 192-bit KEK to wrap a 192-bit AES key.")
Debug.WriteLine("kek = " & kek)
Debug.WriteLine("keyData = " & keyData)
Debug.WriteLine("expected = " & expected)
wrappedKey = crypt.AesKeyWrap(kek,keyData,encoding)
Debug.WriteLine("computed = " & wrappedKey)
unwrappedKey = crypt.AesKeyUnwrap(kek,wrappedKey,encoding)
Debug.WriteLine("unwrapped = " & unwrappedKey)
Debug.WriteLine("----")


' Use a 256-bit KEK to wrap a 192-bit AES key.
kek = "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F"
keyData = "00112233445566778899AABBCCDDEEFF0001020304050607"
expected = "A8F9BC1612C68B3FF6E6F4FBE30E71E4769C8B80A32CB8958CD5D17D6B254DA1"

Debug.WriteLine("---- Use a 256-bit KEK to wrap a 192-bit AES key.")
Debug.WriteLine("kek = " & kek)
Debug.WriteLine("keyData = " & keyData)
Debug.WriteLine("expected = " & expected)
wrappedKey = crypt.AesKeyWrap(kek,keyData,encoding)
Debug.WriteLine("computed = " & wrappedKey)
unwrappedKey = crypt.AesKeyUnwrap(kek,wrappedKey,encoding)
Debug.WriteLine("unwrapped = " & unwrappedKey)
Debug.WriteLine("----")


' Use a 256-bit KEK to wrap a 256-bit AES key.
kek = "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F"
keyData = "00112233445566778899AABBCCDDEEFF000102030405060708090A0B0C0D0E0F"
expected = "28C9F404C4B810F4CBCCB35CFB87F8263F5786E2D80ED326CBC7F0E71A99F43BFB988B9B7A02DD21"

Debug.WriteLine("---- Use a 256-bit KEK to wrap a 256-bit AES key.")
Debug.WriteLine("kek = " & kek)
Debug.WriteLine("keyData = " & keyData)
Debug.WriteLine("expected = " & expected)
wrappedKey = crypt.AesKeyWrap(kek,keyData,encoding)
Debug.WriteLine("computed = " & wrappedKey)
unwrappedKey = crypt.AesKeyUnwrap(kek,wrappedKey,encoding)
Debug.WriteLine("unwrapped = " & unwrappedKey)
Debug.WriteLine("----")

' The output:
' 
' 	---- Use a 128-bit KEK to wrap a 128-bit AES key.
' 	kek = 000102030405060708090A0B0C0D0E0F
' 	keyData = 00112233445566778899AABBCCDDEEFF
' 	expected = 1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5
' 	computed = 1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5
' 	unwrapped = 00112233445566778899AABBCCDDEEFF
' 	----
' 	---- Use a 192-bit KEK to wrap a 128-bit AES key.
' 	kek = 000102030405060708090A0B0C0D0E0F1011121314151617
' 	keyData = 00112233445566778899AABBCCDDEEFF
' 	expected = 96778B25AE6CA435F92B5B97C050AED2468AB8A17AD84E5D
' 	computed = 96778B25AE6CA435F92B5B97C050AED2468AB8A17AD84E5D
' 	unwrapped = 00112233445566778899AABBCCDDEEFF
' 	----
' 	---- Use a 256-bit KEK to wrap a 128-bit AES key.
' 	kek = 000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F
' 	keyData = 00112233445566778899AABBCCDDEEFF
' 	expected = 64E8C3F9CE0F5BA263E9777905818A2A93C8191E7D6E8AE7
' 	computed = 64E8C3F9CE0F5BA263E9777905818A2A93C8191E7D6E8AE7
' 	unwrapped = 00112233445566778899AABBCCDDEEFF
' 	----
' 	---- Use a 192-bit KEK to wrap a 192-bit AES key.
' 	kek = 000102030405060708090A0B0C0D0E0F1011121314151617
' 	keyData = 00112233445566778899AABBCCDDEEFF0001020304050607
' 	expected = 031D33264E15D33268F24EC260743EDCE1C6C7DDEE725A936BA814915C6762D2
' 	computed = 031D33264E15D33268F24EC260743EDCE1C6C7DDEE725A936BA814915C6762D2
' 	unwrapped = 00112233445566778899AABBCCDDEEFF0001020304050607
' 	----
' 	---- Use a 256-bit KEK to wrap a 192-bit AES key.
' 	kek = 000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F
' 	keyData = 00112233445566778899AABBCCDDEEFF0001020304050607
' 	expected = A8F9BC1612C68B3FF6E6F4FBE30E71E4769C8B80A32CB8958CD5D17D6B254DA1
' 	computed = A8F9BC1612C68B3FF6E6F4FBE30E71E4769C8B80A32CB8958CD5D17D6B254DA1
' 	unwrapped = 00112233445566778899AABBCCDDEEFF0001020304050607
' 	----
' 	---- Use a 256-bit KEK to wrap a 256-bit AES key.
' 	kek = 000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F
' 	keyData = 00112233445566778899AABBCCDDEEFF000102030405060708090A0B0C0D0E0F
' 	expected = 28C9F404C4B810F4CBCCB35CFB87F8263F5786E2D80ED326CBC7F0E71A99F43BFB988B9B7A02DD21
' 	computed = 28C9F404C4B810F4CBCCB35CFB87F8263F5786E2D80ED326CBC7F0E71A99F43BFB988B9B7A02DD21
' 	unwrapped = 00112233445566778899AABBCCDDEEFF000102030405060708090A0B0C0D0E0F
' 	----
' 

 

© 2000-2022 Chilkat Software, Inc. All Rights Reserved.