Chilkat Examples

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

Visual FoxPro Examples

Web API Categories

ASN.1
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
ECC
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
Geolocation
Google APIs
Google Calendar
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
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
REST
REST Misc
RSA Encryption
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(Visual FoxPro) JWS Using HMAC SHA-256

Creates a JSON Web Signatures (JWS) using HMAC SHA-256.

Note: This example requires Chilkat v9.5.0.66 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL lnSuccess
LOCAL loJwsProtHdr
LOCAL loJws
LOCAL lcHmacKey
LOCAL lnSignatureIndex
LOCAL lnBIncludeBom
LOCAL lcPayloadStr
LOCAL lcJwsCompact
LOCAL loJws2
LOCAL v
LOCAL loJoseHeader

*  This requires 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 greater.

*  First create the JWS Protected Header
loJwsProtHdr = CreateObject('Chilkat_9_5_0.JsonObject')
loJwsProtHdr.AppendString("typ","JWT")
loJwsProtHdr.AppendString("alg","HS256")
? "JWS Protected Header: " + loJwsProtHdr.Emit()

*  Output:
*  JWS Protected Header: {"typ":"JWT","alg":"HS256"}

loJws = CreateObject('Chilkat_9_5_0.Jws')

*  Set the HMAC key:
lcHmacKey = "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow"
lnSignatureIndex = 0
loJws.SetMacKey(lnSignatureIndex,lcHmacKey,"base64url")

*  Set the protected header:
loJws.SetProtectedHeader(lnSignatureIndex,loJwsProtHdr)

*  Set the payload.
lnBIncludeBom = 0
lcPayloadStr = "In our village, folks say God crumbles up the old moon into stars."
loJws.SetPayload(lcPayloadStr,"utf-8",lnBIncludeBom)

*  Create the JWS
*  By default, the compact serialization is used.
lcJwsCompact = loJws.CreateJws()
IF (loJws.LastMethodSuccess <> 1) THEN
    ? loJws.LastErrorText
    RELEASE loJwsProtHdr
    RELEASE loJws
    CANCEL
ENDIF

? "JWS: " + lcJwsCompact

*  sample output:
*  JWS: eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu.bsYsi8HJ0N6OqGI1hKQ9QQRNPxxA5qMpcHLtOvXatk8

*  Now load the JWS, validate, and recover the original text.
loJws2 = CreateObject('Chilkat_9_5_0.Jws')

*  Load the JWS.
lnSuccess = loJws2.LoadJws(lcJwsCompact)

*  Set the MAC key used for validation.
lnSignatureIndex = 0
loJws2.SetMacKey(lnSignatureIndex,lcHmacKey,"base64url")

*  Validate the 1st (and only) signature at index 0..
v = loJws2.Validate(lnSignatureIndex)
IF (v < 0) THEN
    *  Perhaps Chilkat was not unlocked or the trial expired..
    ? "Method call failed for some other reason."
    ? loJws2.LastErrorText
    RELEASE loJwsProtHdr
    RELEASE loJws
    RELEASE loJws2
    CANCEL
ENDIF

IF (v = 0) THEN
    ? "Invalid signature.  The MAC key was incorrect, the JWS was invalid, or both."
    RELEASE loJwsProtHdr
    RELEASE loJws
    RELEASE loJws2
    CANCEL
ENDIF

*  If we get here, the signature was validated..
? "Signature validated."

*  Recover the original content:
? loJws2.GetPayload("utf-8")

*  Examine the protected header:
loJoseHeader = loJws2.GetProtectedHeader(lnSignatureIndex)
IF (loJws2.LastMethodSuccess <> 1) THEN
    ? "No protected header found at the given index."
    RELEASE loJwsProtHdr
    RELEASE loJws
    RELEASE loJws2
    CANCEL
ENDIF

loJoseHeader.EmitCompact = 0

? "Protected (JOSE) header:"
? loJoseHeader.Emit()
RELEASE loJoseHeader

*  Output:

*  	Signature validated.
*  	In our village, folks say God crumbles up the old moon into stars.
*  	Protected (JOSE) header:
*  	{
*  	  "typ": "JWT",
*  	  "alg": "HS256"
*  	}

RELEASE loJwsProtHdr
RELEASE loJws
RELEASE loJws2


 

© 2000-2019 Chilkat Software, Inc. All Rights Reserved.