Visual Basic 6.0
Visual Basic 6.0
Create Enveloping XML Signature with Multiple References
See more XML Digital Signatures Examples
Demonstrates how to create an enveloping XML digital signature containing multiple Object references.Chilkat Visual Basic 6.0 Downloads
Dim success As Long
success = 0
' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.
' This example creates an XML signature that contains three Objects:
'
' 1. A base64 encoded JPG image.
' 2. Some plain text.
' 3. Some JSON.
'
' Get a small JPG image.
Dim jpgData As New ChilkatBinData
Dim http As New ChilkatHttp
success = http.QuickGetBd("https://www.chilkatsoft.com/images/starfish.jpg",jpgData)
If (success <> 1) Then
Debug.Print http.LastErrorText
Exit Sub
End If
' Get a small JSON document.
Dim sbJson As New ChilkatStringBuilder
success = http.QuickGetSb("https://www.chilkatsoft.com/exampleData/sample.json",sbJson)
If (success <> 1) Then
Debug.Print http.LastErrorText
Exit Sub
End If
' Get an RSA private key for signing.
Dim sbPem As New ChilkatStringBuilder
success = http.QuickGetSb("https://www.chilkatdownload.com/example_data/rsaprivkey_secret.pem",sbPem)
If (success <> 1) Then
Debug.Print http.LastErrorText
Exit Sub
End If
Dim rsaKey As New PrivateKey
success = rsaKey.LoadEncryptedPem(sbPem.GetAsString(),"secret")
If (success <> 1) Then
Debug.Print rsaKey.LastErrorText
Exit Sub
End If
' OK.. ready to begin building the signature.
Dim gen As New ChilkatXmlDSigGen
' Provide the RSA key to the XML Digital Signature generator
success = gen.SetPrivateKey(rsaKey)
' Add enveloped references to the content to be signed.
Dim sbContent As New ChilkatStringBuilder
success = sbContent.Append("The quick brown fox jumped over the lazy dog.")
success = gen.AddEnvelopedRef("aaa",sbContent,"sha256","C14N","")
success = gen.AddEnvelopedRef("bbb",sbJson,"sha256","C14N","")
Dim sbBase64 As New ChilkatStringBuilder
' Use "base64_mime" to encode the JPG data to base64 in multiple lines.
success = jpgData.GetEncodedSb("base64_mime",sbBase64)
success = gen.AddEnvelopedRef("ccc",sbBase64,"sha256","C14N","")
' Generate the XML digital signature.
Dim sbXml As New ChilkatStringBuilder
success = gen.CreateXmlDSigSb(sbXml)
If (success <> 1) Then
Debug.Print gen.LastErrorText
Exit Sub
End If
' Examine the enveloped signature, where the data for each reference is contained within the XML Signature
Debug.Print sbXml.GetAsString()
' The exact XML signature looks like this:
' (A pretty-printed XML signature is shown further below, but beware that the introduced whitespace breaks the signature.)
' <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"><ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/><ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/><ds:Reference URI="#aaa"><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/><ds:DigestValue>f0KK1a9yt2XMxCcr5Keziiv4BpAev/rRt/CGSJwS9i0=</ds:DigestValue></ds:Reference><ds:Reference URI="#bbb"><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/><ds:DigestValue>buBASaqBjJXez8r/hFz4ZIIf+1mgf63AoI8MihViJtU=</ds:DigestValue></ds:Reference><ds:Reference URI="#ccc"><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/><ds:DigestValue>+9PN/3Bz7xOuqi/wIBlGHEwPx+YUoILMsr2Iu0i1cCU=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>fI9l6/CKuwa7J2cczBzsKTOKec6cOVX/ehY2RcDZreGJlSo8bgv++nliFTwPyiZ8GT1Q2rDrA8biOt/ysZWnfim6AR79ld9CtLuKdqNsS/aSjwroDG/eWM0447zWoDSgAIsjXUAsF5xLschFW7+pGoPl5S1fVT/PUBkySlBi0I/U8P2UdiY8GoAL2rkHxTxDHaWh1GpBY28o9MSCuTgTiLVHF6WbmdHggqMc70OSTRh5vCMzZRTaAkTH6SWYt2WczKwmVea7hkM3BhpbA3EnpEIxK7TFl2GkFGXxAyXAxe2SVmXngt025LOFtU72fE+eChbqr5tejWl81z1g2F7ZnQ==</ds:SignatureValue><ds:KeyInfo><ds:KeyValue><ds:RSAKeyValue><ds:Modulus>sXeRhM55P13FbpNcXAMR3olbw2Wa6keZIHu5YTZYUBTlYWId+pNiwUz3zFIEo+0IfYR0H27ybIycQO+1IIzJofUFNMAL3tZps2OKPlsjuCPls6kXpXhv/gvhux8LrCtp4PcKWqJ6QVOZKChc7WAx40qFWzHi57ueqRTv3x0kESqGg/VjsqyTEvb55psJO2RsfhLT7+YVh3hImRM3RDaJdkTkPuOxeFyT6N7VXD09329sLuS3QkUbE9zEKDnz9X3d8dEQdJhSI9ba5fxl8R7fu8pB67ElfzFml96X1jLFtzy1pzOT5Fc4ROcaqlYckVzdBq9sxezm6MYmDBjNAcibRw==</ds:Modulus><ds:Exponent>AQAB</ds:Exponent></ds:RSAKeyValue></ds:KeyValue></ds:KeyInfo><ds:Object Id="aaa">The quick brown fox jumped over the lazy dog.</ds:Object><ds:Object Id="bbb">{
' "apple": "red",
' "lime": "green",
' "banana": "yellow",
' "broccoli": "green",
' "strawberry": "red"
' }
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