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(Classic ASP) Ibanity HTTP Signature for XS2A, Isabel Connect, Ponto Connect

See more Ibanity Examples

Demonstrates how to add a Signature header for Ibanity HTTP requests.

For more information, see https://documentation.ibanity.com/http-signature

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' In order to sign your HTTP requests, you have to add 2 headers to the HTTP request: Digest: the digest of the request payload and Signature: the actual signature of the request. 

' POST /xs2a/customer-access-tokens HTTP/1.1
' Host: api.ibanity.com
' Content-Type: application/json
' Digest: SHA-512=z4PhNX7vuL3xVChQ1m2AB9Yg5AULVxXcg/SpIdNs6c5H0NE8XYXysP+DGNKHfuwvY7kxvUdBeoGlODJ6+SfaPg==
' Ibanity-Idempotency-Key: 61f02718-eeee-46e1-b5eb-e8fd6e799c2d
' Signature: keyId="62f02718-eeee-46e1-b5eb-e8fd6e799c2e",created=1599659223,algorithm="hs2019",headers="(request-target) host digest (created) ibanity-idempotency-key",signature="SjWJWbWN7i0...zsbM="
' 
' {"data":{"type":"customerAccessToken", "attributes":{"applicationCustomerReference":"15874569"}}}

' The payload (body) of the above HTTP request is the JSON.
' Build the JSON above.
' Use this online tool to generate code from sample JSON: 
' Generate Code to Create JSON
set json = Server.CreateObject("Chilkat_9_5_0.JsonObject")
success = json.UpdateString("data.type","customerAccessToken")
success = json.UpdateString("data.attributes.applicationCustomerReference","15874569")

payload = json.Emit()
Response.Write "<pre>" & Server.HTMLEncode( "payload = " & payload) & "</pre>"

' Step 1: Build the (created) virtual header

set dtNow = Server.CreateObject("Chilkat_9_5_0.CkDateTime")
success = dtNow.SetFromCurrentSystemTime()
created = dtNow.GetAsUnixTimeStr(0)
Response.Write "<pre>" & Server.HTMLEncode( "created = " & created) & "</pre>"

' Step 2: Build the Digest header
set crypt = Server.CreateObject("Chilkat_9_5_0.Crypt2")
crypt.HashAlgorithm = "sha512"
crypt.EncodingMode = "base64"
crypt.Charset = "utf-8"

set sbDigestHdrValue = Server.CreateObject("Chilkat_9_5_0.StringBuilder")
success = sbDigestHdrValue.Append("SHA-512=")
success = sbDigestHdrValue.Append(crypt.HashStringENC(json.Emit()))

Response.Write "<pre>" & Server.HTMLEncode( sbDigestHdrValue.GetAsString()) & "</pre>"

' Step 3: Build the (request target) virtual header

' In order to build the signature you will need a virtual header named (request-target) (the parentheses are important). 
' The (request-target) is the string concatenation of the HTTP method (in lowercase) with the path and query parameters.
request_target = "post /xs2a/customer-access-tokens"

' Step 4: Build the signing string

' The signing string is the concatenation of the signed header names (in lowercase) and values separated by a LF.

' You must always sign the following headers: (request-target), host, (created), digest. 
' If used, you must also sign the authorization header and any ibanity-* headers, such as ibanity-idempotency-key. 

set sbSigningString = Server.CreateObject("Chilkat_9_5_0.StringBuilder")
success = sbSigningString.Append("(request-target): ")
success = sbSigningString.AppendLine(request_target,0)
success = sbSigningString.Append("host: ")
success = sbSigningString.AppendLine("api.ibanity.com",0)
success = sbSigningString.Append("digest: ")
success = sbSigningString.AppendLine(sbDigestHdrValue.GetAsString(),0)
success = sbSigningString.Append("(created): ")
success = sbSigningString.AppendLine(created,0)
success = sbSigningString.Append("ibanity-idempotency-key: ")
idempotencyKey = crypt.GenerateUuid()
success = sbSigningString.Append(idempotencyKey)

' Step 5: Build the signed headers list

' To allow Ibanity to check the signed headers, you must provide a list of the header names. They should be lowercase and in the same order used to create the signing string. 
signed_headers_list = "(request-target) host digest (created) ibanity-idempotency-key"

' Step 6: Build the Signature header

' This is where the real signing happens. The signature header is a combination of several sub-headers -
' 
'     keyId: the identifier for the application's signature certificate, obtained from the Developer Portal
'     algorithm: the digital signature algorithm used to generate the signature (must be hs2019)
'     headers: The list of HTTP headers created in step 5
'     signature: the Base64-encoded digital signature of the signing string created in step 4.

set privKey = Server.CreateObject("Chilkat_9_5_0.PrivateKey")
success = privKey.LoadEncryptedPemFile("my_ibanity_signature_private_key.pem","pem_password")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( privKey.LastErrorText) & "</pre>"
    Response.End
End If

set rsa = Server.CreateObject("Chilkat_9_5_0.Rsa")
rsa.PssSaltLen = 32
rsa.EncodingMode = "base64"
' Use the RSASSA-PSS signature algorithm
rsa.OaepPadding = 1

success = rsa.ImportPrivateKeyObj(privKey)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( rsa.LastErrorText) & "</pre>"
    Response.End
End If

' Sign the signing string.
sigBase64 = rsa.SignStringENC(sbSigningString.GetAsString(),"sha-256")
If (rsa.LastMethodSuccess = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( rsa.LastErrorText) & "</pre>"
    Response.End
End If

' Build the signature header value.
set sbSigHeaderValue = Server.CreateObject("Chilkat_9_5_0.StringBuilder")
success = sbSigHeaderValue.Append("keyId=""")
' Use your identifier for the application's signature certificate, obtained from the Developer Portal
success = sbSigHeaderValue.Append("62f02718-eeee-46e1-b5eb-e8fd6e799c2e")
success = sbSigHeaderValue.Append(""",created=")
success = sbSigHeaderValue.Append(created)
success = sbSigHeaderValue.Append(",algorithm=""hs2019"",headers=""")
success = sbSigHeaderValue.Append(signed_headers_list)
success = sbSigHeaderValue.Append(""",signature=""")
success = sbSigHeaderValue.Append(sigBase64)
success = sbSigHeaderValue.Append("""")

Response.Write "<pre>" & Server.HTMLEncode( sbSigHeaderValue.GetAsString()) & "</pre>"

%>
</body>
</html>

 

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