Given a XmlNode object, I needed to get the first children node by name. I used the SelectSingleNode method, providing a valid Xpath, but it didn’t work. For example, I need to get the first child node named Signature from the xmlNode It took me a bit of time to realise that the Signature node … [Read more…]
In this post, I showed how to verify XML digital signature or XmlDSig. In this post, I’m going to show how to sign an XML using a signing certificate. For the XmlDSig to be valid, it requires a custom Filter transformation. This tells which node in the XML content to be signed. Then, we add … [Read more…]
I come across a requirement for one of my projects where I need to check if two XML strings are equivalent. They might not be exact match (that would be too easy, a strings compare would do), nor have same namespaces, prefix and child order. Also, I want to be able to exclude certain nodes … [Read more…]
One of my recent tasks at work requires some XML manipulations. This includes reading value of an XML element, changing an element value, reading values of children nodes and reading the outer XML value of an element. In this post, I’m going to show how to do these using XDocument in .Net Core. We’ll use … [Read more…]
In one of my recent projects at work, I have to build a web API which simply returns a XML string as raw XML in the response. The response header also needs to have a content type of text/xml. The endpoint will always returns XML, result is already an XML string and not some objects … [Read more…]
I have a need to override the default namespace and change the root name when serialising object to XML string. I could add XmlType attribute and change the namespace and add XmlRoot attribute for a different root name. However, we have different clients and each requires different namespace and root name. So I need to … [Read more…]
In the previous post, I showed how to verify XML digital signature using SignedXml object from namespace System.Security.Cryptography.Xml. However that method could only verify signatures signed by .Net and fails to verify a valid signature signed via front end using Javascript or a valid signature with custom transform nodes. Chilkat is not a free library … [Read more…]
In my last post, I showed how to read an XML digital signature. In this post, I’m going to show how to verify the XML digital signature to check if it’s valid or not.
For a project I’m working on, I have to read in an XML digital signature – XmlDSig. In this post, I’m going to show how to read an XmlDsig value using SignedXml object from namespace System.Security.Cryptography.Xml. I add a class to hold my signature data The following is the function to read the XmlDsig value
I have a xml string without any namespaces that needs to deserialise to an object that has namespace in XmlType attribute. When I try to deserialise it with XmlSerializer, all my properties are not populated. To fix it, I need to add my own XmlTextReader that will replace it with the namespace from class. I … [Read more…]