How can I retrieve the key's name from an EncryptedData node?

[elseifthen]

I tried to use xmlSecFindNode(node_ptr, xmlSecNodeKeyName, xmlSecEncNs) on the EncryptedData xml node (see snippet below) to get the child node KeyName whose content is the key's name stored upon encryption of the xml file. However, EncryptedData has no xml children but its content seems to be interpreted as text (probably defined by the Type attribute):

<EncryptedData xmlns="http://www.w3.org/2001/04/xmlenc#" Type="http://www.w3.org/2001/04/xmlenc#Content">
<EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#aes256-cbc"/>
<KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
<EncryptedKey xmlns="http://www.w3.org/2001/04/xmlenc#">
<EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-oaep-mgf1p"/>
<KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
<KeyName>0a40e2bc</KeyName>
</KeyInfo>
<CipherData>
<CipherValue>
…
</EncryptedData>

I can't figure out how to get to the content of the KeyName tag, i.e. how to retrieve the string 0a40e2bc without manually parsing the text contained in the EncryptedData node. Can anyone help me on this?

[elseifthen]

Ah, I had the wrong namespace! With xmlSecFindNode(node_ptr, xmlSecNodeKeyName, xmlSecDSigNs) it works as expected.

[lsh123]

Great that you figured it out!