How should we parse BinarySecurityToken？

ai second 1

Our MDM server received an enrollment request from the client. We got BinarySecurityToken and tried to parse it, but it always went wrong. How do I resolve BinarySecurityToken?
We did it in the following way
certificateSigningRequestDer, err := base64.StdEncoding.DecodeString(binarySecurityToken)
if err != nil {
return nil, err
}
// Decode and verify CSR
csr, err := x509.ParseCertificateRequest(certificateSigningRequestDer)
if err != nil {
panic(err)
}

enrollment-protocol.txt has detailed data

Can you help us resolve this parsing error?[enter code here][1]

Ryan Hill 29,676 Reputation points Microsoft Employee

2020-06-22T21:30:27.81+00:00

Hi @ai second ,

I've retagged your question under secuity center for better visibility. Is the enrollment against clound tenant or on-prem?
ai second 1 Reputation point

2020-06-29T03:08:06.337+00:00

Thanks for your reply, it is clound tenant .We developed according to the documentation here
ai second 1 Reputation point

2020-06-29T07:36:10.797+00:00

We tried to parse BinarySecurityToken, and then responded to Windows10, but still encountered the previous error code..Can you help us to see if the BinarySecurityToken is processed incorrectly? Here is the detailed data

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How should we parse BinarySecurityToken？

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