POST request to search certificate

[Dominik26-1]

Hi all,
I am trying to retrieve newly created certificate according to subject SN.
I am using API endpoint ejbca-rest-api/v1/certificate/search but response I got is in DER format with string value.
I need to convert and retrieve original information about subject, but I cannot use x509.load_der_x509_certificate(cert_der, default_backend()) python method, because DER format string throwing error :
Traceback (most recent call last):
File "c:\Users\domin\Documents\school\DP\Program\generate_cert.py", line 155, in
cert = x509.load_der_x509_certificate(cert_der, default_backend())
File "C:\Users\domin\AppData\Local\Programs\Python\Python310\lib\site-packages\cryptography\x509\base.py", line 594, in load_der_x509_certificate
return rust_x509.load_der_x509_certificate(data)
ValueError: error parsing asn1 value: ParseError { kind: UnexpectedTag { actual: Tag { value: 13, constructed: false, class: Application } } }

Thanks for advice, how can I get certificate values from response certificate DER string?

[primetomas]

What do you get back? Write it down to a file and inspect it. Perhaps it's base64 encoded?