Key Vault Certificate content_type

[Jordan0928]

Hello,

I'm frustrated I couldn't determine certificate contentType (pkcs12 or pem) so I can use appropriate mechanisms to parse certificate content into certificate, private key and CA certificates in PEM format.

I am using Azure python SDK to read key vault certificate, private key, and CA in PEM format. The code that I use to decode the content depends on whether the certificate is imported to key vault in PEM or PKCS12 format.

I know "content_type" is used in certificate policy, and adding this to the certificate attributes can simplify my work. I can use "certificate.conten_type" from python to determine the certificate type (pem or pkcs12) similar to other attributes such as certificate.name.

I could use openssl to determine the format of the certificate but it requires extra code and latency. Certificate attribute can solve extra content parsing to determine just type.

[laiapat]

Thanks for opening this issue! As you've noted, a certificate's content type is part of its policy. That's reflected in the Key Vault Certificates library:

>>> cert = client.get_certificate(cert_name)
>>> cert.policy.content_type
<CertificateContentType.pkcs12: 'application/x-pkcs12'>

Is this what you're looking for?

[Jordan0928]

Perfect!!!

I was getting ": AttributeError: 'CertificateProperties' object has no attribute 'policy'". Looks like I was trying to get the content_type from CertificateProperties.

cert_client = CertificateClient(vault_url="https://xxx.vault.azure.net/", credential=credential)
certs = cert_client.list_properties_of_certificates()
for cert in certs:
print(cert.name)
print(cert.policy.content_type)

Modified like you suggested:
cert_client = CertificateClient(vault_url="https://xxx.vault.azure.net/", credential=credential)
certs = cert_client.list_properties_of_certificates()
for cert in certs:
print(cert.name)
mycert = cert_client.get_certificate(cert.name)
print(mycert.policy.content_type)

output:
azureCert
CertificateContentType.pkcs12
azureCert2
CertificateContentType.pem

Thank you!

[laiapat]

You're very welcome; I'm glad you were able to resolve it! I'll go ahead and close this issue.