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How are basic constraints used in OpenSSL certificates?
The Basic Constraints extension is used to mark certificates as belonging to a CA, giving them the ability to sign other certificates. Non-CA certificates will either have this extension omitted or will have the value of CA set to FALSE. This extension is critical, which means that all software-consuming certificates must understand its meaning.
When do I use the basic constraints extension?
The “ Basic Constraints ” extension is one way for a CA to control the usage of the certificates it issues. For instance, when the root CA certificate in the example above issued the intermediate CA certificate, it set the Basic Constraints extension to signify that: The issued certificate is for a Certificate Authority, i.e. an intermediate CA.
How are basic constraints used in certificate authority?
The Basic Constraints extension is used to mark certificates as belonging to a CA, giving them the ability to sign other certificates. Non-CA certificates will either have this extension omitted or will have the value of CA set to FALSE.
How to use basic constraints in X.509 v3?
By using extensions such as the Basic Constraints one, the signing CA can enact fine-grained control over how the certificate is used. If the client certificate was used to sign another certificate, that certificate would be rejected by a browser that conformed to the X.509 v3 specifications.
How to create a self signed certificate with OpenSSL?
You do not need to create an OpenSSL configuration file, or any folder structure at all, to create a self-signed certificate using OpenSSL. And here I create a self-signed certificate using OpenSSL from a Bash shell with this “configuration file”, only, it’s not a file — it’s a shell variable:
Why does OpenSSL not accept end entity certificates?
But trying to trusting the end entity certificate directly by putting it into the CA store does not work because the CA store is not a general purpose trust store but limited to CA certificates: With a general purpose trust store the last verification should have succeeded too because the end entity certificate was explicitly declared as trusted.