Questions about code and performance of OpenSSL on Windows 10 64 bit Home edition.

[A Z <poweruserm@xxxxxxxxxxx>]

Dear SSL,

Your encryption kit is fantastic.  I have been using it to build self-signed web certificates

and email certificates.  I have also been using it to encrypt and decrypt messages,

all via RSA, ad aes-256.  I am running OpenSSL using 64 bit Windows 10, which is different

to Linux, a little bit, since I don't have the option in Windows to pipe commands together.

-I can do error checks on rsa private keys.

openssl rsa -check -in private.key -noout

1. How can I do something parallel to this, to do an error check on a public key, so
   that it also replies with a command line message saying whether a public
   key is alright, or not? Or similarly, if I have an rsa private/public key pair,
   in two different files, what openssl command can I run to
   verify if these two keys match one another, accurately?

2. If I have a private key and a .crt web certificate, what openssl command
   can I run to verify if these two files continue to match?

3. If I have a Thunderbird Email certificate, in pkcs12 format, how can I run
   
4. openssl to verify that with the .crt certificate that came before it? 
   
5. 
   
6. And how can I verify between the pkcs12 email certificate and the original private key?
7. If I can do that, depending on the answer to 3) ?
   

Yours Sincerely,

poweruserm.