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From: gialloporpora <gialloporpora AT gmail DOT com>
Subject: [OpenSSL]Is it possible to show the numerical value of the public and private key's exponent in a certificate
Date: Tue, 26 Jun 2012 13:01:16 +0200
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Dear all,
I am trying to learn how S/MIME encryption/digital signing works.

I would like to show the numerical values assigned to my private and 
public key.

I have converted my personal certificate from p12 to pem, in this way:

openssl pkcs12 -in mycert.p12 -out mycert.pem

Now, I have used this command to show the modulus of the private/public key:

     openssl rsa -in mykey.pem -noout -modulus

and I see an hexadecimal value, now I know that my public key is a data 
like this:

(exp1, modulus)



where modulus is the value above. My private key is:

(exp2, modulus)

where exp1 and exp2 satisfy:

exp1*exp2 ? 1 mod (p-1)(q-1)
modulus=p*q

I would like to know if is it possible to show the numerical values of 
exp1 and exp2 stored in my certificate.


Sandro













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