* [OpenSSL]Is it possible to show the numerical value of the public and private key's exponent in a certificate
@ 2012-06-26 11:03 gialloporpora
2012-06-26 11:59 ` Corinna Vinschen
2012-06-26 13:12 ` Lou Losee
0 siblings, 2 replies; 5+ messages in thread
From: gialloporpora @ 2012-06-26 11:03 UTC (permalink / raw)
To: cygwin
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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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [OpenSSL]Is it possible to show the numerical value of the public and private key's exponent in a certificate
2012-06-26 11:03 [OpenSSL]Is it possible to show the numerical value of the public and private key's exponent in a certificate gialloporpora
@ 2012-06-26 11:59 ` Corinna Vinschen
2012-06-26 22:20 ` gialloporpora
2012-06-26 13:12 ` Lou Losee
1 sibling, 1 reply; 5+ messages in thread
From: Corinna Vinschen @ 2012-06-26 11:59 UTC (permalink / raw)
To: cygwin
On Jun 26 13:01, gialloporpora wrote:
> 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.
Since this is a OpenSSL question, you will probably have more luck
asking on the appropriate openssl-users mailing list:
http://www.openssl.org/support/community.html
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [OpenSSL]Is it possible to show the numerical value of the public and private key's exponent in a certificate
2012-06-26 11:03 [OpenSSL]Is it possible to show the numerical value of the public and private key's exponent in a certificate gialloporpora
2012-06-26 11:59 ` Corinna Vinschen
@ 2012-06-26 13:12 ` Lou Losee
2012-06-26 22:18 ` gialloporpora
1 sibling, 1 reply; 5+ messages in thread
From: Lou Losee @ 2012-06-26 13:12 UTC (permalink / raw)
To: cygwin
From the OpenSSL RSA man page:
To print out the components of a private key to standard output:
openssl rsa -in key.pem -text -noout
Not explicitly in the man page, but from reading it, it appears to get
the components of the private key, the following should work:
openssl rsa -in key.pem -pubin -pubout -text -noout
Lou
Artificial Intelligence is no match for Natural Stupidity
Artificial Intelligence is no match for Natural Stupidity
On Tue, Jun 26, 2012 at 6:01 AM, gialloporpora <gialloporpora@gmail.com> wrote:
>
> 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
>
>
>
>
>
>
>
>
>
>
>
>
>
> --
> Problem reports: http://cygwin.com/problems.html
> FAQ: http://cygwin.com/faq/
> Documentation: http://cygwin.com/docs.html
> Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
>
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Documentation: http://cygwin.com/docs.html
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^ permalink raw reply [flat|nested] 5+ messages in thread
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2012-06-26 11:03 [OpenSSL]Is it possible to show the numerical value of the public and private key's exponent in a certificate gialloporpora
2012-06-26 11:59 ` Corinna Vinschen
2012-06-26 22:20 ` gialloporpora
2012-06-26 13:12 ` Lou Losee
2012-06-26 22:18 ` gialloporpora
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