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RE: RSA_private_decrypt without e and d
Hi Marek,
My understanding was that while it's mathematically possible, from an
OpenSSL API perspective there is no way to do it. Did I misunderstand?
-Original
On Thu, Feb 24, 2011 at 08:15:47AM +0100, Mounir IDRASSI wrote:
Your analysis is not true because the original poster says he has dmp1,
dmq1 and iqmp, not only p and q.
Yes, naturally if the OP has d (or equivalently d mod (p-1) and (q-1),
which are presumed co-prime), he can recover e if he
: RSA_private_decrypt without e and d
Hi Shaheed,
The OpenSSL error you are getting means that OpenSSL decrypted the
ciphered text but couldn't find the PKCS1 padding byte. This means that
the wrong CRT parameters were supplied. Usually this comes from the fact
that the parameters p and q
02/24/2011 05:21 PM
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RE: RSA_private_decrypt without e and d
Thanks Mounir and Marek, I will try to recover these parameters.
-Original Message-
From: owner-openssl-us...@openssl.org
Sent: Thursday, February 24, 2011 11:23 AM
To: openssl-users@openssl.org
Cc: openssl-users@openssl.org; owner-openssl-us...@openssl.org
Subject: RE: RSA_private_decrypt without e and d
Hello,
Remember, you do not need to recover this parameters to decrypt message.
Best regards,
--
Marek Marcola
Hi,
I have a situation where I have a message that has been encrypted via
RSA_public_encrypt. On the receiving end I have the n, p, q, dmp1,
dmq1, and iqmp components (I know it might sound odd that I don't have
the e and d components but that is the case). I'm trying to do
something like:
@openssl.org
Subject: RSA_private_decrypt without e and d
Hi,
I have a situation where I have a message that has been encrypted via
RSA_public_encrypt. On the receiving end I have the n, p, q, dmp1,
dmq1, and iqmp components (I know it might sound odd that I don't have
the e and d components
On Wed, Feb 23, 2011 at 09:03:13PM -0600, Shaheed Bacchus (sbacchus) wrote:
Just to be clear, below is not the actual code, but what I would *like*
to be able to do (or something close).
What you are asking to do is not possible, not because of API limitations,
but as a matter of principle
...@morganstanley.com
Sent by: owner-openssl-us...@openssl.org
02/24/2011 05:50 AM
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Re: RSA_private_decrypt without e and d
On Wed, Feb 23, 2011 at 09:03:13PM -0600, Shaheed Bacchus (sbacchus)
wrote
-openssl-us...@openssl.org
02/24/2011 03:52 AM
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RSA_private_decrypt without e and d
Hi,
I have a situation where I have a message that has been encrypted via
RSA_public_encrypt
Hi Victor,
Your analysis is not true because the original poster says he has dmp1,
dmq1 and iqmp, not only p and q. With these 5 parameters, it is possible
to recover the plain text from the ciphered text thanks to the Chinese
Reminder Transformation (CRT). Moreover, it is possible to recover
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