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> RE: RSA_private_decrypt without e and d
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> Hi Marek,
> My understanding was that while it's mathematically possible, from an
> OpenSSL API perspective there is no way to do it.
om.pl
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 Ma
1 05:21 PM
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> RE: RSA_private_decrypt without e and d
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> Thanks Mounir and Marek, I will try to recover these parameters.
>
> -Original Message-
> Fro
: 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 (an
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" i
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 (and the corresponding dmp1, dmq1) must be
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
Hello,
Try to disable RSA blinding with:
RSA_blinding_off(new_key);
before RSA_private_decrypt().
Best regards,
--
Marek Marcola
owner-openssl-us...@openssl.org wrote on 02/24/2011 03:46:53 AM:
> "Shaheed Bacchus (sbacchus)"
> Sent by: owner-openssl-us...@openssl.org
>
> 02/24/2011 03
gt;
> 02/24/2011 05:50 AM
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> Please respond to
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> Re: RSA_private_decrypt without e and d
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> On Wed, Feb 23, 2011 at 09:03:13PM -0600, Shaheed Bacchus (sb
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 (m
Just to be clear, below is not the actual code, but what I would *like*
to be able to do (or something close).
From: owner-openssl-us...@openssl.org
[mailto:owner-openssl-us...@openssl.org] On Behalf Of Shaheed Bacchus
(sbacchus)
Sent: Wednesday, February 23, 2011 9:47 PM
To: openssl-users@open
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