Hello All, I’m working on SSL / TLS implementation in Squeak and
I need some help understanding RSA. It appears that our RSA implementation has an
encodingParameter. I see what it’s doing but now I’m confused
and was hoping that someone could explain this to me. I see that the parameter is needs to be the same for
encrypting and decrypting, or it doesn’t work. My question is how is this stored on a certificate? Here is the MS Export format http://msdn.microsoft.com/library/default.asp?url=/library/en-us/seccrypto/security/private_key_blobs.asp
I also noticed that : http://en.wikipedia.org/wiki/RSA For reasons of efficiency sometimes a
different form of the private key
(including CRT parameters) is
stored:
Does this mean that the parameter is the coefficient? Is
the CRT parameter the encoding parameter? Any help would be very much appreciated,
I’m having trouble understanding the differences, and how the parameter
is supposed to be used. Thanks! Ron Teitelbaum _______________________________________________ Cryptography mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
Thank you Matt! Ron From: Matthew S.
Hamrick [mailto:[hidden email]] Hey Ron... I haven't been looking too closely at the official crypto source, so I
can't say for sure. But from the sound of it, maybe it's the message encoding
scheme for the RSA signature. There are two main encoding schemes: PKCS#1 and
OAEP, though PKCS#1 now includes OAEP as an option. There's also ISO9697, but
I've never seen it used in conjunction with X.509. If this is the encoding
scheme, then it can be found in the ALGO oid in the SubjectPublicKeyInfo
portion of the cert. Hope this helps. -Cheers -Matt H. On Aug 16, 2006, at 8:21 PM, Ron Teitelbaum wrote:
Hello All, I’m working
on SSL / TLS implementation in Squeak and I need some help understanding RSA. It appears
that our RSA implementation has an encodingParameter. I see what it’s
doing but now I’m confused and was hoping that someone could explain this to me. I see that
the parameter is needs to be the same for encrypting and decrypting, or it
doesn’t work. My question
is how is this stored on a certificate? Here is the
MS Export format http://msdn.microsoft.com/library/default.asp?url=/library/en-us/seccrypto/security/private_key_blobs.asp
I also noticed that : http://en.wikipedia.org/wiki/RSA For reasons of efficiency sometimes a
different form of the private key
(including CRT parameters) is
stored:
Does
this mean that the parameter is the coefficient? Is the CRT parameter the
encoding parameter? Any help would be very much appreciated, I’m having
trouble understanding the differences, and how the parameter is supposed to be
used. Thanks! Ron
Teitelbaum _______________________________________________ Cryptography mailing list _______________________________________________ Cryptography mailing list [hidden email] http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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