Hi Jeff, I am sorry for the previous email. Actually, I somehow skipped RSAdumpkeys example. Now, I am able to get e and n through that example code. Thanks. And, just one simple (maybe stupid) query : I am using SignatureScheme of RSA and that example code uses EncryptionScheme objects. Components e and n of public key will always be same irrespective of the scheme I use. But, will it be odd if I use EncryptionScheme objects in SignatureScheme RSA code I am trying to extract?
Thanks. ~Rohit~ On Mar 4, 10:57 am, Rohit <[EMAIL PROTECTED]> wrote: > Hi Jeff, > > Thanks for the reply. > > But, this is not what I am looking for. I generated public key from > crypto++ as given below: > > 30819D300D06092A864886F70D010101050003818B0030818702818100CE3F3FDBDFF5F4585982BFE82F5F0B28ED5A6FEFD296FF9EBAD1EB3BF558180BCAD5CAF3E03F38173210C4C23EA8BB8BF7AA486B3172B4153E41365072109F6B5C34DFAE2E218B36BF02E7826BEFC177F44837D4D7531123F6D119197F4D46050B59B9462E9D451787ABF55687BA693EE8DA8E179FD9063B450F6B71CB03284D020111 > > I fed this public key (alongwith message and signature) into > RSAVerifyFile API (in test.cpp). I want to know how crypto++ > separates e and n from this and feeds into a_exp_b_mod_c func in > RSAFunction::ApplyFunction (in rsa.cpp) so as to verify a given > signature? > > Thanks. > > ~Rohit~ > > On Mar 3, 8:36 pm, "Jeffrey Walton" <[EMAIL PROTECTED]> wrote: > > > Hi Rohit, > > >http://www.cryptopp.com/wiki/RSA > > > Jeff > > > On 3/3/08, Rohit <[EMAIL PROTECTED]> wrote: > > > > Hi All, > > > > I am interested in extracting RSA code from Crypto++. I want to verify > > > signature (of hash of some file) using RSAVerifyFile API. I would like > > > to know how are public exponent (e) and modulus (n) extracted from the > > > public key fed to RSAVerifyFile. RSAFunction::ApplyFunction contains > > > a_exp_b_mod_c which basically performs (a^b mod c) using signature, e > > > and n. Can anyone please tell from where and how e and n are coming > > > actually? > > > > Thanks a lot! > > > > ~Rohit~ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the "Crypto++ Users" Google Group. To unsubscribe, send an email to [EMAIL PROTECTED] More information about Crypto++ and this group is available at http://www.cryptopp.com. -~----------~----~----~----~------~----~------~--~---
