I think I understand a little better now what GCM does. Probably what I'm looking for is XTS; but this doesn't appear supported in cryptopp (?).
On Tuesday, August 26, 2014 11:18:21 AM UTC+1, [email protected] wrote: > > For example, when using CTR mode, I can use something like the following > code fragment to randomly seek to a position in a data buffer: > > CryptoPP::CTR_Mode<CryptoPP::AES>::Encryption encryptor; > encryptor.SetKeyWithIV(key, sizeof(key), iv); > encryptor.Seek(startPosition); > encryptor.ProcessData(out, in, length); > > This works very nicely but I would like to use GCM instead. > > Can I therefore do something like the following? > > CryptoPP::GCM<CryptoPP::AES>::Encryption encryptor; > encryptor.SetKeyWithIV(key, sizeof(key), iv); > encryptor.Seek(startPosition); > encryptor.ProcessData(out, in, length); > > As you can probably tell, I'm not a cryptographer. > > Many thanks, > > Ben. > > > -- -- 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. --- You received this message because you are subscribed to the Google Groups "Crypto++ Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
