[Botan-devel] Quick Tutorial Question
seattlesparks at mac.com
Wed Oct 5 13:32:29 EDT 2005
I'm attempting to use Botan to do a simple encryption system that needs
to go into another project. It's a great library; for a change, I have
seventeen ways to do everything, instead of having to puzzle out one.
Of course, this means I get to spend time tinkering to find what the
*best* way to do something is, instead! :)
Basically, I need to be able to generate a public and private keypair,
encrypt a char * buffer into another char * buffer (or
SecureVector<byte>, either way), and decrypt the same way. Basically,
encrypting/decrypting a number of small messages as separate sessions.
At first, I thought just using PK_Encryptor/PK_Decryptor and the
encrypt() or decrypt() functions as in the tutorials was the way to go.
I'm thinking now that pipe might be better since I realized I don't
necessarily have a guarantee that the block I get will be the
appropriate size for an encryption session.
But regardless, in my experimentation I've run into a quirk I wanted to
check on. In one of my test situations, I do indeed have an
X509_PublicKey * as in the tutorials, nicely loaded from a file. But
while attempting to dynamic_cast this X509_PublicKey * to the
appropriate <algo>_PublicKey * works fine, attempting to dynamic_cast
the PublicKey to PK_Encrypting_Key * invariably fails. I've tried this
with a number of algos. Am I missing something obvious? (Or something
non-obvious that just isn't in the tutorial or explicit in the docs?)
Rachel 'Sparks' Blackman -- sysadmin, developer, mad scientist
"If it is not broken, give me five minutes to redesign it!"
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