Storing the IV with the ciphertext Crypto++ CBC AES encryption

Question

I\'m trying to encrypt(and decrypt after) a file using AES in CBC mode and Crypto++ library

Here\'s what I already did:

using namespace CryptoPP;
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Answer 1

The StringSink has the following documentation:

A StringSink serves as a destination for string data in the pipelining paradigm. The data can be binary or ASCII.

So although it is a string, it is internally an octet- or byte string. So yes, you can just save the IV and ciphertext that way.

But to be sure, just compare the length of the result with the IV size (16 bytes) and ciphertext size together. If it is equal then you should be fine.