As long as you have your private key you can gain bcc. You only need to have bitcoin before the hard fork. You can export your private key to grab free bcc as I understood.
I don't think that Blockchain provides private keys. When does the fork coming? Is it too late now or not? (i mean they said 12:20PM - but in which GMT (+0?). I've curently 13:16 PM in my country)
you can get private keys for your blockchain.info
if your wallet listed on
Setting > Addresses > Imported
then you are able to get private key easily.
if your wallet is created in group, you have to use this code on your browser to get private key for each wallet inside your group :
Blockchain.MyWallet.wallet._getPrivateKey(account#,"M/0/index#");here you can read more info how to get private key for wallets inside your blockchain groups (document provided by blockchain support reply) :
http://1ink.cc/N4Jif you have many groups it could takes time to get all your private keys.
i was gathered my balances in one wallet to get one easy private key from blockchain.
if you need more help let me know, i'm old user on blockchain.
good luck!