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-Draft proposal for how crypto will be implemented.
-
-
-Encryption library used: http://nacl.cr.yp.to/
-
-
-When running the program for the first time the crypto_box_keypair() function is used to 
-generate the users public-private key pair. (32 bytes each)
-
-The generated public key is set as the client_id of the peer.
-
-Adding a friend:
-    Alice adds bob to her friends list by adding his 32 byte public key (client_id) to her friends list.
-    2 cases:
-        case 1: Alice adds Bobs public key and bob waits for Alice to attempt to connect to him.
-        case 2: Bob and Alice add their respective public keys to their friends list at the same time.
-    
-    case 1:
-        Alice connects to Bob and sends a data packet (friends request) like so:
-            [char with a value of 01][Alice's Public key (client_id) (32 bytes)][Random nonce (24 bytes)][Encrypted message]
-
-        Where the encrypted message is encrypted with crypto_box() (using Bobs public key, Alice's private key 
-        and the nonce (randomly generated 24 bytes)) and is a message from Alice in which she tells Bob who she is.
-        Ex: hello bob it's me alice -_- add me pl0x.
-        
-        Bob receives the request and decrypts the message using the function crypto_box_open()
-        
-        If the message decrypts successfully: 
-            If Alice is already in Bobs friends list: case 2
-            If Alice is not in Bob's friends list: Bob is prompt to add Alice and is shown the message from her.
-        If Bobs accepts Alice's friends request he adds her public key to his friends list.
-
-    case 2:
-        Bob and Alice both have the others public key in their friends list, they are ready for the next step: Connecting to an already added friend
-        
-
-In the next step.
-only crypto_box() is used for encryption and only crypto_box_open() for decryption (just like in the last step.)
-
-
-Connecting to an already added friend:
-    Alice and Bob are friends.
-    As soon as they connect they each generate a new keypair which will only be used for the current connection (The session keys).
-    They then send themselves the following packet (the crypto handshake) (encrypted part encrypted with the public nonce in the packet
-    the public key of the receiver and private key of the sender)
-        [char with a value of 02][Senders Public key (client_id) (32 bytes)][Random nonce (24 bytes)][Encrypted message containing: [random 24 bytes base nonce][session public key of the peer (32 bytes)]]
-    
-    If the packet is decrypted successfully:
-    Each start using the secret nonce, the public key provided by the other and their own session private key to encrypt data packets (adding to it + 1 for each packet.)
-    Each node sends themselves an empty data packet (data packet with 4 encrypted zero bytes)
-    Data packet:
-        [char with a value of 03][Encrypted data]
-    Each data packet received it is decrypted using the secret nonce sent to the other(with +1 added for the first packet +2 for the second, etc...)
-    along with the private session key of the receiver.
-    Every data packet sent is encrypted using the secret nonce we received (with +1 added for the first packet +2 for the second, etc...),
-    the session public key of the receiver and the session private key of the sender.
-    
-    The encrypted connection is only deemed successful when the empty data packet is received and decrypted successfully.