Adding sample demonstrator usage

Essential

- Fix bug that stops the last context being given r/w access

- Find some way of getting certificate details out of client and server to demonstrate that the details are passed through

Nice to have

- Ideally allow cert files to be supplied at command line or in config

-----BEGIN CERTIFICATE-----

MIIDhTCCAm2gAwIBAgIJALSFyHa6alS0MA0GCSqGSIb3DQEBCwUAMFkxCzAJBgNV

BAYTAkFVMRMwEQYDVQQIDApTb21lLVN0YXRlMSEwHwYDVQQKDBhJbnRlcm5ldCBX

aWRnaXRzIFB0eSBMdGQxEjAQBgNVBAMMCWxvY2FsaG9zdDAeFw0xNDEyMjgyMjEz

MzBaFw0xNTAxMjcyMjEzMzBaMFkxCzAJBgNVBAYTAkFVMRMwEQYDVQQIDApTb21l

LVN0YXRlMSEwHwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxEjAQBgNV

BAMMCWxvY2FsaG9zdDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMFf

P79u/Y0g+pUMxXuzUuF7L3Fo8pIyNigeaFNSIE9L86QOfJZEjuZE2tIdAbYzIAzE

JEOGRremcqA3kLQaT6H6qi9YacChJEVDQDnCf9tDzxFKrLDiFPnFLhGDrdXaxZJV

oSipmyz6iCCJV2FpHVcqofTWcmQJ5RavFJ78DA/B62B+Iy+q5n1DrIquZYMSqWpp

Em50dY+wz0uAHDjkCtudyN3aqIZEqaR/NoMXzbK7aaJoUhD1Mj4aHs/ei+JFx4iU

f3DW4zXJj9XfUa8G1DqcBl+qLqCuGUOnyW+GLutrk9axkUZCIpQNNfRvPQVxtCeF

tuh9ZuwpTJXdUZUnZ8MCAwEAAaNQME4wHQYDVR0OBBYEFLIcln/y41ddl1EBHY9S

J5efVl9BMB8GA1UdIwQYMBaAFLIcln/y41ddl1EBHY9SJ5efVl9BMAwGA1UdEwQF

MAMBAf8wDQYJKoZIhvcNAQELBQADggEBADLIVXyUjIgg41HsuAzZXDQkGVXmhmmH

OeWmGzntfW98Ct73N7NrOa+3R7ZVuwUdwRQZQPb7MtshYlrILN/rpB25iWXAtzfS

1mLPqhbJtlauIFtEmV+/rGfgPrmKcAgAD3Zm0gvv9soSNwSp9jba29S6NNEkTz7S

4/u0rr9vt4J74N6ggtpgmVPnku5RWg9XhIAB2CXAOa7rgDb0+1HDz8LTFCc0bCcH

Dw9smQ5kkvWWFPi2Txk8xb9xXFMuuD8kSfxRhjOraSPx99B174l96xof0Yrcx3r8

aPv3qkfiVPU3gmgTYSerXgNGX1rNVWQs/b1RoSmnl6GdOCSKA3xSAUQ=

-----END CERTIFICATE-----

-----BEGIN RSA PRIVATE KEY-----

MIICWwIBAAKBgQDHH/fTFwKTMHDaFXw6LvyDMhHcXwbN3dfI+RGMbBqrQmb7M0+M

vDsx5pVo/d0k4HzKnVuLe9mRUmxRWKrC6yk6R+ginrbvdPGEsP97bJxZdaxa4HvZ

eVVs7I20gYbY9oHCw9fdMluaPgLKn+QTQz+Bu+xXeXVxnkZikbXRI4l0UQIDAQAB

AoGALVj1amhKGNUmTjQoZ2O98+7aLHKjrQyBkO5P9cfExw3HQBvuWOGhJXsauZ9e

1oAdS1NMvtZEtRitPFVSBjPh3lGPcJcYrWWQ6Sc4wldAMLZEOM3e8IhQKFDMtJz0

bdw4YubZxbIZKY1/9u27HpMZ3ZXGIVziqSZ3mWyPEbDUbKUCQQD6ghyUVd+CMwlM

U6mJmjGlS6TfykgD5eUHdpbif724jrYzpj0yp8SAAegmsfeH8RIpd3jmV41d1lcT

UV5uYTujAkEAy318TB6sh1ApkupmQU2pQWnVt0kewZA/NCDZ6MPsa//cHuhbi7P6

ZxmyZn+u+0KfiVYYeyMjv3BFDfeGn5PPewJAKE6hLJj4oql1mItpnxNpY5BdUgjp

N39ZL688Leuh6j1EQeFAvZLTAknMQdWm33/BjVyE3oM94thnIFuaVyZcAwJAYmly

xqGDEQHcyVehUm3LsH4NxNGRFU28s2o72M2ANo8MFsqLE5pcPKZ52AZiStPishm4

Rz0sWbZjPyj5q41hpwJALbwQYxv9GVVY3hywyzK3t/6ToGmC/jvXYqu5pR+5Khs6

rCD+hZMKQU1AYA4l6n5CMhRYmYk+XdkdjZKUylgcmg==

-----END RSA PRIVATE KEY-----

-----BEGIN CERTIFICATE-----

MIICojCCAYoCAQIwDQYJKoZIhvcNAQELBQAwWTELMAkGA1UEBhMCQVUxEzARBgNV

BAgMClNvbWUtU3RhdGUxITAfBgNVBAoMGEludGVybmV0IFdpZGdpdHMgUHR5IEx0

ZDESMBAGA1UEAwwJbG9jYWxob3N0MB4XDTE0MTIyODIyMTM1N1oXDTE1MDEyNzIy

MTM1N1owWTELMAkGA1UEBhMCQVUxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNV

BAoMGEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDESMBAGA1UEAwwJbG9jYWxob3N0

MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDHH/fTFwKTMHDaFXw6LvyDMhHc

XwbN3dfI+RGMbBqrQmb7M0+MvDsx5pVo/d0k4HzKnVuLe9mRUmxRWKrC6yk6R+gi

nrbvdPGEsP97bJxZdaxa4HvZeVVs7I20gYbY9oHCw9fdMluaPgLKn+QTQz+Bu+xX

eXVxnkZikbXRI4l0UQIDAQABMA0GCSqGSIb3DQEBCwUAA4IBAQBaCxFScRowAmHv

d3DF8BugvtWZFq+GS4/BWgH1pAIj6ED6HrFnxZKrs8t67zUI888An1nmxAFNPPST

6ys1VEW2z4xzZEh2EK/ZPiwkz9rWl9jjilypvIAeG4jnhk5OaaqE0X6J/Lx5rxWk

iQmEslthAz4aysUD9kmivr0Cyzz41ZaJR8oMdRnXx88Qeq4Y3dStIIDjPCRfwaYu

nA4G5P4fj1LY4vcjL5Y/Vw2bkn9gh4t0lx5LuCOh5RRyFYpygW2gyc7qSYI5v5dh

/rsDfRapHgbL5bvfO+qkky2lKfmvy0e0QV0CzStq6CALaa8EbMz8cPiyEfcqmgVg

45HRLZut

-----END CERTIFICATE-----

    PKCS#3 DH Parameters: (1024 bit)

        prime:

            00:8c:26:29:59:c0:96:11:92:73:b7:7a:94:e0:4d:

            f7:44:a1:93:91:20:1e:93:76:7f:05:89:d5:d0:45:

            bd:69:bd:fa:f7:90:4a:12:ad:06:d1:89:80:dd:84:

            e2:5c:5b:74:b0:6a:a0:e6:83:46:b4:27:0d:a4:db:

            74:ac:a4:d5:58:6c:7b:12:43:24:7d:2b:71:92:be:

            84:bf:9a:12:20:04:08:55:b3:bf:d9:1f:bb:26:cd:

            ba:02:d4:9b:28:0f:24:d8:06:10:d0:50:9d:b6:5a:

            97:fa:d8:60:c4:9a:d4:88:97:a5:db:f6:52:a3:66:

            1c:3c:1c:66:13:d1:55:7b:63

        generator: 5 (0x5)

-----BEGIN DH PARAMETERS-----

MIGHAoGBAIwmKVnAlhGSc7d6lOBN90Shk5EgHpN2fwWJ1dBFvWm9+veQShKtBtGJ

gN2E4lxbdLBqoOaDRrQnDaTbdKyk1VhsexJDJH0rcZK+hL+aEiAECFWzv9kfuybN

ugLUmygPJNgGENBQnbZal/rYYMSa1IiXpdv2UqNmHDwcZhPRVXtjAgEF

-----END DH PARAMETERS-----

{

    "contexts" : 

    [

        "Context A"

    ],

    "middleboxes" : 

    [

        {

            "url" : "127.0.0.1:8423",

            "readAccess": [0],

            "writeAccess": [0]

        }

    ],

    "slicedData" : [

        { 

            "slice" : 0,

            "data" : "This is slice 0 data from the client, which the middlebox can see"

        }

    ]

}