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simpleclient.go
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simpleclient.go
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// Copyright (c) 2014, Google, Inc., All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// File: simpleclient.go
package main
import (
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"path"
"github.com/jlmucb/cloudproxy/go/apps/simpleexample/common"
taosupport "github.com/jlmucb/cloudproxy/go/support_libraries/tao_support"
"github.com/jlmucb/cloudproxy/go/tao"
)
var caAddr = flag.String("caAddr", "localhost:8124", "The address to listen on")
var simpleCfg = flag.String("domain_config",
"./tao.config",
"path to tao configuration")
var simpleClientPath = flag.String("path",
"./SimpleClient",
"path to SimpleClient files")
var testRollback = flag.Bool("test_rollback", false, "test rollback?")
var serverHost = flag.String("host", "localhost", "address for client/server")
var serverPort = flag.String("port", "8123", "port for client/server")
var useSimpleDomainService = flag.Bool("use_simpledomainservice", true,
"whether to use simple domain service")
var serverAddr string
func main() {
// This holds the cloudproxy specific data for simpleclient
// including the Program Cert and Program Private key.
var clientProgramData taosupport.TaoProgramData
// Make sure we zero keys when we're done.
defer clientProgramData.ClearTaoProgramData()
// Parse flags
flag.Parse()
serverAddr = *serverHost + ":" + *serverPort
// If TaoParadigm completes without error, clientProgramData contains all the
// Cloudproxy information needed throughout simpleclient execution.
err := taosupport.TaoParadigm(simpleCfg, simpleClientPath,
*useSimpleDomainService, *caAddr, &clientProgramData)
if err != nil {
log.Fatalln("simpleclient: Can't establish Tao: ", err)
}
fmt.Printf("simpleclient: TaoParadigm complete, name: %s\n",
clientProgramData.TaoName)
if *testRollback {
err = tao.Parent().InitCounter("label", 0)
if err != nil {
fmt.Printf("simpleClient: Error return from InitCounter %s\n", err)
} else {
fmt.Printf("simpleClient: InitCounter, no error\n")
}
c, err := tao.Parent().GetCounter("label")
if err != nil {
fmt.Printf("simpleClient: Error Return from GetCounter %d %s\n", c, err)
} else {
fmt.Printf("simpleclient: GetCounter successful %d\n", c)
}
data := []byte{
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5}
sealed, err := tao.Parent().RollbackProtectedSeal("label", data,
tao.SealPolicyDefault) // REMOVE
if err != nil {
fmt.Printf("simpleClient: Error Return from RollbackProtectedSeal %s\n", err)
} else {
fmt.Printf("simpleClient: RollbackProtectedSeal successful %x\n", sealed)
}
c, err = tao.Parent().GetCounter("label")
if err != nil {
fmt.Printf("simpleClient: Error Return from GetCounter %d %s\n", c, err)
} else {
fmt.Printf("simpleclient: GetCounter successful %d\n", c)
}
recoveredData, _, err := tao.Parent().RollbackProtectedUnseal(sealed)
if err != nil {
fmt.Printf("simpleClient: Error Return from RollbackProtectedUnseal %s\n", err)
} else {
fmt.Printf("simpleClient: RollbackProtectedUnseal successful %x\n", recoveredData)
}
fmt.Printf("data: %x, recovered data: %x\n", data, recoveredData)
}
// Open the Tao Channel using the Program key. This program does all the
// standard channel negotiation and presents the secure server name
// after negotiation is complete.
ms, serverName, err := taosupport.OpenTaoChannel(&clientProgramData,
&serverAddr)
if err != nil {
log.Fatalln("simpleclient: Can't establish Tao Channel")
}
log.Printf("simpleclient: establish Tao Channel with %s, %s\n",
serverAddr, serverName)
// Send a simple request and get response.
// We have a simple service protobuf for requests and reponsed between
// simpleclient and simpleserver. There's only on request: tell me the
// secret.
secretRequest := "SecretRequest"
msg := new(simpleexample_messages.SimpleMessage)
msg.RequestType = &secretRequest
simpleexample_messages.SendRequest(ms, msg)
if err != nil {
log.Fatalln("simpleclient: Error in response to SendRequest\n")
}
respmsg, err := simpleexample_messages.GetResponse(ms)
if err != nil {
log.Fatalln("simpleclient: Error in response to GetResponse\n")
}
// This is the secret.
retrieveSecret := respmsg.Data[0]
// Encrypt and store the secret in simpleclient's save area.
out, err := clientProgramData.ProgramCryptingKey.Encrypt(retrieveSecret)
if err != nil {
log.Fatalln("simpleclient: can't encrypt retrieved secret\n")
}
err = ioutil.WriteFile(path.Join(*simpleClientPath,
"retrieved_secret"), out, os.ModePerm)
if err != nil {
log.Fatalln("simpleclient: error saving retrieved secret\n")
}
// Close down.
log.Printf("simpleclient: secret is %s, done\n", retrieveSecret)
}