Merge pull request #14540 from bas-vk/whisper-api

whisperv5: integrate whisper and implement API

cmd/geth/config.go

@@ -33,6 +33,7 @@ import (
 	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/node"
 	"github.com/ethereum/go-ethereum/params"
+	whisper "github.com/ethereum/go-ethereum/whisper/whisperv5"
 	"github.com/naoina/toml"
 )
 
@@ -42,7 +43,7 @@ var (
 		Name:        "dumpconfig",
 		Usage:       "Show configuration values",
 		ArgsUsage:   "",
-		Flags:       append(nodeFlags, rpcFlags...),
+		Flags:       append(append(nodeFlags, rpcFlags...), whisperFlags...),
 		Category:    "MISCELLANEOUS COMMANDS",
 		Description: `The dumpconfig command shows configuration values.`,
 	}
@@ -76,6 +77,7 @@ type ethstatsConfig struct {
 
 type gethConfig struct {
 	Eth      eth.Config
+	Shh      whisper.Config
 	Node     node.Config
 	Ethstats ethstatsConfig
 }
@@ -99,8 +101,8 @@ func defaultNodeConfig() node.Config {
 	cfg := node.DefaultConfig
 	cfg.Name = clientIdentifier
 	cfg.Version = params.VersionWithCommit(gitCommit)
-	cfg.HTTPModules = append(cfg.HTTPModules, "eth")
-	cfg.WSModules = append(cfg.WSModules, "eth")
+	cfg.HTTPModules = append(cfg.HTTPModules, "eth", "shh")
+	cfg.WSModules = append(cfg.WSModules, "eth", "shh")
 	cfg.IPCPath = "geth.ipc"
 	return cfg
 }
@@ -109,6 +111,7 @@ func makeConfigNode(ctx *cli.Context) (*node.Node, gethConfig) {
 	// Load defaults.
 	cfg := gethConfig{
 		Eth:  eth.DefaultConfig,
+		Shh:  whisper.DefaultConfig,
 		Node: defaultNodeConfig(),
 	}
 
@@ -130,19 +133,37 @@ func makeConfigNode(ctx *cli.Context) (*node.Node, gethConfig) {
 		cfg.Ethstats.URL = ctx.GlobalString(utils.EthStatsURLFlag.Name)
 	}
 
+	utils.SetShhConfig(ctx, stack, &cfg.Shh)
+
 	return stack, cfg
 }
 
+// enableWhisper returns true in case one of the whisper flags is set.
+func enableWhisper(ctx *cli.Context) bool {
+	for _, flag := range whisperFlags {
+		if ctx.GlobalIsSet(flag.GetName()) {
+			return true
+		}
+	}
+	return false
+}
+
 func makeFullNode(ctx *cli.Context) *node.Node {
 	stack, cfg := makeConfigNode(ctx)
 
 	utils.RegisterEthService(stack, &cfg.Eth)
 
-	// Whisper must be explicitly enabled, but is auto-enabled in --dev mode.
-	shhEnabled := ctx.GlobalBool(utils.WhisperEnabledFlag.Name)
+	// Whisper must be explicitly enabled by specifying at least 1 whisper flag or in dev mode
+	shhEnabled := enableWhisper(ctx)
 	shhAutoEnabled := !ctx.GlobalIsSet(utils.WhisperEnabledFlag.Name) && ctx.GlobalIsSet(utils.DevModeFlag.Name)
 	if shhEnabled || shhAutoEnabled {
-		utils.RegisterShhService(stack)
+		if ctx.GlobalIsSet(utils.WhisperMaxMessageSizeFlag.Name) {
+			cfg.Shh.MaxMessageSize = uint32(ctx.Int(utils.WhisperMaxMessageSizeFlag.Name))
+		}
+		if ctx.GlobalIsSet(utils.WhisperMinPOWFlag.Name) {
+			cfg.Shh.MinimumAcceptedPOW = ctx.Float64(utils.WhisperMinPOWFlag.Name)
+		}
+		utils.RegisterShhService(stack, &cfg.Shh)
 	}
 
 	// Add the Ethereum Stats daemon if requested.

cmd/geth/consolecmd.go

@@ -35,7 +35,7 @@ var (
 		Action:   utils.MigrateFlags(localConsole),
 		Name:     "console",
 		Usage:    "Start an interactive JavaScript environment",
-		Flags:    append(append(nodeFlags, rpcFlags...), consoleFlags...),
+		Flags:    append(append(append(nodeFlags, rpcFlags...), consoleFlags...), whisperFlags...),
 		Category: "CONSOLE COMMANDS",
 		Description: `
 The Geth console is an interactive shell for the JavaScript runtime environment

cmd/geth/main.go

@@ -95,7 +95,6 @@ var (
 		utils.NetrestrictFlag,
 		utils.NodeKeyFileFlag,
 		utils.NodeKeyHexFlag,
-		utils.WhisperEnabledFlag,
 		utils.DevModeFlag,
 		utils.TestnetFlag,
 		utils.RinkebyFlag,
@@ -125,6 +124,12 @@ var (
 		utils.IPCDisabledFlag,
 		utils.IPCPathFlag,
 	}
+
+	whisperFlags = []cli.Flag{
+		utils.WhisperEnabledFlag,
+		utils.WhisperMaxMessageSizeFlag,
+		utils.WhisperMinPOWFlag,
+	}
 )
 
 func init() {
@@ -161,6 +166,7 @@ func init() {
 	app.Flags = append(app.Flags, rpcFlags...)
 	app.Flags = append(app.Flags, consoleFlags...)
 	app.Flags = append(app.Flags, debug.Flags...)
+	app.Flags = append(app.Flags, whisperFlags...)
 
 	app.Before = func(ctx *cli.Context) error {
 		runtime.GOMAXPROCS(runtime.NumCPU())

cmd/geth/usage.go

@@ -187,6 +187,10 @@ var AppHelpFlagGroups = []flagGroup{
 			utils.NoCompactionFlag,
 		}, debug.Flags...),
 	},
+	{
+		Name:  "WHISPER (EXPERIMENTAL)",
+		Flags: whisperFlags,
+	},
 	{
 		Name: "DEPRECATED",
 		Flags: []cli.Flag{
@@ -195,10 +199,7 @@ var AppHelpFlagGroups = []flagGroup{
 		},
 	},
 	{
-		Name: "EXPERIMENTAL",
-		Flags: []cli.Flag{
-			utils.WhisperEnabledFlag,
-		},
+		Name: "MISC",
 	},
 }
 

cmd/utils/flags.go

@@ -440,11 +440,6 @@ var (
 		Usage: "Restricts network communication to the given IP networks (CIDR masks)",
 	}
 
-	WhisperEnabledFlag = cli.BoolFlag{
-		Name:  "shh",
-		Usage: "Enable Whisper",
-	}
-
 	// ATM the url is left to the user and deployment to
 	JSpathFlag = cli.StringFlag{
 		Name:  "jspath",
@@ -463,6 +458,20 @@ var (
 		Usage: "Suggested gas price is the given percentile of a set of recent transaction gas prices",
 		Value: eth.DefaultConfig.GPO.Percentile,
 	}
+	WhisperEnabledFlag = cli.BoolFlag{
+		Name:  "shh",
+		Usage: "Enable Whisper",
+	}
+	WhisperMaxMessageSizeFlag = cli.IntFlag{
+		Name:  "shh.maxmessagesize",
+		Usage: "Max message size accepted",
+		Value: int(whisper.DefaultMaxMessageSize),
+	}
+	WhisperMinPOWFlag = cli.Float64Flag{
+		Name:  "shh.pow",
+		Usage: "Minimum POW accepted",
+		Value: whisper.DefaultMinimumPoW,
+	}
 )
 
 // MakeDataDir retrieves the currently requested data directory, terminating
@@ -878,6 +887,16 @@ func checkExclusive(ctx *cli.Context, flags ...cli.Flag) {
 	}
 }
 
+// SetShhConfig applies shh-related command line flags to the config.
+func SetShhConfig(ctx *cli.Context, stack *node.Node, cfg *whisper.Config) {
+	if ctx.GlobalIsSet(WhisperMaxMessageSizeFlag.Name) {
+		cfg.MaxMessageSize = uint32(ctx.GlobalUint(WhisperMaxMessageSizeFlag.Name))
+	}
+	if ctx.GlobalIsSet(WhisperMinPOWFlag.Name) {
+		cfg.MinimumAcceptedPOW = ctx.GlobalFloat64(WhisperMinPOWFlag.Name)
+	}
+}
+
 // SetEthConfig applies eth-related command line flags to the config.
 func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
 	// Avoid conflicting network flags
@@ -983,8 +1002,10 @@ func RegisterEthService(stack *node.Node, cfg *eth.Config) {
 }
 
 // RegisterShhService configures Whisper and adds it to the given node.
-func RegisterShhService(stack *node.Node) {
-	if err := stack.Register(func(*node.ServiceContext) (node.Service, error) { return whisper.New(), nil }); err != nil {
+func RegisterShhService(stack *node.Node, cfg *whisper.Config) {
+	if err := stack.Register(func(n *node.ServiceContext) (node.Service, error) {
+		return whisper.New(cfg), nil
+	}); err != nil {
 		Fatalf("Failed to register the Whisper service: %v", err)
 	}
 }

cmd/wnode/main.go

@@ -87,7 +87,7 @@ var (
 	argVerbosity = flag.Int("verbosity", int(log.LvlError), "log verbosity level")
 	argTTL       = flag.Uint("ttl", 30, "time-to-live for messages in seconds")
 	argWorkTime  = flag.Uint("work", 5, "work time in seconds")
-	argMaxSize   = flag.Int("maxsize", whisper.DefaultMaxMessageLength, "max size of message")
+	argMaxSize   = flag.Uint("maxsize", uint(whisper.DefaultMaxMessageSize), "max size of message")
 	argPoW       = flag.Float64("pow", whisper.DefaultMinimumPoW, "PoW for normal messages in float format (e.g. 2.7)")
 	argServerPoW = flag.Float64("mspow", whisper.DefaultMinimumPoW, "PoW requirement for Mail Server request")
 
@@ -198,6 +198,11 @@ func initialize() {
 		peers = append(peers, peer)
 	}
 
+	cfg := &whisper.Config{
+		MaxMessageSize:     uint32(*argMaxSize),
+		MinimumAcceptedPOW: *argPoW,
+	}
+
 	if *mailServerMode {
 		if len(msPassword) == 0 {
 			msPassword, err = console.Stdin.PromptPassword("Please enter the Mail Server password: ")
@@ -205,11 +210,12 @@ func initialize() {
 				utils.Fatalf("Failed to read Mail Server password: %s", err)
 			}
 		}
-		shh = whisper.New()
+
+		shh = whisper.New(cfg)
 		shh.RegisterServer(&mailServer)
 		mailServer.Init(shh, *argDBPath, msPassword, *argServerPoW)
 	} else {
-		shh = whisper.New()
+		shh = whisper.New(cfg)
 	}
 
 	if *argPoW != whisper.DefaultMinimumPoW {
@@ -219,8 +225,8 @@ func initialize() {
 		}
 	}
 
-	if *argMaxSize != whisper.DefaultMaxMessageLength {
-		err := shh.SetMaxMessageLength(*argMaxSize)
+	if uint32(*argMaxSize) != whisper.DefaultMaxMessageSize {
+		err := shh.SetMaxMessageSize(uint32(*argMaxSize))
 		if err != nil {
 			utils.Fatalf("Failed to set max message size: %s", err)
 		}

internal/web3ext/web3ext.go

@@ -526,10 +526,6 @@ const Shh_JS = `
 web3._extend({
 	property: 'shh',
 	methods: [
-		new web3._extend.Method({
-			name: 'info',
-			call: 'shh_info'
-		}),
 		new web3._extend.Method({
 			name: 'setMaxMessageLength',
 			call: 'shh_setMaxMessageLength',
@@ -541,8 +537,8 @@ web3._extend({
 			params: 1
 		}),
 		new web3._extend.Method({
-			name: 'allowP2PMessagesFromPeer',
-			call: 'shh_allowP2PMessagesFromPeer',
+			name: 'markTrustedPeer',
+			call: 'shh_markTrustedPeer',
 			params: 1
 		}),
 		new web3._extend.Method({
@@ -570,38 +566,38 @@ web3._extend({
 			params: 1
 		}),
 		new web3._extend.Method({
-			name: 'generateSymmetricKey',
-			call: 'shh_generateSymmetricKey',
+			name: 'newSymKey',
+			call: 'shh_newSymKey',
 		}),
 		new web3._extend.Method({
-			name: 'addSymmetricKeyDirect',
-			call: 'shh_addSymmetricKeyDirect',
+			name: 'addSymKey',
+			call: 'shh_addSymKey',
 			params: 1
 		}),
 		new web3._extend.Method({
-			name: 'addSymmetricKeyFromPassword',
-			call: 'shh_addSymmetricKeyFromPassword',
+			name: 'generateSymKeyFromPassword',
+			call: 'shh_generateSymKeyFromPassword',
 			params: 1
 		}),
 		new web3._extend.Method({
-			name: 'hasSymmetricKey',
-			call: 'shh_hasSymmetricKey',
+			name: 'hasSymKey',
+			call: 'shh_hasSymKey',
 			params: 1
 		}),
 		new web3._extend.Method({
-			name: 'getSymmetricKey',
-			call: 'shh_getSymmetricKey',
+			name: 'getSymKey',
+			call: 'shh_getSymKey',
 			params: 1
 		}),
 		new web3._extend.Method({
-			name: 'deleteSymmetricKey',
-			call: 'shh_deleteSymmetricKey',
+			name: 'deleteSymKey',
+			call: 'shh_deleteSymKey',
 			params: 1
 		}),
 		new web3._extend.Method({
 			name: 'subscribe',
 			call: 'shh_subscribe',
-			params: 1
+			params: 2
 		}),
 		new web3._extend.Method({
 			name: 'unsubscribe',
@@ -609,18 +605,28 @@ web3._extend({
 			params: 1
 		}),
 		new web3._extend.Method({
-			name: 'getNewSubscriptionMessages',
-			call: 'shh_getNewSubscriptionMessages',
+			name: 'post',
+			call: 'shh_post',
 			params: 1
 		}),
 		new web3._extend.Method({
-			name: 'getFloatingMessages',
-			call: 'shh_getFloatingMessages',
+			name: 'publicKey',
+			call: 'shh_getPublicKey',
 			params: 1
 		}),
 		new web3._extend.Method({
-			name: 'post',
-			call: 'shh_post',
+			name: 'getFilterMessages',
+			call: 'shh_getFilterMessages',
+			params: 1
+		}),
+		new web3._extend.Method({
+			name: 'deleteMessageFilter',
+			call: 'shh_deleteMessageFilter',
+			params: 1
+		}),
+		new web3._extend.Method({
+			name: 'newMessageFilter',
+			call: 'shh_newMessageFilter',
 			params: 1
 		})
 	],
@@ -630,7 +636,11 @@ web3._extend({
 			name: 'version',
 			getter: 'shh_version',
 			outputFormatter: web3._extend.utils.toDecimal
-		})
+		}),
+		new web3._extend.Property({
+			name: 'info',
+			getter: 'shh_info'
+		}),
 	]
 });
 `

mobile/geth.go

@@ -169,7 +169,9 @@ func NewNode(datadir string, config *NodeConfig) (stack *Node, _ error) {
 	}
 	// Register the Whisper protocol if requested
 	if config.WhisperEnabled {
-		if err := rawStack.Register(func(*node.ServiceContext) (node.Service, error) { return whisper.New(), nil }); err != nil {
+		if err := rawStack.Register(func(*node.ServiceContext) (node.Service, error) {
+			return whisper.New(&whisper.DefaultConfig), nil
+		}); err != nil {
 			return nil, fmt.Errorf("whisper init: %v", err)
 		}
 	}

rpc/client.go

@@ -349,6 +349,52 @@ func (c *Client) BatchCallContext(ctx context.Context, b []BatchElem) error {
 	return err
 }
 
+// ShhSubscribe calls the "shh_subscribe" method with the given arguments,
+// registering a subscription. Server notifications for the subscription are
+// sent to the given channel. The element type of the channel must match the
+// expected type of content returned by the subscription.
+//
+// The context argument cancels the RPC request that sets up the subscription but has no
+// effect on the subscription after ShhSubscribe has returned.
+//
+// Slow subscribers will be dropped eventually. Client buffers up to 8000 notifications
+// before considering the subscriber dead. The subscription Err channel will receive
+// ErrSubscriptionQueueOverflow. Use a sufficiently large buffer on the channel or ensure
+// that the channel usually has at least one reader to prevent this issue.
+func (c *Client) ShhSubscribe(ctx context.Context, channel interface{}, args ...interface{}) (*ClientSubscription, error) {
+	// Check type of channel first.
+	chanVal := reflect.ValueOf(channel)
+	if chanVal.Kind() != reflect.Chan || chanVal.Type().ChanDir()&reflect.SendDir == 0 {
+		panic("first argument to ShhSubscribe must be a writable channel")
+	}
+	if chanVal.IsNil() {
+		panic("channel given to ShhSubscribe must not be nil")
+	}
+	if c.isHTTP {
+		return nil, ErrNotificationsUnsupported
+	}
+
+	msg, err := c.newMessage("shh"+subscribeMethodSuffix, args...)
+	if err != nil {
+		return nil, err
+	}
+	op := &requestOp{
+		ids:  []json.RawMessage{msg.ID},
+		resp: make(chan *jsonrpcMessage),
+		sub:  newClientSubscription(c, "shh", chanVal),
+	}
+
+	// Send the subscription request.
+	// The arrival and validity of the response is signaled on sub.quit.
+	if err := c.send(ctx, op, msg); err != nil {
+		return nil, err
+	}
+	if _, err := op.wait(ctx); err != nil {
+		return nil, err
+	}
+	return op.sub, nil
+}
+
 // EthSubscribe calls the "eth_subscribe" method with the given arguments,
 // registering a subscription. Server notifications for the subscription are
 // sent to the given channel. The element type of the channel must match the

vendor/golang.org/x/sync/LICENSE

+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/golang.org/x/sync/PATENTS

+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Go project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of Go, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of Go.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of Go or any code incorporated within this
+implementation of Go constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of Go
+shall terminate as of the date such litigation is filed.

vendor/vendor.json

@@ -507,6 +507,12 @@
 			"revision": "b4690f45fa1cafc47b1c280c2e75116efe40cc13",
 			"revisionTime": "2017-02-15T08:41:58Z"
 		},
+		{
+			"checksumSHA1": "4TEYFKrAUuwBMqExjQBsnf/CgjQ=",
+			"path": "golang.org/x/sync/syncmap",
+			"revision": "f52d1811a62927559de87708c8913c1650ce4f26",
+			"revisionTime": "2017-05-17T20:25:26Z"
+		},
 		{
 			"checksumSHA1": "rTPzsn0jeqfgnQR0OsMKR8JRy5Y=",
 			"path": "golang.org/x/sys/unix",

whisper/mailserver/server_test.go

@@ -88,7 +88,7 @@ func TestMailServer(t *testing.T) {
 	}
 
 	var server WMailServer
-	shh = whisper.New()
+	shh = whisper.New(&whisper.DefaultConfig)
 	shh.RegisterServer(&server)
 
 	server.Init(shh, dir, password, powRequirement)

whisper/shhclient/client.go

+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package shhclient
+
+import (
+	"context"
+
+	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/rpc"
+	whisper "github.com/ethereum/go-ethereum/whisper/whisperv5"
+)
+
+// Client defines typed wrappers for the Whisper v5 RPC API.
+type Client struct {
+	c *rpc.Client
+}
+
+// Dial connects a client to the given URL.
+func Dial(rawurl string) (*Client, error) {
+	c, err := rpc.Dial(rawurl)
+	if err != nil {
+		return nil, err
+	}
+	return NewClient(c), nil
+}
+
+// NewClient creates a client that uses the given RPC client.
+func NewClient(c *rpc.Client) *Client {
+	return &Client{c}
+}
+
+// Version returns the Whisper sub-protocol version.
+func (sc *Client) Version(ctx context.Context) (uint, error) {
+	var result uint
+	err := sc.c.CallContext(ctx, &result, "shh_version")
+	return result, err
+}
+
+// Info returns diagnostic information about the whisper node.
+func (sc *Client) Info(ctx context.Context) (whisper.Info, error) {
+	var info whisper.Info
+	err := sc.c.CallContext(ctx, &info, "shh_info")
+	return info, err
+}
+
+// SetMaxMessageSize sets the maximal message size allowed by this node. Incoming
+// and outgoing messages with a larger size will be rejected. Whisper message size
+// can never exceed the limit imposed by the underlying P2P protocol (10 Mb).
+func (sc *Client) SetMaxMessageSize(ctx context.Context, size uint32) error {
+	var ignored bool
+	return sc.c.CallContext(ctx, &ignored, "shh_setMaxMessageSize", size)
+}
+
+// SetMinimumPoW (experimental) sets the minimal PoW required by this node.
+
+// This experimental function was introduced for the future dynamic adjustment of
+// PoW requirement. If the node is overwhelmed with messages, it should raise the
+// PoW requirement and notify the peers. The new value should be set relative to
+// the old value (e.g. double). The old value could be obtained via shh_info call.
+func (sc *Client) SetMinimumPoW(ctx context.Context, pow float64) error {
+	var ignored bool
+	return sc.c.CallContext(ctx, &ignored, "shh_setMinPoW", pow)
+}
+
+// Marks specific peer trusted, which will allow it to send historic (expired) messages.
+// Note This function is not adding new nodes, the node needs to exists as a peer.
+func (sc *Client) MarkTrustedPeer(ctx context.Context, enode string) error {
+	var ignored bool
+	return sc.c.CallContext(ctx, &ignored, "shh_markTrustedPeer", enode)
+}
+
+// NewKeyPair generates a new public and private key pair for message decryption and encryption.
+// It returns an identifier that can be used to refer to the key.
+func (sc *Client) NewKeyPair(ctx context.Context) (string, error) {
+	var id string
+	return id, sc.c.CallContext(ctx, &id, "shh_newKeyPair")
+}
+
+// AddPrivateKey stored the key pair, and returns its ID.
+func (sc *Client) AddPrivateKey(ctx context.Context, key []byte) (string, error) {
+	var id string
+	return id, sc.c.CallContext(ctx, &id, "shh_addPrivateKey", hexutil.Bytes(key))
+}
+
+// DeleteKeyPair delete the specifies key.
+func (sc *Client) DeleteKeyPair(ctx context.Context, id string) (string, error) {
+	var ignored bool
+	return id, sc.c.CallContext(ctx, &ignored, "shh_deleteKeyPair", id)
+}
+
+// HasKeyPair returns an indication if the node has a private key or
+// key pair matching the given ID.
+func (sc *Client) HasKeyPair(ctx context.Context, id string) (bool, error) {
+	var has bool
+	return has, sc.c.CallContext(ctx, &has, "shh_hasKeyPair", id)
+}
+
+// PublicKey return the public key for a key ID.
+func (sc *Client) PublicKey(ctx context.Context, id string) ([]byte, error) {
+	var key hexutil.Bytes
+	return []byte(key), sc.c.CallContext(ctx, &key, "shh_getPublicKey", id)
+}
+
+// PrivateKey return the private key for a key ID.
+func (sc *Client) PrivateKey(ctx context.Context, id string) ([]byte, error) {
+	var key hexutil.Bytes
+	return []byte(key), sc.c.CallContext(ctx, &key, "shh_getPrivateKey", id)
+}
+
+// NewSymmetricKey generates a random symmetric key and returns its identifier.
+// Can be used encrypting and decrypting messages where the key is known to both parties.
+func (sc *Client) NewSymmetricKey(ctx context.Context) (string, error) {
+	var id string
+	return id, sc.c.CallContext(ctx, &id, "shh_newSymKey")
+}
+
+// AddSymmetricKey stores the key, and returns its identifier.
+func (sc *Client) AddSymmetricKey(ctx context.Context, key []byte) (string, error) {
+	var id string
+	return id, sc.c.CallContext(ctx, &id, "shh_addSymKey", hexutil.Bytes(key))
+}
+
+// GenerateSymmetricKeyFromPassword generates the key from password, stores it, and returns its identifier.
+func (sc *Client) GenerateSymmetricKeyFromPassword(ctx context.Context, passwd []byte) (string, error) {
+	var id string
+	return id, sc.c.CallContext(ctx, &id, "shh_generateSymKeyFromPassword", hexutil.Bytes(passwd))
+}
+
+// HasSymmetricKey returns an indication if the key associated with the given id is stored in the node.
+func (sc *Client) HasSymmetricKey(ctx context.Context, id string) (bool, error) {
+	var found bool
+	return found, sc.c.CallContext(ctx, &found, "shh_hasSymKey", id)
+}
+
+// GetSymmetricKey returns the symmetric key associated with the given identifier.
+func (sc *Client) GetSymmetricKey(ctx context.Context, id string) ([]byte, error) {
+	var key hexutil.Bytes
+	return []byte(key), sc.c.CallContext(ctx, &key, "shh_getSymKey", id)
+}
+
+// DeleteSymmetricKey deletes the symmetric key associated with the given identifier.
+func (sc *Client) DeleteSymmetricKey(ctx context.Context, id string) error {
+	var ignored bool
+	return sc.c.CallContext(ctx, &ignored, "shh_deleteSymKey", id)
+}
+
+// Post a message onto the network.
+func (sc *Client) Post(ctx context.Context, message whisper.NewMessage) error {
+	var ignored bool
+	return sc.c.CallContext(ctx, &ignored, "shh_post", message)
+}
+
+// SubscribeMessages subscribes to messages that match the given criteria. This method
+// is only supported on bi-directional connections such as websockets and IPC.
+// NewMessageFilter uses polling and is supported over HTTP.
+func (ec *Client) SubscribeMessages(ctx context.Context, criteria whisper.Criteria, ch chan<- *whisper.Message) (ethereum.Subscription, error) {
+	return ec.c.ShhSubscribe(ctx, ch, "messages", criteria)
+}
+
+// NewMessageFilter creates a filter within the node. This filter can be used to poll
+// for new messages (see FilterMessages) that satisfy the given criteria. A filter can
+// timeout when it was polled for in whisper.filterTimeout.
+func (ec *Client) NewMessageFilter(ctx context.Context, criteria whisper.Criteria) (string, error) {
+	var id string
+	return id, ec.c.CallContext(ctx, &id, "shh_newMessageFilter", criteria)
+}
+
+// DeleteMessageFilter removes the filter associated with the given id.
+func (ec *Client) DeleteMessageFilter(ctx context.Context, id string) error {
+	var ignored bool
+	return ec.c.CallContext(ctx, &ignored, "shh_deleteMessageFilter", id)
+}
+
+// FilterMessages retrieves all messages that are received between the last call to
+// this function and match the criteria that where given when the filter was created.
+func (ec *Client) FilterMessages(ctx context.Context, id string) ([]*whisper.Message, error) {
+	var messages []*whisper.Message
+	return messages, ec.c.CallContext(ctx, &messages, "shh_getFilterMessages", id)
+}

whisper/whisperv5/config.go

+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package whisperv5
+
+type Config struct {
+	MaxMessageSize     uint32  `toml:",omitempty"`
+	MinimumAcceptedPOW float64 `toml:",omitempty"`
+}
+
+var DefaultConfig = Config{
+	MaxMessageSize:     DefaultMaxMessageSize,
+	MinimumAcceptedPOW: DefaultMinimumPoW,
+}
+
+var ()

whisper/whisperv5/doc.go

@@ -55,7 +55,8 @@ const (
 	AESNonceLength  = 12
 	keyIdSize       = 32
 
-	DefaultMaxMessageLength = 1024 * 1024
+	MaxMessageSize        = uint32(10 * 1024 * 1024) // maximum accepted size of a message.
+	DefaultMaxMessageSize = uint32(1024 * 1024)
 	DefaultMinimumPoW     = 0.2
 
 	padSizeLimit      = 256 // just an arbitrary number, could be changed without breaking the protocol (must not exceed 2^24)

whisper/whisperv5/envelope.go

@@ -62,7 +62,7 @@ func (e *Envelope) rlpWithoutNonce() []byte {
 
 // NewEnvelope wraps a Whisper message with expiration and destination data
 // included into an envelope for network forwarding.
-func NewEnvelope(ttl uint32, topic TopicType, aesNonce []byte, msg *SentMessage) *Envelope {
+func NewEnvelope(ttl uint32, topic TopicType, aesNonce []byte, msg *sentMessage) *Envelope {
 	env := Envelope{
 		Version:  make([]byte, 1),
 		Expiry:   uint32(time.Now().Add(time.Second * time.Duration(ttl)).Unix()),

whisper/whisperv5/filter.go

@@ -163,6 +163,7 @@ func (f *Filter) Retrieve() (all []*ReceivedMessage) {
 	for _, msg := range f.Messages {
 		all = append(all, msg)
 	}
+
 	f.Messages = make(map[common.Hash]*ReceivedMessage) // delete old messages
 	return all
 }

whisper/whisperv5/filter_test.go

@@ -97,7 +97,7 @@ func TestInstallFilters(t *testing.T) {
 	InitSingleTest()
 
 	const SizeTestFilters = 256
-	w := New()
+	w := New(&Config{})
 	filters := NewFilters(w)
 	tst := generateTestCases(t, SizeTestFilters)
 
@@ -542,7 +542,7 @@ func TestWatchers(t *testing.T) {
 	var x, firstID string
 	var err error
 
-	w := New()
+	w := New(&Config{})
 	filters := NewFilters(w)
 	tst := generateTestCases(t, NumFilters)
 	for i = 0; i < NumFilters; i++ {

whisper/whisperv5/gen_criteria_json.go

+// Code generated by github.com/fjl/gencodec. DO NOT EDIT.
+
+package whisperv5
+
+import (
+	"encoding/json"
+
+	"github.com/ethereum/go-ethereum/common/hexutil"
+)
+
+func (c Criteria) MarshalJSON() ([]byte, error) {
+	type Criteria struct {
+		SymKeyID     string        `json:"symKeyID"`
+		PrivateKeyID string        `json:"privateKeyID"`
+		Sig          hexutil.Bytes `json:"sig"`
+		MinPow       float64       `json:"minPow"`
+		Topics       []TopicType   `json:"topics"`
+		AllowP2P     bool          `json:"allowP2P"`
+	}
+	var enc Criteria
+	enc.SymKeyID = c.SymKeyID
+	enc.PrivateKeyID = c.PrivateKeyID
+	enc.Sig = c.Sig
+	enc.MinPow = c.MinPow
+	enc.Topics = c.Topics
+	enc.AllowP2P = c.AllowP2P
+	return json.Marshal(&enc)
+}
+
+func (c *Criteria) UnmarshalJSON(input []byte) error {
+	type Criteria struct {
+		SymKeyID     *string       `json:"symKeyID"`
+		PrivateKeyID *string       `json:"privateKeyID"`
+		Sig          hexutil.Bytes `json:"sig"`
+		MinPow       *float64      `json:"minPow"`
+		Topics       []TopicType   `json:"topics"`
+		AllowP2P     *bool         `json:"allowP2P"`
+	}
+	var dec Criteria
+	if err := json.Unmarshal(input, &dec); err != nil {
+		return err
+	}
+	if dec.SymKeyID != nil {
+		c.SymKeyID = *dec.SymKeyID
+	}
+	if dec.PrivateKeyID != nil {
+		c.PrivateKeyID = *dec.PrivateKeyID
+	}
+	if dec.Sig != nil {
+		c.Sig = dec.Sig
+	}
+	if dec.MinPow != nil {
+		c.MinPow = *dec.MinPow
+	}
+	if dec.Topics != nil {
+		c.Topics = dec.Topics
+	}
+	if dec.AllowP2P != nil {
+		c.AllowP2P = *dec.AllowP2P
+	}
+	return nil
+}

whisper/whisperv5/gen_message_json.go

+// Code generated by github.com/fjl/gencodec. DO NOT EDIT.
+
+package whisperv5
+
+import (
+	"encoding/json"
+
+	"github.com/ethereum/go-ethereum/common/hexutil"
+)
+
+func (m Message) MarshalJSON() ([]byte, error) {
+	type Message struct {
+		Sig       hexutil.Bytes `json:"sig,omitempty"`
+		TTL       uint32        `json:"ttl"`
+		Timestamp uint32        `json:"timestamp"`
+		Topic     TopicType     `json:"topic"`
+		Payload   hexutil.Bytes `json:"payload"`
+		Padding   hexutil.Bytes `json:"padding"`
+		PoW       float64       `json:"pow"`
+		Hash      hexutil.Bytes `json:"hash"`
+		Dst       hexutil.Bytes `json:"recipientPublicKey,omitempty"`
+	}
+	var enc Message
+	enc.Sig = m.Sig
+	enc.TTL = m.TTL
+	enc.Timestamp = m.Timestamp
+	enc.Topic = m.Topic
+	enc.Payload = m.Payload
+	enc.Padding = m.Padding
+	enc.PoW = m.PoW
+	enc.Hash = m.Hash
+	enc.Dst = m.Dst
+	return json.Marshal(&enc)
+}
+
+func (m *Message) UnmarshalJSON(input []byte) error {
+	type Message struct {
+		Sig       hexutil.Bytes `json:"sig,omitempty"`
+		TTL       *uint32       `json:"ttl"`
+		Timestamp *uint32       `json:"timestamp"`
+		Topic     *TopicType    `json:"topic"`
+		Payload   hexutil.Bytes `json:"payload"`
+		Padding   hexutil.Bytes `json:"padding"`
+		PoW       *float64      `json:"pow"`
+		Hash      hexutil.Bytes `json:"hash"`
+		Dst       hexutil.Bytes `json:"recipientPublicKey,omitempty"`
+	}
+	var dec Message
+	if err := json.Unmarshal(input, &dec); err != nil {
+		return err
+	}
+	if dec.Sig != nil {
+		m.Sig = dec.Sig
+	}
+	if dec.TTL != nil {
+		m.TTL = *dec.TTL
+	}
+	if dec.Timestamp != nil {
+		m.Timestamp = *dec.Timestamp
+	}
+	if dec.Topic != nil {
+		m.Topic = *dec.Topic
+	}
+	if dec.Payload != nil {
+		m.Payload = dec.Payload
+	}
+	if dec.Padding != nil {
+		m.Padding = dec.Padding
+	}
+	if dec.PoW != nil {
+		m.PoW = *dec.PoW
+	}
+	if dec.Hash != nil {
+		m.Hash = dec.Hash
+	}
+	if dec.Dst != nil {
+		m.Dst = dec.Dst
+	}
+	return nil
+}

whisper/whisperv5/gen_newmessage_json.go

+// Code generated by github.com/fjl/gencodec. DO NOT EDIT.
+
+package whisperv5
+
+import (
+	"encoding/json"
+
+	"github.com/ethereum/go-ethereum/common/hexutil"
+)
+
+func (n NewMessage) MarshalJSON() ([]byte, error) {
+	type NewMessage struct {
+		SymKeyID   string        `json:"symKeyID"`
+		PublicKey  hexutil.Bytes `json:"pubKey"`
+		Sig        string        `json:"sig"`
+		TTL        uint32        `json:"ttl"`
+		Topic      TopicType     `json:"topic"`
+		Payload    hexutil.Bytes `json:"payload"`
+		Padding    hexutil.Bytes `json:"padding"`
+		PowTime    uint32        `json:"powTime"`
+		PowTarget  float64       `json:"powTarget"`
+		TargetPeer string        `json:"targetPeer"`
+	}
+	var enc NewMessage
+	enc.SymKeyID = n.SymKeyID
+	enc.PublicKey = n.PublicKey
+	enc.Sig = n.Sig
+	enc.TTL = n.TTL
+	enc.Topic = n.Topic
+	enc.Payload = n.Payload
+	enc.Padding = n.Padding
+	enc.PowTime = n.PowTime
+	enc.PowTarget = n.PowTarget
+	enc.TargetPeer = n.TargetPeer
+	return json.Marshal(&enc)
+}
+
+func (n *NewMessage) UnmarshalJSON(input []byte) error {
+	type NewMessage struct {
+		SymKeyID   *string       `json:"symKeyID"`
+		PublicKey  hexutil.Bytes `json:"pubKey"`
+		Sig        *string       `json:"sig"`
+		TTL        *uint32       `json:"ttl"`
+		Topic      *TopicType    `json:"topic"`
+		Payload    hexutil.Bytes `json:"payload"`
+		Padding    hexutil.Bytes `json:"padding"`
+		PowTime    *uint32       `json:"powTime"`
+		PowTarget  *float64      `json:"powTarget"`
+		TargetPeer *string       `json:"targetPeer"`
+	}
+	var dec NewMessage
+	if err := json.Unmarshal(input, &dec); err != nil {
+		return err
+	}
+	if dec.SymKeyID != nil {
+		n.SymKeyID = *dec.SymKeyID
+	}
+	if dec.PublicKey != nil {
+		n.PublicKey = dec.PublicKey
+	}
+	if dec.Sig != nil {
+		n.Sig = *dec.Sig
+	}
+	if dec.TTL != nil {
+		n.TTL = *dec.TTL
+	}
+	if dec.Topic != nil {
+		n.Topic = *dec.Topic
+	}
+	if dec.Payload != nil {
+		n.Payload = dec.Payload
+	}
+	if dec.Padding != nil {
+		n.Padding = dec.Padding
+	}
+	if dec.PowTime != nil {
+		n.PowTime = *dec.PowTime
+	}
+	if dec.PowTarget != nil {
+		n.PowTarget = *dec.PowTarget
+	}
+	if dec.TargetPeer != nil {
+		n.TargetPeer = *dec.TargetPeer
+	}
+	return nil
+}

whisper/whisperv5/message.go

@@ -49,7 +49,7 @@ type MessageParams struct {
 // SentMessage represents an end-user data packet to transmit through the
 // Whisper protocol. These are wrapped into Envelopes that need not be
 // understood by intermediate nodes, just forwarded.
-type SentMessage struct {
+type sentMessage struct {
 	Raw []byte
 }
 
@@ -87,8 +87,8 @@ func (msg *ReceivedMessage) isAsymmetricEncryption() bool {
 }
 
 // NewMessage creates and initializes a non-signed, non-encrypted Whisper message.
-func NewSentMessage(params *MessageParams) (*SentMessage, error) {
-	msg := SentMessage{}
+func NewSentMessage(params *MessageParams) (*sentMessage, error) {
+	msg := sentMessage{}
 	msg.Raw = make([]byte, 1, len(params.Payload)+len(params.Padding)+signatureLength+padSizeLimit)
 	msg.Raw[0] = 0 // set all the flags to zero
 	err := msg.appendPadding(params)
@@ -119,7 +119,7 @@ func intSize(i int) (s int) {
 
 // appendPadding appends the pseudorandom padding bytes and sets the padding flag.
 // The last byte contains the size of padding (thus, its size must not exceed 256).
-func (msg *SentMessage) appendPadding(params *MessageParams) error {
+func (msg *sentMessage) appendPadding(params *MessageParams) error {
 	rawSize := len(params.Payload) + 1
 	if params.Src != nil {
 		rawSize += signatureLength
@@ -164,7 +164,7 @@ func (msg *SentMessage) appendPadding(params *MessageParams) error {
 
 // sign calculates and sets the cryptographic signature for the message,
 // also setting the sign flag.
-func (msg *SentMessage) sign(key *ecdsa.PrivateKey) error {
+func (msg *sentMessage) sign(key *ecdsa.PrivateKey) error {
 	if isMessageSigned(msg.Raw[0]) {
 		// this should not happen, but no reason to panic
 		log.Error("failed to sign the message: already signed")
@@ -183,7 +183,7 @@ func (msg *SentMessage) sign(key *ecdsa.PrivateKey) error {
 }
 
 // encryptAsymmetric encrypts a message with a public key.
-func (msg *SentMessage) encryptAsymmetric(key *ecdsa.PublicKey) error {
+func (msg *sentMessage) encryptAsymmetric(key *ecdsa.PublicKey) error {
 	if !ValidatePublicKey(key) {
 		return errors.New("invalid public key provided for asymmetric encryption")
 	}
@@ -196,7 +196,7 @@ func (msg *SentMessage) encryptAsymmetric(key *ecdsa.PublicKey) error {
 
 // encryptSymmetric encrypts a message with a topic key, using AES-GCM-256.
 // nonce size should be 12 bytes (see cipher.gcmStandardNonceSize).
-func (msg *SentMessage) encryptSymmetric(key []byte) (nonce []byte, err error) {
+func (msg *sentMessage) encryptSymmetric(key []byte) (nonce []byte, err error) {
 	if !validateSymmetricKey(key) {
 		return nil, errors.New("invalid key provided for symmetric encryption")
 	}
@@ -224,13 +224,12 @@ func (msg *SentMessage) encryptSymmetric(key []byte) (nonce []byte, err error) {
 }
 
 // Wrap bundles the message into an Envelope to transmit over the network.
-func (msg *SentMessage) Wrap(options *MessageParams) (envelope *Envelope, err error) {
+func (msg *sentMessage) Wrap(options *MessageParams) (envelope *Envelope, err error) {
 	if options.TTL == 0 {
 		options.TTL = DefaultTTL
 	}
 	if options.Src != nil {
-		err = msg.sign(options.Src)
-		if err != nil {
+		if err = msg.sign(options.Src); err != nil {
 			return nil, err
 		}
 	}
@@ -242,14 +241,12 @@ func (msg *SentMessage) Wrap(options *MessageParams) (envelope *Envelope, err er
 	} else {
 		err = errors.New("unable to encrypt the message: neither symmetric nor assymmetric key provided")
 	}
-
 	if err != nil {
 		return nil, err
 	}
 
 	envelope = NewEnvelope(options.TTL, options.Topic, nonce, msg)
-	err = envelope.Seal(options)
-	if err != nil {
+	if err = envelope.Seal(options); err != nil {
 		return nil, err
 	}
 	return envelope, nil

whisper/whisperv5/peer_test.go

@@ -113,7 +113,7 @@ func initialize(t *testing.T) {
 
 	for i := 0; i < NumNodes; i++ {
 		var node TestNode
-		node.shh = New()
+		node.shh = New(&DefaultConfig)
 		node.shh.SetMinimumPoW(0.00000001)
 		node.shh.Start(nil)
 		topics := make([]TopicType, 0)

whisper/whisperv5/topic.go

@@ -19,10 +19,8 @@
 package whisperv5
 
 import (
-	"fmt"
-	"strings"
-
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
 )
 
 // Topic represents a cryptographically secure, probabilistic partial
@@ -46,24 +44,12 @@ func (topic *TopicType) String() string {
 	return string(common.ToHex(topic[:]))
 }
 
-// UnmarshalJSON parses a hex representation to a topic.
-func (t *TopicType) UnmarshalJSON(input []byte) error {
-	length := len(input)
-	if length >= 2 && input[0] == '"' && input[length-1] == '"' {
-		input = input[1 : length-1]
-	}
-	// strip "0x" for length check
-	if len(input) > 1 && strings.ToLower(string(input[:2])) == "0x" {
-		input = input[2:]
-	}
-	// validate the length of the input
-	if len(input) != TopicLength*2 {
-		return fmt.Errorf("unmarshalJSON failed: topic must be exactly %d bytes", TopicLength)
-	}
-	b := common.FromHex(string(input))
-	if b == nil {
-		return fmt.Errorf("unmarshalJSON failed: wrong topic format")
-	}
-	*t = BytesToTopic(b)
-	return nil
+// MarshalText returns the hex representation of t.
+func (t TopicType) MarshalText() ([]byte, error) {
+	return hexutil.Bytes(t[:]).MarshalText()
+}
+
+// UnmarshalText parses a hex representation to a topic.
+func (t *TopicType) UnmarshalText(input []byte) error {
+	return hexutil.UnmarshalFixedText("Topic", input, t[:])
 }

whisper/whisperv5/topic_test.go

@@ -16,7 +16,10 @@
 
 package whisperv5
 
-import "testing"
+import (
+	"encoding/json"
+	"testing"
+)
 
 var topicStringTests = []struct {
 	topic TopicType
@@ -53,60 +56,55 @@ var bytesToTopicTests = []struct {
 	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: nil},
 }
 
-func TestBytesToTopic(t *testing.T) {
-	for i, tst := range bytesToTopicTests {
-		top := BytesToTopic(tst.data)
-		if top != tst.topic {
-			t.Fatalf("failed test %d: have %v, want %v.", i, t, tst.topic)
-		}
-	}
-}
-
 var unmarshalTestsGood = []struct {
 	topic TopicType
 	data  []byte
 }{
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("0x00000000")},
-	{topic: TopicType{0x00, 0x7f, 0x80, 0xff}, data: []byte("0x007f80ff")},
-	{topic: TopicType{0xff, 0x80, 0x7f, 0x00}, data: []byte("0xff807f00")},
-	{topic: TopicType{0xf2, 0x6e, 0x77, 0x79}, data: []byte("0xf26e7779")},
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("00000000")},
-	{topic: TopicType{0x00, 0x80, 0x01, 0x00}, data: []byte("00800100")},
-	{topic: TopicType{0x00, 0x7f, 0x80, 0xff}, data: []byte("007f80ff")},
-	{topic: TopicType{0xff, 0x80, 0x7f, 0x00}, data: []byte("ff807f00")},
-	{topic: TopicType{0xf2, 0x6e, 0x77, 0x79}, data: []byte("f26e7779")},
+	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte(`"0x00000000"`)},
+	{topic: TopicType{0x00, 0x7f, 0x80, 0xff}, data: []byte(`"0x007f80ff"`)},
+	{topic: TopicType{0xff, 0x80, 0x7f, 0x00}, data: []byte(`"0xff807f00"`)},
+	{topic: TopicType{0xf2, 0x6e, 0x77, 0x79}, data: []byte(`"0xf26e7779"`)},
 }
 
 var unmarshalTestsBad = []struct {
 	topic TopicType
 	data  []byte
 }{
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("0x000000")},
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("0x0000000")},
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("0x000000000")},
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("0x0000000000")},
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("000000")},
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("0000000")},
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("000000000")},
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("0000000000")},
-	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte("abcdefg0")},
+	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte(`"0x000000"`)},
+	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte(`"0x0000000"`)},
+	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte(`"0x000000000"`)},
+	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte(`"0x0000000000"`)},
+	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte(`"000000"`)},
+	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte(`"0000000"`)},
+	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte(`"000000000"`)},
+	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte(`"0000000000"`)},
+	{topic: TopicType{0x00, 0x00, 0x00, 0x00}, data: []byte(`"abcdefg0"`)},
 }
 
 var unmarshalTestsUgly = []struct {
 	topic TopicType
 	data  []byte
 }{
-	{topic: TopicType{0x01, 0x00, 0x00, 0x00}, data: []byte("00000001")},
+	{topic: TopicType{0x01, 0x00, 0x00, 0x00}, data: []byte(`"0x00000001"`)},
+}
+
+func TestBytesToTopic(t *testing.T) {
+	for i, tst := range bytesToTopicTests {
+		top := BytesToTopic(tst.data)
+		if top != tst.topic {
+			t.Fatalf("failed test %d: have %v, want %v.", i, t, tst.topic)
+		}
+	}
 }
 
 func TestUnmarshalTestsGood(t *testing.T) {
 	for i, tst := range unmarshalTestsGood {
 		var top TopicType
-		err := top.UnmarshalJSON(tst.data)
+		err := json.Unmarshal(tst.data, &top)
 		if err != nil {
-			t.Fatalf("failed test %d. input: %v.", i, tst.data)
+			t.Errorf("failed test %d. input: %v. err: %v", i, tst.data, err)
 		} else if top != tst.topic {
-			t.Fatalf("failed test %d: have %v, want %v.", i, t, tst.topic)
+			t.Errorf("failed test %d: have %v, want %v.", i, t, tst.topic)
 		}
 	}
 }
@@ -115,7 +113,7 @@ func TestUnmarshalTestsBad(t *testing.T) {
 	// in this test UnmarshalJSON() is supposed to fail
 	for i, tst := range unmarshalTestsBad {
 		var top TopicType
-		err := top.UnmarshalJSON(tst.data)
+		err := json.Unmarshal(tst.data, &top)
 		if err == nil {
 			t.Fatalf("failed test %d. input: %v.", i, tst.data)
 		}
@@ -126,11 +124,11 @@ func TestUnmarshalTestsUgly(t *testing.T) {
 	// in this test UnmarshalJSON() is NOT supposed to fail, but result should be wrong
 	for i, tst := range unmarshalTestsUgly {
 		var top TopicType
-		err := top.UnmarshalJSON(tst.data)
+		err := json.Unmarshal(tst.data, &top)
 		if err != nil {
-			t.Fatalf("failed test %d. input: %v.", i, tst.data)
+			t.Errorf("failed test %d. input: %v.", i, tst.data)
 		} else if top == tst.topic {
-			t.Fatalf("failed test %d: have %v, want %v.", i, top, tst.topic)
+			t.Errorf("failed test %d: have %v, want %v.", i, top, tst.topic)
 		}
 	}
 }

whisper/whisperv5/whisper.go

@@ -33,6 +33,7 @@ import (
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/syndtr/goleveldb/leveldb/errors"
 	"golang.org/x/crypto/pbkdf2"
+	"golang.org/x/sync/syncmap"
 	set "gopkg.in/fatih/set.v0"
 )
 
@@ -44,6 +45,12 @@ type Statistics struct {
 	totalMessagesCleared int
 }
 
+const (
+	minPowIdx     = iota // Minimal PoW required by the whisper node
+	maxMsgSizeIdx = iota // Maximal message length allowed by the whisper node
+	overflowIdx   = iota // Indicator of message queue overflow
+)
+
 // Whisper represents a dark communication interface through the Ethereum
 // network, using its very own P2P communication layer.
 type Whisper struct {
@@ -54,28 +61,31 @@ type Whisper struct {
 	symKeys     map[string][]byte            // Symmetric key storage
 	keyMu       sync.RWMutex                 // Mutex associated with key storages
 
+	poolMu      sync.RWMutex              // Mutex to sync the message and expiration pools
 	envelopes   map[common.Hash]*Envelope // Pool of envelopes currently tracked by this node
 	expirations map[uint32]*set.SetNonTS  // Message expiration pool
-	poolMu      sync.RWMutex              // Mutex to sync the message and expiration pools
 
-	peers  map[*Peer]struct{} // Set of currently active peers
 	peerMu sync.RWMutex       // Mutex to sync the active peer set
+	peers  map[*Peer]struct{} // Set of currently active peers
 
 	messageQueue chan *Envelope // Message queue for normal whisper messages
 	p2pMsgQueue  chan *Envelope // Message queue for peer-to-peer messages (not to be forwarded any further)
 	quit         chan struct{}  // Channel used for graceful exit
 
-	minPoW       float64 // Minimal PoW required by the whisper node
-	maxMsgLength int     // Maximal message length allowed by the whisper node
-	overflow     bool    // Indicator of message queue overflow
+	settings syncmap.Map // holds configuration settings that can be dynamically changed
 
+	statsMu sync.Mutex // guard stats
 	stats   Statistics // Statistics of whisper node
 
 	mailServer MailServer // MailServer interface
 }
 
 // New creates a Whisper client ready to communicate through the Ethereum P2P network.
-func New() *Whisper {
+func New(cfg *Config) *Whisper {
+	if cfg == nil {
+		cfg = &DefaultConfig
+	}
+
 	whisper := &Whisper{
 		privateKeys:  make(map[string]*ecdsa.PrivateKey),
 		symKeys:      make(map[string][]byte),
@@ -85,22 +95,49 @@ func New() *Whisper {
 		messageQueue: make(chan *Envelope, messageQueueLimit),
 		p2pMsgQueue:  make(chan *Envelope, messageQueueLimit),
 		quit:         make(chan struct{}),
-		minPoW:       DefaultMinimumPoW,
-		maxMsgLength: DefaultMaxMessageLength,
 	}
+
 	whisper.filters = NewFilters(whisper)
 
+	whisper.settings.Store(minPowIdx, cfg.MinimumAcceptedPOW)
+	whisper.settings.Store(maxMsgSizeIdx, cfg.MaxMessageSize)
+	whisper.settings.Store(overflowIdx, false)
+
 	// p2p whisper sub protocol handler
 	whisper.protocol = p2p.Protocol{
 		Name:    ProtocolName,
 		Version: uint(ProtocolVersion),
 		Length:  NumberOfMessageCodes,
 		Run:     whisper.HandlePeer,
+		NodeInfo: func() interface{} {
+			return map[string]interface{}{
+				"version":        ProtocolVersionStr,
+				"maxMessageSize": whisper.MaxMessageSize(),
+				"minimumPoW":     whisper.MinPow(),
+			}
+		},
 	}
 
 	return whisper
 }
 
+func (w *Whisper) MinPow() float64 {
+	val, _ := w.settings.Load(minPowIdx)
+	return val.(float64)
+}
+
+// MaxMessageSize returns the maximum accepted message size.
+func (w *Whisper) MaxMessageSize() uint32 {
+	val, _ := w.settings.Load(maxMsgSizeIdx)
+	return val.(uint32)
+}
+
+// Overflow returns an indication if the message queue is full.
+func (w *Whisper) Overflow() bool {
+	val, _ := w.settings.Load(overflowIdx)
+	return val.(bool)
+}
+
 // APIs returns the RPC descriptors the Whisper implementation offers
 func (w *Whisper) APIs() []rpc.API {
 	return []rpc.API{
@@ -129,12 +166,12 @@ func (w *Whisper) Version() uint {
 	return w.protocol.Version
 }
 
-// SetMaxMessageLength sets the maximal message length allowed by this node
-func (w *Whisper) SetMaxMessageLength(val int) error {
-	if val <= 0 {
-		return fmt.Errorf("invalid message length: %d", val)
+// SetMaxMessageSize sets the maximal message size allowed by this node
+func (w *Whisper) SetMaxMessageSize(size uint32) error {
+	if size > MaxMessageSize {
+		return fmt.Errorf("message size too large [%d>%d]", size, MaxMessageSize)
 	}
-	w.maxMsgLength = val
+	w.settings.Store(maxMsgSizeIdx, uint32(size))
 	return nil
 }
 
@@ -143,7 +180,7 @@ func (w *Whisper) SetMinimumPoW(val float64) error {
 	if val <= 0.0 {
 		return fmt.Errorf("invalid PoW: %f", val)
 	}
-	w.minPoW = val
+	w.settings.Store(minPowIdx, val)
 	return nil
 }
 
@@ -240,6 +277,20 @@ func (w *Whisper) DeleteKeyPair(key string) bool {
 	return false
 }
 
+// AddKeyPair imports a asymmetric private key and returns it identifier.
+func (w *Whisper) AddKeyPair(key *ecdsa.PrivateKey) (string, error) {
+	id, err := GenerateRandomID()
+	if err != nil {
+		return "", fmt.Errorf("failed to generate ID: %s", err)
+	}
+
+	w.keyMu.Lock()
+	w.privateKeys[id] = key
+	w.keyMu.Unlock()
+
+	return id, nil
+}
+
 // HasKeyPair checks if the the whisper node is configured with the private key
 // of the specified public pair.
 func (w *Whisper) HasKeyPair(id string) bool {
@@ -451,7 +502,7 @@ func (wh *Whisper) runMessageLoop(p *Peer, rw p2p.MsgReadWriter) error {
 			log.Warn("message loop", "peer", p.peer.ID(), "err", err)
 			return err
 		}
-		if packet.Size > uint32(wh.maxMsgLength) {
+		if packet.Size > wh.MaxMessageSize() {
 			log.Warn("oversized message received", "peer", p.peer.ID())
 			return errors.New("oversized message received")
 		}
@@ -532,7 +583,7 @@ func (wh *Whisper) add(envelope *Envelope) (bool, error) {
 		}
 	}
 
-	if envelope.size() > wh.maxMsgLength {
+	if uint32(envelope.size()) > wh.MaxMessageSize() {
 		return false, fmt.Errorf("huge messages are not allowed [%x]", envelope.Hash())
 	}
 
@@ -547,7 +598,7 @@ func (wh *Whisper) add(envelope *Envelope) (bool, error) {
 		return false, fmt.Errorf("wrong size of AESNonce: %d bytes [env: %x]", aesNonceSize, envelope.Hash())
 	}
 
-	if envelope.PoW() < wh.minPoW {
+	if envelope.PoW() < wh.MinPow() {
 		log.Debug("envelope with low PoW dropped", "PoW", envelope.PoW(), "hash", envelope.Hash().Hex())
 		return false, nil // drop envelope without error
 	}
@@ -571,7 +622,9 @@ func (wh *Whisper) add(envelope *Envelope) (bool, error) {
 		log.Trace("whisper envelope already cached", "hash", envelope.Hash().Hex())
 	} else {
 		log.Trace("cached whisper envelope", "hash", envelope.Hash().Hex())
+		wh.statsMu.Lock()
 		wh.stats.memoryUsed += envelope.size()
+		wh.statsMu.Unlock()
 		wh.postEvent(envelope, false) // notify the local node about the new message
 		if wh.mailServer != nil {
 			wh.mailServer.Archive(envelope)
@@ -600,13 +653,13 @@ func (w *Whisper) checkOverflow() {
 	queueSize := len(w.messageQueue)
 
 	if queueSize == messageQueueLimit {
-		if !w.overflow {
-			w.overflow = true
+		if !w.Overflow() {
+			w.settings.Store(overflowIdx, true)
 			log.Warn("message queue overflow")
 		}
 	} else if queueSize <= messageQueueLimit/2 {
-		if w.overflow {
-			w.overflow = false
+		if w.Overflow() {
+			w.settings.Store(overflowIdx, false)
 			log.Warn("message queue overflow fixed (back to normal)")
 		}
 	}
@@ -653,6 +706,8 @@ func (w *Whisper) expire() {
 	w.poolMu.Lock()
 	defer w.poolMu.Unlock()
 
+	w.statsMu.Lock()
+	defer w.statsMu.Unlock()
 	w.stats.reset()
 	now := uint32(time.Now().Unix())
 	for expiry, hashSet := range w.expirations {
@@ -673,17 +728,11 @@ func (w *Whisper) expire() {
 }
 
 // Stats returns the whisper node statistics.
-func (w *Whisper) Stats() string {
-	result := fmt.Sprintf("Memory usage: %d bytes. Average messages cleared per expiry cycle: %d. Total messages cleared: %d.",
-		w.stats.memoryUsed, w.stats.totalMessagesCleared/w.stats.cycles, w.stats.totalMessagesCleared)
-	if w.stats.messagesCleared > 0 {
-		result += fmt.Sprintf(" Latest expiry cycle cleared %d messages (%d bytes).",
-			w.stats.messagesCleared, w.stats.memoryCleared)
-	}
-	if w.overflow {
-		result += " Message queue state: overflow."
-	}
-	return result
+func (w *Whisper) Stats() Statistics {
+	w.statsMu.Lock()
+	defer w.statsMu.Unlock()
+
+	return w.stats
 }
 
 // Envelopes retrieves all the messages currently pooled by the node.
@@ -734,15 +783,6 @@ func (s *Statistics) reset() {
 	s.messagesCleared = 0
 }
 
-// ValidateKeyID checks the format of key id.
-func ValidateKeyID(id string) error {
-	const target = keyIdSize * 2
-	if len(id) != target {
-		return fmt.Errorf("wrong size of key ID (expected %d bytes, got %d)", target, len(id))
-	}
-	return nil
-}
-
 // ValidatePublicKey checks the format of the given public key.
 func ValidatePublicKey(k *ecdsa.PublicKey) bool {
 	return k != nil && k.X != nil && k.Y != nil && k.X.Sign() != 0 && k.Y.Sign() != 0

whisper/whisperv5/whisper_test.go

@@ -18,13 +18,14 @@ package whisperv5
 
 import (
 	"bytes"
+	"crypto/ecdsa"
 	mrand "math/rand"
 	"testing"
 	"time"
 )
 
 func TestWhisperBasic(t *testing.T) {
-	w := New()
+	w := New(&DefaultConfig)
 	p := w.Protocols()
 	shh := p[0]
 	if shh.Name != ProtocolName {
@@ -117,8 +118,39 @@ func TestWhisperBasic(t *testing.T) {
 	}
 }
 
+func TestWhisperAsymmetricKeyImport(t *testing.T) {
+	var (
+		w           = New(&DefaultConfig)
+		privateKeys []*ecdsa.PrivateKey
+	)
+
+	for i := 0; i < 50; i++ {
+		id, err := w.NewKeyPair()
+		if err != nil {
+			t.Fatalf("could not generate key: %v", err)
+		}
+
+		pk, err := w.GetPrivateKey(id)
+		if err != nil {
+			t.Fatalf("could not export private key: %v", err)
+		}
+
+		privateKeys = append(privateKeys, pk)
+
+		if !w.DeleteKeyPair(id) {
+			t.Fatalf("could not delete private key")
+		}
+	}
+
+	for _, pk := range privateKeys {
+		if _, err := w.AddKeyPair(pk); err != nil {
+			t.Fatalf("could not import private key: %v", err)
+		}
+	}
+}
+
 func TestWhisperIdentityManagement(t *testing.T) {
-	w := New()
+	w := New(&DefaultConfig)
 	id1, err := w.NewKeyPair()
 	if err != nil {
 		t.Fatalf("failed to generate new key pair: %s.", err)
@@ -240,7 +272,7 @@ func TestWhisperSymKeyManagement(t *testing.T) {
 
 	var err error
 	var k1, k2 []byte
-	w := New()
+	w := New(&DefaultConfig)
 	id1 := string("arbitrary-string-1")
 	id2 := string("arbitrary-string-2")
 
@@ -443,7 +475,7 @@ func TestWhisperSymKeyManagement(t *testing.T) {
 func TestExpiry(t *testing.T) {
 	InitSingleTest()
 
-	w := New()
+	w := New(&DefaultConfig)
 	w.SetMinimumPoW(0.0000001)
 	defer w.SetMinimumPoW(DefaultMinimumPoW)
 	w.Start(nil)
@@ -500,9 +532,9 @@ func TestExpiry(t *testing.T) {
 func TestCustomization(t *testing.T) {
 	InitSingleTest()
 
-	w := New()
+	w := New(&DefaultConfig)
 	defer w.SetMinimumPoW(DefaultMinimumPoW)
-	defer w.SetMaxMessageLength(DefaultMaxMessageLength)
+	defer w.SetMaxMessageSize(DefaultMaxMessageSize)
 	w.Start(nil)
 	defer w.Stop()
 
@@ -547,13 +579,13 @@ func TestCustomization(t *testing.T) {
 	if err != nil {
 		t.Fatalf("failed Wrap with seed %d: %s.", seed, err)
 	}
-	w.SetMaxMessageLength(env.size() - 1)
+	w.SetMaxMessageSize(uint32(env.size() - 1))
 	err = w.Send(env)
 	if err == nil {
 		t.Fatalf("successfully sent oversized envelope (seed %d): false positive.", seed)
 	}
 
-	w.SetMaxMessageLength(DefaultMaxMessageLength)
+	w.SetMaxMessageSize(DefaultMaxMessageSize)
 	err = w.Send(env)
 	if err != nil {
 		t.Fatalf("failed to send second envelope with seed %d: %s.", seed, err)