config.go 2.29 KB
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package config

import (
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	"crypto"
	"crypto/x509"
	"encoding/base64"
	"errors"
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	"os"
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	u "github.com/jbenet/go-ipfs/util"
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)

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// Identity tracks the configuration of the local node's identity.
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type Identity struct {
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	PeerID  string
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	PrivKey string
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	Address string
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}

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// Datastore tracks the configuration of the datastore.
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type Datastore struct {
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	Type string
	Path string
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}

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type SavedPeer struct {
	Address string
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	PeerID  string // until multiaddr supports ipfs, use another field.
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}

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// Config is used to load IPFS config files.
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type Config struct {
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	Identity   *Identity    // local node's peer identity
	Datastore  Datastore    // local node's storage
	RPCAddress string       // local node's RPC address
	Peers      []*SavedPeer // local nodes's bootstrap peers
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}

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const DefaultPathRoot = "~/.go-ipfs"
const DefaultConfigFilePath = DefaultPathRoot + "/config"
const DefaultConfigFile = `{
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  "identity": {},
  "datastore": {
    "type": "leveldb",
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    "path": "` + DefaultPathRoot + `/datastore"
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  }
}
`

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func (i *Identity) DecodePrivateKey(passphrase string) (crypto.PrivateKey, error) {
	pkb, err := base64.StdEncoding.DecodeString(i.PrivKey)
	if err != nil {
		return nil, err
	}

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	// currently storing key unencrypted. in the future we need to encrypt it.
	// TODO(security)
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	return x509.ParsePKCS1PrivateKey(pkb)
}

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// Filename returns the proper tilde expanded config filename.
func Filename(filename string) (string, error) {
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	if len(filename) == 0 {
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		filename = DefaultConfigFilePath
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	}

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	// tilde expansion on config file
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	return u.TildeExpansion(filename)
}

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// Load reads given file and returns the read config, or error.
func Load(filename string) (*Config, error) {
	filename, err := Filename(filename)
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	if err != nil {
		return nil, err
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	}

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	// if nothing is there, fail. User must run 'ipfs init'
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	if _, err := os.Stat(filename); os.IsNotExist(err) {
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		return nil, errors.New("ipfs not initialized, please run 'ipfs init'")
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	}

	var cfg Config
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	err = ReadConfigFile(filename, &cfg)
	if err != nil {
		return nil, err
	}

	// tilde expansion on datastore path
	cfg.Datastore.Path, err = u.TildeExpansion(cfg.Datastore.Path)
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	if err != nil {
		return nil, err
	}

	return &cfg, err
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}
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// Set sets the value of a particular config key
func Set(filename, key, value string) error {
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	return WriteConfigKey(filename, key, value)
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}