mirror of https://github.com/docker/cli.git
234 lines
7.6 KiB
Go
234 lines
7.6 KiB
Go
package configfile
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import (
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"encoding/base64"
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"encoding/json"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"github.com/docker/cli/opts"
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"github.com/docker/docker/api/types"
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"github.com/pkg/errors"
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)
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const (
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// This constant is only used for really old config files when the
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// URL wasn't saved as part of the config file and it was just
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// assumed to be this value.
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defaultIndexserver = "https://index.docker.io/v1/"
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)
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// ConfigFile ~/.docker/config.json file info
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type ConfigFile struct {
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AuthConfigs map[string]types.AuthConfig `json:"auths"`
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HTTPHeaders map[string]string `json:"HttpHeaders,omitempty"`
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PsFormat string `json:"psFormat,omitempty"`
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ImagesFormat string `json:"imagesFormat,omitempty"`
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NetworksFormat string `json:"networksFormat,omitempty"`
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PluginsFormat string `json:"pluginsFormat,omitempty"`
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VolumesFormat string `json:"volumesFormat,omitempty"`
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StatsFormat string `json:"statsFormat,omitempty"`
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DetachKeys string `json:"detachKeys,omitempty"`
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CredentialsStore string `json:"credsStore,omitempty"`
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CredentialHelpers map[string]string `json:"credHelpers,omitempty"`
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Filename string `json:"-"` // Note: for internal use only
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ServiceInspectFormat string `json:"serviceInspectFormat,omitempty"`
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ServicesFormat string `json:"servicesFormat,omitempty"`
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TasksFormat string `json:"tasksFormat,omitempty"`
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SecretFormat string `json:"secretFormat,omitempty"`
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ConfigFormat string `json:"configFormat,omitempty"`
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NodesFormat string `json:"nodesFormat,omitempty"`
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PruneFilters []string `json:"pruneFilters,omitempty"`
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Proxies map[string]ProxyConfig `json:"proxies,omitempty"`
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}
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// ProxyConfig contains proxy configuration settings
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type ProxyConfig struct {
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HTTPProxy string `json:"httpProxy,omitempty"`
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HTTPSProxy string `json:"httpsProxy,omitempty"`
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NoProxy string `json:"noProxy,omitempty"`
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FTPProxy string `json:"ftpProxy,omitempty"`
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}
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// LegacyLoadFromReader reads the non-nested configuration data given and sets up the
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// auth config information with given directory and populates the receiver object
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func (configFile *ConfigFile) LegacyLoadFromReader(configData io.Reader) error {
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b, err := ioutil.ReadAll(configData)
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if err != nil {
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return err
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}
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if err := json.Unmarshal(b, &configFile.AuthConfigs); err != nil {
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arr := strings.Split(string(b), "\n")
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if len(arr) < 2 {
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return errors.Errorf("The Auth config file is empty")
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}
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authConfig := types.AuthConfig{}
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origAuth := strings.Split(arr[0], " = ")
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if len(origAuth) != 2 {
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return errors.Errorf("Invalid Auth config file")
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}
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authConfig.Username, authConfig.Password, err = decodeAuth(origAuth[1])
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if err != nil {
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return err
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}
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authConfig.ServerAddress = defaultIndexserver
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configFile.AuthConfigs[defaultIndexserver] = authConfig
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} else {
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for k, authConfig := range configFile.AuthConfigs {
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authConfig.Username, authConfig.Password, err = decodeAuth(authConfig.Auth)
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if err != nil {
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return err
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}
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authConfig.Auth = ""
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authConfig.ServerAddress = k
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configFile.AuthConfigs[k] = authConfig
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}
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}
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return nil
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}
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// LoadFromReader reads the configuration data given and sets up the auth config
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// information with given directory and populates the receiver object
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func (configFile *ConfigFile) LoadFromReader(configData io.Reader) error {
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if err := json.NewDecoder(configData).Decode(&configFile); err != nil {
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return err
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}
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var err error
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for addr, ac := range configFile.AuthConfigs {
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ac.Username, ac.Password, err = decodeAuth(ac.Auth)
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if err != nil {
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return err
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}
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ac.Auth = ""
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ac.ServerAddress = addr
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configFile.AuthConfigs[addr] = ac
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}
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return nil
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}
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// ContainsAuth returns whether there is authentication configured
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// in this file or not.
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func (configFile *ConfigFile) ContainsAuth() bool {
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return configFile.CredentialsStore != "" ||
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len(configFile.CredentialHelpers) > 0 ||
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len(configFile.AuthConfigs) > 0
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}
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// SaveToWriter encodes and writes out all the authorization information to
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// the given writer
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func (configFile *ConfigFile) SaveToWriter(writer io.Writer) error {
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// Encode sensitive data into a new/temp struct
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tmpAuthConfigs := make(map[string]types.AuthConfig, len(configFile.AuthConfigs))
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for k, authConfig := range configFile.AuthConfigs {
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authCopy := authConfig
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// encode and save the authstring, while blanking out the original fields
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authCopy.Auth = encodeAuth(&authCopy)
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authCopy.Username = ""
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authCopy.Password = ""
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authCopy.ServerAddress = ""
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tmpAuthConfigs[k] = authCopy
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}
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saveAuthConfigs := configFile.AuthConfigs
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configFile.AuthConfigs = tmpAuthConfigs
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defer func() { configFile.AuthConfigs = saveAuthConfigs }()
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data, err := json.MarshalIndent(configFile, "", "\t")
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if err != nil {
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return err
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}
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_, err = writer.Write(data)
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return err
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}
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// Save encodes and writes out all the authorization information
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func (configFile *ConfigFile) Save() error {
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if configFile.Filename == "" {
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return errors.Errorf("Can't save config with empty filename")
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}
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if err := os.MkdirAll(filepath.Dir(configFile.Filename), 0700); err != nil {
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return err
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}
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f, err := os.OpenFile(configFile.Filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
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if err != nil {
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return err
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}
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defer f.Close()
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return configFile.SaveToWriter(f)
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}
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// ParseProxyConfig computes proxy configuration by retreiving the config for the provided host and
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// then checking this against any environment variables provided to the container
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func (configFile *ConfigFile) ParseProxyConfig(host string, runOpts []string) map[string]*string {
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var cfgKey string
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if _, ok := configFile.Proxies[host]; !ok {
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cfgKey = "default"
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} else {
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cfgKey = host
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}
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config := configFile.Proxies[cfgKey]
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permitted := map[string]*string{
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"HTTP_PROXY": &config.HTTPProxy,
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"HTTPS_PROXY": &config.HTTPSProxy,
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"NO_PROXY": &config.NoProxy,
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"FTP_PROXY": &config.FTPProxy,
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}
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m := opts.ConvertKVStringsToMapWithNil(runOpts)
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for k := range permitted {
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if *permitted[k] == "" {
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continue
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}
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if _, ok := m[k]; !ok {
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m[k] = permitted[k]
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}
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if _, ok := m[strings.ToLower(k)]; !ok {
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m[strings.ToLower(k)] = permitted[k]
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}
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}
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return m
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}
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// encodeAuth creates a base64 encoded string to containing authorization information
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func encodeAuth(authConfig *types.AuthConfig) string {
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if authConfig.Username == "" && authConfig.Password == "" {
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return ""
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}
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authStr := authConfig.Username + ":" + authConfig.Password
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msg := []byte(authStr)
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encoded := make([]byte, base64.StdEncoding.EncodedLen(len(msg)))
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base64.StdEncoding.Encode(encoded, msg)
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return string(encoded)
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}
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// decodeAuth decodes a base64 encoded string and returns username and password
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func decodeAuth(authStr string) (string, string, error) {
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if authStr == "" {
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return "", "", nil
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}
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decLen := base64.StdEncoding.DecodedLen(len(authStr))
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decoded := make([]byte, decLen)
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authByte := []byte(authStr)
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n, err := base64.StdEncoding.Decode(decoded, authByte)
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if err != nil {
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return "", "", err
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}
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if n > decLen {
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return "", "", errors.Errorf("Something went wrong decoding auth config")
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}
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arr := strings.SplitN(string(decoded), ":", 2)
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if len(arr) != 2 {
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return "", "", errors.Errorf("Invalid auth configuration file")
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}
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password := strings.Trim(arr[1], "\x00")
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return arr[0], password, nil
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}
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