func (c *BasicChallengeHandler) HandleChallenge(requestURL string, headers http.Header) (http.Header, bool, error) {
if c.prompted {
glog.V(2).Info("already prompted for challenge, won't prompt again")
return nil, false, nil
}
if c.handled {
glog.V(2).Info("already handled basic challenge")
return nil, false, nil
}
username := c.Username
password := c.Password
missingUsername := len(username) == 0
missingPassword := len(password) == 0
if (missingUsername || missingPassword) && c.Reader != nil {
w := c.Writer
if w == nil {
w = os.Stdout
}
if _, realm := basicRealm(headers); len(realm) > 0 {
fmt.Fprintf(w, "Authentication required for %s (%s)\n", c.Host, realm)
} else {
fmt.Fprintf(w, "Authentication required for %s\n", c.Host)
}
if missingUsername {
username = util.PromptForString(c.Reader, w, "Username: "******"Username: %s\n", username)
}
if missingPassword {
password = util.PromptForPasswordString(c.Reader, w, "Password: "******":") {
return nil, false, fmt.Errorf("username %s is invalid for basic auth", username)
}
responseHeaders := http.Header{}
responseHeaders.Set("Authorization", getBasicHeader(username, password))
// remember so we don't re-handle non-interactively
c.handled = true
return responseHeaders, true, nil
}
glog.V(2).Info("no username or password available")
return nil, false, nil
}
func (c *BasicChallengeHandler) HandleChallenge(headers http.Header) (http.Header, bool, error) {
if c.prompted {
glog.V(2).Info("already prompted for challenge, won't prompt again")
return nil, false, nil
}
if c.Reader == nil && c.handled {
glog.V(2).Info("already handled basic challenge, no reader to alter inputs")
return nil, false, nil
}
username := c.Username
password := c.Password
missingUsername := len(username) == 0
missingPassword := len(password) == 0
if (missingUsername || missingPassword) && c.Reader != nil {
w := c.Writer
if w == nil {
w = os.Stdout
}
if _, realm := basicRealm(headers); len(realm) > 0 {
fmt.Fprintf(w, "Authentication required for %s (%s)\n", c.Host, realm)
} else {
fmt.Fprintf(w, "Authentication required for %s\n", c.Host)
}
if missingUsername {
username = util.PromptForString(c.Reader, w, "Username: "******"Username: %s\n", username)
}
if missingPassword {
password = util.PromptForPasswordString(c.Reader, w, "Password: "******"Authorization", getBasicHeader(username, password))
// remember so we don't re-handle non-interactively
c.handled = true
return responseHeaders, true, nil
}
glog.V(2).Info("no username or password available")
return nil, false, nil
}
// Do watches for unauthorized challenges. If we know to respond, we respond to the challenge
func (client *challengingClient) Do(req *http.Request) (*http.Response, error) {
// Set custom header required by server to avoid CSRF attacks on browsers using basic auth
if req.Header == nil {
req.Header = http.Header{}
}
req.Header.Set(CSRFTokenHeader, "1")
resp, err := client.delegate.Do(req)
if err != nil {
return nil, err
}
if resp.StatusCode == http.StatusUnauthorized {
if wantsBasicAuth, realm := isBasicAuthChallenge(resp); wantsBasicAuth {
username := client.defaultUsername
password := client.defaultPassword
missingUsername := len(username) == 0
missingPassword := len(password) == 0
url := *req.URL
url.Path, url.RawQuery, url.Fragment = "", "", ""
if (missingUsername || missingPassword) && client.reader != nil {
fmt.Printf("Authentication required for %s (%s)\n", &url, realm)
if missingUsername {
username = util.PromptForString(client.reader, "Username: "******"Password: ")
}
}
if len(username) > 0 || len(password) > 0 {
client.delegate.Transport = kclient.NewBasicAuthRoundTripper(username, password, client.delegate.Transport)
return client.delegate.Do(resp.Request)
}
}
}
return resp, err
}
func (o *EncryptOptions) Encrypt() error {
// Get data
var data []byte
var warnWhitespace = true
switch {
case len(o.CleartextFile) > 0:
if d, err := ioutil.ReadFile(o.CleartextFile); err != nil {
return err
} else {
data = d
}
case len(o.CleartextData) > 0:
// Don't warn in cases where we're explicitly being given the data to use
warnWhitespace = false
data = o.CleartextData
case o.CleartextReader != nil && util.IsTerminalReader(o.CleartextReader) && o.PromptWriter != nil:
// Read a single line from stdin with prompting
data = []byte(util.PromptForString(o.CleartextReader, o.PromptWriter, "Data to encrypt: "))
case o.CleartextReader != nil:
// Read data from stdin without prompting (allows binary data and piping)
if d, err := ioutil.ReadAll(o.CleartextReader); err != nil {
return err
} else {
data = d
}
}
if warnWhitespace && (o.PromptWriter != nil) && (len(data) > 0) {
r1, _ := utf8.DecodeRune(data)
r2, _ := utf8.DecodeLastRune(data)
if unicode.IsSpace(r1) || unicode.IsSpace(r2) {
fmt.Fprintln(o.PromptWriter, "Warning: Data includes leading or trailing whitespace, which will be included in the encrypted value")
}
}
// Get key
var key []byte
switch {
case len(o.KeyFile) > 0:
if block, ok, err := pemutil.BlockFromFile(o.KeyFile, configapi.StringSourceKeyBlockType); err != nil {
return err
} else if !ok {
return fmt.Errorf("%s does not contain a valid PEM block of type %q", o.KeyFile, configapi.StringSourceKeyBlockType)
} else if len(block.Bytes) == 0 {
return fmt.Errorf("%s does not contain a key", o.KeyFile)
} else {
key = block.Bytes
}
case len(o.GenKeyFile) > 0:
key = make([]byte, 32)
if _, err := rand.Read(key); err != nil {
return err
}
}
if len(key) == 0 {
return errors.New("--genkey or --key is required")
}
// Encrypt
dataBlock, err := x509.EncryptPEMBlock(rand.Reader, configapi.StringSourceEncryptedBlockType, data, key, x509.PEMCipherAES256)
if err != nil {
return err
}
// Write data
if len(o.EncryptedFile) > 0 {
if err := pemutil.BlockToFile(o.EncryptedFile, dataBlock, os.FileMode(0644)); err != nil {
return err
}
} else if o.EncryptedWriter != nil {
encryptedBytes, err := pemutil.BlockToBytes(dataBlock)
if err != nil {
return err
}
n, err := o.EncryptedWriter.Write(encryptedBytes)
if err != nil {
return err
}
if n != len(encryptedBytes) {
return fmt.Errorf("could not completely write encrypted data")
}
}
// Write key
if len(o.GenKeyFile) > 0 {
keyBlock := &pem.Block{Bytes: key, Type: configapi.StringSourceKeyBlockType}
if err := pemutil.BlockToFile(o.GenKeyFile, keyBlock, os.FileMode(0600)); err != nil {
return err
}
}
return nil
}
// Negotiate a bearer token with the auth server, or try to reuse one based on the
// information already present. In case of any missing information, ask for user input
// (usually username and password, interactive depending on the Reader).
func (o *LoginOptions) gatherAuthInfo() error {
directClientConfig, err := o.getClientConfig()
if err != nil {
return err
}
// make a copy and use it to avoid mutating the original
t := *directClientConfig
clientConfig := &t
// if a token were explicitly provided, try to use it
if o.tokenProvided() {
clientConfig.BearerToken = o.Token
if osClient, err := client.New(clientConfig); err == nil {
me, err := whoAmI(osClient)
if err == nil {
o.Username = me.Name
o.Config = clientConfig
fmt.Fprintf(o.Out, "Logged into %q as %q using the token provided.\n\n", o.Config.Host, o.Username)
return nil
}
if !kerrors.IsUnauthorized(err) {
return err
}
fmt.Fprintln(o.Out, "The token provided is invalid (probably expired).\n")
}
}
// if a token was provided try to make use of it
// make sure we have a username before continuing
if !o.usernameProvided() {
if cmdutil.IsTerminal(o.Reader) {
for !o.usernameProvided() {
o.Username = cmdutil.PromptForString(o.Reader, "Username: "******"Already logged into %q as %q.\n\n", o.Config.Host, o.Username)
}
return nil
}
}
}
}
}
// if kubeconfig doesn't already have a matching user stanza...
clientConfig.BearerToken = ""
clientConfig.CertData = []byte{}
clientConfig.KeyData = []byte{}
clientConfig.CertFile = o.CertFile
clientConfig.KeyFile = o.KeyFile
token, err := tokencmd.RequestToken(o.Config, o.Reader, o.Username, o.Password)
if err != nil {
return err
}
clientConfig.BearerToken = token
osClient, err := client.New(clientConfig)
if err != nil {
return err
}
me, err := whoAmI(osClient)
if err != nil {
return err
}
o.Username = me.Name
o.Config = clientConfig
fmt.Fprintln(o.Out, "Login successful.\n")
return nil
}