feat: Allow user multiple keys with userkey create

And end user may have more than one ssh key, the userkey create
command should be able to accept more than one key so you can do
something like:

   curl https://github.com/USER.keys | ssh sshportal -p 2222 -l admin userkey create USER

The userkey create command also does not work properly from an
interactive shell due to the use of bufio.  This patch adds the
ability to use either the interactive shell or direct ssh command to
input one or more keys.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

pkg/bastion/shell.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"net/url"
 	"os"
 	"regexp"
@@ -2017,34 +2018,58 @@ GLOBAL OPTIONS:
 							return err
 						}
 
-						fmt.Fprintf(s, "Enter key:\n")
-						reader := bufio.NewReader(s)
-						text, _ := reader.ReadString('\n')
-
-						key, comment, _, _, err := ssh.ParseAuthorizedKey([]byte(text))
-						if err != nil {
-							return err
+						var reader *bufio.Reader
+						var term *terminal.Terminal
+						if len(sshCommand) == 0 { // interactive mode
+							term = terminal.NewTerminal(s, "Paste your key(s) and end with a blank line> ")
+						} else {
+							fmt.Fprintf(s, "Enter key(s):\n")
+							reader = bufio.NewReader(s)
 						}
 
-						userkey := dbmodels.UserKey{
-							User:          &user,
-							Key:           key.Marshal(),
-							Comment:       comment,
-							AuthorizedKey: string(gossh.MarshalAuthorizedKey(key)),
-						}
-						if c.String("comment") != "" {
-							userkey.Comment = c.String("comment")
-						}
+						for {
+							var text string
+							var errReadline error
+							if len(sshCommand) == 0 { // interactive mode
+								text, errReadline = term.ReadLine()
+							} else {
+								text, errReadline = reader.ReadString('\n')
+							}
+							if errReadline != nil && errReadline != io.EOF {
+								return errReadline
+							}
+							if text != "" && text != "\n" {
+								key, comment, _, _, err := ssh.ParseAuthorizedKey([]byte(text))
+								if err != nil {
+									return err
+								}
 
-						if _, err := govalidator.ValidateStruct(userkey); err != nil {
-							return err
-						}
+								userkey := dbmodels.UserKey{
+									User:          &user,
+									Key:           key.Marshal(),
+									Comment:       comment,
+									AuthorizedKey: string(gossh.MarshalAuthorizedKey(key)),
+								}
+								if c.String("comment") != "" {
+									userkey.Comment = c.String("comment")
+								}
 
-						// save the userkey in database
-						if err := db.Create(&userkey).Error; err != nil {
-							return err
+								if _, err := govalidator.ValidateStruct(userkey); err != nil {
+									return err
+								}
+
+								// save the userkey in database
+								if err := db.Create(&userkey).Error; err != nil {
+									return err
+								}
+								fmt.Fprintf(s, "%d\n", userkey.ID)
+								if errReadline == io.EOF {
+									return nil
+								}
+							} else {
+								break
+							}
 						}
-						fmt.Fprintf(s, "%d\n", userkey.ID)
 						return nil
 					},
 				}, {