Add bcrypt hash function

README.md

@@ -66,6 +66,7 @@ Returns the hash representation of an input in different hash formats:
 - sha3_256
 - sha3_512
 - sha512
+- bcrypt
 
 ## JWT command
 Decodes a jwt and pretty prints the resulting json.

cmd/hash/brypt.go

@@ -0,0 +1,55 @@
+// Copyright © 2018 Christian Claus <ch.claus@me.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package hash
+
+import (
+	"golang.org/x/crypto/bcrypt"
+	"errors"
+	"github.com/spf13/cobra"
+	"fmt"
+)
+
+var cost int
+
+// bcryptCmd represents the bcrypt command
+var bcryptCmd = &cobra.Command{
+	Use:   "bcrypt",
+	Short: "Returns the bcrypt hash representation of the input",
+	Long:  "Returns the bcrypt hash representation of the input.",
+	Args: func(cmd *cobra.Command, args []string) error {
+		if len(args) != 1 {
+			return errors.New("You have to specify the text that should be hashed.")
+		}
+
+		return nil
+	},
+	Run: func(cmd *cobra.Command, args []string) {
+		genHash, _ := bcrypt.GenerateFromPassword([]byte(args[0]), cost)
+
+		fmt.Println(string(genHash))
+	},
+}
+
+func init() {
+	hashCmd.AddCommand(bcryptCmd)
+
+	bcryptCmd.Flags().IntVarP(&cost, "cost", "c", 10, "defines the costs of the bcrypt algorithm")
+}