| package iso |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import ( |
| "math/rand" |
| "strings" |
| "time" |
| |
| "github.com/GehirnInc/crypt/md5_crypt" |
| ) |
| |
| // crypt acts Perl's built-in crypt() function, which in turn |
| // acts like the crypt(3) function in the C library. |
| func crypt(password, salt string) (string, error) { |
| h := md5_crypt.New() |
| // The MagicPrefix ('$1$') is used to identify the algorithm (MD5-based in this case). |
| // See https://en.wikipedia.org/wiki/Crypt_(C) for more information. |
| return h.Generate([]byte(password), []byte(md5_crypt.MagicPrefix+salt)) |
| } |
| |
| // saltChars are the possible characters rndSalt may use to generate a salt string. |
| const saltChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" |
| |
| // rndSalt creates a random sequence of characters of given length. |
| // Suitable for use as the salt parameter with the crypt function. |
| func rndSalt(length int) string { |
| rng := rand.New(rand.NewSource(time.Now().UnixNano())) |
| |
| var out strings.Builder |
| out.Grow(length) |
| |
| for i := 0; i < length; i++ { |
| out.WriteRune( |
| rune(saltChars[rng.Intn(len(saltChars))]), |
| ) |
| } |
| |
| return out.String() |
| } |