mirror of
https://github.com/go-gitea/gitea
synced 2024-10-31 15:24:25 +00:00
623c93ff46
- The current implementation of `RandomString` doesn't give you a most-possible unique randomness. It gives you 6*`length` instead of the possible 8*`length` bits(or as `length`x bytes) randomness. This is because `RandomString` is being limited to a max value of 63, this in order to represent the random byte as a letter/digit.
- The recommendation of pbkdf2 is to use 64+ bit salt, which the `RandomString` doesn't give with a length of 10, instead of increasing 10 to a higher number, this patch adds a new function called `RandomBytes` which does give you the guarentee of 8*`length` randomness and thus corresponding of `length`x bytes randomness.
- Use hexadecimal to store the bytes value in the database, as mentioned, it doesn't play nice in order to convert it to a string. This will always be a length of 32(with `length` being 16).
- When we detect on `Authenticate`(source: db) that a user has the old format of salt, re-hash the password such that the user will have it's password hashed with increased salt.
Thanks to @zeripath for working out the rouge edges from my first commit 😄.
Co-authored-by: lafriks <lauris@nix.lv>
Co-authored-by: zeripath <art27@cantab.net>
173 lines
3.9 KiB
Go
173 lines
3.9 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package util
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import (
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"bytes"
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"crypto/rand"
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"errors"
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"math/big"
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"strconv"
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"strings"
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)
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// OptionalBool a boolean that can be "null"
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type OptionalBool byte
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const (
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// OptionalBoolNone a "null" boolean value
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OptionalBoolNone OptionalBool = iota
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// OptionalBoolTrue a "true" boolean value
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OptionalBoolTrue
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// OptionalBoolFalse a "false" boolean value
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OptionalBoolFalse
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)
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// IsTrue return true if equal to OptionalBoolTrue
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func (o OptionalBool) IsTrue() bool {
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return o == OptionalBoolTrue
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}
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// IsFalse return true if equal to OptionalBoolFalse
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func (o OptionalBool) IsFalse() bool {
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return o == OptionalBoolFalse
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}
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// IsNone return true if equal to OptionalBoolNone
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func (o OptionalBool) IsNone() bool {
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return o == OptionalBoolNone
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}
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// OptionalBoolOf get the corresponding OptionalBool of a bool
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func OptionalBoolOf(b bool) OptionalBool {
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if b {
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return OptionalBoolTrue
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}
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return OptionalBoolFalse
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}
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// OptionalBoolParse get the corresponding OptionalBool of a string using strconv.ParseBool
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func OptionalBoolParse(s string) OptionalBool {
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b, e := strconv.ParseBool(s)
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if e != nil {
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return OptionalBoolNone
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}
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return OptionalBoolOf(b)
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}
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// Max max of two ints
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func Max(a, b int) int {
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if a < b {
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return b
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}
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return a
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}
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// Min min of two ints
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func Min(a, b int) int {
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if a > b {
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return b
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}
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return a
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}
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// IsEmptyString checks if the provided string is empty
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func IsEmptyString(s string) bool {
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return len(strings.TrimSpace(s)) == 0
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}
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// NormalizeEOL will convert Windows (CRLF) and Mac (CR) EOLs to UNIX (LF)
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func NormalizeEOL(input []byte) []byte {
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var right, left, pos int
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if right = bytes.IndexByte(input, '\r'); right == -1 {
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return input
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}
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length := len(input)
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tmp := make([]byte, length)
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// We know that left < length because otherwise right would be -1 from IndexByte.
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copy(tmp[pos:pos+right], input[left:left+right])
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pos += right
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tmp[pos] = '\n'
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left += right + 1
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pos++
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for left < length {
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if input[left] == '\n' {
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left++
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}
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right = bytes.IndexByte(input[left:], '\r')
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if right == -1 {
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copy(tmp[pos:], input[left:])
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pos += length - left
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break
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}
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copy(tmp[pos:pos+right], input[left:left+right])
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pos += right
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tmp[pos] = '\n'
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left += right + 1
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pos++
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}
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return tmp[:pos]
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}
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// MergeInto merges pairs of values into a "dict"
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func MergeInto(dict map[string]interface{}, values ...interface{}) (map[string]interface{}, error) {
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for i := 0; i < len(values); i++ {
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switch key := values[i].(type) {
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case string:
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i++
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if i == len(values) {
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return nil, errors.New("specify the key for non array values")
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}
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dict[key] = values[i]
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case map[string]interface{}:
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m := values[i].(map[string]interface{})
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for i, v := range m {
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dict[i] = v
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}
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default:
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return nil, errors.New("dict values must be maps")
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}
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}
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return dict, nil
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}
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// RandomInt returns a random integer between 0 and limit, inclusive
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func RandomInt(limit int64) (int64, error) {
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rInt, err := rand.Int(rand.Reader, big.NewInt(limit))
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if err != nil {
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return 0, err
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}
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return rInt.Int64(), nil
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}
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const letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
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// RandomString generates a random alphanumerical string
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func RandomString(length int64) (string, error) {
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bytes := make([]byte, length)
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limit := int64(len(letters))
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for i := range bytes {
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num, err := RandomInt(limit)
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if err != nil {
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return "", err
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}
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bytes[i] = letters[num]
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}
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return string(bytes), nil
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}
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// RandomBytes generates `length` bytes
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// This differs from RandomString, as RandomString is limits each byte to have
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// a maximum value of 63 instead of 255(max byte size)
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func RandomBytes(length int64) ([]byte, error) {
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bytes := make([]byte, length)
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_, err := rand.Read(bytes)
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return bytes, err
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}
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