mirror of
https://github.com/nabbar/golib.git
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97e70d063f
- fix security arbitrary path - fix linter Package AWS: - implement resolver v2 Package Cobra: - fix linter Package Config/component: - fix linter Package Context/Config: - Add function to set context Package Database/KV...: - Fix error - Fix collision pointer - Fix models - Fix circular dependencies - Add function Delete on driver, table and item - Add function new on drvier to prevent collision data when create item on table get / walk Package Duration: - Add type Duration based on time.Duration to allow transform duration to string instead of int64 nanosecond - Add function to parse in json, yaml, toml, text, cbor - Add function to allow convert type into mapstructure (spf13 viper, cobra...) Package File/Perm: - Add type Perm based on os.FileMode to allow marshall / unmashall it into octal form instead of string representation (-rwxrwxrwx) - Add function to marshall / unmarshall in json, yaml, toml, text, cbor - Add function to allow convert type into mapstructure (spf13 viper, cobra...) Package File/progress: - Fix linter Package HTTPServer : - Fix linter - Fix security by adding a default value if not set on config Package ioutils: - Fix Linter Package LDAP: - Add Clone function Package logger/hookfile: - Fix linter Package nats: - Fix linter Package Network/Protocol: - Fix bug with quote / Dbl Quote on unmarshall Package Password: - Replace password with crypto rand instead of math rand Package Size: - Fix potential overflow - Add function to format value into Int32, Int, Uint32, Uint, Float32 - Add function to parse Float64 into type Size Package Socket: - change config uint32 to golib Size, time.Duration to golib Duration - add TLS managment to server TCP, discard for UDP & Unix file Local Domain - add function Info Server to print information of server when listen is starting
73 lines
2.2 KiB
Go
73 lines
2.2 KiB
Go
/*
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* MIT License
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*
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* Copyright (c) 2019 Nicolas JUHEL
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package password
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import (
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"crypto/rand"
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"math/big"
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)
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const letterBytes = "abcdefghijklmnopqrstuvwxyz,;:!?./*%^$&\"'(-_)=+~#{[|`\\^@]}ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
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const (
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// If we have 93 chars, that means 7 bits code a letter index.
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// So 63 random bits can designate 63/7 = 9 different letter indices.
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// Let's use all those 10.
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letterIdxBits = 7 // 6 bits to represent a letter index
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letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
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letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
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loopRandMaxLen = 10
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)
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func randIdx() int {
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size := int64(len(letterBytes))
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for n := 0; n < 100; n++ {
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if i, e := rand.Int(rand.Reader, big.NewInt(size+1)); e != nil {
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return 0
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} else {
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j := i.Int64()
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if j > 0 && j < size {
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return int(j)
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}
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}
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}
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return 0
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}
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func Generate(n int) string {
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b := make([]byte, n)
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// A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
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for i := n - 1; i >= 0; {
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b[i] = letterBytes[randIdx()]
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i--
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}
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return string(b)
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}
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