42 lines
1.3 KiB
Go
42 lines
1.3 KiB
Go
/*
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* Amsterdam Web Communities System
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* Copyright (c) 2025 Erbosoft Metaverse Design Solutions, All Rights Reserved
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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// Package util contains utility definitions.
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package util
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import (
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crand "crypto/rand"
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"io"
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mrand "math/rand"
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)
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// authAlphabet is the set of characters from which we generate auth strings.
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const authAlphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz./"
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// authStringLen is the standard lengtth of authentication strings.
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const authStringLen = 32
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// GenerateRandomAuthString generates a random authentication string.
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func GenerateRandomAuthString() string {
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b := make([]byte, authStringLen)
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if _, err := io.ReadFull(crand.Reader, b); err != nil {
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// can't happen (at least on a modern OS)
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panic("failed to read random: " + err.Error())
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}
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for i := 0; i < authStringLen; i++ {
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b[i] = authAlphabet[int(b[i])%len(authAlphabet)]
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}
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return string(b)
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}
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// GenerateRandomConfirmationNumber generates a random 7-digit confirmation number.
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func GenerateRandomConfirmationNumber() int32 {
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return mrand.Int31n(9000000) + 1000000
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}
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