65 lines
1.3 KiB
Go
65 lines
1.3 KiB
Go
/*
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* Copyright 2022 Oleg Borodin <borodin@unix7.org>
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*/
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package dsrpc
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import (
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"encoding/json"
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"bytes"
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"math/rand"
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"time"
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"crypto/sha256"
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)
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func init() {
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rand.Seed(time.Now().UnixNano())
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}
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type Auth struct {
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Ident []byte `msgpack:"ident" json:"ident"`
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Salt []byte `msgpack:"salt" json:"salt"`
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Hash []byte `msgpack:"hash" json:"hash"`
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}
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func NewAuth() *Auth {
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return &Auth{}
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}
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func (this *Auth) JSON() []byte {
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jBytes, _ := json.Marshal(this)
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return jBytes
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}
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func CreateAuth(ident, pass []byte) *Auth {
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salt := CreateSalt()
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hash := CreateHash(ident, pass, salt)
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auth := &Auth{}
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auth.Ident = ident
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auth.Salt = salt
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auth.Hash = hash
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return auth
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}
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func CreateSalt() []byte {
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const saltSize = 16
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randBytes := make([]byte, saltSize)
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rand.Read(randBytes)
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return randBytes
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}
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func CreateHash(ident, pass, salt []byte) []byte {
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vec := make([]byte, 0, len(ident) + len(salt) + len(pass))
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vec = append(vec, ident...)
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vec = append(vec, salt...)
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vec = append(vec, pass...)
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hasher := sha256.New()
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hash := hasher.Sum(vec)
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return hash
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}
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func CheckHash(ident, pass, reqSalt, reqHash []byte) bool {
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localHash := CreateHash(ident, pass, reqSalt)
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return bytes.Equal(reqHash, localHash)
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}
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