77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
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package main
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import (
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"crypto/hmac"
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"crypto/rand"
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"crypto/sha256"
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"encoding/hex"
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"errors"
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log "github.com/sirupsen/logrus"
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"golang.org/x/crypto/scrypt"
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)
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type User struct {
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Username string `json:"username"`
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Salt string `json:"salt"`
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Passwd string `json:"passwd"`
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}
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func NewUser(name, passwd string) (*User, error) {
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log.WithFields(log.Fields{"name": name}).Debugf("starting")
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defer log.WithFields(log.Fields{"name": name}).Debugf("done")
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for _, v := range cfg.Admin.Users {
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if v.Username == name {
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err := errors.New("user already exists")
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log.WithFields(log.Fields{"name": name, "error": err}).Errorf("")
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return nil, err
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}
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}
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u := &User{
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Username: name,
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}
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salt := make([]byte, 32)
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if _, err := rand.Read(salt); err != nil {
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log.WithFields(log.Fields{"name": name, "call": "rand.Read", "error": err}).Errorf("")
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return nil, err
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}
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u.Salt = hex.EncodeToString(salt)
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if pass, err := u.HashPassword(passwd); err != nil {
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log.WithFields(log.Fields{"name": name, "call": "HashPassword", "error": err}).Errorf("")
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return nil, err
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} else {
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u.Passwd = hex.EncodeToString(pass)
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}
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return u, nil
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}
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func (u *User) HashPassword(passwd string) ([]byte, error) {
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log.WithFields(log.Fields{}).Debugf("starting")
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defer log.WithFields(log.Fields{}).Debugf("done")
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//peppering the pass
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hash := hmac.New(sha256.New, []byte(cfg.Admin.Secrets.PasswordPepper))
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hash.Write([]byte(passwd))
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hashPass := hash.Sum(nil)
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//salting the hash
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salt := make([]byte, 32)
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if _, err := hex.Decode(salt, []byte(u.Salt)); err != nil {
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log.WithFields(log.Fields{"call": "hex.Decode", "error": err}).Errorf("")
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return nil, err
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}
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if h, err := scrypt.Key(hashPass, salt, cfg.Admin.Secrets.ScryptN, cfg.Admin.Secrets.ScryptR, cfg.Admin.Secrets.ScryptP, 32); err != nil {
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log.WithFields(log.Fields{"call": "scrypt.Key", "error": err}).Errorf("")
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return h, err
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} else {
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return h, nil
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}
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}
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