43 lines
924 B
Go
43 lines
924 B
Go
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package models
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import (
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"crypto/rand"
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"crypto/sha256"
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"encoding/base32"
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"time"
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)
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const (
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ScopeAuthentication = "authentication"
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)
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// Token is the type for authentication tokens
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type Token struct {
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PlainText string `json:"token"`
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UserID int64 `json:"-"`
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Hash []byte `json:"-"`
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Expiry time.Time `json:"expiry"`
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Scope string `json:"-"`
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}
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// GenerateToken Generates a token that lasts for ttl, and returns it
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func GenerateToken(userID int, ttl time.Duration, scope string) (*Token, error) {
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token := &Token{
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UserID: int64(userID),
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Expiry: time.Now().Add(ttl),
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Scope: scope,
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}
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randomBytes := make([]byte, 16)
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_, err := rand.Read(randomBytes)
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if err != nil {
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return nil, err
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}
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token.PlainText = base32.StdEncoding.WithPadding((base32.NoPadding)).
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EncodeToString((randomBytes))
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hash := sha256.Sum256([]byte(token.PlainText))
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token.Hash = hash[:]
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return token, nil
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}
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