mirror of
https://github.com/Luzifer/twitch-bot.git
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89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
package main
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import (
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"crypto/rand"
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"encoding/base64"
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"fmt"
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"net/http"
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"strings"
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"github.com/gofrs/uuid/v3"
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"github.com/pkg/errors"
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"golang.org/x/crypto/argon2"
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)
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const (
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// OWASP recommendations - 2023-07-07
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// https://cheatsheetseries.owasp.org/cheatsheets/Password_Storage_Cheat_Sheet.html
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argonFmt = "$argon2id$v=%d$m=%d,t=%d,p=%d$%s$%s"
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argonHashLen = 16
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argonMemory = 46 * 1024
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argonSaltLength = 8
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argonThreads = 1
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argonTime = 1
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)
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func fillAuthToken(token *configAuthToken) error {
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token.Token = uuid.Must(uuid.NewV4()).String()
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salt := make([]byte, argonSaltLength)
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if _, err := rand.Read(salt); err != nil {
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return errors.Wrap(err, "reading salt")
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}
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token.Hash = fmt.Sprintf(
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argonFmt,
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argon2.Version,
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argonMemory, argonTime, argonThreads,
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base64.RawStdEncoding.EncodeToString(salt),
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base64.RawStdEncoding.EncodeToString(argon2.IDKey([]byte(token.Token), salt, argonTime, argonMemory, argonThreads, argonHashLen)),
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)
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return nil
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}
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func writeAuthMiddleware(h http.Handler, module string) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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_, pass, hasBasicAuth := r.BasicAuth()
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var token string
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switch {
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case hasBasicAuth && pass != "":
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token = pass
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case r.Header.Get("Authorization") != "":
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var (
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tokenType string
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hadPrefix bool
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)
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tokenType, token, hadPrefix = strings.Cut(r.Header.Get("Authorization"), " ")
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switch {
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case !hadPrefix:
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// Legacy: Accept `Authorization: tokenhere`
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token = tokenType
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case strings.EqualFold(tokenType, "token"):
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// This is perfect: `Authorization: Token tokenhere`
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default:
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// That was unexpected: `Authorization: Bearer tokenhere` or similar
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http.Error(w, "invalid token type", http.StatusForbidden)
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return
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}
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default:
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http.Error(w, "auth not successful", http.StatusForbidden)
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return
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}
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err := authService.ValidateTokenFor(token, module)
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if err != nil {
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http.Error(w, "auth not successful", http.StatusForbidden)
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return
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}
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h.ServeHTTP(w, r)
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})
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}
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