dtoro
c7d7ee287c
Self-hosted HTML artifact publisher. Single Go binary, SQLite metadata, HTML on disk. Features: password-protected artifacts, per-artifact expiration, admin dashboard with view metrics (privacy-preserving daily-salt visitor hash, sparklines, 30-day SVG chart, top referrers), rate-limited unlock endpoint. Packaged as a Docker image (two-stage, CGO_ENABLED=0, pure-Go SQLite). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
package auth
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import (
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"crypto/hmac"
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"crypto/sha256"
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"encoding/base64"
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"net/http"
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"strconv"
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"strings"
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"time"
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"golang.org/x/crypto/bcrypt"
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)
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const unlockLifetime = 24 * time.Hour
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type Artifact struct {
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secret []byte
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secure bool
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}
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func NewArtifact(secretHex string, secure bool) *Artifact {
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return &Artifact{secret: []byte(secretHex), secure: secure}
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}
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func HashPassword(p string) (string, error) {
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b, err := bcrypt.GenerateFromPassword([]byte(p), bcrypt.DefaultCost)
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return string(b), err
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}
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func VerifyPassword(hash, p string) bool {
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return bcrypt.CompareHashAndPassword([]byte(hash), []byte(p)) == nil
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}
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func unlockCookieName(slug string) string {
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return "artifacto_unlock_" + slug
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}
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func (a *Artifact) Issue(slug string) string {
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issued := strconv.FormatInt(time.Now().Unix(), 10)
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return issued + "." + a.sign(slug+"|"+issued)
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}
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func (a *Artifact) SetCookie(w http.ResponseWriter, slug string) {
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http.SetCookie(w, &http.Cookie{
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Name: unlockCookieName(slug),
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Value: a.Issue(slug),
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Path: "/p/" + slug,
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HttpOnly: true,
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Secure: a.secure,
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SameSite: http.SameSiteLaxMode,
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Expires: time.Now().Add(unlockLifetime),
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})
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}
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func (a *Artifact) Verify(r *http.Request, slug string) bool {
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c, err := r.Cookie(unlockCookieName(slug))
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if err != nil {
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return false
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}
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parts := strings.SplitN(c.Value, ".", 2)
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if len(parts) != 2 {
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return false
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}
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issued, err := strconv.ParseInt(parts[0], 10, 64)
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if err != nil {
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return false
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}
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if time.Since(time.Unix(issued, 0)) > unlockLifetime {
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return false
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}
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expected := a.sign(slug + "|" + parts[0])
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return hmac.Equal([]byte(expected), []byte(parts[1]))
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}
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func (a *Artifact) sign(s string) string {
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m := hmac.New(sha256.New, a.secret)
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m.Write([]byte(s))
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return base64.RawURLEncoding.EncodeToString(m.Sum(nil))
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}
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