yarnom
f0b50d13ea
Add Go/Postgres admin APIs, Angular admin UI, manual build flow, asset uploads, markdown import/export, configurable slug generation, and the Yar reading theme. Exclude local docs and generated development artifacts from version control.
75 lines
1.7 KiB
Go
75 lines
1.7 KiB
Go
package admin
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import (
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"crypto/rand"
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"crypto/sha256"
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"encoding/base64"
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"encoding/hex"
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"errors"
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"fmt"
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"net/http"
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"time"
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"github.com/gin-gonic/gin"
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"golang.org/x/crypto/bcrypt"
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)
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const SessionCookieName = "osaet_admin_session"
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var ErrInvalidCredentials = errors.New("invalid username or password")
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type contextKey string
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const userContextKey contextKey = "adminUser"
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func HashPassword(password string) (string, error) {
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if password == "" {
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return "", errors.New("password is required")
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}
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hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
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if err != nil {
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return "", fmt.Errorf("hash password: %w", err)
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}
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return string(hash), nil
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}
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func CheckPassword(hash string, password string) bool {
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return bcrypt.CompareHashAndPassword([]byte(hash), []byte(password)) == nil
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}
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func NewSessionToken() (string, error) {
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token := make([]byte, 32)
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if _, err := rand.Read(token); err != nil {
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return "", fmt.Errorf("generate session token: %w", err)
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}
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return base64.RawURLEncoding.EncodeToString(token), nil
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}
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func SessionTokenHash(token string) string {
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sum := sha256.Sum256([]byte(token))
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return hex.EncodeToString(sum[:])
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}
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func SetSessionCookie(c *gin.Context, token string, expiresAt time.Time) {
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http.SetCookie(c.Writer, &http.Cookie{
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Name: SessionCookieName,
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Value: token,
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Path: "/",
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Expires: expiresAt,
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MaxAge: int(time.Until(expiresAt).Seconds()),
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HttpOnly: true,
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SameSite: http.SameSiteLaxMode,
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})
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}
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func ClearSessionCookie(c *gin.Context) {
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http.SetCookie(c.Writer, &http.Cookie{
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Name: SessionCookieName,
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Value: "",
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Path: "/",
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Expires: time.Unix(0, 0),
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MaxAge: -1,
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HttpOnly: true,
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SameSite: http.SameSiteLaxMode,
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})
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}
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