juliaandClaude Sonnet 4.6
1b381d9385
Add bcrypt user file auth, JWT middleware on all write routes, Pinia authStore with localStorage persistence, login view with redirect support, and v-if guards on all CRUD controls and admin nav link. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
package auth
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import (
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"bufio"
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"errors"
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"os"
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"strings"
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"time"
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"github.com/golang-jwt/jwt/v5"
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"golang.org/x/crypto/bcrypt"
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)
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// Claims is the JWT payload.
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type Claims struct {
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Username string `json:"username"`
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jwt.RegisteredClaims
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}
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// LoadUsers reads username:bcrypt_hash pairs from path.
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// Lines starting with '#' and blank lines are ignored.
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func LoadUsers(path string) (map[string]string, error) {
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f, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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users := make(map[string]string)
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scanner := bufio.NewScanner(f)
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for scanner.Scan() {
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line := strings.TrimSpace(scanner.Text())
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if line == "" || strings.HasPrefix(line, "#") {
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continue
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}
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parts := strings.SplitN(line, ":", 2)
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if len(parts) != 2 {
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continue
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}
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users[parts[0]] = parts[1]
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}
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return users, scanner.Err()
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}
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// VerifyPassword checks username+password against the bcrypt hash stored for that user.
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// The peppered input is "username:password".
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func VerifyPassword(users map[string]string, username, password string) bool {
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hash, ok := users[username]
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if !ok {
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return false
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}
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return bcrypt.CompareHashAndPassword([]byte(hash), []byte(username+":"+password)) == nil
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}
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// GenerateJWT creates a signed HS256 token for username, valid for 1 hour.
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func GenerateJWT(username, secret string) (string, error) {
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claims := Claims{
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Username: username,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Hour)),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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},
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}
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return jwt.NewWithClaims(jwt.SigningMethodHS256, claims).SignedString([]byte(secret))
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}
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// ValidateJWT parses and verifies token, returning its claims.
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func ValidateJWT(tokenStr, secret string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenStr, &Claims{}, func(t *jwt.Token) (any, error) {
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if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, errors.New("unexpected signing method")
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}
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return []byte(secret), nil
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})
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if err != nil {
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return nil, err
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}
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claims, ok := token.Claims.(*Claims)
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if !ok || !token.Valid {
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return nil, errors.New("invalid token")
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}
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return claims, nil
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}
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