forked from wrenn/wrenn
114 lines
3.6 KiB
Go
114 lines
3.6 KiB
Go
package auth
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import (
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"fmt"
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"time"
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"github.com/golang-jwt/jwt/v5"
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"github.com/jackc/pgx/v5/pgtype"
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"git.omukk.dev/wrenn/wrenn/pkg/id"
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)
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const jwtExpiry = 6 * time.Hour
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const hostJWTExpiry = 7 * 24 * time.Hour // 7 days; host refreshes via refresh token
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const HostRefreshTokenExpiry = 60 * 24 * time.Hour // 60 days; exported for service layer
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// Claims are the JWT payload for user tokens.
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type Claims struct {
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Type string `json:"typ,omitempty"` // empty for user tokens; used to reject host tokens
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TeamID string `json:"team_id"`
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Role string `json:"role"` // owner, admin, or member within TeamID
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Email string `json:"email"`
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Name string `json:"name"`
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IsAdmin bool `json:"is_admin,omitempty"` // platform-level admin flag
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jwt.RegisteredClaims
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}
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// SignJWT signs a new 6-hour JWT for the given user.
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func SignJWT(secret []byte, userID, teamID pgtype.UUID, email, name, role string, isAdmin bool) (string, error) {
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now := time.Now()
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claims := Claims{
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TeamID: id.FormatTeamID(teamID),
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Role: role,
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Email: email,
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Name: name,
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IsAdmin: isAdmin,
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RegisteredClaims: jwt.RegisteredClaims{
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Subject: id.FormatUserID(userID),
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IssuedAt: jwt.NewNumericDate(now),
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ExpiresAt: jwt.NewNumericDate(now.Add(jwtExpiry)),
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString(secret)
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}
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// VerifyJWT parses and validates a user JWT, returning the claims on success.
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// Rejects host JWTs (which carry a "typ" claim) to prevent cross-token confusion.
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func VerifyJWT(secret []byte, tokenStr 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, fmt.Errorf("unexpected signing method: %v", t.Header["alg"])
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}
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return secret, nil
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})
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if err != nil {
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return Claims{}, fmt.Errorf("invalid token: %w", err)
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}
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c, ok := token.Claims.(*Claims)
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if !ok || !token.Valid {
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return Claims{}, fmt.Errorf("invalid token claims")
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}
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if c.Type == "host" {
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return Claims{}, fmt.Errorf("invalid token: host token cannot be used as user token")
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}
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return *c, nil
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}
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// HostClaims are the JWT payload for host agent tokens.
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type HostClaims struct {
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Type string `json:"typ"` // always "host"
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HostID string `json:"host_id"`
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jwt.RegisteredClaims
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}
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// SignHostJWT signs a long-lived (7-day) JWT for a registered host agent.
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func SignHostJWT(secret []byte, hostID pgtype.UUID) (string, error) {
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formatted := id.FormatHostID(hostID)
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now := time.Now()
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claims := HostClaims{
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Type: "host",
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HostID: formatted,
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RegisteredClaims: jwt.RegisteredClaims{
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Subject: formatted,
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IssuedAt: jwt.NewNumericDate(now),
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ExpiresAt: jwt.NewNumericDate(now.Add(hostJWTExpiry)),
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString(secret)
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}
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// VerifyHostJWT parses and validates a host JWT, returning the claims on success.
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// It rejects user JWTs by checking the "typ" claim.
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func VerifyHostJWT(secret []byte, tokenStr string) (HostClaims, error) {
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token, err := jwt.ParseWithClaims(tokenStr, &HostClaims{}, func(t *jwt.Token) (any, error) {
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if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", t.Header["alg"])
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}
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return secret, nil
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})
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if err != nil {
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return HostClaims{}, fmt.Errorf("invalid token: %w", err)
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}
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c, ok := token.Claims.(*HostClaims)
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if !ok || !token.Valid {
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return HostClaims{}, fmt.Errorf("invalid token claims")
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}
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if c.Type != "host" {
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return HostClaims{}, fmt.Errorf("invalid token type: expected host")
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}
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return *c, nil
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}
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