emissary/internal/auth/thirdparty/jwt.go
William Petit 7d551a8312
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feat(auth): accept clock skew for token validation
2023-04-01 19:30:45 +02:00

63 lines
1.4 KiB
Go

package thirdparty
import (
"context"
"time"
"forge.cadoles.com/Cadoles/emissary/internal/jwk"
"github.com/lestrrat-go/jwx/v2/jwa"
"github.com/lestrrat-go/jwx/v2/jws"
"github.com/lestrrat-go/jwx/v2/jwt"
"github.com/pkg/errors"
)
const keyRole = "role"
func parseToken(ctx context.Context, keys jwk.Set, issuer string, rawToken string, acceptableSkew time.Duration) (jwt.Token, error) {
token, err := jwt.Parse(
[]byte(rawToken),
jwt.WithKeySet(keys, jws.WithRequireKid(false)),
jwt.WithIssuer(issuer),
jwt.WithValidate(true),
jwt.WithAcceptableSkew(acceptableSkew),
)
if err != nil {
return nil, errors.WithStack(err)
}
return token, nil
}
func GenerateToken(ctx context.Context, key jwk.Key, issuer, subject string, role Role) (string, error) {
token := jwt.New()
if err := token.Set(jwt.SubjectKey, subject); err != nil {
return "", errors.WithStack(err)
}
if err := token.Set(jwt.IssuerKey, issuer); err != nil {
return "", errors.WithStack(err)
}
if err := token.Set(keyRole, role); err != nil {
return "", errors.WithStack(err)
}
now := time.Now().UTC()
if err := token.Set(jwt.NotBeforeKey, now); err != nil {
return "", errors.WithStack(err)
}
if err := token.Set(jwt.IssuedAtKey, now); err != nil {
return "", errors.WithStack(err)
}
rawToken, err := jwt.Sign(token, jwt.WithKey(jwa.RS256, key))
if err != nil {
return "", errors.WithStack(err)
}
return string(rawToken), nil
}