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parse.go
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/
parse.go
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package token
import (
"context"
"fmt"
"strconv"
"strings"
"github.com/dgrijalva/jwt-go"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
"github.com/gopherty/wings/common/conf"
)
// var
var (
AccessKeyFunc = keyAcFunc
RefreshKeyFunc = keyRfFunc
errMissingMetadata = status.Errorf(codes.InvalidArgument, "missing metadata")
errInvalidToken = status.Errorf(codes.Unauthenticated, "invaild token")
)
// ExtractTokenMetadata .
func ExtractTokenMetadata(ts string, keyFunc jwt.Keyfunc) (id uint64, err error) {
token, err := jwt.Parse(ts, keyFunc)
if err != nil {
return
}
claims, ok := token.Claims.(jwt.MapClaims)
if !ok || !token.Valid {
err = status.Errorf(codes.InvalidArgument, "token invaild")
return
}
return strconv.ParseUint(fmt.Sprintf("%.f", claims["user_id"]), 10, 64)
}
// ValidToken .
func ValidToken(ctx context.Context, keyFunc jwt.Keyfunc) error {
token, err := VerifyToken(ctx, keyFunc)
if err != nil {
return err
}
if _, ok := token.Claims.(jwt.Claims); !ok && !token.Valid {
return errInvalidToken
}
return nil
}
// VerifyToken .
func VerifyToken(ctx context.Context, keyFunc jwt.Keyfunc) (token *jwt.Token, err error) {
ts, err := ExtractToken(ctx)
if err != nil {
return
}
token, err = jwt.Parse(ts, keyFunc)
if err != nil {
err = errInvalidToken
return
}
return
}
// ExtractToken extract token from context
func ExtractToken(ctx context.Context) (string, error) {
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
return "", errMissingMetadata
}
authorization := md.Get("Authorization")
if len(authorization) < 1 {
return "", errInvalidToken
}
return strings.TrimPrefix(authorization[0], "Bearer "), nil
}
// access token keyFunc
func keyAcFunc(t *jwt.Token) (interface{}, error) {
if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
return nil, status.Errorf(codes.Unauthenticated, "sign alg method not match %v", t.Header["alg"])
}
return []byte(conf.Instance().Secret.Access), nil
}
// refresh token keyFunc
func keyRfFunc(t *jwt.Token) (interface{}, error) {
if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
return nil, status.Errorf(codes.Unauthenticated, "sign alg method not match %v", t.Header["alg"])
}
return []byte(conf.Instance().Secret.Refresh), nil
}