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Fix int64 overflow in newNumericDateFromSeconds #112

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merged 1 commit into from Oct 27, 2021
Merged

Fix int64 overflow in newNumericDateFromSeconds #112

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4 changes: 3 additions & 1 deletion types.go
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Expand Up @@ -3,6 +3,7 @@ package jwt
import (
"encoding/json"
"fmt"
"math"
"reflect"
"strconv"
"time"
Expand Down Expand Up @@ -41,7 +42,8 @@ func NewNumericDate(t time.Time) *NumericDate {
// newNumericDateFromSeconds creates a new *NumericDate out of a float64 representing a
// UNIX epoch with the float fraction representing non-integer seconds.
func newNumericDateFromSeconds(f float64) *NumericDate {
return NewNumericDate(time.Unix(0, int64(f*float64(time.Second))))
round, frac := math.Modf(f)
return NewNumericDate(time.Unix(int64(round), int64(frac*1e9)))
}

// MarshalJSON is an implementation of the json.RawMessage interface and serializes the UNIX epoch
Expand Down