sha1 file

 var reader = new FileReader();
                    reader.onload = (e) => {
                            var hash =  CryptoJS.SHA1(this.arrayBufferToWordArray(e.target.result)).toString();

                    }
reader.readAsArrayBuffer(this.profile_file);

arrayBufferToWordArray:function(ab) {
            var i8a = new Uint8Array(ab);
            var a = [];
            for (var i = 0; i < i8a.length; i += 4) {
            a.push(i8a[i] << 24 | i8a[i + 1] << 16 | i8a[i + 2] << 8 | i8a[i + 3]);
            }
            return CryptoJS.lib.WordArray.create(a, i8a.length);
        },