signDocument(doc) {
      this.setLoading(true);
      const reader = new FileReader();
      return this.$axios
          .get(this.uri.downloadFiledocument(doc.id), {responseType: "blob"})
          .then((value) => {
            if (!this.cert) {
              this.setLoading(false)
              return
            }
            let thumbprint = this.cert.thumbprint;
            let _this = this
            let result;
            return new Promise((resolve) => {
              reader.readAsArrayBuffer(value.data);
              reader.onload = async function () {
                try {
                  let messageHash = await createHash(reader.result);
                  console.log('сертификат', thumbprint );
                  result = await createDetachedSignature(thumbprint, messageHash);
                  let resultBlob = new Blob([result], {
                    type: "blob",
                  });
                  let formData = new FormData();
                  console.log('сама подпись', result);
                  formData.append("file", resultBlob, doc.name.substr(0, doc.name.lastIndexOf('.')) + '.sgn')
                  const responseBinary = await _this.requestUploadBinaryFiles(formData)
                  _this.$axios.get(`/signature/${responseBinary.data}.p7s`, { responseType: 'blob' } ).then(({ data }) => {
                    saveFile(data, 'backSignature')
                  })
                  resolve({signatureId: responseBinary.data, fileId: doc.id})
                  _this.setLoading(false);
                  return responseBinary
                } catch (e) {
                  _this.signError = true;
                  _this.signErrorMessage = e.message;
                  _this.setLoading(false);
                }
              };
            })
          });
    }

.get(this.uri.downloadFiledocument(doc.id), {responseType: "blob"})

let messageHash = await createHash(reader.result);