public static void main(String[] args) throws Exception {
        final byte[] data = Array.readFile(Constants.FILE_NAME);
        final Charset charset = Charset.forName("UTF-16LE");
        final CharsetEncoder encoder = charset.newEncoder();
        final byte[] encData =
            encoder.encode(CharBuffer.wrap(new String(data))).array();
        final byte[] cmsBase = Array.readFile(Constants.CMS_FILE_NAME);
        //декодирование из base64 в der
        final Decoder decoder = new Decoder();
        final byte[] cmsDer =
            decoder.decodeBuffer(new ByteArrayInputStream(cmsBase));
        final CertificateFactory cf = CertificateFactory.getInstance("X509");
        final Certificate cert =
            cf.generateCertificate(new FileInputStream(Constants.CERT_FILE_NAME));
        final PublicKey pub = cert.getPublicKey();
        //var 1
        final Signature s = Signature.getInstance(JCP.CRYPTOPRO_SIGN_NAME,
            JCP.PROVIDER_NAME);
        s.initVerify(pub);
        s.update(encData);
        final boolean verifies = s.verify(cmsDer);
        System.out.println("signature verifies: " + verifies);
        if(!verifies) {
            throw new Exception("Signature was not verified");
        }

        ////  verify();
    }

            final Attribute[] signAttrElem = info.signedAttrs.elements;
 //проверка аттрибута message-digest
           final Asn1ObjectIdentifier messageDigestOid = new Asn1ObjectIdentifier(
           (new OID(STR_CMS_OID_DIGEST_ATTR)).value);

            Attribute messageDigestAttr = null;

            for(int r = 0; r < signAttrElem.length; r++) {
                final Asn1ObjectIdentifier oid = signAttrElem[r].type;
                if(oid.equals(messageDigestOid)) {
                    messageDigestAttr = signAttrElem[r];
                }
            }

            if(messageDigestAttr == null)
                throw new Exception("message-digest attribute not present");

            final Asn1Type open = messageDigestAttr.values.elements[0];
            final Asn1OctetString hash = (Asn1OctetString)open;
            final byte[] md = hash.value;

            //вычисление messageDigest
            final byte[] dm = digestm(text, DIGEST_ALG_NAME);

            if(!Array.toHexString(dm).equals(Array.toHexString(md)))
                throw new Exception("message-digest attribute verify failed");