Caused by: java.security.NoSuchProviderException: JCE cannot authenticate the provider JCSP
	at java.base/javax.crypto.JceSecurity.getInstance(JceSecurity.java:137)
	at java.base/javax.crypto.KeyGenerator.getInstance(KeyGenerator.java:286)
	... 91 common frames omitted
Caused by: java.util.jar.JarException: jar:nested:.../cryptopro-proxy.jar/!BOOT-INF/lib/JCSP-5.0.4.jar!/ has unsigned entries - META-INF/services/java.security.Provider
	at java.base/javax.crypto.JarVerifier.verifySingleJar(JarVerifier.java:466)
	at java.base/javax.crypto.JarVerifier.verifyJars(JarVerifier.java:319)
	at java.base/javax.crypto.JarVerifier.verify(JarVerifier.java:263)
	at java.base/javax.crypto.ProviderVerifier.verify(ProviderVerifier.java:130)
	at java.base/javax.crypto.JceSecurity.verifyProvider(JceSecurity.java:196)
	at java.base/javax.crypto.JceSecurity$2.apply(JceSecurity.java:222)
	at java.base/javax.crypto.JceSecurity$2.apply(JceSecurity.java:211)
	at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
	at java.base/javax.crypto.JceSecurity.getVerificationResult(JceSecurity.java:211)
	at java.base/javax.crypto.JceSecurity.getInstance(JceSecurity.java:134)
	... 92 common frames omitted

        System.setProperty("disable_default_context", "true");
        Security.addProvider(new JCP());
        Security.addProvider(new JCSP());
        Security.addProvider(new CryptoProvider());
        Security.addProvider(new RevCheck());
        Security.addProvider(new Provider());
        cpSSLConfig.setDefaultSSLProvider(JCSP.PROVIDER_NAME);

KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance("GostX509");
        keyManagerFactory.init(clientKeyStore, new char[]{});

        SSLContext sslContext = SSLContext.getInstance("GostTLSv1.2");
        //временное решение для тестирования
        sslContext.init(keyManagerFactory.getKeyManagers(), new TrustManager[]{new X509TrustManager() {
            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }

            public void checkClientTrusted(X509Certificate[] certs, String authType) {
            }

            public void checkServerTrusted(X509Certificate[] certs, String authType) {
            }
        }}, null);

        HttpsURLConnection conn = null;
        URL url1 = new URL(url);
        conn = (HttpsURLConnection) url1.openConnection();

        conn.setReadTimeout(5000);
        conn.setConnectTimeout(5000);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/octet-stream");
        conn.setDoOutput(true);
        conn.setDoInput(true);

        conn.setSSLSocketFactory(sslContext.getSocketFactory());

        conn.getOutputStream().write(data);
        conn.connect();

<build>
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <executable>true</executable>
                </configuration>
            </plugin>
        </plugins>
    </build>