public class JCPProvider{


public MyProvider() throws Exception {
        addProvider("ru.CryptoPro.JCP.JCP");
        addProvider("ru.CryptoPro.reprov.RevCheck");

        CAdESUtility.initJCPAlgorithms();
        JCPXMLDSigInit.init();

        System.setProperty("com.sun.security.enableCRLDP", "true");
        System.setProperty("com.ibm.security.enableCRLDP", "true");
        System.setProperty("ru.CryptoPro.reprov.enableAIAcaIssuers", "true");
    }

public String decrypt(byte[] content, X509Certificate cert, PrivateKey privateKey) throws Exception {
        EnvelopedSignature signature = new EnvelopedSignature(new ByteArrayInputStream(content));
        signature.addKeyAgreeRecipient();
        ByteArrayOutputStream decryptedByteDataStream = new ByteArrayOutputStream();
        signature.decrypt(cert, privateKey, decryptedByteDataStream);
        byte[] decryptedData = decryptedByteDataStream.toByteArray();
        decryptedByteDataStream.flush();
        decryptedByteDataStream.close();
        return new String(decryptedData);
}
}

Caused by: ru.CryptoPro.CAdES.exception.EnvelopedException: Input cipher initiation failed
	at ru.CryptoPro.CAdES.pc_1.pc_1.cl_0.<init>(Unknown Source)
	at ru.CryptoPro.CAdES.pc_1.pc_1.cl_1.getRecipientOperator(Unknown Source)
	at org.bouncycastle.cms.KeyTransRecipientInformation.getRecipientOperator(Unknown Source)
	at org.bouncycastle.cms.RecipientInformation.getContentStream(Unknown Source)
	at org.bouncycastle.cms.RecipientInformation.getContent(Unknown Source)
	... 118 common frames omitted
Caused by: java.security.NoSuchProviderException: No such provider: Crypto
	at java.base/javax.crypto.Cipher.getInstance(Cipher.java:622)
	... 123 common frames omitted