how to resolve Exception in thread "main" com.amazonaws.AmazonClientException: Unable to build cipher: Illegal key size using aws s3

I am trying for encryption and decryption using amazon aws. I got exception like

Exception in thread "main" com.amazonaws.AmazonClientException: Unable to build cipher: Illegal key size
Make sure you have the JCE unlimited strength policy files installed and configured for your JVM
    at com.amazonaws.services.s3.internal.crypto.ContentCryptoScheme.createCipherLite(ContentCryptoScheme.java:190)
    at com.amazonaws.services.s3.internal.crypto.ContentCryptoMaterial.wrap(ContentCryptoMaterial.java:823)
    at com.amazonaws.services.s3.internal.crypto.S3CryptoModuleBase.buildContentCryptoMaterial(S3CryptoModuleBase.java:535)
    at com.amazonaws.services.s3.internal.crypto.S3CryptoModuleBase.newContentCryptoMaterial(S3CryptoModuleBase.java:483)
    at com.amazonaws.services.s3.internal.crypto.S3CryptoModuleBase.createContentCryptoMaterial(S3CryptoModuleBase.java:449)
    at com.amazonaws.services.s3.internal.crypto.S3CryptoModuleBase.putObjectUsingMetadata(S3CryptoModuleBase.java:165)
    at com.amazonaws.services.s3.internal.crypto.S3CryptoModuleBase.putObjectSecurely(S3CryptoModuleBase.java:159)
    at com.amazonaws.services.s3.internal.crypto.CryptoModuleDispatcher.putObjectSecurely(CryptoModuleDispatcher.java:107)
    at com.amazonaws.services.s3.AmazonS3EncryptionClient.putObject(AmazonS3EncryptionClient.java:485)
    at testKMSkeyUploadObject.main(testKMSkeyUploadObject.java:91)
Caused by: java.security.InvalidKeyException: Illegal key size
    at javax.crypto.Cipher.checkCryptoPerm(Cipher.java:1039)
    at javax.crypto.Cipher.implInit(Cipher.java:805)
    at javax.crypto.Cipher.chooseProvider(Cipher.java:864)
    at javax.crypto.Cipher.init(Cipher.java:1396)
    at javax.crypto.Cipher.init(Cipher.java:1327)
    at com.amazonaws.services.s3.internal.crypto.ContentCryptoScheme.createCipherLite(ContentCryptoScheme.java:187)
    ... 9 more

please help me.

when I was trying to put object for doing encryption using AmazonS3EncryptionClient I am getting exception. How to resolve this error.

AmazonS3EncryptionClient s3 = new AmazonS3EncryptionClient(credentials,materialProvider);

        PutObjectRequest putRequest = new PutObjectRequest(
                bucket, kms_cmk_id, new ByteArrayInputStream(plaintext), metadata);

        ObjectMetadata objectMetadata = new ObjectMetadata();
        objectMetadata.setSSEAlgorithm(ObjectMetadata.AES_256_SERVER_SIDE_ENCRYPTION);   

        putRequest.setMetadata(objectMetadata);



         System.out.println(putRequest.getKey());
        s3.putObject(putRequest); //getting exception here