在Java AWS SDK中解密数据密钥会产生乱码

$ aws kms generate-data-key --key-id 64a62e3e-7e38-4f86-8ef2-3d00929e6260 --key-spec AES_256
{
   "Plaintext": "+SjeaxtD5TIhOcY16+A2NA493MbxnYozbzZx4i3/BfA=", 
   "KeyId": "arn:aws:kms:us-west-2:040512153658:key/64a62e3e-7e38-4f86-8ef2-3d00929e6260", 
   "CiphertextBlob": "AQIDAHgrvfqfgn9D0tTUJOISzFCz7ejMPZ6/HGX0kGAlzKYZ7wEiyHdpuGaOjpq4UQazPAgeAAAAfjB8BgkqhkiG9w0BBwagbzBtAgEAMGgGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMU5JtbI6lxLOv/p4KAgEQgDsX97Pk+ywqLU2VymLRgDSz0exOyzRgLMgd7WEf3sLUh4GnbYllIrxNSdK/DSZrYUhBo78KYugnkTj89g=="
}

然后,我通过从CLI解密来验证它:

$ aws kms decrypt --ciphertext-blob fileb://<(echo 'AQIDAHgrvfqfgn9D0tTUJOISzFCz7ejMPZ6/HGX0kGAlzKYZ7wEiyHdpuGaOjpq4UQazPAgeAAAAfjB8BgkqhkiG9w0BBwagbzBtAgEAMGgGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMU5JtbI6lxLOv/p4KAgEQgDsX97Pk+ywqLU2VymLRgDSz0exOyzRgLMgd7WEf3sLUh4GnbYllIrxNSdK/DSZrYUhBo78KYugnkTj89g==' | base64 -d) --query Plaintext
"+SjeaxtD5TIhOcY16+A2NA493MbxnYozbzZx4i3/BfA="

瞧!我把明文值恢复得很好很干净。然后,我尝试使用Java通过SDK磨出相同的密文blob,代码如下:

    .
    .
    .
    final String encryptedCipherText = "AQIDAHgrvfqfgn9D0tTUJOISzFCz7ejMPZ6/HGX0kGAlzKYZ7wEiyHdpuGaOjpq4UQazPAgeAAAAfjB8BgkqhkiG9w0BBwagbzBtAgEAMGgGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMU5JtbI6lxLOv/p4KAgEQgDsX97Pk+ywqLU2VymLRgDSz0exOyzRgLMgd7WEf3sLUh4GnbYllIrxNSdK/DSZrYUhBo78KYugnkTj89g==";
    final String expectedPlainText = "+SjeaxtD5TIhOcY16+A2NA493MbxnYozbzZx4i3/BfA=";

    AWSKMS kmsClient;
    String returnValue;

    kmsClient = AWSKMSClientBuilder
            .standard()
            .withRegion("us-west-2")
            .build();

    ByteBuffer cipherTextBlob = ByteBuffer.wrap(Base64.getDecoder().decode(encryptedCipherText));
    DecryptRequest decryptRequest = new DecryptRequest().withCiphertextBlob(cipherTextBlob);
    ByteBuffer key = kmsClient.decrypt(decryptRequest).getPlaintext();
    final byte[] bytes = new byte[key.remaining()];
    key.duplicate().get(bytes);
    String result = new String(bytes);
    if (expectedPlainText.equals(result)) {
        LOG.info("decrypted plaintext matches expected");
    } else {
        LOG.error("decrypted plaintext unexpected value: " + result);
    }
    .
    .
    .

转储的日志条目是:

23:08:33.210 [main] ERROR com.eyefinity.magicmissile.aws.AwsClientConfig - decrypted plaintext unexpected value: �(�k�2!9�5��64=���3o6q�-��