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/*
* Copyright (c) 2012-2019 Snowflake Computing Inc. All rights reserved.
*/
package net.snowflake.client.jdbc.cloud.storage;
import com.amazonaws.util.Base64;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.microsoft.azure.storage.blob.BlobProperties;
import com.microsoft.azure.storage.blob.CloudBlob;
import com.microsoft.azure.storage.blob.CloudBlockBlob;
import net.snowflake.client.core.ObjectMapperFactory;
import net.snowflake.client.core.SFSession;
import net.snowflake.client.jdbc.ErrorCode;
import net.snowflake.client.jdbc.FileBackedOutputStream;
import net.snowflake.client.jdbc.SnowflakeFileTransferAgent;
import net.snowflake.client.jdbc.SnowflakeSQLException;
import com.microsoft.azure.storage.StorageCredentials;
import com.microsoft.azure.storage.StorageCredentialsAnonymous;
import com.microsoft.azure.storage.StorageCredentialsSharedAccessSignature;
import com.microsoft.azure.storage.StorageException;
import com.microsoft.azure.storage.blob.CloudBlobClient;
import com.microsoft.azure.storage.blob.CloudBlobContainer;
import com.microsoft.azure.storage.blob.ListBlobItem;
import net.snowflake.client.jdbc.SnowflakeUtil;
import net.snowflake.client.log.SFLogger;
import net.snowflake.client.log.SFLoggerFactory;
import net.snowflake.client.util.SFPair;
import net.snowflake.common.core.RemoteStoreFileEncryptionMaterial;
import net.snowflake.common.core.SqlState;
import org.apache.commons.io.IOUtils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.SocketTimeoutException;
import java.net.URI;
import java.net.URISyntaxException;
import java.security.InvalidKeyException;
import java.util.AbstractMap;
import java.util.AbstractMap.SimpleEntry;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import net.snowflake.client.jdbc.MatDesc;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
/**
* Encapsulates the Azure Storage client
* and all Azure Storage operations and logic
*
* @author lgiakoumakis
*/
public class SnowflakeAzureClient implements SnowflakeStorageClient
{
private final static String localFileSep = System.getProperty("file.separator");
private final static String AZ_ENCRYPTIONDATAPROP = "encryptiondata";
private int encryptionKeySize = 0; // used for PUTs
private StageInfo stageInfo;
private RemoteStoreFileEncryptionMaterial encMat;
private CloudBlobClient azStorageClient;
private final static SFLogger logger =
SFLoggerFactory.getLogger(SnowflakeS3Client.class);
private SnowflakeAzureClient()
{
}
;
/*
* Factory method for a SnowflakeAzureClient object
* @param stage The stage information that the client will operate on
* @param encMat The encryption material
* required to decrypt/encrypt content in stage
*/
public static SnowflakeAzureClient createSnowflakeAzureClient(StageInfo stage,
RemoteStoreFileEncryptionMaterial encMat)
throws SnowflakeSQLException
{
SnowflakeAzureClient azureClient = new SnowflakeAzureClient();
azureClient.setupAzureClient(stage, encMat);
return azureClient;
}
/*
* Initializes the Azure client
* This method is used during the object contruction, but also to
* reset/recreate the encapsulated CloudBlobClient object with new
* credentials (after SAS token expiration)
* @param stage The stage information that the client will operate on
* @param encMat The encryption material
* required to decrypt/encrypt content in stage
* @throws IllegalArgumentException when invalid credentials are used
*/
private void setupAzureClient(StageInfo stage, RemoteStoreFileEncryptionMaterial encMat)
throws IllegalArgumentException, SnowflakeSQLException
{
// Save the client creation parameters so that we can reuse them,
// to reset the Azure client.
this.stageInfo = stage;
this.encMat = encMat;
logger.debug("Setting up the Azure client ");
try
{
URI storageEndpoint = buildAzureStorageEndpointURI(stage.getEndPoint(), stage.getStorageAccount());
StorageCredentials azCreds;
String sasToken = (String) stage.getCredentials().get("AZURE_SAS_TOKEN");
if (sasToken != null)
{
// We are authenticated with a shared access token.
azCreds = new StorageCredentialsSharedAccessSignature(sasToken);
}
else
{
// Use anonymous authentication.
azCreds = StorageCredentialsAnonymous.ANONYMOUS;
}
if (encMat != null)
{
byte[] decodedKey = Base64.decode(encMat.getQueryStageMasterKey());
encryptionKeySize = decodedKey.length * 8;
if (encryptionKeySize != 128 &&
encryptionKeySize != 192 &&
encryptionKeySize != 256)
{
throw new SnowflakeSQLException(SqlState.INTERNAL_ERROR,
ErrorCode.INTERNAL_ERROR.getMessageCode(),
"unsupported key size", encryptionKeySize);
}
}
this.azStorageClient = new CloudBlobClient(storageEndpoint, azCreds);
}
catch (URISyntaxException ex)
{
throw new IllegalArgumentException("invalid_azure_credentials");
}
}
// Reurns the Max number of retry attempts
@Override
public int getMaxRetries()
{
return 25;
}
// Returns the max exponent for multiplying backoff with the power of 2, the value
// of 4 will give us 16secs as the max number of time to sleep before retry
@Override
public int getRetryBackoffMaxExponent()
{
return 4;
}
// Returns the min number of milliseconds to sleep before retry
@Override
public int getRetryBackoffMin()
{
return 1000;
}
/**
* @return Returns true if encryption is enabled
*/
public boolean isEncrypting()
{
return encryptionKeySize > 0;
}
/**
* @return Returns the size of the encryption key
*/
@Override
public int getEncryptionKeySize()
{
return encryptionKeySize;
}
/**
* Re-creates the encapsulated storage client with a fresh access token
*
* @param stageCredentials a Map (as returned by GS) which contains the new credential properties
* @throws SnowflakeSQLException failure to renew the client
**/
@Override
public void renew(Map stageCredentials) throws SnowflakeSQLException
{
stageInfo.setCredentials(stageCredentials);
setupAzureClient(stageInfo, encMat);
}
/**
* shuts down the client
*/
@Override
public void shutdown()
{ /* Not available */ }
/**
* For a set of remote storage objects under a remote location and a given prefix/path
* returns their properties wrapped in ObjectSummary objects
*
* @param remoteStorageLocation location, i.e. container for Azure
* @param prefix the prefix/path to list under
* @return a collection of storage summary objects
* @throws StorageProviderException Azure storage exception
*/
@Override
public StorageObjectSummaryCollection listObjects(String remoteStorageLocation, String prefix)
throws StorageProviderException
{
StorageObjectSummaryCollection storageObjectSummaries;
try
{
CloudBlobContainer container = azStorageClient.getContainerReference(remoteStorageLocation);
Iterable listBlobItemIterable = container.listBlobs(
prefix, // List the BLOBs under this prefix
true // List the BLOBs as a flat list, i.e. do not list directories
);
storageObjectSummaries = new StorageObjectSummaryCollection(listBlobItemIterable);
}
catch (URISyntaxException | StorageException ex)
{
logger.debug("Failed to list objects: {}", ex);
throw new StorageProviderException(ex);
}
return storageObjectSummaries;
}
/**
* Returns the metadata properties for a remote storage object
*
* @param remoteStorageLocation location, i.e. bucket for S3
* @param prefix the prefix/path of the object to retrieve
* @return storage metadata object
* @throws StorageProviderException azure storage exception
*/
@Override
public StorageObjectMetadata getObjectMetadata(String remoteStorageLocation, String prefix)
throws StorageProviderException
{
AzureObjectMetadata azureObjectMetadata = null;
try
{
// Get a reference to the BLOB, to retrieve its metadata
CloudBlobContainer container = azStorageClient.getContainerReference(remoteStorageLocation);
CloudBlob blob = container.getBlockBlobReference(prefix);
blob.downloadAttributes();
// Get the user-defined BLOB metadata
Map userDefinedMetadata = blob.getMetadata();
// Get the BLOB system properties we care about
BlobProperties properties = blob.getProperties();
long contentLength = properties.getLength();
String contentEncoding = properties.getContentEncoding();
// Construct an Azure metadata object
azureObjectMetadata = new AzureObjectMetadata(contentLength, contentEncoding, userDefinedMetadata);
}
catch (StorageException ex)
{
logger.debug("Failed to retrieve BLOB metadata: {} - {}", ex.getErrorCode(),
ex.getExtendedErrorInformation());
throw new StorageProviderException(ex);
}
catch (URISyntaxException ex)
{
logger.debug("Cannot retrieve BLOB properties, invalid URI: {}", ex);
throw new StorageProviderException(ex);
}
return azureObjectMetadata;
}
/**
* Download a file from remote storage.
*
* @param connection connection object
* @param command command to download file
* @param localLocation local file path
* @param destFileName destination file name
* @param parallelism [ not used by the Azure implementation ]
* @param remoteStorageLocation remote storage location, i.e. bucket for S3
* @param stageFilePath stage file path
* @param stageRegion region name where the stage persists
* @throws SnowflakeSQLException download failure
**/
@Override
public void download(SFSession connection, String command, String localLocation, String destFileName,
int parallelism, String remoteStorageLocation, String stageFilePath, String stageRegion)
throws SnowflakeSQLException
{
int retryCount = 0;
do
{
try
{
String localFilePath = localLocation + localFileSep + destFileName;
File localFile = new File(localFilePath);
CloudBlobContainer container = azStorageClient.getContainerReference(remoteStorageLocation);
CloudBlob blob = container.getBlockBlobReference(stageFilePath);
// Note that Azure doesn't offer a multi-part parallel download library,
// where the user has control of block size and parallelism
// we rely on Azure to handle the download, hence the "parallelism" parameter is ignored
// in the Azure implementation of the method
blob.downloadToFile(localFilePath);
// Pull object metadata from Azure
blob.downloadAttributes();
// Get the user-defined BLOB metadata
Map userDefinedMetadata = blob.getMetadata();
AbstractMap.SimpleEntry encryptionData =
parseEncryptionData(userDefinedMetadata.get(AZ_ENCRYPTIONDATAPROP));
String key = encryptionData.getKey();
String iv = encryptionData.getValue();
if (this.isEncrypting() && this.getEncryptionKeySize() <= 256)
{
if (key == null || iv == null)
{
throw new SnowflakeSQLException(SqlState.INTERNAL_ERROR,
ErrorCode.INTERNAL_ERROR.getMessageCode(),
"File metadata incomplete");
}
// Decrypt file
try
{
EncryptionProvider.decrypt(localFile, key, iv, this.encMat);
}
catch (Exception ex)
{
logger.error("Error decrypting file", ex);
throw ex;
}
}
return;
}
catch (Exception ex)
{
logger.debug("Download unsuccessful {}", ex);
handleAzureException(ex, ++retryCount, "download", connection, command, this);
}
}
while (retryCount <= getMaxRetries());
throw new SnowflakeSQLException(SqlState.INTERNAL_ERROR,
ErrorCode.INTERNAL_ERROR.getMessageCode(),
"Unexpected: download unsuccessful without exception!");
}
/**
* Download a file from remote storage
*
* @param connection connection object
* @param command command to download file
* @param parallelism number of threads for parallel downloading
* @param remoteStorageLocation remote storage location, i.e. bucket for s3
* @param stageFilePath stage file path
* @param stageRegion region name where the stage persists
* @return input file stream
* @throws SnowflakeSQLException when download failure
*/
@Override
public InputStream downloadToStream(SFSession connection, String command, int parallelism,
String remoteStorageLocation, String stageFilePath,
String stageRegion) throws SnowflakeSQLException
{
int retryCount = 0;
do
{
try
{
CloudBlobContainer container = azStorageClient.getContainerReference(remoteStorageLocation);
CloudBlob blob = container.getBlockBlobReference(stageFilePath);
InputStream stream = blob.openInputStream();
Map userDefinedMetadata = blob.getMetadata();
AbstractMap.SimpleEntry encryptionData =
parseEncryptionData(userDefinedMetadata.get(AZ_ENCRYPTIONDATAPROP));
String key = encryptionData.getKey();
String iv = encryptionData.getValue();
if (this.isEncrypting() && this.getEncryptionKeySize() <= 256)
{
if (key == null || iv == null)
{
throw new SnowflakeSQLException(SqlState.INTERNAL_ERROR,
ErrorCode.INTERNAL_ERROR.getMessageCode(),
"File metadata incomplete");
}
try
{
return EncryptionProvider.decryptStream(stream, key, iv, encMat);
}
catch (Exception ex)
{
logger.error("Error in decrypting file", ex);
throw ex;
}
}
else
{
return stream;
}
}
catch (Exception ex)
{
logger.debug("Downloading unsuccessful {}", ex);
handleAzureException(ex, ++retryCount, "download", connection, command
, this);
}
}
while (retryCount < getMaxRetries());
throw new SnowflakeSQLException(SqlState.INTERNAL_ERROR,
ErrorCode.INTERNAL_ERROR.getMessageCode(),
"Unexpected: download unsuccessful without exception!");
}
/**
* Upload a file/stream to remote storage
*
* @param connection connection object
* @param command upload command
* @param parallelism [ not used by the Azure implementation ]
* @param uploadFromStream true if upload source is stream
* @param remoteStorageLocation storage container name
* @param srcFile source file if not uploading from a stream
* @param destFileName file name on remote storage after upload
* @param inputStream stream used for uploading if fileBackedOutputStream is null
* @param fileBackedOutputStream stream used for uploading if not null
* @param meta object meta data
* @param stageRegion region name where the stage persists
* @throws SnowflakeSQLException if upload failed even after retry
*/
@Override
public void upload(SFSession connection, String command, int parallelism, boolean uploadFromStream,
String remoteStorageLocation, File srcFile, String destFileName, InputStream inputStream,
FileBackedOutputStream fileBackedOutputStream, StorageObjectMetadata meta, String stageRegion)
throws SnowflakeSQLException
{
final List toClose = new ArrayList<>();
long originalContentLength = meta.getContentLength();
SFPair uploadStreamInfo = createUploadStream(
srcFile, uploadFromStream, inputStream, meta, originalContentLength,
fileBackedOutputStream, toClose);
if (!(meta instanceof AzureObjectMetadata))
{
throw new IllegalArgumentException("Unexpected metadata object type");
}
int retryCount = 0;
do
{
try
{
logger.debug("Starting upload");
InputStream fileInputStream = uploadStreamInfo.left;
CloudBlobContainer container = azStorageClient.getContainerReference(remoteStorageLocation);
CloudBlockBlob blob = container.getBlockBlobReference(destFileName);
// Set the user-defined/Snowflake metadata and upload the BLOB
blob.setMetadata((HashMap) meta.getUserMetadata());
// Note that Azure doesn't offer a multi-part parallel upload library,
// where the user has control of block size and parallelism
// we rely on Azure to handle the upload, hence the "parallelism" parameter is ignored
// in the Azure implementation of the method
blob.upload(fileInputStream, // input stream to upload from
-1 // -1 indicates an unknown stream length
);
logger.debug("Upload successful");
blob.uploadMetadata();
// close any open streams in the "toClose" list and return
for (FileInputStream is : toClose)
IOUtils.closeQuietly(is);
return;
}
catch (Exception ex)
{
handleAzureException(ex, ++retryCount, "upload", connection, command, this);
if (uploadFromStream && fileBackedOutputStream == null)
{
throw new SnowflakeSQLException(ex, SqlState.SYSTEM_ERROR,
ErrorCode.IO_ERROR.getMessageCode(),
"Encountered exception during upload: " +
ex.getMessage() + "\nCannot retry upload from stream.");
}
uploadStreamInfo = createUploadStream(srcFile, uploadFromStream,
inputStream, meta, originalContentLength,
fileBackedOutputStream, toClose);
}
}
while (retryCount <= getMaxRetries());
for (FileInputStream is : toClose)
IOUtils.closeQuietly(is);
throw new SnowflakeSQLException(SqlState.INTERNAL_ERROR,
ErrorCode.INTERNAL_ERROR.getMessageCode(),
"Unexpected: upload unsuccessful without exception!");
}
/**
* Handles exceptions thrown by Azure Storage
*
* @param ex the exception to handle
* @param retryCount current number of retries, incremented by the caller before each call
* @param operation string that indicates the function/operation that was taking place,
* when the exception was raised, for example "upload"
* @param connection the current SFSession object used by the client
* @param command the command attempted at the time of the exception
* @throws SnowflakeSQLException exceptions not handled
*/
@Override
public void handleStorageException(Exception ex, int retryCount, String operation, SFSession connection, String command)
throws SnowflakeSQLException
{
handleAzureException(ex, retryCount, operation, connection, command, this);
}
private SFPair createUploadStream(
File srcFile,
boolean uploadFromStream,
InputStream inputStream,
StorageObjectMetadata meta,
long originalContentLength,
FileBackedOutputStream fileBackedOutputStream,
List toClose)
throws SnowflakeSQLException
{
logger.debug(
"createUploadStream({}, {}, {}, {}, {}, {})",
this, srcFile, uploadFromStream, inputStream, fileBackedOutputStream, toClose);
final InputStream stream;
FileInputStream srcFileStream = null;
try
{
if (isEncrypting() && getEncryptionKeySize() < 256)
{
try
{
final InputStream uploadStream = uploadFromStream ?
(fileBackedOutputStream != null ?
fileBackedOutputStream.asByteSource().openStream() :
inputStream) :
(srcFileStream = new FileInputStream(srcFile));
toClose.add(srcFileStream);
// Encrypt
stream = EncryptionProvider.encrypt(meta, originalContentLength,
uploadStream, this.encMat, this);
uploadFromStream = true;
}
catch (Exception ex)
{
logger.error("Failed to encrypt input", ex);
throw new SnowflakeSQLException(ex, SqlState.INTERNAL_ERROR,
ErrorCode.INTERNAL_ERROR.getMessageCode(),
"Failed to encrypt input", ex.getMessage());
}
}
else
{
if (uploadFromStream)
{
if (fileBackedOutputStream != null)
{
stream = fileBackedOutputStream.asByteSource().openStream();
}
else
{
stream = inputStream;
}
}
else
{
srcFileStream = new FileInputStream(srcFile);
toClose.add(srcFileStream);
stream = srcFileStream;
}
}
}
catch (FileNotFoundException ex)
{
logger.error("Failed to open input file", ex);
throw new SnowflakeSQLException(ex, SqlState.INTERNAL_ERROR,
ErrorCode.INTERNAL_ERROR.getMessageCode(),
"Failed to open input file", ex.getMessage());
}
catch (IOException ex)
{
logger.error("Failed to open input stream", ex);
throw new SnowflakeSQLException(ex, SqlState.INTERNAL_ERROR,
ErrorCode.INTERNAL_ERROR.getMessageCode(),
"Failed to open input stream", ex.getMessage());
}
return SFPair.of(stream, uploadFromStream);
}
/**
* Handles exceptions thrown by Azure Storage
* It will retry transient errors as defined by the Azure Client retry policy
* It will re-create the client if the SAS token has expired, and re-try
*
* @param ex the exception to handle
* @param retryCount current number of retries, incremented by the caller before each call
* @param operation string that indicates the function/operation that was taking place,
* when the exception was raised, for example "upload"
* @param connection the current SFSession object used by the client
* @param command the command attempted at the time of the exception
* @param azClient the current Snowflake Azure client object
* @throws SnowflakeSQLException exceptions not handled
*/
private static void handleAzureException(
Exception ex,
int retryCount,
String operation,
SFSession connection,
String command,
SnowflakeAzureClient azClient)
throws SnowflakeSQLException
{
// no need to retry if it is invalid key exception
if (ex.getCause() instanceof InvalidKeyException)
{
// Most likely cause is that the unlimited strength policy files are not installed
// Log the error and throw a message that explains the cause
SnowflakeFileTransferAgent.throwJCEMissingError(operation, ex);
}
if (((StorageException) ex).getHttpStatusCode() == 403)
{
// A 403 indicates that the SAS token has expired,
// we need to refresh the Azure client with the new token
SnowflakeFileTransferAgent.renewExpiredToken(connection, command, azClient);
}
if (ex instanceof StorageException)
{
StorageException se = (StorageException) ex;
// If we have exceeded the max number of retries, propagate the error
if (retryCount > azClient.getMaxRetries())
{
throw new SnowflakeSQLException(se, SqlState.SYSTEM_ERROR,
ErrorCode.AZURE_SERVICE_ERROR.getMessageCode(),
operation,
se.getErrorCode(),
se.getExtendedErrorInformation(),
se.getHttpStatusCode(),
se.getMessage());
}
else
{
logger.debug("Encountered exception ({}) during {}, retry count: {}",
ex.getMessage(), operation, retryCount);
logger.debug("Stack trace: ", ex);
// exponential backoff up to a limit
int backoffInMillis = azClient.getRetryBackoffMin();
if (retryCount > 1)
{
backoffInMillis <<= (Math.min(retryCount - 1,
azClient.getRetryBackoffMaxExponent()));
}
try
{
logger.debug("Sleep for {} milliseconds before retry", backoffInMillis);
Thread.sleep(backoffInMillis);
}
catch (InterruptedException ex1)
{
// ignore
}
if (se.getHttpStatusCode() == 403)
{
// A 403 indicates that the SAS token has expired,
// we need to refresh the Azure client with the new token
SnowflakeFileTransferAgent.renewExpiredToken(connection, command, azClient);
}
}
}
else
{
if (ex instanceof InterruptedException ||
SnowflakeUtil.getRootCause(ex) instanceof SocketTimeoutException)
{
if (retryCount > azClient.getMaxRetries())
{
throw new SnowflakeSQLException(ex, SqlState.SYSTEM_ERROR,
ErrorCode.IO_ERROR.getMessageCode(),
"Encountered exception during " + operation + ": " +
ex.getMessage());
}
else
{
logger.debug("Encountered exception ({}) during {}, retry count: {}",
ex.getMessage(), operation, retryCount);
}
}
else
{
throw new SnowflakeSQLException(ex, SqlState.SYSTEM_ERROR,
ErrorCode.IO_ERROR.getMessageCode(),
"Encountered exception during " + operation + ": " +
ex.getMessage());
}
}
}
/*
* Builds a URI to a Azure Storage account endpoint
*
* @param storageEndPoint the storage endpoint name
* @param storageAccount the storage account name
*/
private static URI buildAzureStorageEndpointURI(String storageEndPoint, String storageAccount)
throws URISyntaxException
{
URI storageEndpoint = new URI(
"https", storageAccount + "." + storageEndPoint + "/",
null, null);
return storageEndpoint;
}
/*
* buildEncryptionMetadataJSON
* Takes the base64-encoded iv and key and creates the JSON block to be
* used as the encryptiondata metadata field on the blob.
*/
private String buildEncryptionMetadataJSON(String iv64, String key64)
{
return String.format("{\"EncryptionMode\":\"FullBlob\",\"WrappedContentKey\""
+ ":{\"KeyId\":\"symmKey1\",\"EncryptedKey\":\"%s\""
+ ",\"Algorithm\":\"AES_CBC_256\"},\"EncryptionAgent\":"
+ "{\"Protocol\":\"1.0\",\"EncryptionAlgorithm\":"
+ "\"AES_CBC_256\"},\"ContentEncryptionIV\":\"%s\""
+ ",\"KeyWrappingMetadata\":{\"EncryptionLibrary\":"
+ "\"Java 5.3.0\"}}", key64, iv64);
}
/*
* parseEncryptionData
* Takes the json string in the encryptiondata metadata field of the encrypted
* blob and parses out the key and iv. Returns the pair as key = key, iv = value.
*/
private SimpleEntry parseEncryptionData(String jsonEncryptionData)
throws SnowflakeSQLException
{
ObjectMapper mapper = ObjectMapperFactory.getObjectMapper();
JsonFactory factory = mapper.getJsonFactory();
try
{
JsonParser parser = factory.createJsonParser(jsonEncryptionData);
JsonNode encryptionDataNode = mapper.readTree(parser);
String iv = encryptionDataNode.get("ContentEncryptionIV").asText();
String key = encryptionDataNode.get("WrappedContentKey").get("EncryptedKey").asText();
return new SimpleEntry(key, iv);
}
catch (Exception ex)
{
throw new SnowflakeSQLException(ex, SqlState.SYSTEM_ERROR,
ErrorCode.IO_ERROR.getMessageCode(),
"Error parsing encryption data as json" + ": " +
ex.getMessage());
}
}
/**
* Returns the material descriptor key
*/
@Override
public String getMatdescKey()
{
return "matdesc";
}
/**
* Adds encryption metadata to the StorageObjectMetadata object
*/
@Override
public void addEncryptionMetadata(StorageObjectMetadata meta,
MatDesc matDesc,
byte[] ivData,
byte[] encKeK,
long contentLength)
{
meta.addUserMetadata(getMatdescKey(),
matDesc.toString());
meta.addUserMetadata(AZ_ENCRYPTIONDATAPROP, buildEncryptionMetadataJSON(
Base64.encodeAsString(ivData),
Base64.encodeAsString(encKeK))
);
meta.setContentLength(contentLength);
}
/**
* Adds digest metadata to the StorageObjectMetadata object
*/
@Override
public void addDigestMetadata(StorageObjectMetadata meta, String digest)
{
if (!SnowflakeUtil.isBlank(digest))
{
// Azure doesn't allow hyphens in the name of a metadata field.
meta.addUserMetadata("sfcdigest", digest);
}
}
/**
* Gets digest metadata to the StorageObjectMetadata object
*/
@Override
public String getDigestMetadata(StorageObjectMetadata meta)
{
return meta.getUserMetadata().get("sfcdigest");
}
}
