com.amazonaws.services.s3.internal.crypto.v2

Class S3CryptoModuleBase<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

java.lang.Object

com.amazonaws.services.s3.internal.crypto.v2.S3CryptoModule<T>

com.amazonaws.services.s3.internal.crypto.v2.S3CryptoModuleBase<T>

Direct Known Subclasses:

S3CryptoModuleAE

public abstract class S3CryptoModuleBase<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>
extends S3CryptoModule<T>

Common implementation for different S3 cryptographic modules.

Field Summary

Fields

Modifier and Type	Field and Description
protected ContentCryptoScheme	contentCryptoScheme
protected CryptoConfigurationV2	cryptoConfig A read-only copy of the crypto configuration.
protected static int	DEFAULT_BUFFER_SIZE
protected EncryptionMaterialsProvider	kekMaterialsProvider
protected AWSKMS	kms
protected org.apache.commons.logging.Log	log
protected Map<String,T>	multipartUploadContexts Map of data about in progress encrypted multipart uploads.
protected S3Direct	s3

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	S3CryptoModuleBase(AWSKMS kms, S3Direct s3, EncryptionMaterialsProvider kekMaterialsProvider, CryptoConfigurationV2 cryptoConfig)

Method Summary

Modifier and Type	Method and Description
void	abortMultipartUploadSecurely(AbortMultipartUploadRequest req)
protected abstract long	ciphertextLength(long plaintextLength) Returns the length of the ciphertext computed from the length of the plaintext.
CompleteMultipartUploadResult	completeMultipartUploadSecurely(CompleteMultipartUploadRequest req)
CopyPartResult	copyPartSecurely(CopyPartRequest copyPartRequest)
protected com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial	createContentCryptoMaterial(AmazonWebServiceRequest req) Creates and returns a non-null content crypto material for the given request.
protected PutObjectRequest	createInstructionPutRequest(String bucketName, String key, com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial cekMaterial)
protected SecretKey	generateCEK(EncryptionMaterials kekMaterials)
CryptoConfigurationV2	getCryptoConfiguration()
EncryptionMaterialsProvider	getEncryptionMaterialsProvider()
InitiateMultipartUploadResult	initiateMultipartUploadSecurely(InitiateMultipartUploadRequest req)
protected CipherLiteInputStream	newMultipartS3CipherInputStream(UploadPartRequest req, CipherLite cipherLite)
protected long	plaintextLength(AbstractPutObjectRequest request, ObjectMetadata metadata) Returns the plaintext length from the request and metadata; or -1 if unknown.
PutObjectResult	putInstructionFileSecurely(PutInstructionFileRequest req)
void	putLocalObjectSecurely(UploadObjectRequest reqIn, String uploadId, OutputStream os)
PutObjectResult	putObjectSecurely(PutObjectRequest req)
protected void	securityCheck(com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial cekMaterial, S3ObjectId objectId, boolean isRangeGet) Checks if the the crypto scheme used in the given content crypto material is allowed to be used in this crypto module.
protected PutObjectRequest	updateInstructionPutRequest(PutObjectRequest req, com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial cekMaterial) Updates put request to store the specified instruction object in S3.
protected ObjectMetadata	updateMetadataWithContentCryptoMaterial(ObjectMetadata metadata, File file, com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial instruction)
UploadPartResult	uploadPartSecurely(UploadPartRequest req)
protected <R extends AbstractPutObjectRequest> R	wrapWithCipher(R request, com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial cekMaterial) Returns the given PutObjectRequest but has the content as input stream wrapped with a cipher, and configured with some meta data and user metadata.

Methods inherited from class com.amazonaws.services.s3.internal.crypto.v2.S3CryptoModule

getObjectSecurely, getObjectSecurely

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_BUFFER_SIZE

protected static final int DEFAULT_BUFFER_SIZE

See Also:

Constant Field Values

kekMaterialsProvider

protected final EncryptionMaterialsProvider kekMaterialsProvider

log

protected final org.apache.commons.logging.Log log

contentCryptoScheme

protected final ContentCryptoScheme contentCryptoScheme

cryptoConfig

protected final CryptoConfigurationV2 cryptoConfig

A read-only copy of the crypto configuration.

multipartUploadContexts

protected final Map<String,T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext> multipartUploadContexts

Map of data about in progress encrypted multipart uploads.

s3

protected final S3Direct s3

kms

protected final AWSKMS kms

Constructor Detail

S3CryptoModuleBase

protected S3CryptoModuleBase(AWSKMS kms,
                             S3Direct s3,
                             EncryptionMaterialsProvider kekMaterialsProvider,
                             CryptoConfigurationV2 cryptoConfig)

Parameters:

cryptoConfig - a read-only copy of the crypto configuration.

Method Detail

ciphertextLength

protected abstract long ciphertextLength(long plaintextLength)

Returns the length of the ciphertext computed from the length of the plaintext.

Parameters:

plaintextLength - a non-negative number

Returns:

a non-negative number

getCryptoConfiguration

public CryptoConfigurationV2 getCryptoConfiguration()

Specified by:

getCryptoConfiguration in class S3CryptoModule<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

getEncryptionMaterialsProvider

public EncryptionMaterialsProvider getEncryptionMaterialsProvider()

Specified by:

getEncryptionMaterialsProvider in class S3CryptoModule<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

putObjectSecurely

public PutObjectResult putObjectSecurely(PutObjectRequest req)

Specified by:

putObjectSecurely in class S3CryptoModule<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

abortMultipartUploadSecurely

public final void abortMultipartUploadSecurely(AbortMultipartUploadRequest req)

Specified by:

abortMultipartUploadSecurely in class S3CryptoModule<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

copyPartSecurely

public final CopyPartResult copyPartSecurely(CopyPartRequest copyPartRequest)

Specified by:

copyPartSecurely in class S3CryptoModule<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

initiateMultipartUploadSecurely

public InitiateMultipartUploadResult initiateMultipartUploadSecurely(InitiateMultipartUploadRequest req)

Specified by:

initiateMultipartUploadSecurely in class S3CryptoModule<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

uploadPartSecurely

public UploadPartResult uploadPartSecurely(UploadPartRequest req)

NOTE: Because the encryption process requires context from previous blocks, parts uploaded with the AmazonS3EncryptionClient (as opposed to the normal AmazonS3Client) must be uploaded serially, and in order. Otherwise, the previous encryption context isn't available to use when encrypting the current part.

Specified by:

uploadPartSecurely in class S3CryptoModule<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

newMultipartS3CipherInputStream

protected final CipherLiteInputStream newMultipartS3CipherInputStream(UploadPartRequest req,
                                                                      CipherLite cipherLite)

completeMultipartUploadSecurely

public CompleteMultipartUploadResult completeMultipartUploadSecurely(CompleteMultipartUploadRequest req)

Specified by:

completeMultipartUploadSecurely in class S3CryptoModule<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

updateMetadataWithContentCryptoMaterial

protected final ObjectMetadata updateMetadataWithContentCryptoMaterial(ObjectMetadata metadata,
                                                                       File file,
                                                                       com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial instruction)

createContentCryptoMaterial

protected final com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial createContentCryptoMaterial(AmazonWebServiceRequest req)

Creates and returns a non-null content crypto material for the given request.

Throws:

SdkClientException - if no encryption material can be found.

putLocalObjectSecurely

public final void putLocalObjectSecurely(UploadObjectRequest reqIn,
                                         String uploadId,
                                         OutputStream os)
                                  throws IOException

Specified by:

putLocalObjectSecurely in class S3CryptoModule<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

uploadId - multipart upload id

os - output stream which will be closed upon method completion.

Throws:

IOException

generateCEK

protected final SecretKey generateCEK(EncryptionMaterials kekMaterials)

Parameters:

kekMaterials - non-null encryption materials

wrapWithCipher

protected final <R extends AbstractPutObjectRequest> R wrapWithCipher(R request,
                                                                      com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial cekMaterial)

Returns the given PutObjectRequest but has the content as input stream wrapped with a cipher, and configured with some meta data and user metadata.

plaintextLength

protected final long plaintextLength(AbstractPutObjectRequest request,
                                     ObjectMetadata metadata)

Returns the plaintext length from the request and metadata; or -1 if unknown.

updateInstructionPutRequest

protected final PutObjectRequest updateInstructionPutRequest(PutObjectRequest req,
                                                             com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial cekMaterial)

Updates put request to store the specified instruction object in S3.

Parameters:

req - The put-instruction-file request for the instruction file to be stored in S3.

cekMaterial - The instruction object to be stored in S3.

Returns:

A put request to store the specified instruction object in S3.

createInstructionPutRequest

protected final PutObjectRequest createInstructionPutRequest(String bucketName,
                                                             String key,
                                                             com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial cekMaterial)

securityCheck

protected void securityCheck(com.amazonaws.services.s3.internal.crypto.v2.ContentCryptoMaterial cekMaterial,
                             S3ObjectId objectId,
                             boolean isRangeGet)

Checks if the the crypto scheme used in the given content crypto material is allowed to be used in this crypto module. Default is no-op. Subclass may override.

Throws:

SecurityException - if the crypto scheme used in the given content crypto material is not allowed in this crypto module.

putInstructionFileSecurely

public final PutObjectResult putInstructionFileSecurely(PutInstructionFileRequest req)

Specified by:

putInstructionFileSecurely in class S3CryptoModule<T extends com.amazonaws.services.s3.internal.crypto.v2.MultipartUploadCryptoContext>

Returns:

the result of putting the instruction file in S3; or null if the specified S3 object doesn't exist. The S3 object can be subsequently retrieved using the new instruction file via the usual get operation by specifying a EncryptedGetObjectRequest.