com.amazonaws.services.s3.internal.crypto

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

java.lang.Object

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

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

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

Common implementation for different S3 cryptographic modules.

Field Summary

Fields

Modifier and Type	Field and Description
protected com.amazonaws.services.s3.internal.crypto.ContentCryptoScheme	contentCryptoScheme
protected CryptoConfiguration	cryptoConfig A read-only copy of the crypto configuration.
protected com.amazonaws.services.s3.internal.crypto.S3CryptoScheme	cryptoScheme
protected static int	DEFAULT_BUFFER_SIZE
protected EncryptionMaterialsProvider	kekMaterialsProvider
protected AWSKMSClient	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(AWSKMSClient kms, S3Direct s3, com.amazonaws.auth.AWSCredentialsProvider credentialsProvider, EncryptionMaterialsProvider kekMaterialsProvider, CryptoConfiguration cryptoConfig)
protected	S3CryptoModuleBase(S3Direct s3, com.amazonaws.auth.AWSCredentialsProvider credentialsProvider, EncryptionMaterialsProvider kekMaterialsProvider, CryptoConfiguration cryptoConfig) For testing purposes only.

Method Summary

Methods

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.ContentCryptoMaterial	createContentCryptoMaterial(com.amazonaws.AmazonWebServiceRequest req)
protected PutObjectRequest	createInstructionPutRequest(String bucketName, String key, com.amazonaws.services.s3.internal.crypto.ContentCryptoMaterial cekMaterial)
protected SecretKey	generateCEK(EncryptionMaterials kekMaterials, Provider providerIn)
com.amazonaws.services.s3.internal.crypto.S3CryptoScheme	getS3CryptoScheme()
InitiateMultipartUploadResult	initiateMultipartUploadSecurely(InitiateMultipartUploadRequest req)
protected CipherLiteInputStream	newMultipartS3CipherInputStream(UploadPartRequest req, com.amazonaws.services.s3.internal.crypto.CipherLite cipherLite)
protected long	plaintextLength(PutObjectRequest request, ObjectMetadata metadata) Returns the plaintext length from the request and metadata; or -1 if unknown.
PutObjectResult	putInstructionFileSecurely(PutInstructionFileRequest req)
PutObjectResult	putObjectSecurely(PutObjectRequest req)
protected void	securityCheck(com.amazonaws.services.s3.internal.crypto.ContentCryptoMaterial cekMaterial, com.amazonaws.services.s3.internal.crypto.S3ObjectWrapper retrieved) 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.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.ContentCryptoMaterial instruction)
UploadPartResult	uploadPartSecurely(UploadPartRequest req)
protected PutObjectRequest	wrapWithCipher(PutObjectRequest request, com.amazonaws.services.s3.internal.crypto.ContentCryptoMaterial cekMaterial) Returns a request that 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.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

cryptoScheme

protected final com.amazonaws.services.s3.internal.crypto.S3CryptoScheme cryptoScheme

contentCryptoScheme

protected final com.amazonaws.services.s3.internal.crypto.ContentCryptoScheme contentCryptoScheme

cryptoConfig

protected final CryptoConfiguration cryptoConfig

A read-only copy of the crypto configuration.

multipartUploadContexts

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

Map of data about in progress encrypted multipart uploads.

s3

protected final S3Direct s3

kms

protected final AWSKMSClient kms

Constructor Detail

S3CryptoModuleBase

protected S3CryptoModuleBase(AWSKMSClient kms,
                  S3Direct s3,
                  com.amazonaws.auth.AWSCredentialsProvider credentialsProvider,
                  EncryptionMaterialsProvider kekMaterialsProvider,
                  CryptoConfiguration cryptoConfig)

Parameters:

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

S3CryptoModuleBase

protected S3CryptoModuleBase(S3Direct s3,
                  com.amazonaws.auth.AWSCredentialsProvider credentialsProvider,
                  EncryptionMaterialsProvider kekMaterialsProvider,
                  CryptoConfiguration cryptoConfig)

For testing purposes only.

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

putObjectSecurely

public PutObjectResult putObjectSecurely(PutObjectRequest req)

Specified by:

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

Returns:

the result of the putting the S3 object.

abortMultipartUploadSecurely

public final void abortMultipartUploadSecurely(AbortMultipartUploadRequest req)

Specified by:

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

copyPartSecurely

public final CopyPartResult copyPartSecurely(CopyPartRequest copyPartRequest)

Specified by:

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

initiateMultipartUploadSecurely

public InitiateMultipartUploadResult initiateMultipartUploadSecurely(InitiateMultipartUploadRequest req)

Specified by:

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

newMultipartS3CipherInputStream

protected final CipherLiteInputStream newMultipartS3CipherInputStream(UploadPartRequest req,
                                                    com.amazonaws.services.s3.internal.crypto.CipherLite cipherLite)

completeMultipartUploadSecurely

public CompleteMultipartUploadResult completeMultipartUploadSecurely(CompleteMultipartUploadRequest req)

Specified by:

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

updateMetadataWithContentCryptoMaterial

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

createContentCryptoMaterial

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

generateCEK

protected final SecretKey generateCEK(EncryptionMaterials kekMaterials,
                    Provider providerIn)

wrapWithCipher

protected final PutObjectRequest wrapWithCipher(PutObjectRequest request,
                              com.amazonaws.services.s3.internal.crypto.ContentCryptoMaterial cekMaterial)

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

plaintextLength

protected final long plaintextLength(PutObjectRequest request,
                   ObjectMetadata metadata)

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

getS3CryptoScheme

public final com.amazonaws.services.s3.internal.crypto.S3CryptoScheme getS3CryptoScheme()

updateInstructionPutRequest

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

securityCheck

protected void securityCheck(com.amazonaws.services.s3.internal.crypto.ContentCryptoMaterial cekMaterial,
                 com.amazonaws.services.s3.internal.crypto.S3ObjectWrapper retrieved)

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.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.