java.com.ionic.sdk.agent.cipher.file.PdfFileCipher Maven / Gradle / Ivy
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The Ionic Java SDK provides an easy-to-use interface to the Ionic Platform.
package com.ionic.sdk.agent.cipher.file;
import com.ionic.sdk.agent.cipher.file.cover.FileCryptoCoverPageServicesDefault;
import com.ionic.sdk.agent.cipher.file.cover.FileCryptoCoverPageServicesInterface;
import com.ionic.sdk.agent.cipher.file.data.CipherFamily;
import com.ionic.sdk.agent.cipher.file.data.FileCipher;
import com.ionic.sdk.agent.cipher.file.data.FileCryptoDecryptAttributes;
import com.ionic.sdk.agent.cipher.file.data.FileCryptoEncryptAttributes;
import com.ionic.sdk.agent.cipher.file.data.FileCryptoFileInfo;
import com.ionic.sdk.agent.cipher.file.data.FileType;
import com.ionic.sdk.agent.cipher.file.family.pdf.input.PdfInput;
import com.ionic.sdk.agent.cipher.file.family.pdf.output.PdfOutput;
import com.ionic.sdk.core.io.SeekableByteBufferChannel;
import com.ionic.sdk.core.value.Value;
import com.ionic.sdk.error.IonicException;
import com.ionic.sdk.error.SdkData;
import com.ionic.sdk.error.SdkError;
import com.ionic.sdk.key.KeyServices;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.SeekableByteChannel;
import java.nio.channels.WritableByteChannel;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.logging.Logger;
/**
* Cipher that supports PDF (PDF 32000-1:2008) file encryption / decryption.
*/
public final class PdfFileCipher extends FileCipherAbstract {
/**
* Class scoped logger.
*/
private final Logger logger = Logger.getLogger(getClass().getName());
/**
* File format family PDF.
*/
public static final String FAMILY = FileCipher.Pdf.FAMILY;
/**
* File format family PDF, version 1.0.
*/
private static final String VERSION_1_0 = "1.0";
/**
* File format family PDF, latest version.
*/
public static final String VERSION_LATEST = VERSION_1_0;
/**
* Constructor.
*
* @param agent the key services implementation; used to provide keys for cryptography operations
*/
public PdfFileCipher(final KeyServices agent) {
super(agent, new FileCryptoCoverPageServicesDefault());
}
/**
* Constructor.
*
* @param agent the key services implementation; used to provide keys for cryptography operations
* @param coverPageServices the cover page services implementation
*/
public PdfFileCipher(final KeyServices agent, final FileCryptoCoverPageServicesInterface coverPageServices) {
super(agent, coverPageServices);
}
@Deprecated
@Override
public String getFamily() {
return FAMILY;
}
@Override
public String getFamilyString() {
return FAMILY;
}
@Override
public CipherFamily getCipherFamily() {
return CipherFamily.FAMILY_PDF;
}
@Override
public List getVersions() {
return new ArrayList(SUPPORTED_VERSIONS);
}
@Override
public String getDefaultVersion() {
return VERSION_1_0;
}
@Override
public boolean isVersionSupported(final String version) {
return SUPPORTED_VERSIONS.contains(version);
}
/**
* The versions of the encryption format supported by this FileCipher implementation.
*/
private static final List SUPPORTED_VERSIONS = Collections.singletonList(VERSION_1_0);
@Override
public FileCryptoFileInfo getFileInfo(final String filePath) throws IonicException {
final FileCryptoFileInfo fileInfo = new FileCryptoFileInfo();
final File file = new File(filePath);
if (file.exists() && file.length() > 0) {
try (RandomAccessFile raf = new RandomAccessFile(file, FileCipher.Generic.OPEN_MODE_ENCRYPT)) {
try (SeekableByteChannel channel = raf.getChannel()) {
final PdfInput ionicInput = new PdfInput(channel, getServices());
final FileCryptoDecryptAttributes decryptAttributes = new FileCryptoDecryptAttributes();
try {
ionicInput.init(fileInfo, decryptAttributes);
} catch (IonicException e) {
logger.fine(e.getMessage()); // if file cannot be parsed as cipherText, default to plainText
}
}
} catch (IOException e) {
throw new IonicException(SdkError.ISFILECRYPTO_OPENFILE, e);
}
}
return fileInfo;
}
@Override
public FileCryptoFileInfo getFileInfo(final byte[] text) throws IonicException {
final FileCryptoFileInfo fileInfo = new FileCryptoFileInfo();
if (text.length > 0) {
try (SeekableByteChannel channel = new SeekableByteBufferChannel(text)) {
final PdfInput ionicInput = new PdfInput(channel, getServices());
final FileCryptoDecryptAttributes decryptAttributes = new FileCryptoDecryptAttributes();
ionicInput.init(fileInfo, decryptAttributes);
} catch (IonicException e) {
logger.fine(e.getMessage()); // if file cannot be parsed as Ionic cipherText, default to plainText
} catch (IOException e) {
throw new IonicException(SdkError.ISFILECRYPTO_EOF);
}
}
return fileInfo;
}
@Override
protected byte[] encryptInternal(final byte[] plainText,
final FileCryptoEncryptAttributes attributes) throws IonicException {
SdkData.checkTrue((plainText != null), SdkError.ISFILECRYPTO_NULL_INPUT, byte[].class.getName());
SdkData.checkTrue((plainText.length > 0), SdkError.ISFILECRYPTO_EOF);
SdkData.checkTrue((attributes != null), SdkError.ISFILECRYPTO_NULL_INPUT,
FileCryptoEncryptAttributes.class.getName());
final BufferedInputStream is = new BufferedInputStream(new ByteArrayInputStream(plainText));
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
final PdfOutput ionicOutput = encryptInternal(is, plainText.length, bos, attributes);
final byte[] cipherText = bos.toByteArray();
// fix up ionic payload prologue to contain the correct generic payload length
final byte[] payloadPrologue = ionicOutput.getIonicPayloadPrologue();
System.arraycopy(payloadPrologue, 0, cipherText, ionicOutput.getOffsetPayloadIonic(), payloadPrologue.length);
// write generic cipherText signature in the correct location
final byte[] signature = ionicOutput.getSignature();
if (signature != null) {
System.arraycopy(signature, 0, cipherText, ionicOutput.getSignatureOffset(), signature.length);
}
return cipherText;
}
@Override
protected byte[] decryptInternal(final byte[] cipherText,
final FileCryptoDecryptAttributes attributes) throws IonicException {
SdkData.checkTrue((cipherText != null), SdkError.ISFILECRYPTO_NULL_INPUT);
SdkData.checkTrue((cipherText.length > 0), SdkError.ISFILECRYPTO_NULL_INPUT);
SdkData.checkTrue((attributes != null), SdkError.ISFILECRYPTO_NULL_INPUT,
FileCryptoDecryptAttributes.class.getName());
SdkData.checkTrue(attributes.getKeyId().isEmpty(), SdkError.ISFILECRYPTO_INVALIDVALUE);
SdkData.checkTrue(attributes.getFamily() == CipherFamily.FAMILY_UNKNOWN, SdkError.ISFILECRYPTO_INVALIDVALUE);
SdkData.checkTrue(attributes.getVersion().isEmpty(), SdkError.ISFILECRYPTO_INVALIDVALUE);
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
final BufferedOutputStream os = new BufferedOutputStream(bos);
try (SeekableByteChannel channel = new SeekableByteBufferChannel(cipherText)) {
decryptInternal(channel, os, attributes);
} catch (IOException e) {
throw new IonicException(SdkError.ISFILECRYPTO_OPENFILE, e);
}
return bos.toByteArray();
}
@Override
protected void encryptInternal(final File sourceFile, final File targetFile,
final FileCryptoEncryptAttributes attributes) throws IonicException {
SdkData.checkTrue((attributes != null), SdkError.ISFILECRYPTO_NULL_INPUT,
FileCryptoEncryptAttributes.class.getName());
final String version = attributes.getVersion();
final boolean versionOK = (SUPPORTED_VERSIONS.contains(version) || Value.isEmpty(version));
SdkData.checkTrue(versionOK, SdkError.ISFILECRYPTO_VERSION_UNSUPPORTED);
try {
encryptInternal2(sourceFile, targetFile, attributes);
} catch (IOException e) {
throw new IonicException(SdkError.ISFILECRYPTO_OPENFILE, e);
}
}
/**
* Encrypts an input file into an output file.
*
* @param sourceFile the input file
* @param targetFile the output file
* @param attributes the attributes to be used in the context of the encrypt operation
* @throws IonicException on cryptography failures
* @throws IOException on stream read / write failures
*/
private void encryptInternal2(final File sourceFile, final File targetFile,
final FileCryptoEncryptAttributes attributes) throws IonicException, IOException {
final FileInputStream is = new FileInputStream(sourceFile);
try {
encryptInternal3(is, sourceFile.length(), targetFile, attributes);
} finally {
is.close();
}
// working around "spotbugs" issue; until it is fixed, avoid "try with resources"
// https://github.com/spotbugs/spotbugs/issues/293
// https://github.com/spotbugs/spotbugs/issues/493
/*
try (FileInputStream is = new FileInputStream(sourceFile)) {
encryptInternal3(is, targetFile, attributes);
}
*/
}
/**
* Encrypts an input stream into an output file.
*
* @param plainText the input resource containing the PDF plaintext to encrypt
* @param sizeInput the length of the resource to be encrypted
* @param targetFile the output file
* @param attributes the attributes to be used in the context of the encrypt operation
* @throws IonicException on cryptography failures
* @throws IOException on stream read / write failures
*/
private void encryptInternal3(final InputStream plainText, final long sizeInput, final File targetFile,
final FileCryptoEncryptAttributes attributes) throws IonicException, IOException {
final RandomAccessFile randomAccessFile = new RandomAccessFile(
targetFile, FileCipher.Generic.OPEN_MODE_ENCRYPT);
final FileOutputStream cipherText = new FileOutputStream(randomAccessFile.getFD());
try {
final PdfOutput ionicOutput = encryptInternal(plainText, sizeInput, cipherText, attributes);
// fix up ionic payload prologue to contain the correct generic payload length
final FileChannel channel = randomAccessFile.getChannel();
channel.position(ionicOutput.getOffsetPayloadIonic());
channel.write(ByteBuffer.wrap(ionicOutput.getIonicPayloadPrologue()));
// write generic cipherText signature in the correct location
channel.position(ionicOutput.getSignatureOffset());
channel.write(ByteBuffer.wrap(ionicOutput.getSignature()));
} finally {
cipherText.close();
}
}
@Override
protected void decryptInternal(final File sourceFile, final File targetFile,
final FileCryptoDecryptAttributes attributes) throws IonicException {
SdkData.checkTrue((attributes != null), SdkError.ISFILECRYPTO_NULL_INPUT,
FileCryptoDecryptAttributes.class.getName());
SdkData.checkTrue(attributes.getKeyId().isEmpty(), SdkError.ISFILECRYPTO_INVALIDVALUE);
SdkData.checkTrue(attributes.getFamily() == CipherFamily.FAMILY_UNKNOWN, SdkError.ISFILECRYPTO_INVALIDVALUE);
SdkData.checkTrue(attributes.getVersion().isEmpty(), SdkError.ISFILECRYPTO_INVALIDVALUE);
try {
decryptInternal2(sourceFile, targetFile, attributes);
} catch (IOException e) {
throw new IonicException(SdkError.ISFILECRYPTO_OPENFILE, e);
}
}
/**
* Decrypts an input file into an output file.
*
* @param sourceFile the input file
* @param targetFile the output file
* @param attributes the attributes to be used in the context of the decrypt operation
* @throws IonicException on cryptography failures
* @throws IOException on stream read / write failures
*/
private void decryptInternal2(final File sourceFile, final File targetFile,
final FileCryptoDecryptAttributes attributes) throws IonicException, IOException {
try (RandomAccessFile raf = new RandomAccessFile(sourceFile, FileCipher.Generic.OPEN_MODE_ENCRYPT)) {
try (SeekableByteChannel channel = raf.getChannel()) {
decryptInternal3(channel, targetFile, attributes);
}
}
}
/**
* Decrypts an input stream into an output file.
*
* @param cipherText the input stream
* @param targetFile the output file
* @param attributes the attributes to be used in the context of the decrypt operation
* @throws IonicException on cryptography failures
* @throws IOException on stream read / write failures
*/
private void decryptInternal3(final SeekableByteChannel cipherText, final File targetFile,
final FileCryptoDecryptAttributes attributes) throws IonicException, IOException {
try (FileOutputStream fos = new FileOutputStream(targetFile)) {
final BufferedOutputStream os = new BufferedOutputStream(fos);
decryptInternal(cipherText, os, attributes);
os.close();
}
}
/**
* Common utility function for implementing encryption of various stream formats.
*
* @param plainText the input stream presenting the binary plain text input buffer
* @param sizeInput the length of the resource to be encrypted
* @param cipherText the output stream presenting the binary cipher text output buffer
* @param encryptAttributes the attributes to be used in the context of the encrypt operation
* @return internal state associated with the encryption operation; this is needed to insert
* the file signature after the stream is written
* @throws IonicException on cryptography failures; or stream read / write failures
*/
private PdfOutput encryptInternal(final InputStream plainText, final long sizeInput, final OutputStream cipherText,
final FileCryptoEncryptAttributes encryptAttributes) throws IonicException {
try {
final ReadableByteChannel plainChannel = Channels.newChannel(plainText);
final PdfOutput ionicOutput = new PdfOutput(cipherText, sizeInput, getServices(), getCoverPageServices());
ionicOutput.init(encryptAttributes);
final ByteBuffer bufferPlainText = ionicOutput.getPlainText();
while (plainText.available() > 0) {
bufferPlainText.clear();
plainChannel.read(bufferPlainText);
bufferPlainText.limit(bufferPlainText.position());
bufferPlainText.position(0);
ionicOutput.write(bufferPlainText);
}
ionicOutput.doFinal();
cipherText.flush();
return ionicOutput;
} catch (IOException e) {
throw new IonicException(SdkError.ISFILECRYPTO_STREAM_WRITE, e);
}
}
/**
* Common utility function for implementing decryption of various stream formats.
*
* @param cipherText the input stream presenting the binary cipher text input buffer
* @param plainText the output stream presenting the binary plain text output buffer
* @param attributes the attributes to be used in the context of the decrypt operation
* @throws IonicException on cryptography failures; or stream read / write failures
*/
private void decryptInternal(final SeekableByteChannel cipherText, final OutputStream plainText,
final FileCryptoDecryptAttributes attributes) throws IonicException {
try {
final WritableByteChannel plainChannel = Channels.newChannel(plainText);
final PdfInput ionicInput = new PdfInput(cipherText, getServices());
final FileCryptoFileInfo fileInfo = new FileCryptoFileInfo();
ionicInput.init(fileInfo, attributes);
while (ionicInput.available() > 0) {
plainChannel.write(ionicInput.read());
}
ionicInput.doFinal();
plainText.flush();
} catch (IonicException e) {
handleFileCryptoException(e, FileType.FILETYPE_PDF, attributes);
} catch (IOException e) {
throw new IonicException(SdkError.ISFILECRYPTO_STREAM_WRITE, e);
}
}
}