我需要使用bouncycastle提供程序使用pgp加密流。我能找到的所有例子都是关于采用纯文本文件并加密，但是我没有文件，重要的是纯文本永远不会写入磁盘。
我见过的大多数方法都在使用
PGPUtil.writeFileToLiteralData想要传入明文。我宁愿传递一个byte []或一个inputStream。
有人能指出我的一个例子
如果其他人偶然发现并想要完整的解决方案
package com.common.security.pgp;
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.security.NoSuchProviderException;
import java.security.SecureRandom;
import java.security.Security;
import java.util.Date;
import java.util.Iterator;
import org.bouncycastle.bcpg.ArmoredOutputStream;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openpgp.PGPCompressedData;
import org.bouncycastle.openpgp.PGPCompressedDataGenerator;
import org.bouncycastle.openpgp.PGPEncryptedData;
import org.bouncycastle.openpgp.PGPEncryptedDataGenerator;
import org.bouncycastle.openpgp.PGPEncryptedDataList;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPLiteralData;
import org.bouncycastle.openpgp.PGPLiteralDataGenerator;
import org.bouncycastle.openpgp.PGPObjectFactory;
import org.bouncycastle.openpgp.PGPPrivateKey;
import org.bouncycastle.openpgp.PGPPublicKey;
import org.bouncycastle.openpgp.PGPPublicKeyEncryptedData;
import org.bouncycastle.openpgp.PGPPublicKeyRing;
import org.bouncycastle.openpgp.PGPPublicKeyRingCollection;
import org.bouncycastle.openpgp.PGPSecretKey;
import org.bouncycastle.openpgp.PGPSecretKeyRingCollection;
import org.bouncycastle.openpgp.PGPUtil;
/**
* Simple routine to encrypt and decrypt using a Public and Private key with passphrase. This service
* routine provides the basic PGP services between byte arrays.
*
*/
public class PgpEncryption {
private static PGPPrivateKey findSecretKey(
PGPSecretKeyRingCollection pgpSec, long keyID, char[] pass)
throws PGPException, NoSuchProviderException {
PGPSecretKey pgpSecKey = pgpSec.getSecretKey(keyID);
if (pgpSecKey == null) {
return null;
}
return pgpSecKey.extractPrivateKey(pass, "BC");
}
/**
* decrypt the passed in message stream
*
* @param encrypted
* The message to be decrypted.
* @param passPhrase
* Pass phrase (key)
*
* @return Clear text as a byte array. I18N considerations are not handled
* by this routine
* @exception IOException
* @exception PGPException
* @exception NoSuchProviderException
*/
public static byte[] decrypt(byte[] encrypted, InputStream keyIn, char[] password)
throws IOException, PGPException, NoSuchProviderException {
InputStream in = new ByteArrayInputStream(encrypted);
in = PGPUtil.getDecoderStream(in);
PGPObjectFactory pgpF = new PGPObjectFactory(in);
PGPEncryptedDataList enc = null;
Object o = pgpF.nextObject();
//
// the first object might be a PGP marker packet.
//
if (o instanceof PGPEncryptedDataList) {
enc = (PGPEncryptedDataList) o;
} else {
enc = (PGPEncryptedDataList) pgpF.nextObject();
}
//
// find the secret key
//
Iterator it = enc.getEncryptedDataObjects();
PGPPrivateKey sKey = null;
PGPPublicKeyEncryptedData pbe = null;
PGPSecretKeyRingCollection pgpSec = new PGPSecretKeyRingCollection(
PGPUtil.getDecoderStream(keyIn));
while (sKey == null && it.hasNext()) {
pbe = (PGPPublicKeyEncryptedData) it.next();
sKey = findSecretKey(pgpSec, pbe.getKeyID(), password);
}
if (sKey == null) {
throw new IllegalArgumentException(
"secret key for message not found.");
}
InputStream clear = pbe.getDataStream(sKey, "BC");
PGPObjectFactory pgpFact = new PGPObjectFactory(clear);
PGPCompressedData cData = (PGPCompressedData) pgpFact.nextObject();
pgpFact = new PGPObjectFactory(cData.getDataStream());
PGPLiteralData ld = (PGPLiteralData) pgpFact.nextObject();
InputStream unc = ld.getInputStream();
ByteArrayOutputStream out = new ByteArrayOutputStream();
int ch;
while ((ch = unc.read()) >= 0) {
out.write(ch);
}
byte[] returnBytes = out.toByteArray();
out.close();
return returnBytes;
}
/**
* Simple PGP encryptor between byte[].
*
* @param clearData
* The test to be encrypted
* @param passPhrase
* The pass phrase (key). This method assumes that the key is a
* simple pass phrase, and does not yet support RSA or more
* sophisiticated keying.
* @param fileName
* File name. This is used in the Literal Data Packet (tag 11)
* which is really inly important if the data is to be related to
* a file to be recovered later. Because this routine does not
* know the source of the information, the caller can set
* something here for file name use that will be carried. If this
* routine is being used to encrypt SOAP MIME bodies, for
* example, use the file name from the MIME type, if applicable.
* Or anything else appropriate.
*
* @param armor
*
* @return encrypted data.
* @exception IOException
* @exception PGPException
* @exception NoSuchProviderException
*/
public static byte[] encrypt(byte[] clearData, PGPPublicKey encKey,
String fileName,boolean withIntegrityCheck, boolean armor)
throws IOException, PGPException, NoSuchProviderException {
if (fileName == null) {
fileName = PGPLiteralData.CONSOLE;
}
ByteArrayOutputStream encOut = new ByteArrayOutputStream();
OutputStream out = encOut;
if (armor) {
out = new ArmoredOutputStream(out);
}
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(
PGPCompressedDataGenerator.ZIP);
OutputStream cos = comData.open(bOut); // open it with the final
// destination
PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();
// we want to generate compressed data. This might be a user option
// later,
// in which case we would pass in bOut.
OutputStream pOut = lData.open(cos, // the compressed output stream
PGPLiteralData.BINARY, fileName, // "filename" to store
clearData.length, // length of clear data
new Date() // current time
);
pOut.write(clearData);
lData.close();
comData.close();
PGPEncryptedDataGenerator cPk = new PGPEncryptedDataGenerator(
PGPEncryptedData.CAST5, withIntegrityCheck, new SecureRandom(),
"BC");
cPk.addMethod(encKey);
byte[] bytes = bOut.toByteArray();
OutputStream cOut = cPk.open(out, bytes.length);
cOut.write(bytes); // obtain the actual bytes from the compressed stream
cOut.close();
out.close();
return encOut.toByteArray();
}
private static PGPPublicKey readPublicKey(InputStream in)
throws IOException, PGPException {
in = PGPUtil.getDecoderStream(in);
PGPPublicKeyRingCollection pgpPub = new PGPPublicKeyRingCollection(in);
//
// we just loop through the collection till we find a key suitable for
// encryption, in the real
// world you would probably want to be a bit smarter about this.
//
//
// iterate through the key rings.
//
Iterator rIt = pgpPub.getKeyRings();
while (rIt.hasNext()) {
PGPPublicKeyRing kRing = (PGPPublicKeyRing) rIt.next();
Iterator kIt = kRing.getPublicKeys();
while (kIt.hasNext()) {
PGPPublicKey k = (PGPPublicKey) kIt.next();
if (k.isEncryptionKey()) {
return k;
}
}
}
throw new IllegalArgumentException(
"Can't find encryption key in key ring.");
}
public static byte[] getBytesFromFile(File file) throws IOException {
InputStream is = new FileInputStream(file);
// Get the size of the file
long length = file.length();
if (length > Integer.MAX_VALUE) {
// File is too large
}
// Create the byte array to hold the data
byte[] bytes = new byte[(int)length];
// Read in the bytes
int offset = 0;
int numRead = 0;
while (offset < bytes.length
&& (numRead=is.read(bytes, offset, bytes.length-offset)) >= 0) {
offset += numRead;
}
// Ensure all the bytes have been read in
if (offset < bytes.length) {
throw new IOException("Could not completely read file "+file.getName());
}
// Close the input stream and return bytes
is.close();
return bytes;
}
public static void main(String[] args) throws Exception {
Security.addProvider(new BouncyCastleProvider());
byte[] original = "Hello world".getBytes();
System.out.println("Starting PGP test");
FileInputStream pubKey = new FileInputStream("/Users/me/pub.key");
byte[] encrypted = encrypt(original, readPublicKey(pubKey), null,
true, true);
FileOutputStream dfis = new FileOutputStream("/Users/me/enc.asc");
dfis.write(encrypted);
dfis.close();
byte[] encFromFile = getBytesFromFile(new File("/Users/me/enc.asc"));
FileInputStream secKey = new FileInputStream("/Users/me/sec.key");
System.out.println("\nencrypted data = '" + new String(encrypted) + "'");
byte[] decrypted = decrypt(encFromFile, secKey, "passphrase".toCharArray());
System.out.println("\ndecrypted data = '" + new String(decrypted) + "'");
}
}
答案 0 :(得分：12)
查看source of PGPUtil，您可以看到直接使用流或数组时要调用的API：
public static void writeFileToLiteralData(OutputStream out,
char fileType, File file, byte[] buffer) throws IOException {
PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();
OutputStream pOut = lData.open(out, fileType, file.getName(),
new Date(file.lastModified()), buffer);
FileInputStream in = new FileInputStream(file);
byte[] buf = new byte[buffer.length];
int len;
while ((len = in.read(buf)) > 0) {
pOut.write(buf, 0, len);
}
lData.close();
in.close();
}
答案 1 :(得分：2)
找到grepcode repository - payneteasy superfly sources
private static void writeBytesToLiteralData(OutputStream out,
char fileType, String name, byte[] bytes) throws IOException {
PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();
OutputStream pOut = lData.open(out, fileType, name,bytes.length, new Date());
pOut.write(bytes);
}
答案 2 :(得分：0)
您的代码对我非常有用。我在ColdFusion（使用Java）工作，需要获取密码，在LDIFDE的短导入文件中编码（在另一台服务器上的Active Directory中使用），我从不希望密码以明文形式触及磁盘。我稍微修改了它，添加了两个函数，它们抽象出了将字符串加密到磁盘和从磁盘解密的常见用例。谢谢@dstarh。
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.security.NoSuchProviderException;
import java.security.SecureRandom;
import java.security.Security;
import java.util.Date;
import java.util.Iterator;
import org.bouncycastle.bcpg.ArmoredOutputStream;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openpgp.PGPCompressedData;
import org.bouncycastle.openpgp.PGPCompressedDataGenerator;
import org.bouncycastle.openpgp.PGPEncryptedData;
import org.bouncycastle.openpgp.PGPEncryptedDataGenerator;
import org.bouncycastle.openpgp.PGPEncryptedDataList;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPLiteralData;
import org.bouncycastle.openpgp.PGPLiteralDataGenerator;
import org.bouncycastle.openpgp.PGPObjectFactory;
import org.bouncycastle.openpgp.PGPPrivateKey;
import org.bouncycastle.openpgp.PGPPublicKey;
import org.bouncycastle.openpgp.PGPPublicKeyEncryptedData;
import org.bouncycastle.openpgp.PGPPublicKeyRing;
import org.bouncycastle.openpgp.PGPPublicKeyRingCollection;
import org.bouncycastle.openpgp.PGPSecretKey;
import org.bouncycastle.openpgp.PGPSecretKeyRingCollection;
import org.bouncycastle.openpgp.PGPUtil;
/**
* Simple routine to encrypt and decrypt using a Public and Private key with passphrase. This service
* routine provides the basic PGP services between byte arrays.
*
*/
public class PgpEncryption {
public PgpEncryption() {
// Empty constructor
}
private static PGPPrivateKey findSecretKey(
PGPSecretKeyRingCollection pgpSec, long keyID, char[] pass)
throws PGPException, NoSuchProviderException {
PGPSecretKey pgpSecKey = pgpSec.getSecretKey(keyID);
if (pgpSecKey == null) {
return null;
}
return pgpSecKey.extractPrivateKey(pass, "BC");
}
/**
* decrypt the passed in message stream
*
* @param encrypted
* The message to be decrypted.
* @param passPhrase
* Pass phrase (key)
*
* @return Clear text as a byte array. I18N considerations are not handled
* by this routine
* @exception IOException
* @exception PGPException
* @exception NoSuchProviderException
*/
public static byte[] decrypt(byte[] encrypted, InputStream keyIn, char[] password)
throws IOException, PGPException, NoSuchProviderException {
InputStream in = new ByteArrayInputStream(encrypted);
in = PGPUtil.getDecoderStream(in);
PGPObjectFactory pgpF = new PGPObjectFactory(in);
PGPEncryptedDataList enc = null;
Object o = pgpF.nextObject();
//
// the first object might be a PGP marker packet.
//
if (o instanceof PGPEncryptedDataList) {
enc = (PGPEncryptedDataList) o;
} else {
enc = (PGPEncryptedDataList) pgpF.nextObject();
}
//
// find the secret key
//
Iterator it = enc.getEncryptedDataObjects();
PGPPrivateKey sKey = null;
PGPPublicKeyEncryptedData pbe = null;
PGPSecretKeyRingCollection pgpSec = new PGPSecretKeyRingCollection(
PGPUtil.getDecoderStream(keyIn));
while (sKey == null && it.hasNext()) {
pbe = (PGPPublicKeyEncryptedData) it.next();
sKey = findSecretKey(pgpSec, pbe.getKeyID(), password);
}
if (sKey == null) {
throw new IllegalArgumentException(
"secret key for message not found.");
}
InputStream clear = pbe.getDataStream(sKey, "BC");
PGPObjectFactory pgpFact = new PGPObjectFactory(clear);
PGPCompressedData cData = (PGPCompressedData) pgpFact.nextObject();
pgpFact = new PGPObjectFactory(cData.getDataStream());
PGPLiteralData ld = (PGPLiteralData) pgpFact.nextObject();
InputStream unc = ld.getInputStream();
ByteArrayOutputStream out = new ByteArrayOutputStream();
int ch;
while ((ch = unc.read()) >= 0) {
out.write(ch);
}
byte[] returnBytes = out.toByteArray();
out.close();
return returnBytes;
}
/**
* Simple PGP encryptor between byte[].
*
* @param clearData
* The test to be encrypted
* @param passPhrase
* The pass phrase (key). This method assumes that the key is a
* simple pass phrase, and does not yet support RSA or more
* sophisiticated keying.
* @param fileName
* File name. This is used in the Literal Data Packet (tag 11)
* which is really inly important if the data is to be related to
* a file to be recovered later. Because this routine does not
* know the source of the information, the caller can set
* something here for file name use that will be carried. If this
* routine is being used to encrypt SOAP MIME bodies, for
* example, use the file name from the MIME type, if applicable.
* Or anything else appropriate.
*
* @param armor
*
* @return encrypted data.
* @exception IOException
* @exception PGPException
* @exception NoSuchProviderException
*/
public static byte[] encrypt(byte[] clearData, PGPPublicKey encKey,
String fileName,boolean withIntegrityCheck, boolean armor)
throws IOException, PGPException, NoSuchProviderException {
if (fileName == null) {
fileName = PGPLiteralData.CONSOLE;
}
ByteArrayOutputStream encOut = new ByteArrayOutputStream();
OutputStream out = encOut;
if (armor) {
out = new ArmoredOutputStream(out);
}
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(
PGPCompressedDataGenerator.ZIP);
OutputStream cos = comData.open(bOut); // open it with the final
// destination
PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();
// we want to generate compressed data. This might be a user option
// later,
// in which case we would pass in bOut.
OutputStream pOut = lData.open(cos, // the compressed output stream
PGPLiteralData.BINARY, fileName, // "filename" to store
clearData.length, // length of clear data
new Date() // current time
);
pOut.write(clearData);
lData.close();
comData.close();
PGPEncryptedDataGenerator cPk = new PGPEncryptedDataGenerator(
PGPEncryptedData.CAST5, withIntegrityCheck, new SecureRandom(),
"BC");
cPk.addMethod(encKey);
byte[] bytes = bOut.toByteArray();
OutputStream cOut = cPk.open(out, bytes.length);
cOut.write(bytes); // obtain the actual bytes from the compressed stream
cOut.close();
out.close();
return encOut.toByteArray();
}
private static PGPPublicKey readPublicKey(InputStream in)
throws IOException, PGPException {
in = PGPUtil.getDecoderStream(in);
PGPPublicKeyRingCollection pgpPub = new PGPPublicKeyRingCollection(in);
//
// we just loop through the collection till we find a key suitable for
// encryption, in the real
// world you would probably want to be a bit smarter about this.
//
//
// iterate through the key rings.
//
Iterator rIt = pgpPub.getKeyRings();
while (rIt.hasNext()) {
PGPPublicKeyRing kRing = (PGPPublicKeyRing) rIt.next();
Iterator kIt = kRing.getPublicKeys();
while (kIt.hasNext()) {
PGPPublicKey k = (PGPPublicKey) kIt.next();
if (k.isEncryptionKey()) {
return k;
}
}
}
throw new IllegalArgumentException(
"Can't find encryption key in key ring.");
}
public static byte[] getBytesFromFile(File file) throws IOException {
InputStream is = new FileInputStream(file);
// Get the size of the file
long length = file.length();
if (length > Integer.MAX_VALUE) {
// File is too large
}
// Create the byte array to hold the data
byte[] bytes = new byte[(int)length];
// Read in the bytes
int offset = 0;
int numRead = 0;
while (offset < bytes.length
&& (numRead=is.read(bytes, offset, bytes.length-offset)) >= 0) {
offset += numRead;
}
// Ensure all the bytes have been read in
if (offset < bytes.length) {
throw new IOException("Could not completely read file "+file.getName());
}
// Close the input stream and return bytes
is.close();
return bytes;
}
public static String encryptToFile(String inputStr, String keyFile, String outFile) throws Exception {
Security.addProvider(new BouncyCastleProvider());
byte[] original = inputStr.getBytes();
FileInputStream pubKey = new FileInputStream(keyFile);
byte[] encrypted = encrypt(original, readPublicKey(pubKey), null,
true, true);
FileOutputStream dfis = new FileOutputStream(outFile);
dfis.write(encrypted);
dfis.close();
return new String(encrypted);
}
public static String decryptFromFile(String passphrase, String keyFile, String inputFile) throws Exception {
Security.addProvider(new BouncyCastleProvider());
byte[] encFromFile = getBytesFromFile(new File(inputFile));
FileInputStream secKey = new FileInputStream(keyFile);
byte[] decrypted = decrypt(encFromFile, secKey, passphrase.toCharArray());
return new String(decrypted);
}
public static void main(String[] args) throws Exception {
String encrypted = encryptToFile("Hello world","pub.asc","enc.asc");
System.out.println("\nencrypted data = '" + new String(encrypted) + "'");
String decrypted = decryptFromFile("open sesame", "secret.asc", "enc.asc");
System.out.println("\ndecrypted data = '" + decrypted + "'");
}
}
答案 3 :(得分：0)
此帖子可能很旧，但此答案可能对其他人有用。为了避免写入磁盘，您要做的就是加密和解密文本。您可以执行以下操作（从原始文章中的代码段）...
// the string you will like to encrypt
byte[] original = "I love programming".getBytes();
// KeyProvider.PUBLIC_KEY this is just a string holding your public key. you can have it stored in memory or something.
byte[] encrypted = encrypt(original, readPublicKey(new ByteArrayInputStream(KeyProvider.PUBLIC_KEY.getBytes())), null, true, true);
System.out.println(new String(encrypted)); // this will output your encrypted message
//encryted here is the encrypted string in byte array you will like to decrypt and also the KeyProvider.PRIVATE_KEY is string holding your private key
byte[] decrypted = decrypt(encrypted, new ByteArrayInputStream(KeyProvider.PRIVATE_KEY.getBytes()), "".toCharArray());
System.out.println(new String(decrypted)); //output the decrypted message
希望这会有所帮助
答案 4 :(得分：0)
这是我的解决方案。在整个压缩和加密过程中不会创建任何文件。
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openpgp.*;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.security.NoSuchProviderException;
import java.security.SecureRandom;
import java.security.Security;
import java.util.Date;
import java.util.Iterator;
public class PgpHelper {
public static byte[] encrypt(String fileName, String content, String pgpPublicKey) throws IOException, PGPException, NoSuchProviderException {
Security.addProvider(new BouncyCastleProvider());
ByteArrayOutputStream zipOut = new ByteArrayOutputStream();
PGPCompressedDataGenerator zipData = new PGPCompressedDataGenerator(PGPCompressedData.ZIP);
OutputStream zipPacket = new PGPLiteralDataGenerator()
.open(zipData.open(zipOut), PGPLiteralData.BINARY, fileName, content.length(), new Date());
zipPacket.write(content.getBytes(StandardCharsets.UTF_8));
zipPacket.close();
zipData.close();
byte[] zipBytes = zipOut.toByteArray();
zipOut.close();
PGPEncryptedDataGenerator encryptor = new PGPEncryptedDataGenerator(
PGPEncryptedData.CAST5, true, new SecureRandom(), "BC");
InputStream keyIn = new ByteArrayInputStream(pgpPublicKey.getBytes());
encryptor.addMethod(readPublicKey(keyIn));
keyIn.close();
ByteArrayOutputStream encryptOut = new ByteArrayOutputStream();
OutputStream encryptPacket = encryptor.open(encryptOut, zipBytes.length);
encryptPacket.write(zipBytes);
encryptPacket.close();
byte[] encryptBytes = encryptOut.toByteArray();
encryptOut.close();
return encryptBytes;
}
@SuppressWarnings("unchecked")
private static PGPPublicKey readPublicKey(InputStream in) throws IOException, PGPException {
PGPPublicKeyRingCollection pgpPub = new PGPPublicKeyRingCollection(PGPUtil.getDecoderStream(in));
Iterator<PGPPublicKeyRing> itKeyRings = pgpPub.getKeyRings();
while (itKeyRings.hasNext()) {
PGPPublicKeyRing keyRing = itKeyRings.next();
Iterator<PGPPublicKey> itKeys = keyRing.getPublicKeys();
while (itKeys.hasNext()) {
PGPPublicKey key = itKeys.next();
if (key.isEncryptionKey()) {
return key;
}
}
}
throw new IllegalArgumentException("Can't find encryption key in key ring.");
}
}