diff options
Diffstat (limited to 'pg/src/main/j2me/org/bouncycastle/openpgp/PGPEncryptedDataGenerator.java')
| -rw-r--r-- | pg/src/main/j2me/org/bouncycastle/openpgp/PGPEncryptedDataGenerator.java | 360 |
1 files changed, 0 insertions, 360 deletions
diff --git a/pg/src/main/j2me/org/bouncycastle/openpgp/PGPEncryptedDataGenerator.java b/pg/src/main/j2me/org/bouncycastle/openpgp/PGPEncryptedDataGenerator.java deleted file mode 100644 index 6f36dbc9..00000000 --- a/pg/src/main/j2me/org/bouncycastle/openpgp/PGPEncryptedDataGenerator.java +++ /dev/null @@ -1,360 +0,0 @@ -package org.bouncycastle.openpgp; - -import java.io.IOException; -import java.io.OutputStream; -import java.security.SecureRandom; -import java.util.ArrayList; -import java.util.List; - -import org.bouncycastle.bcpg.BCPGOutputStream; -import org.bouncycastle.bcpg.HashAlgorithmTags; -import org.bouncycastle.bcpg.PacketTags; -import org.bouncycastle.bcpg.SymmetricKeyAlgorithmTags; -import org.bouncycastle.openpgp.operator.PBEKeyEncryptionMethodGenerator; -import org.bouncycastle.openpgp.operator.PGPDataEncryptor; -import org.bouncycastle.openpgp.operator.PGPDataEncryptorBuilder; -import org.bouncycastle.openpgp.operator.PGPDigestCalculator; -import org.bouncycastle.openpgp.operator.PGPKeyEncryptionMethodGenerator; -import org.bouncycastle.util.io.TeeOutputStream; - -/** - * Generator for encrypted objects. - */ -public class PGPEncryptedDataGenerator - implements SymmetricKeyAlgorithmTags, StreamGenerator -{ - /** - * Specifier for SHA-1 S2K PBE generator. - */ - public static final int S2K_SHA1 = HashAlgorithmTags.SHA1; - - /** - * Specifier for SHA-224 S2K PBE generator. - */ - public static final int S2K_SHA224 = HashAlgorithmTags.SHA224; - - /** - * Specifier for SHA-256 S2K PBE generator. - */ - public static final int S2K_SHA256 = HashAlgorithmTags.SHA256; - - /** - * Specifier for SHA-384 S2K PBE generator. - */ - public static final int S2K_SHA384 = HashAlgorithmTags.SHA384; - - /** - * Specifier for SHA-512 S2K PBE generator. - */ - public static final int S2K_SHA512 = HashAlgorithmTags.SHA512; - - private BCPGOutputStream pOut; - private OutputStream cOut; - private boolean oldFormat = false; - private PGPDigestCalculator digestCalc; - private OutputStream genOut; - private PGPDataEncryptorBuilder dataEncryptorBuilder; - - private List methods = new ArrayList(); - private int defAlgorithm; - private SecureRandom rand; - - /** - * Base constructor. - * - * @param encryptorBuilder builder to create actual data encryptor. - */ - public PGPEncryptedDataGenerator(PGPDataEncryptorBuilder encryptorBuilder) - { - this(encryptorBuilder, false); - } - - /** - * Base constructor with the option to turn on formatting for PGP 2.6.x compatibility. - * - * @param encryptorBuilder builder to create actual data encryptor. - * @param oldFormat PGP 2.6.x compatibility required. - */ - public PGPEncryptedDataGenerator(PGPDataEncryptorBuilder encryptorBuilder, boolean oldFormat) - { - this.dataEncryptorBuilder = encryptorBuilder; - this.oldFormat = oldFormat; - - this.defAlgorithm = dataEncryptorBuilder.getAlgorithm(); - this.rand = dataEncryptorBuilder.getSecureRandom(); - } - - /** - * Added a key encryption method to be used to encrypt the session data associated - * with this encrypted data. - * - * @param method key encryption method to use. - */ - public void addMethod(PGPKeyEncryptionMethodGenerator method) - { - methods.add(method); - } - - private void addCheckSum( - byte[] sessionInfo) - { - int check = 0; - - for (int i = 1; i != sessionInfo.length - 2; i++) - { - check += sessionInfo[i] & 0xff; - } - - sessionInfo[sessionInfo.length - 2] = (byte)(check >> 8); - sessionInfo[sessionInfo.length - 1] = (byte)(check); - } - - private byte[] createSessionInfo( - int algorithm, - byte[] keyBytes) - { - byte[] sessionInfo = new byte[keyBytes.length + 3]; - sessionInfo[0] = (byte) algorithm; - System.arraycopy(keyBytes, 0, sessionInfo, 1, keyBytes.length); - addCheckSum(sessionInfo); - return sessionInfo; - } - - /** - * If buffer is non null stream assumed to be partial, otherwise the - * length will be used to output a fixed length packet. - * <p> - * The stream created can be closed off by either calling close() - * on the stream or close() on the generator. Closing the returned - * stream does not close off the OutputStream parameter out. - * - * @param out - * @param length - * @param buffer - * @return - * @throws java.io.IOException - * @throws PGPException - * @throws IllegalStateException - */ - private OutputStream open( - OutputStream out, - long length, - byte[] buffer) - throws IOException, PGPException, IllegalStateException - { - if (cOut != null) - { - throw new IllegalStateException("generator already in open state"); - } - - if (methods.size() == 0) - { - throw new IllegalStateException("no encryption methods specified"); - } - - byte[] key = null; - - pOut = new BCPGOutputStream(out); - - defAlgorithm = dataEncryptorBuilder.getAlgorithm(); - rand = dataEncryptorBuilder.getSecureRandom(); - - if (methods.size() == 1) - { - - if (methods.get(0) instanceof PBEKeyEncryptionMethodGenerator) - { - PBEKeyEncryptionMethodGenerator m = (PBEKeyEncryptionMethodGenerator)methods.get(0); - - key = m.getKey(dataEncryptorBuilder.getAlgorithm()); - - pOut.writePacket(((PGPKeyEncryptionMethodGenerator)methods.get(0)).generate(defAlgorithm, null)); - } - else - { - key = PGPUtil.makeRandomKey(defAlgorithm, rand); - byte[] sessionInfo = createSessionInfo(defAlgorithm, key); - PGPKeyEncryptionMethodGenerator m = (PGPKeyEncryptionMethodGenerator)methods.get(0); - - pOut.writePacket(m.generate(defAlgorithm, sessionInfo)); - } - } - else // multiple methods - { - key = PGPUtil.makeRandomKey(defAlgorithm, rand); - byte[] sessionInfo = createSessionInfo(defAlgorithm, key); - - for (int i = 0; i != methods.size(); i++) - { - PGPKeyEncryptionMethodGenerator m = (PGPKeyEncryptionMethodGenerator)methods.get(i); - - pOut.writePacket(m.generate(defAlgorithm, sessionInfo)); - } - } - - try - { - PGPDataEncryptor dataEncryptor = dataEncryptorBuilder.build(key); - - digestCalc = dataEncryptor.getIntegrityCalculator(); - - if (buffer == null) - { - // - // we have to add block size + 2 for the generated IV and + 1 + 22 if integrity protected - // - if (digestCalc != null) - { - pOut = new ClosableBCPGOutputStream(out, PacketTags.SYM_ENC_INTEGRITY_PRO, length + dataEncryptor.getBlockSize() + 2 + 1 + 22); - - pOut.write(1); // version number - } - else - { - pOut = new ClosableBCPGOutputStream(out, PacketTags.SYMMETRIC_KEY_ENC, length + dataEncryptor.getBlockSize() + 2, oldFormat); - } - } - else - { - if (digestCalc != null) - { - pOut = new ClosableBCPGOutputStream(out, PacketTags.SYM_ENC_INTEGRITY_PRO, buffer); - pOut.write(1); // version number - } - else - { - pOut = new ClosableBCPGOutputStream(out, PacketTags.SYMMETRIC_KEY_ENC, buffer); - } - } - - genOut = cOut = dataEncryptor.getOutputStream(pOut); - - if (digestCalc != null) - { - genOut = new TeeOutputStream(digestCalc.getOutputStream(), cOut); - } - - byte[] inLineIv = new byte[dataEncryptor.getBlockSize() + 2]; - rand.nextBytes(inLineIv); - inLineIv[inLineIv.length - 1] = inLineIv[inLineIv.length - 3]; - inLineIv[inLineIv.length - 2] = inLineIv[inLineIv.length - 4]; - - genOut.write(inLineIv); - - return new WrappedGeneratorStream(genOut, this); - } - catch (Exception e) - { - throw new PGPException("Exception creating cipher", e); - } - } - - /** - * Return an outputstream which will encrypt the data as it is written - * to it. - * <p> - * The stream created can be closed off by either calling close() - * on the stream or close() on the generator. Closing the returned - * stream does not close off the OutputStream parameter out. - * - * @param out - * @param length - * @return OutputStream - * @throws IOException - * @throws PGPException - */ - public OutputStream open( - OutputStream out, - long length) - throws IOException, PGPException - { - return this.open(out, length, null); - } - - /** - * Return an outputstream which will encrypt the data as it is written - * to it. The stream will be written out in chunks according to the size of the - * passed in buffer. - * <p> - * The stream created can be closed off by either calling close() - * on the stream or close() on the generator. Closing the returned - * stream does not close off the OutputStream parameter out. - * <p> - * <b>Note</b>: if the buffer is not a power of 2 in length only the largest power of 2 - * bytes worth of the buffer will be used. - * - * @param out - * @param buffer the buffer to use. - * @return OutputStream - * @throws IOException - * @throws PGPException - */ - public OutputStream open( - OutputStream out, - byte[] buffer) - throws IOException, PGPException - { - return this.open(out, 0, buffer); - } - - /** - * Close off the encrypted object - this is equivalent to calling close on the stream - * returned by the open() method. - * <p> - * <b>Note</b>: This does not close the underlying output stream, only the stream on top of it created by the open() method. - * @throws java.io.IOException - */ - public void close() - throws IOException - { - if (cOut != null) - { - if (digestCalc != null) - { - // - // hand code a mod detection packet - // - BCPGOutputStream bOut = new BCPGOutputStream(genOut, PacketTags.MOD_DETECTION_CODE, 20); - - bOut.flush(); - - byte[] dig = digestCalc.getDigest(); - - cOut.write(dig); - } - - cOut.close(); - - cOut = null; - pOut = null; - } - } - - private class ClosableBCPGOutputStream - extends BCPGOutputStream - { - public ClosableBCPGOutputStream(OutputStream out, int symmetricKeyEnc, byte[] buffer) - throws IOException - { - super(out, symmetricKeyEnc, buffer); - } - - public ClosableBCPGOutputStream(OutputStream out, int symmetricKeyEnc, long length, boolean oldFormat) - throws IOException - { - super(out, symmetricKeyEnc, length, oldFormat); - } - - public ClosableBCPGOutputStream(OutputStream out, int symEncIntegrityPro, long length) - throws IOException - { - super(out, symEncIntegrityPro, length); - } - - public void close() - throws IOException - { - this.finish(); - } - } -} |