diff options
Diffstat (limited to 'src/com/trilead/ssh2/crypto/cipher/BlockCipherFactory.java')
-rw-r--r-- | src/com/trilead/ssh2/crypto/cipher/BlockCipherFactory.java | 230 |
1 files changed, 115 insertions, 115 deletions
diff --git a/src/com/trilead/ssh2/crypto/cipher/BlockCipherFactory.java b/src/com/trilead/ssh2/crypto/cipher/BlockCipherFactory.java index cf18f43..6e386a5 100644 --- a/src/com/trilead/ssh2/crypto/cipher/BlockCipherFactory.java +++ b/src/com/trilead/ssh2/crypto/cipher/BlockCipherFactory.java @@ -1,115 +1,115 @@ -
-package com.trilead.ssh2.crypto.cipher;
-
-import java.util.Vector;
-
-/**
- * BlockCipherFactory.
- *
- * @author Christian Plattner, plattner@trilead.com
- * @version $Id: BlockCipherFactory.java,v 1.2 2008/04/01 12:38:09 cplattne Exp $
- */
-public class BlockCipherFactory
-{
- static class CipherEntry
- {
- String type;
- int blocksize;
- int keysize;
- String cipherClass;
-
- public CipherEntry(String type, int blockSize, int keySize, String cipherClass)
- {
- this.type = type;
- this.blocksize = blockSize;
- this.keysize = keySize;
- this.cipherClass = cipherClass;
- }
- }
-
- static Vector<CipherEntry> ciphers = new Vector<CipherEntry>();
-
- static
- {
- /* Higher Priority First */
-
- ciphers.addElement(new CipherEntry("aes256-ctr", 16, 32, "com.trilead.ssh2.crypto.cipher.AES"));
- ciphers.addElement(new CipherEntry("aes192-ctr", 16, 24, "com.trilead.ssh2.crypto.cipher.AES"));
- ciphers.addElement(new CipherEntry("aes128-ctr", 16, 16, "com.trilead.ssh2.crypto.cipher.AES"));
- ciphers.addElement(new CipherEntry("blowfish-ctr", 8, 16, "com.trilead.ssh2.crypto.cipher.BlowFish"));
-
- ciphers.addElement(new CipherEntry("aes256-cbc", 16, 32, "com.trilead.ssh2.crypto.cipher.AES"));
- ciphers.addElement(new CipherEntry("aes192-cbc", 16, 24, "com.trilead.ssh2.crypto.cipher.AES"));
- ciphers.addElement(new CipherEntry("aes128-cbc", 16, 16, "com.trilead.ssh2.crypto.cipher.AES"));
- ciphers.addElement(new CipherEntry("blowfish-cbc", 8, 16, "com.trilead.ssh2.crypto.cipher.BlowFish"));
-
- ciphers.addElement(new CipherEntry("3des-ctr", 8, 24, "com.trilead.ssh2.crypto.cipher.DESede"));
- ciphers.addElement(new CipherEntry("3des-cbc", 8, 24, "com.trilead.ssh2.crypto.cipher.DESede"));
- }
-
- public static String[] getDefaultCipherList()
- {
- String list[] = new String[ciphers.size()];
- for (int i = 0; i < ciphers.size(); i++)
- {
- CipherEntry ce = ciphers.elementAt(i);
- list[i] = new String(ce.type);
- }
- return list;
- }
-
- public static void checkCipherList(String[] cipherCandidates)
- {
- for (int i = 0; i < cipherCandidates.length; i++)
- getEntry(cipherCandidates[i]);
- }
-
- public static BlockCipher createCipher(String type, boolean encrypt, byte[] key, byte[] iv)
- {
- try
- {
- CipherEntry ce = getEntry(type);
- Class cc = Class.forName(ce.cipherClass);
- BlockCipher bc = (BlockCipher) cc.newInstance();
-
- if (type.endsWith("-cbc"))
- {
- bc.init(encrypt, key);
- return new CBCMode(bc, iv, encrypt);
- }
- else if (type.endsWith("-ctr"))
- {
- bc.init(true, key);
- return new CTRMode(bc, iv, encrypt);
- }
- throw new IllegalArgumentException("Cannot instantiate " + type);
- }
- catch (Exception e)
- {
- throw new IllegalArgumentException("Cannot instantiate " + type);
- }
- }
-
- private static CipherEntry getEntry(String type)
- {
- for (int i = 0; i < ciphers.size(); i++)
- {
- CipherEntry ce = ciphers.elementAt(i);
- if (ce.type.equals(type))
- return ce;
- }
- throw new IllegalArgumentException("Unkown algorithm " + type);
- }
-
- public static int getBlockSize(String type)
- {
- CipherEntry ce = getEntry(type);
- return ce.blocksize;
- }
-
- public static int getKeySize(String type)
- {
- CipherEntry ce = getEntry(type);
- return ce.keysize;
- }
-}
+ +package com.trilead.ssh2.crypto.cipher; + +import java.util.Vector; + +/** + * BlockCipherFactory. + * + * @author Christian Plattner, plattner@trilead.com + * @version $Id: BlockCipherFactory.java,v 1.2 2008/04/01 12:38:09 cplattne Exp $ + */ +public class BlockCipherFactory +{ + static class CipherEntry + { + String type; + int blocksize; + int keysize; + String cipherClass; + + public CipherEntry(String type, int blockSize, int keySize, String cipherClass) + { + this.type = type; + this.blocksize = blockSize; + this.keysize = keySize; + this.cipherClass = cipherClass; + } + } + + static Vector<CipherEntry> ciphers = new Vector<CipherEntry>(); + + static + { + /* Higher Priority First */ + + ciphers.addElement(new CipherEntry("aes256-ctr", 16, 32, "com.trilead.ssh2.crypto.cipher.AES")); + ciphers.addElement(new CipherEntry("aes192-ctr", 16, 24, "com.trilead.ssh2.crypto.cipher.AES")); + ciphers.addElement(new CipherEntry("aes128-ctr", 16, 16, "com.trilead.ssh2.crypto.cipher.AES")); + ciphers.addElement(new CipherEntry("blowfish-ctr", 8, 16, "com.trilead.ssh2.crypto.cipher.BlowFish")); + + ciphers.addElement(new CipherEntry("aes256-cbc", 16, 32, "com.trilead.ssh2.crypto.cipher.AES")); + ciphers.addElement(new CipherEntry("aes192-cbc", 16, 24, "com.trilead.ssh2.crypto.cipher.AES")); + ciphers.addElement(new CipherEntry("aes128-cbc", 16, 16, "com.trilead.ssh2.crypto.cipher.AES")); + ciphers.addElement(new CipherEntry("blowfish-cbc", 8, 16, "com.trilead.ssh2.crypto.cipher.BlowFish")); + + ciphers.addElement(new CipherEntry("3des-ctr", 8, 24, "com.trilead.ssh2.crypto.cipher.DESede")); + ciphers.addElement(new CipherEntry("3des-cbc", 8, 24, "com.trilead.ssh2.crypto.cipher.DESede")); + } + + public static String[] getDefaultCipherList() + { + String list[] = new String[ciphers.size()]; + for (int i = 0; i < ciphers.size(); i++) + { + CipherEntry ce = ciphers.elementAt(i); + list[i] = new String(ce.type); + } + return list; + } + + public static void checkCipherList(String[] cipherCandidates) + { + for (int i = 0; i < cipherCandidates.length; i++) + getEntry(cipherCandidates[i]); + } + + public static BlockCipher createCipher(String type, boolean encrypt, byte[] key, byte[] iv) + { + try + { + CipherEntry ce = getEntry(type); + Class cc = Class.forName(ce.cipherClass); + BlockCipher bc = (BlockCipher) cc.newInstance(); + + if (type.endsWith("-cbc")) + { + bc.init(encrypt, key); + return new CBCMode(bc, iv, encrypt); + } + else if (type.endsWith("-ctr")) + { + bc.init(true, key); + return new CTRMode(bc, iv, encrypt); + } + throw new IllegalArgumentException("Cannot instantiate " + type); + } + catch (Exception e) + { + throw new IllegalArgumentException("Cannot instantiate " + type); + } + } + + private static CipherEntry getEntry(String type) + { + for (int i = 0; i < ciphers.size(); i++) + { + CipherEntry ce = ciphers.elementAt(i); + if (ce.type.equals(type)) + return ce; + } + throw new IllegalArgumentException("Unkown algorithm " + type); + } + + public static int getBlockSize(String type) + { + CipherEntry ce = getEntry(type); + return ce.blocksize; + } + + public static int getKeySize(String type) + { + CipherEntry ce = getEntry(type); + return ce.keysize; + } +} |