diff options
Diffstat (limited to 'prov/src/main/java/org/bouncycastle/jcajce/provider/symmetric/util/BaseStreamCipher.java')
| -rw-r--r-- | prov/src/main/java/org/bouncycastle/jcajce/provider/symmetric/util/BaseStreamCipher.java | 359 |
1 files changed, 0 insertions, 359 deletions
diff --git a/prov/src/main/java/org/bouncycastle/jcajce/provider/symmetric/util/BaseStreamCipher.java b/prov/src/main/java/org/bouncycastle/jcajce/provider/symmetric/util/BaseStreamCipher.java deleted file mode 100644 index f376aa2c..00000000 --- a/prov/src/main/java/org/bouncycastle/jcajce/provider/symmetric/util/BaseStreamCipher.java +++ /dev/null @@ -1,359 +0,0 @@ -package org.bouncycastle.jcajce.provider.symmetric.util; - -import java.security.AlgorithmParameters; -import java.security.InvalidAlgorithmParameterException; -import java.security.InvalidKeyException; -import java.security.InvalidParameterException; -import java.security.Key; -import java.security.SecureRandom; -import java.security.spec.AlgorithmParameterSpec; - -import javax.crypto.Cipher; -import javax.crypto.NoSuchPaddingException; -import javax.crypto.SecretKey; -import javax.crypto.ShortBufferException; -import javax.crypto.spec.IvParameterSpec; -import javax.crypto.spec.PBEParameterSpec; -import javax.crypto.spec.RC2ParameterSpec; -import javax.crypto.spec.RC5ParameterSpec; - -import org.bouncycastle.crypto.CipherParameters; -import org.bouncycastle.crypto.DataLengthException; -import org.bouncycastle.crypto.StreamCipher; -import org.bouncycastle.crypto.params.KeyParameter; -import org.bouncycastle.crypto.params.ParametersWithIV; -import org.bouncycastle.jce.provider.BouncyCastleProvider; - -public class BaseStreamCipher - extends BaseWrapCipher - implements PBE -{ - // - // specs we can handle. - // - private Class[] availableSpecs = - { - RC2ParameterSpec.class, - RC5ParameterSpec.class, - IvParameterSpec.class, - PBEParameterSpec.class - }; - - private StreamCipher cipher; - private ParametersWithIV ivParam; - - private int ivLength = 0; - - private PBEParameterSpec pbeSpec = null; - private String pbeAlgorithm = null; - - protected BaseStreamCipher( - StreamCipher engine, - int ivLength) - { - cipher = engine; - this.ivLength = ivLength; - } - - protected int engineGetBlockSize() - { - return 0; - } - - protected byte[] engineGetIV() - { - return (ivParam != null) ? ivParam.getIV() : null; - } - - protected int engineGetKeySize( - Key key) - { - return key.getEncoded().length * 8; - } - - protected int engineGetOutputSize( - int inputLen) - { - return inputLen; - } - - protected AlgorithmParameters engineGetParameters() - { - if (engineParams == null) - { - if (pbeSpec != null) - { - try - { - AlgorithmParameters engineParams = AlgorithmParameters.getInstance(pbeAlgorithm, BouncyCastleProvider.PROVIDER_NAME); - engineParams.init(pbeSpec); - - return engineParams; - } - catch (Exception e) - { - return null; - } - } - } - - return engineParams; - } - - /** - * should never be called. - */ - protected void engineSetMode( - String mode) - { - if (!mode.equalsIgnoreCase("ECB")) - { - throw new IllegalArgumentException("can't support mode " + mode); - } - } - - /** - * should never be called. - */ - protected void engineSetPadding( - String padding) - throws NoSuchPaddingException - { - if (!padding.equalsIgnoreCase("NoPadding")) - { - throw new NoSuchPaddingException("Padding " + padding + " unknown."); - } - } - - protected void engineInit( - int opmode, - Key key, - AlgorithmParameterSpec params, - SecureRandom random) - throws InvalidKeyException, InvalidAlgorithmParameterException - { - CipherParameters param; - - this.pbeSpec = null; - this.pbeAlgorithm = null; - - this.engineParams = null; - - // - // basic key check - // - if (!(key instanceof SecretKey)) - { - throw new InvalidKeyException("Key for algorithm " + key.getAlgorithm() + " not suitable for symmetric enryption."); - } - - if (key instanceof BCPBEKey) - { - BCPBEKey k = (BCPBEKey)key; - - if (k.getOID() != null) - { - pbeAlgorithm = k.getOID().getId(); - } - else - { - pbeAlgorithm = k.getAlgorithm(); - } - - if (k.getParam() != null) - { - param = k.getParam(); - pbeSpec = new PBEParameterSpec(k.getSalt(), k.getIterationCount()); - } - else if (params instanceof PBEParameterSpec) - { - param = PBE.Util.makePBEParameters(k, params, cipher.getAlgorithmName()); - pbeSpec = (PBEParameterSpec)params; - } - else - { - throw new InvalidAlgorithmParameterException("PBE requires PBE parameters to be set."); - } - - if (k.getIvSize() != 0) - { - ivParam = (ParametersWithIV)param; - } - } - else if (params == null) - { - param = new KeyParameter(key.getEncoded()); - } - else if (params instanceof IvParameterSpec) - { - param = new ParametersWithIV(new KeyParameter(key.getEncoded()), ((IvParameterSpec)params).getIV()); - ivParam = (ParametersWithIV)param; - } - else - { - throw new InvalidAlgorithmParameterException("unknown parameter type."); - } - - if ((ivLength != 0) && !(param instanceof ParametersWithIV)) - { - SecureRandom ivRandom = random; - - if (ivRandom == null) - { - ivRandom = new SecureRandom(); - } - - if ((opmode == Cipher.ENCRYPT_MODE) || (opmode == Cipher.WRAP_MODE)) - { - byte[] iv = new byte[ivLength]; - - ivRandom.nextBytes(iv); - param = new ParametersWithIV(param, iv); - ivParam = (ParametersWithIV)param; - } - else - { - throw new InvalidAlgorithmParameterException("no IV set when one expected"); - } - } - - try - { - switch (opmode) - { - case Cipher.ENCRYPT_MODE: - case Cipher.WRAP_MODE: - cipher.init(true, param); - break; - case Cipher.DECRYPT_MODE: - case Cipher.UNWRAP_MODE: - cipher.init(false, param); - break; - default: - throw new InvalidParameterException("unknown opmode " + opmode + " passed"); - } - } - catch (Exception e) - { - throw new InvalidKeyException(e.getMessage()); - } - } - - protected void engineInit( - int opmode, - Key key, - AlgorithmParameters params, - SecureRandom random) - throws InvalidKeyException, InvalidAlgorithmParameterException - { - AlgorithmParameterSpec paramSpec = null; - - if (params != null) - { - for (int i = 0; i != availableSpecs.length; i++) - { - try - { - paramSpec = params.getParameterSpec(availableSpecs[i]); - break; - } - catch (Exception e) - { - continue; - } - } - - if (paramSpec == null) - { - throw new InvalidAlgorithmParameterException("can't handle parameter " + params.toString()); - } - } - - engineInit(opmode, key, paramSpec, random); - engineParams = params; - } - - protected void engineInit( - int opmode, - Key key, - SecureRandom random) - throws InvalidKeyException - { - try - { - engineInit(opmode, key, (AlgorithmParameterSpec)null, random); - } - catch (InvalidAlgorithmParameterException e) - { - throw new InvalidKeyException(e.getMessage()); - } - } - - protected byte[] engineUpdate( - byte[] input, - int inputOffset, - int inputLen) - { - byte[] out = new byte[inputLen]; - - cipher.processBytes(input, inputOffset, inputLen, out, 0); - - return out; - } - - protected int engineUpdate( - byte[] input, - int inputOffset, - int inputLen, - byte[] output, - int outputOffset) - throws ShortBufferException - { - try - { - cipher.processBytes(input, inputOffset, inputLen, output, outputOffset); - - return inputLen; - } - catch (DataLengthException e) - { - throw new ShortBufferException(e.getMessage()); - } - } - - protected byte[] engineDoFinal( - byte[] input, - int inputOffset, - int inputLen) - { - if (inputLen != 0) - { - byte[] out = engineUpdate(input, inputOffset, inputLen); - - cipher.reset(); - - return out; - } - - cipher.reset(); - - return new byte[0]; - } - - protected int engineDoFinal( - byte[] input, - int inputOffset, - int inputLen, - byte[] output, - int outputOffset) - { - if (inputLen != 0) - { - cipher.processBytes(input, inputOffset, inputLen, output, outputOffset); - } - - cipher.reset(); - - return inputLen; - } -} |