diff options
Diffstat (limited to 'src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dh/IESCipher.java')
| -rw-r--r-- | src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dh/IESCipher.java | 234 |
1 files changed, 118 insertions, 116 deletions
diff --git a/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dh/IESCipher.java b/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dh/IESCipher.java index 4df65812..c29ff2dc 100644 --- a/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dh/IESCipher.java +++ b/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dh/IESCipher.java @@ -53,14 +53,14 @@ import org.bouncycastle.util.Strings; public class IESCipher extends CipherSpi { - private IESEngine engine; - private int state = -1; - private ByteArrayOutputStream buffer = new ByteArrayOutputStream(); - private AlgorithmParameters engineParam = null; - private IESParameterSpec engineSpec = null; - private AsymmetricKeyParameter key; - private SecureRandom random; - private boolean dhaesMode = false; + private IESEngine engine; + private int state = -1; + private ByteArrayOutputStream buffer = new ByteArrayOutputStream(); + private AlgorithmParameters engineParam = null; + private IESParameterSpec engineSpec = null; + private AsymmetricKeyParameter key; + private SecureRandom random; + private boolean dhaesMode = false; private AsymmetricKeyParameter otherKeyParameter = null; public IESCipher(IESEngine engine) @@ -69,24 +69,24 @@ public class IESCipher } - public int engineGetBlockSize() + public int engineGetBlockSize() { if (engine.getCipher() != null) { return engine.getCipher().getBlockSize(); } - else + else { return 0; } } - public int engineGetKeySize(Key key) + public int engineGetKeySize(Key key) { if (key instanceof DHKey) { - return ((DHKey) key).getParams().getP().bitLength(); + return ((DHKey)key).getParams().getP().bitLength(); } else { @@ -95,22 +95,24 @@ public class IESCipher } - public byte[] engineGetIV() + public byte[] engineGetIV() { return null; } - public AlgorithmParameters engineGetParameters() + public AlgorithmParameters engineGetParameters() { if (engineParam == null && engineSpec != null) - try { + try + { engineParam = AlgorithmParameters.getInstance("IES", BouncyCastleProvider.PROVIDER_NAME); engineParam.init(engineSpec); - } - catch (Exception e) - { - throw new RuntimeException(e.toString()); + } + catch (Exception e) + { + throw new RuntimeException(e.toString()); + } } return engineParam; @@ -118,33 +120,33 @@ public class IESCipher public void engineSetMode(String mode) - throws NoSuchAlgorithmException - { - String modeName = Strings.toUpperCase(mode); + throws NoSuchAlgorithmException + { + String modeName = Strings.toUpperCase(mode); - if (modeName.equals("NONE")) - { + if (modeName.equals("NONE")) + { dhaesMode = false; - } - else if (modeName.equals("DHAES")) - { - dhaesMode = true; - } - else - { - throw new IllegalArgumentException("can't support mode " + mode); - } - } - - public int engineGetOutputSize(int inputLen) - { + } + else if (modeName.equals("DHAES")) + { + dhaesMode = true; + } + else + { + throw new IllegalArgumentException("can't support mode " + mode); + } + } + + public int engineGetOutputSize(int inputLen) + { int len1, len2, len3; len1 = engine.getMac().getMacSize(); if (key != null) { - len2 = ((DHKey) key).getParams().getP().bitLength()/8+1; + len2 = ((DHKey)key).getParams().getP().bitLength() / 8 + 1; } else { @@ -161,7 +163,7 @@ public class IESCipher } else if (state == Cipher.DECRYPT_MODE || state == Cipher.UNWRAP_MODE) { - len3 = engine.getCipher().getOutputSize(inputLen - len1 -len2); + len3 = engine.getCipher().getOutputSize(inputLen - len1 - len2); } else { @@ -184,41 +186,41 @@ public class IESCipher } public void engineSetPadding(String padding) - throws NoSuchPaddingException - { - String paddingName = Strings.toUpperCase(padding); + throws NoSuchPaddingException + { + String paddingName = Strings.toUpperCase(padding); - // TDOD: make this meaningful... - if (paddingName.equals("NOPADDING")) - { + // TDOD: make this meaningful... + if (paddingName.equals("NOPADDING")) + { - } - else if (paddingName.equals("PKCS5PADDING") || paddingName.equals("PKCS7PADDING")) - { + } + else if (paddingName.equals("PKCS5PADDING") || paddingName.equals("PKCS7PADDING")) + { - } - else - { - throw new NoSuchPaddingException("padding not available with IESCipher"); - } - } + } + else + { + throw new NoSuchPaddingException("padding not available with IESCipher"); + } + } // Initialisation methods - + public void engineInit( - int opmode, - Key key, - AlgorithmParameters params, - SecureRandom random) - throws InvalidKeyException, InvalidAlgorithmParameterException + int opmode, + Key key, + AlgorithmParameters params, + SecureRandom random) + throws InvalidKeyException, InvalidAlgorithmParameterException { - AlgorithmParameterSpec paramSpec = null; + AlgorithmParameterSpec paramSpec = null; if (params != null) { try { - paramSpec = params.getParameterSpec(IESParameterSpec.class); + paramSpec = params.getParameterSpec(IESParameterSpec.class); } catch (Exception e) { @@ -226,17 +228,17 @@ public class IESCipher } } - engineParam = params; + engineParam = params; engineInit(opmode, key, paramSpec, random); } - + public void engineInit( - int opmode, - Key key, - AlgorithmParameterSpec engineSpec, - SecureRandom random) - throws InvalidAlgorithmParameterException, InvalidKeyException + int opmode, + Key key, + AlgorithmParameterSpec engineSpec, + SecureRandom random) + throws InvalidAlgorithmParameterException, InvalidKeyException { // Use default parameters (including cipher key size) if none are specified if (engineSpec == null) @@ -247,7 +249,7 @@ public class IESCipher { this.engineSpec = (IESParameterSpec)engineSpec; } - else + else { throw new InvalidAlgorithmParameterException("must be passed IES parameters"); } @@ -257,7 +259,7 @@ public class IESCipher { if (key instanceof DHPublicKey) { - this.key = DHUtil.generatePublicKeyParameter((PublicKey) key); + this.key = DHUtil.generatePublicKeyParameter((PublicKey)key); } else if (key instanceof IESKey) { @@ -275,7 +277,7 @@ public class IESCipher { if (key instanceof DHPrivateKey) { - this.key = DHUtil.generatePrivateKeyParameter((PrivateKey) key); + this.key = DHUtil.generatePrivateKeyParameter((PrivateKey)key); } else if (key instanceof IESKey) { @@ -291,7 +293,7 @@ public class IESCipher } else { - throw new InvalidKeyException("must be passed EC key"); + throw new InvalidKeyException("must be passed EC key"); } this.random = random; @@ -302,14 +304,14 @@ public class IESCipher public void engineInit( - int opmode, - Key key, - SecureRandom random) - throws InvalidKeyException - { + int opmode, + Key key, + SecureRandom random) + throws InvalidKeyException + { try { - engineInit(opmode, key, (AlgorithmParameterSpec) null, random); + engineInit(opmode, key, (AlgorithmParameterSpec)null, random); } catch (InvalidAlgorithmParameterException e) { @@ -318,13 +320,13 @@ public class IESCipher } - + // Update methods - buffer the input public byte[] engineUpdate( - byte[] input, - int inputOffset, - int inputLen) + byte[] input, + int inputOffset, + int inputLen) { buffer.write(input, inputOffset, inputLen); return null; @@ -332,11 +334,11 @@ public class IESCipher public int engineUpdate( - byte[] input, - int inputOffset, - int inputLen, - byte[] output, - int outputOffset) + byte[] input, + int inputOffset, + int inputLen, + byte[] output, + int outputOffset) { buffer.write(input, inputOffset, inputLen); return 0; @@ -344,12 +346,12 @@ public class IESCipher // Finalisation methods - + public byte[] engineDoFinal( - byte[] input, - int inputOffset, - int inputLen) - throws IllegalBlockSizeException, BadPaddingException + byte[] input, + int inputOffset, + int inputLen) + throws IllegalBlockSizeException, BadPaddingException { if (inputLen != 0) { @@ -361,11 +363,11 @@ public class IESCipher // Convert parameters for use in IESEngine IESParameters params = new IESWithCipherParameters(engineSpec.getDerivationV(), - engineSpec.getEncodingV(), - engineSpec.getMacKeySize(), - engineSpec.getCipherKeySize()); + engineSpec.getEncodingV(), + engineSpec.getMacKeySize(), + engineSpec.getCipherKeySize()); - DHParameters dhParams = ((DHKeyParameters) key).getParameters(); + DHParameters dhParams = ((DHKeyParameters)key).getParameters(); byte[] V; if (otherKeyParameter != null) @@ -435,7 +437,7 @@ public class IESCipher return engine.processBlock(in, 0, in.length); } - catch(InvalidCipherTextException e) + catch (InvalidCipherTextException e) { throw new BadPaddingException(e.getMessage()); } @@ -449,12 +451,12 @@ public class IESCipher public int engineDoFinal( - byte[] input, - int inputOffset, - int inputLength, - byte[] output, - int outputOffset) - throws ShortBufferException, IllegalBlockSizeException, BadPaddingException + byte[] input, + int inputOffset, + int inputLength, + byte[] output, + int outputOffset) + throws ShortBufferException, IllegalBlockSizeException, BadPaddingException { byte[] buf = engineDoFinal(input, inputOffset, inputLength); @@ -469,13 +471,13 @@ public class IESCipher */ static public class IES - extends IESCipher + extends IESCipher { public IES() { - super(new IESEngine(new DHBasicAgreement(), - new KDF2BytesGenerator(new SHA1Digest()), - new HMac(new SHA1Digest()))); + super(new IESEngine(new DHBasicAgreement(), + new KDF2BytesGenerator(new SHA1Digest()), + new HMac(new SHA1Digest()))); } } @@ -485,21 +487,21 @@ public class IESCipher public IESwithDESede() { super(new IESEngine(new DHBasicAgreement(), - new KDF2BytesGenerator(new SHA1Digest()), - new HMac(new SHA1Digest()), - new PaddedBufferedBlockCipher(new DESedeEngine()))); + new KDF2BytesGenerator(new SHA1Digest()), + new HMac(new SHA1Digest()), + new PaddedBufferedBlockCipher(new DESedeEngine()))); } } static public class IESwithAES - extends IESCipher + extends IESCipher { public IESwithAES() { - super(new IESEngine(new DHBasicAgreement(), - new KDF2BytesGenerator(new SHA1Digest()), - new HMac(new SHA1Digest()), - new PaddedBufferedBlockCipher(new AESEngine()))); + super(new IESEngine(new DHBasicAgreement(), + new KDF2BytesGenerator(new SHA1Digest()), + new HMac(new SHA1Digest()), + new PaddedBufferedBlockCipher(new AESEngine()))); } } } |