diff options
Diffstat (limited to 'bcprov/src/main/java/org/bouncycastle/crypto/macs/SkeinMac.java')
-rw-r--r-- | bcprov/src/main/java/org/bouncycastle/crypto/macs/SkeinMac.java | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/crypto/macs/SkeinMac.java b/bcprov/src/main/java/org/bouncycastle/crypto/macs/SkeinMac.java deleted file mode 100644 index 7115b51..0000000 --- a/bcprov/src/main/java/org/bouncycastle/crypto/macs/SkeinMac.java +++ /dev/null @@ -1,118 +0,0 @@ -package org.bouncycastle.crypto.macs; - -import org.bouncycastle.crypto.CipherParameters; -import org.bouncycastle.crypto.Mac; -import org.bouncycastle.crypto.digests.SkeinEngine; -import org.bouncycastle.crypto.engines.ThreefishEngine; -import org.bouncycastle.crypto.params.KeyParameter; -import org.bouncycastle.crypto.params.SkeinParameters; - -/** - * Implementation of the Skein parameterised MAC function in 256, 512 and 1024 bit block sizes, - * based on the {@link ThreefishEngine Threefish} tweakable block cipher. - * <p> - * This is the 1.3 version of Skein defined in the Skein hash function submission to the NIST SHA-3 - * competition in October 2010. - * <p> - * Skein was designed by Niels Ferguson - Stefan Lucks - Bruce Schneier - Doug Whiting - Mihir - * Bellare - Tadayoshi Kohno - Jon Callas - Jesse Walker. - * - * @see SkeinEngine - * @see SkeinParameters - */ -public class SkeinMac - implements Mac -{ - /** - * 256 bit block size - Skein MAC-256 - */ - public static final int SKEIN_256 = SkeinEngine.SKEIN_256; - /** - * 512 bit block size - Skein MAC-512 - */ - public static final int SKEIN_512 = SkeinEngine.SKEIN_512; - /** - * 1024 bit block size - Skein MAC-1024 - */ - public static final int SKEIN_1024 = SkeinEngine.SKEIN_1024; - - private SkeinEngine engine; - - /** - * Constructs a Skein MAC with an internal state size and output size. - * - * @param stateSizeBits the internal state size in bits - one of {@link #SKEIN_256}, {@link #SKEIN_512} or - * {@link #SKEIN_1024}. - * @param digestSizeBits the output/MAC size to produce in bits, which must be an integral number of bytes. - */ - public SkeinMac(int stateSizeBits, int digestSizeBits) - { - this.engine = new SkeinEngine(stateSizeBits, digestSizeBits); - } - - public SkeinMac(SkeinMac mac) - { - this.engine = new SkeinEngine(mac.engine); - } - - public String getAlgorithmName() - { - return "Skein-MAC-" + (engine.getBlockSize() * 8) + "-" + (engine.getOutputSize() * 8); - } - - /** - * Initialises the Skein digest with the provided parameters.<br> - * See {@link SkeinParameters} for details on the parameterisation of the Skein hash function. - * - * @param params an instance of {@link SkeinParameters} or {@link KeyParameter}. - */ - public void init(CipherParameters params) - throws IllegalArgumentException - { - SkeinParameters skeinParameters; - if (params instanceof SkeinParameters) - { - skeinParameters = (SkeinParameters)params; - } - else if (params instanceof KeyParameter) - { - skeinParameters = new SkeinParameters.Builder().setKey(((KeyParameter)params).getKey()).build(); - } - else - { - throw new IllegalArgumentException("Invalid parameter passed to Skein MAC init - " - + params.getClass().getName()); - } - if (skeinParameters.getKey() == null) - { - throw new IllegalArgumentException("Skein MAC requires a key parameter."); - } - engine.init(skeinParameters); - } - - public int getMacSize() - { - return engine.getOutputSize(); - } - - public void reset() - { - engine.reset(); - } - - public void update(byte in) - { - engine.update(in); - } - - public void update(byte[] in, int inOff, int len) - { - engine.update(in, inOff, len); - } - - public int doFinal(byte[] out, int outOff) - { - return engine.doFinal(out, outOff); - } - -} |