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Diffstat (limited to 'libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/digests/ShortenedDigest.java')
-rw-r--r--libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/digests/ShortenedDigest.java80
1 files changed, 0 insertions, 80 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/digests/ShortenedDigest.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/digests/ShortenedDigest.java
deleted file mode 100644
index 274959f56..000000000
--- a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/digests/ShortenedDigest.java
+++ /dev/null
@@ -1,80 +0,0 @@
-package org.spongycastle.crypto.digests;
-
-import org.spongycastle.crypto.ExtendedDigest;
-
-/**
- * Wrapper class that reduces the output length of a particular digest to
- * only the first n bytes of the digest function.
- */
-public class ShortenedDigest
- implements ExtendedDigest
-{
- private ExtendedDigest baseDigest;
- private int length;
-
- /**
- * Base constructor.
- *
- * @param baseDigest underlying digest to use.
- * @param length length in bytes of the output of doFinal.
- * @exception IllegalArgumentException if baseDigest is null, or length is greater than baseDigest.getDigestSize().
- */
- public ShortenedDigest(
- ExtendedDigest baseDigest,
- int length)
- {
- if (baseDigest == null)
- {
- throw new IllegalArgumentException("baseDigest must not be null");
- }
-
- if (length > baseDigest.getDigestSize())
- {
- throw new IllegalArgumentException("baseDigest output not large enough to support length");
- }
-
- this.baseDigest = baseDigest;
- this.length = length;
- }
-
- public String getAlgorithmName()
- {
- return baseDigest.getAlgorithmName() + "(" + length * 8 + ")";
- }
-
- public int getDigestSize()
- {
- return length;
- }
-
- public void update(byte in)
- {
- baseDigest.update(in);
- }
-
- public void update(byte[] in, int inOff, int len)
- {
- baseDigest.update(in, inOff, len);
- }
-
- public int doFinal(byte[] out, int outOff)
- {
- byte[] tmp = new byte[baseDigest.getDigestSize()];
-
- baseDigest.doFinal(tmp, 0);
-
- System.arraycopy(tmp, 0, out, outOff, length);
-
- return length;
- }
-
- public void reset()
- {
- baseDigest.reset();
- }
-
- public int getByteLength()
- {
- return baseDigest.getByteLength();
- }
-}