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* HMAC:

Browse Source 
- Javadocs and cleanups
      - Use SimpleByteCache
      - Comments and speculation
This commit is contained in:
zzz
2011-06-02 13:37:35 +00:00
parent 2a5ed938bb
commit 761ad38bcc
2 changed files with 109 additions and 36 deletions
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30
core/java/src/org/bouncycastle/crypto/macs/I2PHMac.java
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@@ -27,9 +27,10 @@ package org.bouncycastle.crypto.macs;
*/
//import org.bouncycastle.crypto.CipherParameters;
import java.util.ArrayList;
import java.util.Arrays;
import net.i2p.util.SimpleByteCache;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.Mac;
@@ -65,6 +66,11 @@ implements Mac
{
this(digest, digest.getDigestSize());
}
/**
* @param sz override the digest's size
* SEE NOTES in HMACGenerator about why this isn't compatible with standard HmacMD5
*/
public I2PHMac(
Digest digest, int sz)
{
@@ -165,28 +171,14 @@ implements Mac
return len;
}
/**
* list of buffers - index 0 is the cache for 32 byte arrays, while index 1 is the cache for 16 byte arrays
*/
private static ArrayList _tmpBuf[] = new ArrayList[] { new ArrayList(), new ArrayList() };
private static byte[] acquireTmp(int sz) {
byte rv[] = null;
synchronized (_tmpBuf[sz == 32 ? 0 : 1]) {
if (!_tmpBuf[sz == 32 ? 0 : 1].isEmpty())
rv = (byte[])_tmpBuf[sz == 32 ? 0 : 1].remove(0);
}
if (rv != null)
Arrays.fill(rv, (byte)0x0);
else
rv = new byte[sz];
byte[] rv = SimpleByteCache.acquire(sz);
Arrays.fill(rv, (byte)0x0);
return rv;
}
private static void releaseTmp(byte buf[]) {
if (buf == null) return;
synchronized (_tmpBuf[buf.length == 32 ? 0 : 1]) {
if (_tmpBuf[buf.length == 32 ? 0 : 1].size() < 100)
_tmpBuf[buf.length == 32 ? 0 : 1].add((Object)buf);
}
SimpleByteCache.release(buf);
}
/**