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fix rare ElGamal AIOOBE

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zzz
2009-10-09 16:00:38 +00:00
parent da41f3a93b
commit 3c260aa333
3 changed files with 8 additions and 5 deletions
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9
core/java/src/net/i2p/crypto/ElGamalEngine.java
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@@ -181,16 +181,17 @@ public class ElGamalEngine {
for (i = 0; i < val.length; i++)
if (val[i] != (byte) 0x00) break;
//ByteArrayInputStream bais = new ByteArrayInputStream(val, i, val.length - i);
byte hashData[] = new byte[Hash.HASH_LENGTH];
System.arraycopy(val, i + 1, hashData, 0, Hash.HASH_LENGTH);
Hash hash = new Hash(hashData);
int payloadLen = val.length - i - 1 - Hash.HASH_LENGTH;
if (payloadLen < 0) {
if (_log.shouldLog(Log.ERROR))
_log.error("Decrypted data is too small (" + (val.length - i)+ ")");
return null;
}
//ByteArrayInputStream bais = new ByteArrayInputStream(val, i, val.length - i);
byte hashData[] = new byte[Hash.HASH_LENGTH];
System.arraycopy(val, i + 1, hashData, 0, Hash.HASH_LENGTH);
Hash hash = new Hash(hashData);
byte rv[] = new byte[payloadLen];
System.arraycopy(val, i + 1 + Hash.HASH_LENGTH, rv, 0, rv.length);