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re PR libgcj/9271 (Severe bias in java.security.SecureRandom)

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2003-02-13  Casey Marshall  <rsdio@metastatic.org>

	PR libgcj/9271:
	* java/security/SecureRandom.java (next): Avoid bias in results.

From-SVN: r62851
This commit is contained in:
Casey Marshall 2003-02-13 17:00:22 +00:00 committed by Tom Tromey
parent 06b5f09133
commit 894c84e4d9
2 changed files with 10 additions and 3 deletions
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5
libjava/ChangeLog
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@ -1,3 +1,8 @@
2003-02-13 Casey Marshall <rsdio@metastatic.org>
PR libgcj/9271:
* java/security/SecureRandom.java (next): Avoid bias in results.
2003-02-13 Michael <konqueror@gmx.de>
* gnu/java/nio/FileChannelImpl.java

8
libjava/java/security/SecureRandom.java
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@ -1,5 +1,5 @@
/* SecureRandom.java --- Secure Random class implmentation
Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GNU Classpath.
@ -36,6 +36,7 @@ obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package java.security;
import java.io.Serializable;
import java.util.Random;
import java.util.Enumeration;
@ -358,9 +359,10 @@ public class SecureRandom extends Random
int ret = 0;
for (int i = 0; i < tmp.length; i++)
ret |= tmp[i] << (8 * i);
ret |= (tmp[i] & 0xFF) << (8 * i);
return ret;
long mask = (1L << numBits) - 1;
return (int) (ret & mask);
}
/**