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8044659: Java SecureRandom on SPARC T4 much slower than on x86/Linux

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Reviewed-by: mullan
This commit is contained in:
Bradford Wetmore 2014-07-24 22:22:43 +01:00 committed by Rob McKenna
parent ab68202313
commit 6a2504398e
1 changed files with 28 additions and 7 deletions

35
jdk/src/share/classes/sun/security/provider/SecureRandom.java

@ -1,5 +1,5 @@
/*
* Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -29,6 +29,7 @@ import java.io.IOException;
import java.security.MessageDigest;
import java.security.SecureRandomSpi;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
/**
* <p>This class provides a crytpographically strong pseudo-random number
@ -94,9 +95,19 @@ implements java.io.Serializable {
*/
private void init(byte[] seed) {
try {
digest = MessageDigest.getInstance("SHA");
} catch (NoSuchAlgorithmException e) {
throw new InternalError("internal error: SHA-1 not available.", e);
/*
* Use the local SUN implementation to avoid native
* performance overhead.
*/
digest = MessageDigest.getInstance("SHA", "SUN");
} catch (NoSuchProviderException | NoSuchAlgorithmException e) {
// Fallback to any available.
try {
digest = MessageDigest.getInstance("SHA");
} catch (NoSuchAlgorithmException exc) {
throw new InternalError(
"internal error: SHA-1 not available.", exc);
}
}
if (seed != null) {
@ -265,9 +276,19 @@ implements java.io.Serializable {
s.defaultReadObject ();
try {
digest = MessageDigest.getInstance("SHA");
} catch (NoSuchAlgorithmException e) {
throw new InternalError("internal error: SHA-1 not available.", e);
/*
* Use the local SUN implementation to avoid native
* performance overhead.
*/
digest = MessageDigest.getInstance("SHA", "SUN");
} catch (NoSuchProviderException | NoSuchAlgorithmException e) {
// Fallback to any available.
try {
digest = MessageDigest.getInstance("SHA");
} catch (NoSuchAlgorithmException exc) {
throw new InternalError(
"internal error: SHA-1 not available.", exc);
}
}
}
}