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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/javax/net/ssl/provider/SSLHMac.java | |
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Diffstat (limited to 'libjava/classpath/gnu/javax/net/ssl/provider/SSLHMac.java')
-rw-r--r-- | libjava/classpath/gnu/javax/net/ssl/provider/SSLHMac.java | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/net/ssl/provider/SSLHMac.java b/libjava/classpath/gnu/javax/net/ssl/provider/SSLHMac.java new file mode 100644 index 000000000..002b3077f --- /dev/null +++ b/libjava/classpath/gnu/javax/net/ssl/provider/SSLHMac.java @@ -0,0 +1,158 @@ +/* SSLHMac.java -- SSLv3's MAC algorithm. + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is a part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or (at +your option) any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 +USA + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.javax.net.ssl.provider; + +import java.util.Arrays; +import java.util.Map; + +import gnu.java.security.hash.HashFactory; +import gnu.java.security.hash.IMessageDigest; +import gnu.javax.crypto.mac.IMac; + +/** + * The MAC function in SSLv3. This mac is defined as: + * + * <pre> + * hash(MAC_write_secret, pad_2 + + * hash(MAC_write_secret + pad_1 + data));</pre> + * + * <p><tt>hash</tt> is e.g. MD5 or SHA-1, <tt>pad_1</tt> is the value + * 0x36 48 times for MD5 and 40 times for SHA-1, and <tt>pad_2</tt> is + * the value 0x5c repeated similarly. + */ +class SSLHMac implements IMac, Cloneable +{ + + // Fields. + // ------------------------------------------------------------------------- + + static final byte PAD1 = 0x36; + static final byte PAD2 = 0x5c; + + protected IMessageDigest md; + protected byte[] key; + protected final byte[] pad1, pad2; + + // Constructors. + // ------------------------------------------------------------------------- + + SSLHMac(String mdName) + { + super(); + this.md = HashFactory.getInstance(mdName); + if (mdName.equalsIgnoreCase("MD5")) + { + pad1 = new byte[48]; + pad2 = new byte[48]; + } + else + { + pad1 = new byte[40]; + pad2 = new byte[40]; + } + Arrays.fill(pad1, PAD1); + Arrays.fill(pad2, PAD2); + } + + // Instance methods. + // ------------------------------------------------------------------------- + + public Object clone() + { + try + { + return super.clone(); + } + catch (CloneNotSupportedException cnse) + { + throw new Error(); + } + } + + public String name() + { + return "SSLHMac-" + md.name(); + } + + public int macSize() + { + return md.hashSize(); + } + + public void init(Map attributes) + { + key = (byte[]) attributes.get(MAC_KEY_MATERIAL); + if (key == null) + throw new NullPointerException(); + reset(); + } + + public void reset() + { + md.reset(); + md.update(key, 0, key.length); + md.update(pad1, 0, pad1.length); + } + + public byte[] digest() + { + byte[] h1 = md.digest(); + md.update(key, 0, key.length); + md.update(pad2, 0, pad2.length); + md.update(h1, 0, h1.length); + byte[] result = md.digest(); + reset(); + return result; + } + + public void update(byte b) + { + md.update(b); + } + + public void update(byte[] buf, int off, int len) + { + md.update(buf, off, len); + } + + public boolean selfTest() + { + return true; // XXX + } +} |