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TAP5-2008: Implement HMAC signatures on object streams stored on the …
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Howard M. Lewis Ship
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Oct 4, 2012
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86 changes: 86 additions & 0 deletions
86
tapestry-core/src/main/java/org/apache/tapestry5/internal/util/MacOutputStream.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| // Copyright 2012 The Apache Software Foundation | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
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| package org.apache.tapestry5.internal.util; | ||
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| import org.apache.commons.codec.binary.Base64; | ||
| import org.apache.tapestry5.ioc.internal.util.InternalUtils; | ||
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| import javax.crypto.Mac; | ||
| import java.io.IOException; | ||
| import java.io.OutputStream; | ||
| import java.security.Key; | ||
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| /** | ||
| * An output stream that wraps around a {@link Mac} (message authentication code algorithm). This is currently | ||
| * used for symmetric (private) keys, but in theory could be used with assymetric (public/private) keys. | ||
| * | ||
| * @since 5.3.6 | ||
| */ | ||
| public class MacOutputStream extends OutputStream | ||
| { | ||
| private final Mac mac; | ||
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| public static MacOutputStream streamFor(Key key) throws IOException | ||
| { | ||
| try | ||
| { | ||
| Mac mac = Mac.getInstance(key.getAlgorithm()); | ||
| mac.init(key); | ||
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| return new MacOutputStream(mac); | ||
| } catch (Exception ex) | ||
| { | ||
| throw new IOException("Unable to create MacOutputStream: " + InternalUtils.toMessage(ex), ex); | ||
| } | ||
| } | ||
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| public MacOutputStream(Mac mac) | ||
| { | ||
| assert mac != null; | ||
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| this.mac = mac; | ||
| } | ||
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| /** | ||
| * Should only be invoked once, immediately after this stream is closed; it generates the final MAC result, and | ||
| * returns it as a Base64 encoded string. | ||
| * | ||
| * @return Base64 encoded MAC result | ||
| */ | ||
| public String getResult() | ||
| { | ||
| byte[] result = mac.doFinal(); | ||
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| return new String(Base64.encodeBase64(result)); | ||
| } | ||
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| @Override | ||
| public void write(int b) throws IOException | ||
| { | ||
| mac.update((byte) b); | ||
| } | ||
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| @Override | ||
| public void write(byte[] b) throws IOException | ||
| { | ||
| mac.update(b); | ||
| } | ||
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| @Override | ||
| public void write(byte[] b, int off, int len) throws IOException | ||
| { | ||
| mac.update(b, off, len); | ||
| } | ||
| } |
73 changes: 73 additions & 0 deletions
73
tapestry-core/src/main/java/org/apache/tapestry5/internal/util/TeeOutputStream.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| // Copyright 2012 The Apache Software Foundation | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
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| package org.apache.tapestry5.internal.util; | ||
|
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| import java.io.IOException; | ||
| import java.io.OutputStream; | ||
|
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| /** | ||
| * An output stream that acts like a "tee", copying all provided bytes to two output streams. This is used, for example, | ||
| * to accumulate a hash of content even as it is being written. | ||
| * | ||
| * @since 5.3.5 | ||
| */ | ||
| public class TeeOutputStream extends OutputStream | ||
| { | ||
| private final OutputStream left, right; | ||
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| public TeeOutputStream(OutputStream left, OutputStream right) | ||
| { | ||
| assert left != null; | ||
| assert right != null; | ||
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| this.left = left; | ||
| this.right = right; | ||
| } | ||
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| @Override | ||
| public void write(int b) throws IOException | ||
| { | ||
| left.write(b); | ||
| right.write(b); | ||
| } | ||
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| @Override | ||
| public void write(byte[] b) throws IOException | ||
| { | ||
| left.write(b); | ||
| right.write(b); | ||
| } | ||
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| @Override | ||
| public void write(byte[] b, int off, int len) throws IOException | ||
| { | ||
| left.write(b, off, len); | ||
| right.write(b, off, len); | ||
| } | ||
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| @Override | ||
| public void flush() throws IOException | ||
| { | ||
| left.flush(); | ||
| right.flush(); | ||
| } | ||
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| @Override | ||
| public void close() throws IOException | ||
| { | ||
| left.close(); | ||
| right.close(); | ||
| } | ||
| } |
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