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Code Issues Releases Wiki Activity

Add documentation to classes related to verification of cleartext signed data

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This commit is contained in:
Paul Schaub 2021-08-14 11:39:13 +02:00
parent 468159b2ad
commit a678ff1b6e
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
4 changed files with 22 additions and 4 deletions
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10
pgpainless-core/src/main/java/org/pgpainless/signature/cleartext_signatures/InMemoryMultiPassStrategy.java
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@ -18,6 +18,14 @@ package org.pgpainless.signature.cleartext_signatures;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
/**
* Implementation of the {@link MultiPassStrategy}.
* This class keeps the read data in memory by caching the data inside a {@link ByteArrayOutputStream}.
*
* Note, that this class is suitable and efficient for processing small amounts of data.
* For larger data like encrypted files, use of the {@link WriteToFileMultiPassStrategy} is recommended to
* prevent {@link OutOfMemoryError OutOfMemoryErrors} and other issues.
*/
public class InMemoryMultiPassStrategy implements MultiPassStrategy {
private final ByteArrayOutputStream cache = new ByteArrayOutputStream();
@ -29,7 +37,7 @@ public class InMemoryMultiPassStrategy implements MultiPassStrategy {
@Override
public ByteArrayInputStream getMessageInputStream() {
return new ByteArrayInputStream(cache.toByteArray());
return new ByteArrayInputStream(getBytes());
}
public byte[] getBytes() {

6
pgpainless-core/src/main/java/org/pgpainless/signature/cleartext_signatures/MultiPassStrategy.java
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@ -22,7 +22,11 @@ import java.io.InputStream;
import java.io.OutputStream;
/**
* Interface that describes a strategy to deal with the fact that detached signatures require multiple passes
* Since the {@link CleartextSignatureProcessor} needs to read the whole data twice in order to verify signatures,
* a strategy for how to cache the read data is required.
* Otherwise large data kept in memory could cause {@link OutOfMemoryError OutOfMemoryErrors} or other issues.
*
* This is an Interface that describes a strategy to deal with the fact that detached signatures require multiple passes
* to do verification.
*
* This interface can be used to write the signed data stream out via {@link #getMessageOutputStream()} and later

3
pgpainless-core/src/main/java/org/pgpainless/signature/cleartext_signatures/VerifyCleartextSignatures.java
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@ -23,6 +23,9 @@ import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPPublicKeyRing;
import org.bouncycastle.openpgp.PGPPublicKeyRingCollection;
/**
* Interface defining the API for verification of cleartext signed documents.
*/
public interface VerifyCleartextSignatures {
/**

7
pgpainless-core/src/main/java/org/pgpainless/signature/cleartext_signatures/WriteToFileMultiPassStrategy.java
View file

@ -23,9 +23,12 @@ import java.io.InputStream;
import java.io.OutputStream;
/**
* File-based multi-pass strategy.
* When processing the signed data the first time, the data is being written out into a file.
* Implementation of the {@link MultiPassStrategy}.
* When processing signed data the first time, the data is being written out into a file.
* For the second pass, that file is being read again.
*
* This strategy is recommended when larger amounts of data need to be processed.
* For smaller files, {@link InMemoryMultiPassStrategy} yields higher efficiency.
*/
public class WriteToFileMultiPassStrategy implements MultiPassStrategy {