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Add test to ensure PGPainless will refuse to decrypt message with incapable key

This commit is contained in:
Paul Schaub 2021-12-13 12:43:08 +01:00
parent 80e12db8b6
commit 5108b81252
Signed by: vanitasvitae
GPG Key ID: 62BEE9264BF17311
2 changed files with 204 additions and 2 deletions
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4
pgpainless-core/src/main/java/org/pgpainless/decryption_verification/DecryptionStreamFactory.java
View File

@ -407,9 +407,9 @@ public final class DecryptionStreamFactory {
if (secretKey == null) {
LOGGER.debug("Key " + Long.toHexString(keyId) + " is not valid or not capable for decryption.");
} else {
privateKey = tryPublicKeyDecryption(secretKeys, secretKey, publicKeyEncryptedData, postponedDueToMissingPassphrase, true);
}
privateKey = tryPublicKeyDecryption(secretKeys, secretKey, publicKeyEncryptedData, postponedDueToMissingPassphrase, true);
}
if (privateKey == null) {
continue;

202
pgpainless-core/src/test/java/org/pgpainless/decryption_verification/PreventDecryptionUsingNonEncryptionKeyTest.java Normal file
View File

@ -0,0 +1,202 @@
// SPDX-FileCopyrightText: 2021 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.decryption_verification;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPSecretKeyRing;
import org.bouncycastle.util.io.Streams;
import org.junit.jupiter.api.Test;
import org.pgpainless.PGPainless;
import org.pgpainless.exception.MissingDecryptionMethodException;
import org.pgpainless.key.SubkeyIdentifier;
public class PreventDecryptionUsingNonEncryptionKeyTest {
private static final String ENCRYPTION_CAPABLE_KEY = "-----BEGIN PGP PRIVATE KEY BLOCK-----\n" +
"Version: PGPainless\n" +
"Comment: 1E9C 0357 913E 797A E3EF 5D15 E683 CE77 5D98 8147\n" +
"Comment: Alice <alice@pgpainless.org>\n" +
"\n" +
"lQcYBGG3LpQBEADL6KpZqK4hVU49g7xDxalj2Nuf5rtVHmof2qcYHulPjchveUHN\n" +
"+mHuRiyCZIZ0tlURMEvq4hQmQTxvEVkQumH5mvnpOMR0hWOM7WYZGp+X8frqzT0t\n" +
"S2HE/PVYfN8P3W2HGarX9ihy+oqSTdmxSBTGPEHuOKeAazgL2oOPzA+dtOOVxbxC\n" +
"YyK5r3X/Ut5rJk84OdXNRTjxqiLUneXTBnJc9HP1FpUCpBjkvgJpT9o8Ixe5OMSP\n" +
"J+ubwscPBA5AaWXAPT0HKBo7LSgOxCIKq/QcP+YnZhsVfoUrzs4YiCUlY5U3yWt+\n" +
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"Dojk4pt3HBlrc+AUCzqnEmary5T/RchrZ8ynod9uh3P4jyOiEGS2zui66ghJ1Iqg\n" +
"N1QVex+eyRDU4wxQQvUEX4uzmjta6VtVa1vCVi0i4N3Ntt49yi38L4V32m0duzVf\n" +
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"9x5YfH1Xg/PUSOb1viiNDwh0I9yQme3xybbSB8lMDjzGx4RY4+CCQSKwvaiCI7QT\n" +
"+A8MZoPZNImQtPcyJLRnY2NKVs4OoCq6lC4H5JNbk0Yu2Vzm8j/jkIxBlD7YOIXh\n" +
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"gUcWoQQenANXkT55euPvXRXmg853XZiBRwKeAQKbBwWWAgMBAASLCQgHBZUKCQgL\n" +
"ApkBAAAdOA/9F4H5t1QtDhtlICCAunvNXhCCALeO9sS6p3ChBcxitTVeqrjTpS/3\n" +
"UvIDeTgswFSX4isxM27bN/ee/WdNhFIM/sNxrx6C1hdeaOskYPr6CLrzFyety4Mu\n" +
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"O4Zo217qnAx3DgeUU9D+Bw9MByHK+rjuSCiHySfvEQNXQZroMAf8/oLrtviIm/aa\n" +
"qoOsnIavkPJz+ScnMXeSiZkuPsBNys1S5XHBIP9BtKO6/UgVE/Lla//7j2Y42859\n" +
"AL+v4mswCtCW4pIYTxkJjvz7eFEDWoanLutvk3wwcNCds8+vx9RYXN0T3x+l8C6F\n" +
"AW1Mppg0oblEDw9X4wwL1pwaE29AwDLQRy0a93sqe5qePXiC3Hp3ln19ReR0+trm\n" +
"PMvuQHTsrp+Q4WsVDKIhXONGE6Zcq2jE9w5GJDR98ASGq/b8KVjmZwslh0N6KBra\n" +
"bFTBNvQAwKiHynOzFDgxBuZ1RqUKsuJS22ddkdDa1bcGJs2e0PucBsRbH+GJc9Xh\n" +
"VIBeDZV/7BVRxsifv1CXYAQF0bwSWROzRV9zf8l4Nfouk2kJ/3TEpMY=\n" +
"=JH2v\n" +
"-----END PGP PRIVATE KEY BLOCK-----";
// same key, but with crippling self-signature with flags [C,S]
private static final String ENCRYPTION_INCAPABLE_KEY = "-----BEGIN PGP PRIVATE KEY BLOCK-----\n" +
"Version: PGPainless\n" +
"Comment: 1E9C 0357 913E 797A E3EF 5D15 E683 CE77 5D98 8147\n" +
"Comment: Alice <alice@pgpainless.org>\n" +
"\n" +
"lQcYBGG3LpQBEADL6KpZqK4hVU49g7xDxalj2Nuf5rtVHmof2qcYHulPjchveUHN\n" +
"+mHuRiyCZIZ0tlURMEvq4hQmQTxvEVkQumH5mvnpOMR0hWOM7WYZGp+X8frqzT0t\n" +
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"+e00UHaJSxWeqlgEEc6ytf5V7VVDX59fgMdMndORh0VQgHnFbpmHj0/N5hb+wFfo\n" +
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"KGX+a1aXgrr2+e4DjjMChdyRUHiM1IH4KsHQ3ws/lrIB3Th2a25FAXwnFs03P0Xb\n" +
"XDyl0pBH/+tzdhOugfZdA1GM16H6nT1BPzn8wk9sfQvbYk1LopioI7PVIhjjbo1g\n" +
"rgFt6v9IEaRjfhWaOuFQ2PoYe/Nl0d2P69Wig718s7aW4cgkt5l63yu/QbBcSCTo\n" +
"CTDqlR8Fz93E3h1v4mS6Y+yIJ1Pz8rv7HEH0o2WALMSKuPlSSBaQdimYPOlYTmxO\n" +
"9lrdXMxTWQggiAvljzjwute5HT+1770gNuNtjbUgzyw4T/bLGTQms4dSG1FOyO4w\n" +
"OYuyD/09bAeas99DDPR8MYj8g1xjPTwUo50kNw1p6oO8TXEItvK2xrQSc69qNbX4\n" +
"k2tRC7ef/aGaJerzGXr8j5TPU0+qaudTF0if5oGbz2/fyg9JeLmV5yXa86o83KxR\n" +
"EapO9b+UW46R5USUhqi9OAxN3I3SsuR60/3F1nyli4PZKGwBH3ZIjSrW4JaeUWsB\n" +
"+f9VJKhwtshcue+FxtZVEczrlZrQxuICJTUt84gvtXz22ZGNhXTBNCMsO0UPSEj9\n" +
"fxRW1IcRfQYnmmaJLDOMuiFynX49Ck3UzXsc4OjUGapAFGMEbL5yyJUoq8tHM+XG\n" +
"sqSmGpGc\n" +
"=3NqQ\n" +
"-----END PGP PRIVATE KEY BLOCK-----\n";
private static final String MSG = "-----BEGIN PGP MESSAGE-----\n" +
"Version: PGPainless\n" +
"\n" +
"hQIMA+aDznddmIFHAQ//X9ML2+fboZEJZpw/p2WD7k9SREZ24KdJtdUif98pEoFw\n" +
"yQB5CC2s2gBENJ+2N7UV1esU/oW7Bs+RSvNKl4eIyrH/Tz3ijVd/mcGYcKOxejW8\n" +
"4ES5BWdRj0+9/CV3AGwAKb3g3D39tbiWqh0CH+2Ayq9O8MQo4/zE+fKSjFdfPD/y\n" +
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"CtiTojpMRSbTOCjdFCcYR/scU+eyqDcZ096EgfBQitj4ALUYOFkILBS9M+Lh3xIz\n" +
"rv3+z0kmRHyKn8kcmTEoqyqkZfuEMOY6gK+hD9garBJ/91tN8ul4uHax7CMwqN8/\n" +
"yKWoATEU7ZHMe7jF6jS5pK8ET8IP2yVfZOhGZW8mcMrUMiF7LG1HepK5p7UMkmbX\n" +
"GHkU3vEU429PL4NXDnuLufObqZBg5zSdIzo/LXtvLKXaHUv0am1JW2wQD8hAUJAt\n" +
"Uz+NFncS+a8bbsu1wNRjAr6Rg/5VHEk/5h+zuZP8UkCQp5NID26oVvnfDkTXAZ1+\n" +
"egh7coZ4a2IqEVBDWnkAXssxGBxVwGDr14oNC1SaABWzqPxaY0yVrpZcr30ghqPS\n" +
"PwHcN1NCaMtJDH4ThxH5L6zHboQeX2R6x9vpWLu9FDFqEDilxHtw+7Lax4yralGC\n" +
"q3K54WgyYD2Q2tzMXOTEwg==\n" +
"=+Ttf\n" +
"-----END PGP MESSAGE-----";
@Test
public void baseCase() throws PGPException, IOException {
PGPSecretKeyRing secretKeys = PGPainless.readKeyRing().secretKeyRing(ENCRYPTION_CAPABLE_KEY);
ByteArrayInputStream msgIn = new ByteArrayInputStream(MSG.getBytes(StandardCharsets.UTF_8));
DecryptionStream decryptionStream = PGPainless.decryptAndOrVerify()
.onInputStream(msgIn)
.withOptions(new ConsumerOptions().addDecryptionKey(secretKeys));
Streams.drain(decryptionStream);
decryptionStream.close();
OpenPgpMetadata metadata = decryptionStream.getResult();
assertEquals(metadata.getDecryptionKey(), new SubkeyIdentifier(secretKeys, secretKeys.getPublicKey().getKeyID()));
}
@Test
public void nonEncryptionKeyCannotDecrypt() throws IOException {
PGPSecretKeyRing secretKeys = PGPainless.readKeyRing().secretKeyRing(ENCRYPTION_INCAPABLE_KEY);
ByteArrayInputStream msgIn = new ByteArrayInputStream(MSG.getBytes(StandardCharsets.UTF_8));
assertThrows(MissingDecryptionMethodException.class, () ->
PGPainless.decryptAndOrVerify()
.onInputStream(msgIn)
.withOptions(new ConsumerOptions().addDecryptionKey(secretKeys)));
}
}