PGPainless/pgpainless
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Code Issues Releases Wiki Activity

Check key flags on binding sig to determine if backsig is required

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This commit is contained in:
Paul Schaub 2021-07-31 22:25:55 +02:00
parent e7ed0f76a3
commit 5422468d73
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
1 changed files with 11 additions and 0 deletions
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pgpainless-core/src/main/java/org/pgpainless/signature/SignatureValidator.java
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@ -24,6 +24,7 @@ import java.util.List;
import java.util.Map; import java.util.Map;
import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentHashMap;
import org.bouncycastle.bcpg.sig.KeyFlags;
import org.bouncycastle.bcpg.sig.NotationData; import org.bouncycastle.bcpg.sig.NotationData;
import org.bouncycastle.bcpg.sig.SignatureCreationTime; import org.bouncycastle.bcpg.sig.SignatureCreationTime;
import org.bouncycastle.openpgp.PGPException; import org.bouncycastle.openpgp.PGPException;
@ -33,6 +34,7 @@ import org.bouncycastle.openpgp.PGPSignatureList;
import org.bouncycastle.openpgp.PGPSignatureSubpacketVector; import org.bouncycastle.openpgp.PGPSignatureSubpacketVector;
import org.bouncycastle.openpgp.PGPUserAttributeSubpacketVector; import org.bouncycastle.openpgp.PGPUserAttributeSubpacketVector;
import org.pgpainless.algorithm.HashAlgorithm; import org.pgpainless.algorithm.HashAlgorithm;
import org.pgpainless.algorithm.KeyFlag;
import org.pgpainless.algorithm.PublicKeyAlgorithm; import org.pgpainless.algorithm.PublicKeyAlgorithm;
import org.pgpainless.algorithm.SignatureSubpacket; import org.pgpainless.algorithm.SignatureSubpacket;
import org.pgpainless.algorithm.SignatureType; import org.pgpainless.algorithm.SignatureType;
@ -493,6 +495,15 @@ public abstract class SignatureValidator {
return; return;
} }
KeyFlags keyFlags = SignatureSubpacketsUtil.getKeyFlags(signature);
if (keyFlags == null) {
return;
}
if (!KeyFlag.hasKeyFlag(keyFlags.getFlags(), KeyFlag.SIGN_DATA)
&& !KeyFlag.hasKeyFlag(keyFlags.getFlags(), KeyFlag.CERTIFY_OTHER)) {
return;
}
try { try {
PGPSignatureList embeddedSignatures = SignatureSubpacketsUtil.getEmbeddedSignature(signature); PGPSignatureList embeddedSignatures = SignatureSubpacketsUtil.getEmbeddedSignature(signature);
boolean hasValidPrimaryKeyBinding = false; boolean hasValidPrimaryKeyBinding = false;