mirror of
https://github.com/moparisthebest/open-keychain
synced 2024-11-23 17:22:16 -05:00
remove obsolete subkey binding check from signature verification
This commit is contained in:
Vincent Breitmoser
parent
0db425b289
commit
b40b429bc0
@ -35,7 +35,6 @@ public class OpenPgpSignatureResultBuilder {
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private boolean mSignatureAvailable = false;
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private boolean mKnownKey = false;
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private boolean mValidSignature = false;
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private boolean mValidKeyBinding = false;
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private boolean mIsSignatureKeyCertified = false;
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public void signatureOnly(boolean signatureOnly) {
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@ -58,10 +57,6 @@ public class OpenPgpSignatureResultBuilder {
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this.mValidSignature = validSignature;
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}
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public void validKeyBinding(boolean validKeyBinding) {
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this.mValidKeyBinding = validKeyBinding;
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}
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public void signatureKeyCertified(boolean isSignatureKeyCertified) {
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this.mIsSignatureKeyCertified = isSignatureKeyCertified;
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}
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@ -77,7 +72,7 @@ public class OpenPgpSignatureResultBuilder {
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// valid sig!
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if (mKnownKey) {
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if (mValidKeyBinding && mValidSignature) {
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if (mValidSignature) {
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result.setKeyId(mKeyId);
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result.setUserId(mUserId);
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@ -89,8 +84,7 @@ public class OpenPgpSignatureResultBuilder {
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result.setStatus(OpenPgpSignatureResult.SIGNATURE_SUCCESS_UNCERTIFIED);
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}
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} else {
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Log.d(Constants.TAG, "Error!\nvalidKeyBinding: " + mValidKeyBinding
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+ "\nvalidSignature: " + mValidSignature);
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Log.d(Constants.TAG, "Error! Invalid signature.");
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result.setStatus(OpenPgpSignatureResult.SIGNATURE_ERROR);
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}
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} else {
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@ -122,9 +122,6 @@ public class PgpDecryptVerify {
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/**
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* Allow these key ids alone for decryption.
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* This means only ciphertexts encrypted for one of these private key can be decrypted.
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*
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* @param allowedKeyIds
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* @return
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*/
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public Builder setAllowedKeyIds(Set<Long> allowedKeyIds) {
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this.mAllowedKeyIds = allowedKeyIds;
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@ -496,10 +493,7 @@ public class PgpDecryptVerify {
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// Verify signature and check binding signatures
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boolean validSignature = signature.verify(messageSignature);
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boolean validKeyBinding = signingRing.verifySubkeyBinding(signingKey);
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signatureResultBuilder.validSignature(validSignature);
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signatureResultBuilder.validKeyBinding(validKeyBinding);
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}
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}
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@ -643,10 +637,8 @@ public class PgpDecryptVerify {
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// Verify signature and check binding signatures
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boolean validSignature = signature.verify();
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boolean validKeyBinding = signingRing.verifySubkeyBinding(signingKey);
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signatureResultBuilder.validSignature(validSignature);
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signatureResultBuilder.validKeyBinding(validKeyBinding);
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}
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result.setSignatureResult(signatureResultBuilder.build());
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@ -657,10 +649,6 @@ public class PgpDecryptVerify {
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/**
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* Mostly taken from ClearSignedFileProcessor in Bouncy Castle
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*
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* @param sig
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* @param line
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* @throws SignatureException
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*/
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private static void processLine(PGPSignature sig, byte[] line)
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throws SignatureException {
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@ -1,24 +1,16 @@
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package org.sufficientlysecure.keychain.pgp;
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import org.spongycastle.bcpg.ArmoredOutputStream;
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import org.spongycastle.bcpg.SignatureSubpacketTags;
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import org.spongycastle.openpgp.PGPException;
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import org.spongycastle.openpgp.PGPKeyRing;
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import org.spongycastle.openpgp.PGPObjectFactory;
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import org.spongycastle.openpgp.PGPPublicKey;
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import org.spongycastle.openpgp.PGPPublicKeyRing;
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import org.spongycastle.openpgp.PGPSignature;
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import org.spongycastle.openpgp.PGPSignatureList;
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import org.spongycastle.openpgp.PGPSignatureSubpacketVector;
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import org.spongycastle.openpgp.operator.jcajce.JcaPGPContentVerifierBuilderProvider;
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import org.sufficientlysecure.keychain.Constants;
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import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
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import org.sufficientlysecure.keychain.util.IterableIterator;
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import org.sufficientlysecure.keychain.util.Log;
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import java.io.IOException;
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import java.security.SignatureException;
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import java.util.Arrays;
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import java.util.Iterator;
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public class WrappedPublicKeyRing extends WrappedKeyRing {
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@ -70,106 +62,11 @@ public class WrappedPublicKeyRing extends WrappedKeyRing {
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}
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return cKey;
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}
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// TODO handle with proper exception
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throw new PgpGeneralException("no encryption key available");
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}
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public boolean verifySubkeyBinding(WrappedPublicKey cachedSubkey) {
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boolean validSubkeyBinding = false;
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boolean validTempSubkeyBinding = false;
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boolean validPrimaryKeyBinding = false;
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PGPPublicKey masterKey = getRing().getPublicKey();
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PGPPublicKey subKey = cachedSubkey.getPublicKey();
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// Is this the master key? Match automatically, then.
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if(Arrays.equals(masterKey.getFingerprint(), subKey.getFingerprint())) {
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return true;
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}
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JcaPGPContentVerifierBuilderProvider contentVerifierBuilderProvider =
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new JcaPGPContentVerifierBuilderProvider()
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.setProvider(Constants.BOUNCY_CASTLE_PROVIDER_NAME);
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Iterator<PGPSignature> itr = subKey.getSignatures();
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while (itr.hasNext()) { //what does gpg do if the subkey binding is wrong?
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//gpg has an invalid subkey binding error on key import I think, but doesn't shout
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//about keys without subkey signing. Can't get it to import a slightly broken one
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//either, so we will err on bad subkey binding here.
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PGPSignature sig = itr.next();
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if (sig.getKeyID() == masterKey.getKeyID() &&
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sig.getSignatureType() == PGPSignature.SUBKEY_BINDING) {
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//check and if ok, check primary key binding.
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try {
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sig.init(contentVerifierBuilderProvider, masterKey);
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validTempSubkeyBinding = sig.verifyCertification(masterKey, subKey);
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} catch (PGPException e) {
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continue;
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} catch (SignatureException e) {
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continue;
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}
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if (validTempSubkeyBinding) {
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validSubkeyBinding = true;
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}
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if (validTempSubkeyBinding) {
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validPrimaryKeyBinding = verifyPrimaryKeyBinding(sig.getUnhashedSubPackets(),
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masterKey, subKey);
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if (validPrimaryKeyBinding) {
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break;
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}
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validPrimaryKeyBinding = verifyPrimaryKeyBinding(sig.getHashedSubPackets(),
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masterKey, subKey);
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if (validPrimaryKeyBinding) {
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break;
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}
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}
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}
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}
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return validSubkeyBinding && validPrimaryKeyBinding;
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}
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static boolean verifyPrimaryKeyBinding(PGPSignatureSubpacketVector pkts,
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PGPPublicKey masterPublicKey,
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PGPPublicKey signingPublicKey) {
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boolean validPrimaryKeyBinding = false;
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JcaPGPContentVerifierBuilderProvider contentVerifierBuilderProvider =
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new JcaPGPContentVerifierBuilderProvider()
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.setProvider(Constants.BOUNCY_CASTLE_PROVIDER_NAME);
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PGPSignatureList eSigList;
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if (pkts.hasSubpacket(SignatureSubpacketTags.EMBEDDED_SIGNATURE)) {
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try {
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eSigList = pkts.getEmbeddedSignatures();
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} catch (IOException e) {
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return false;
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} catch (PGPException e) {
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return false;
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}
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for (int j = 0; j < eSigList.size(); ++j) {
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PGPSignature emSig = eSigList.get(j);
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if (emSig.getSignatureType() == PGPSignature.PRIMARYKEY_BINDING) {
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try {
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emSig.init(contentVerifierBuilderProvider, signingPublicKey);
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validPrimaryKeyBinding = emSig.verifyCertification(masterPublicKey, signingPublicKey);
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if (validPrimaryKeyBinding) {
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break;
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}
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} catch (PGPException e) {
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continue;
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} catch (SignatureException e) {
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continue;
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}
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}
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}
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}
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return validPrimaryKeyBinding;
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}
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public IterableIterator<WrappedPublicKey> publicKeyIterator() {
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@SuppressWarnings("unchecked")
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final Iterator<PGPPublicKey> it = getRing().getPublicKeys();
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return new IterableIterator<WrappedPublicKey>(new Iterator<WrappedPublicKey>() {
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@Override
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