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Code Issues Releases Wiki Activity

Cleanse duplicated code

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This commit is contained in:
Paul Schaub 2021-05-28 22:37:16 +02:00
parent a23f2c4401
commit c255439ee2
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
2 changed files with 6 additions and 198 deletions
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199
pgpainless-core/src/main/java/org/pgpainless/signature/SignatureUtils.java
View file

@ -15,18 +15,12 @@
*/
package org.pgpainless.signature;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import org.bouncycastle.bcpg.sig.KeyExpirationTime;
import org.bouncycastle.bcpg.sig.RevocationReason;
import org.bouncycastle.bcpg.sig.SignatureExpirationTime;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPKeyRing;
import org.bouncycastle.openpgp.PGPPublicKey;
import org.bouncycastle.openpgp.PGPSecretKey;
import org.bouncycastle.openpgp.PGPSignature;
@ -36,7 +30,6 @@ import org.pgpainless.PGPainless;
import org.pgpainless.algorithm.HashAlgorithm;
import org.pgpainless.algorithm.SignatureType;
import org.pgpainless.implementation.ImplementationFactory;
import org.pgpainless.key.util.KeyRingUtils;
import org.pgpainless.key.util.OpenPgpKeyAttributeUtil;
import org.pgpainless.key.util.RevocationAttributes;
import org.pgpainless.policy.Policy;
@ -72,12 +65,14 @@ public class SignatureUtils {
}
/**
* Return a content signer builder fot the passed public key.
* Return a content signer builder for the passed public key.
*
* The content signer will use a hash algorithm derived from the keys algorithm preferences.
* If no preferences can be derived, the key will fall back to the default hash algorithm as set in
* the {@link org.pgpainless.policy.Policy}.
*
* TODO: Move negotiation to negotiator class
*
* @param publicKey public key
* @return content signer builder
*/
@ -109,114 +104,6 @@ public class SignatureUtils {
return PGPainless.getPolicy().getSignatureHashAlgorithmPolicy().defaultHashAlgorithm();
}
/**
* Return the latest valid signature on the provided public key.
*
* @param publicKey signed key
* @param signatures signatures
* @param keyRing key ring containing signature creator key
* @return latest valid signature
* @throws PGPException in case of a validation error
*/
public static PGPSignature getLatestValidSignature(PGPPublicKey publicKey,
List<PGPSignature> signatures,
PGPKeyRing keyRing)
throws PGPException {
List<PGPSignature> valid = new ArrayList<>();
for (PGPSignature signature : signatures) {
long issuerID = signature.getKeyID();
PGPPublicKey issuer = KeyRingUtils.getPublicKeyFrom(keyRing, issuerID);
if (issuer == null) {
continue;
}
if (!isSignatureValid(signature, issuer, publicKey)) {
continue;
}
if (isSignatureExpired(signature)) {
continue;
}
valid.add(signature);
}
sortByCreationTimeAscending(valid);
return valid.isEmpty() ? null : valid.get(valid.size() - 1);
}
/**
* Return true, iff a signature is valid.
*
* @param signature signature to validate
* @param issuer signing key
* @param target signed key
* @return true if signature is valid
* @throws PGPException if a validation error occurs.
*/
public static boolean isSignatureValid(PGPSignature signature, PGPPublicKey issuer, PGPPublicKey target) throws PGPException {
SignatureType signatureType = SignatureType.valueOf(signature.getSignatureType());
switch (signatureType) {
case BINARY_DOCUMENT:
case CANONICAL_TEXT_DOCUMENT:
case STANDALONE:
case TIMESTAMP:
case THIRD_PARTY_CONFIRMATION:
throw new IllegalArgumentException("Signature is not a key signature.");
case GENERIC_CERTIFICATION:
case NO_CERTIFICATION:
case CASUAL_CERTIFICATION:
case POSITIVE_CERTIFICATION:
case DIRECT_KEY:
return isSelfSignatureValid(signature, issuer);
case KEY_REVOCATION:
case CERTIFICATION_REVOCATION:
return isRevocationSignatureValid(signature, issuer);
case SUBKEY_BINDING:
case PRIMARYKEY_BINDING:
case SUBKEY_REVOCATION:
return isKeyOnKeySignatureValid(signature, issuer, target);
}
return false;
}
public static boolean isKeyOnKeySignatureValid(PGPSignature signature, PGPPublicKey issuer, PGPPublicKey target) throws PGPException {
signature.init(ImplementationFactory.getInstance().getPGPContentVerifierBuilderProvider(), issuer);
return signature.verifyCertification(issuer, target);
}
public static boolean isSelfSignatureValid(PGPSignature signature, PGPPublicKey publicKey) throws PGPException {
if (!PGPainless.getPolicy().getSignatureHashAlgorithmPolicy().isAcceptable(signature.getHashAlgorithm())) {
return false;
}
for (Iterator<String> it = publicKey.getUserIDs(); it.hasNext(); ) {
String userId = it.next();
boolean valid = isSelfSignatureOnUserIdValid(signature, userId, publicKey);
if (valid) {
return true;
}
}
return false;
}
public static boolean isRevocationSignatureValid(PGPSignature signature, PGPPublicKey publicKey) throws PGPException {
if (!PGPainless.getPolicy().getRevocationSignatureHashAlgorithmPolicy().isAcceptable(signature.getHashAlgorithm())) {
return false;
}
for (Iterator<String> it = publicKey.getUserIDs(); it.hasNext(); ) {
String userId = it.next();
boolean valid = isSelfSignatureOnUserIdValid(signature, userId, publicKey);
if (valid) {
return true;
}
}
return false;
}
public static boolean isSelfSignatureOnUserIdValid(PGPSignature signature, String userId, PGPPublicKey publicKey) throws PGPException {
signature.init(ImplementationFactory.getInstance().getPGPContentVerifierBuilderProvider(), publicKey);
return signature.verifyCertification(userId, publicKey);
}
public static Date getKeyExpirationDate(Date keyCreationDate, PGPSignature signature) {
KeyExpirationTime keyExpirationTime = SignatureSubpacketsUtil.getKeyExpirationTime(signature);
long expiresInSecs = keyExpirationTime == null ? 0 : keyExpirationTime.getTime();
@ -256,86 +143,6 @@ public class SignatureUtils {
return expirationDate != null && comparisonDate.after(expirationDate);
}
public static void sortByCreationTimeAscending(List<PGPSignature> signatures) {
Collections.sort(signatures, new Comparator<PGPSignature>() {
@Override
public int compare(PGPSignature s1, PGPSignature s2) {
return s1.getCreationTime().compareTo(s2.getCreationTime());
}
});
}
public static List<PGPSignature> getBindingSignatures(PGPPublicKey subKey, long primaryKeyId) {
List<PGPSignature> signatures = new ArrayList<>();
List<PGPSignature> bindingSigs = getSignaturesOfTypes(subKey, SignatureType.SUBKEY_BINDING);
for (PGPSignature signature : bindingSigs) {
if (signature.getKeyID() != primaryKeyId) {
continue;
}
signatures.add(signature);
}
return signatures;
}
public static List<PGPSignature> getSignaturesOfTypes(PGPPublicKey publicKey, SignatureType... types) {
List<PGPSignature> signatures = new ArrayList<>();
for (SignatureType type : types) {
Iterator<?> it = publicKey.getSignaturesOfType(type.getCode());
while (it.hasNext()) {
Object o = it.next();
if (o instanceof PGPSignature) {
signatures.add((PGPSignature) o);
}
}
}
sortByCreationTimeAscending(signatures);
return signatures;
}
public static List<PGPSignature> getSignaturesForUserId(PGPPublicKey publicKey, String userId) {
List<PGPSignature> signatures = new ArrayList<>();
Iterator<?> it = publicKey.getSignaturesForID(userId);
while (it != null && it.hasNext()) {
Object o = it.next();
if (o instanceof PGPSignature) {
signatures.add((PGPSignature) o);
}
}
sortByCreationTimeAscending(signatures);
return signatures;
}
public static PGPSignature getLatestSelfSignatureForUserId(PGPPublicKey publicKey, String userId) throws PGPException {
List<PGPSignature> valid = new ArrayList<>();
List<PGPSignature> signatures = getSignaturesForUserId(publicKey, userId);
for (PGPSignature signature : signatures) {
if (isSelfSignatureOnUserIdValid(signature, userId, publicKey)) {
valid.add(signature);
}
}
return valid.isEmpty() ? null : valid.get(valid.size() - 1);
}
public static boolean isUserIdValid(PGPPublicKey publicKey, String userId) throws PGPException {
return isUserIdValid(publicKey, userId, new Date());
}
public static boolean isUserIdValid(PGPPublicKey publicKey, String userId, Date validationDate) throws PGPException {
PGPSignature latestSelfSig = getLatestSelfSignatureForUserId(publicKey, userId);
if (latestSelfSig == null) {
return false;
}
if (latestSelfSig.getCreationTime().after(validationDate)) {
// Signature creation date lays in the future.
return false;
}
if (isSignatureExpired(latestSelfSig, validationDate)) {
return false;
}
return latestSelfSig.getSignatureType() != SignatureType.CERTIFICATION_REVOCATION.getCode();
}
/**
* Return true if the provided signature is a hard revocation.
* Hard revocations are revocation signatures which either carry a revocation reason of

5
pgpainless-core/src/test/java/org/pgpainless/key/info/UserIdRevocationTest.java
View file

@ -45,7 +45,6 @@ import org.pgpainless.key.protection.PasswordBasedSecretKeyRingProtector;
import org.pgpainless.key.protection.SecretKeyRingProtector;
import org.pgpainless.key.protection.UnprotectedKeysProtector;
import org.pgpainless.key.util.RevocationAttributes;
import org.pgpainless.signature.SignatureUtils;
public class UserIdRevocationTest {
@ -109,7 +108,9 @@ public class UserIdRevocationTest {
.withReason(RevocationAttributes.Reason.USER_ID_NO_LONGER_VALID)
.withDescription("I lost my mail password"))
.done();
PGPSignature signature = SignatureUtils.getLatestSelfSignatureForUserId(secretKeys.getPublicKey(), "secondary@key.id");
KeyRingInfo info = new KeyRingInfo(secretKeys);
PGPSignature signature = info.getUserIdRevocation("secondary@key.id");
RevocationReason reason = (RevocationReason) signature.getHashedSubPackets()
.getSubpacket(SignatureSubpacketTags.REVOCATION_REASON);
assertNotNull(reason);