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Code Issues Releases Wiki Activity

Improve handling of signatures with missing issuerKeyId packets

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This commit is contained in:
Paul Schaub 2021-07-31 22:24:39 +02:00
parent 311c842196
commit fb16db5db4
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
4 changed files with 109 additions and 7 deletions
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6
pgpainless-core/src/main/java/org/pgpainless/decryption_verification/DecryptionStreamFactory.java
View file

@ -66,6 +66,7 @@ import org.pgpainless.key.info.KeyRingInfo;
import org.pgpainless.key.protection.UnlockSecretKey;
import org.pgpainless.signature.DetachedSignature;
import org.pgpainless.signature.OnePassSignature;
import org.pgpainless.signature.SignatureUtils;
import org.pgpainless.util.CRCingArmoredInputStreamWrapper;
import org.pgpainless.util.IntegrityProtectedInputStream;
import org.pgpainless.util.Passphrase;
@ -90,11 +91,12 @@ public final class DecryptionStreamFactory {
this.options = options;
for (PGPSignature signature : options.getDetachedSignatures()) {
PGPPublicKeyRing signingKeyRing = findSignatureVerificationKeyRing(signature.getKeyID());
long issuerKeyId = SignatureUtils.determineIssuerKeyId(signature);
PGPPublicKeyRing signingKeyRing = findSignatureVerificationKeyRing(issuerKeyId);
if (signingKeyRing == null) {
continue;
}
PGPPublicKey signingKey = signingKeyRing.getPublicKey(signature.getKeyID());
PGPPublicKey signingKey = signingKeyRing.getPublicKey(issuerKeyId);
SubkeyIdentifier signingKeyIdentifier = new SubkeyIdentifier(signingKeyRing, signingKey.getKeyID());
try {
signature.init(ImplementationFactory.getInstance().getPGPContentVerifierBuilderProvider(), signingKey);

12
pgpainless-core/src/main/java/org/pgpainless/signature/SignatureChainValidator.java
View file

@ -65,10 +65,10 @@ public class SignatureChainValidator {
throws SignatureValidationException {
Map<PGPSignature, Exception> rejections = new ConcurrentHashMap<>();
PGPPublicKey signingSubkey = signingKeyRing.getPublicKey(signature.getKeyID());
long keyId = SignatureUtils.determineIssuerKeyId(signature);
PGPPublicKey signingSubkey = signingKeyRing.getPublicKey(keyId);
if (signingSubkey == null) {
throw new SignatureValidationException("Provided key ring does not contain a subkey with id " + Long.toHexString(signature.getKeyID()));
throw new SignatureValidationException("Provided key ring does not contain a subkey with id " + Long.toHexString(keyId));
}
PGPPublicKey primaryKey = signingKeyRing.getPublicKey();
@ -237,7 +237,8 @@ public class SignatureChainValidator {
Date validationDate)
throws SignatureValidationException {
validateSigningKey(signature, signingKeyRing, policy);
return SignatureValidator.verifyUninitializedSignature(signature, signedData, signingKeyRing.getPublicKey(signature.getKeyID()), policy, validationDate);
long keyId = SignatureUtils.determineIssuerKeyId(signature);
return SignatureValidator.verifyUninitializedSignature(signature, signedData, signingKeyRing.getPublicKey(keyId), policy, validationDate);
}
/**
@ -253,7 +254,8 @@ public class SignatureChainValidator {
public static boolean validateSignature(PGPSignature signature, PGPPublicKeyRing verificationKeys, Policy policy)
throws SignatureValidationException {
validateSigningKey(signature, verificationKeys, policy);
PGPPublicKey signingKey = verificationKeys.getPublicKey(signature.getKeyID());
long keyId = SignatureUtils.determineIssuerKeyId(signature);
PGPPublicKey signingKey = verificationKeys.getPublicKey(keyId);
SignatureValidator.verifyInitializedSignature(signature, signingKey, policy, signature.getCreationTime());
return true;
}

16
pgpainless-core/src/main/java/org/pgpainless/signature/SignatureUtils.java
View file

@ -23,6 +23,7 @@ import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.bouncycastle.bcpg.sig.IssuerKeyID;
import org.bouncycastle.bcpg.MarkerPacket;
import org.bouncycastle.bcpg.sig.KeyExpirationTime;
import org.bouncycastle.bcpg.sig.RevocationReason;
@ -42,6 +43,7 @@ import org.pgpainless.PGPainless;
import org.pgpainless.algorithm.HashAlgorithm;
import org.pgpainless.algorithm.SignatureType;
import org.pgpainless.implementation.ImplementationFactory;
import org.pgpainless.key.OpenPgpV4Fingerprint;
import org.pgpainless.key.util.OpenPgpKeyAttributeUtil;
import org.pgpainless.key.util.RevocationAttributes;
import org.pgpainless.policy.Policy;
@ -227,6 +229,20 @@ public class SignatureUtils {
return signatures;
}
public static long determineIssuerKeyId(PGPSignature signature) {
IssuerKeyID issuerKeyId = SignatureSubpacketsUtil.getIssuerKeyId(signature);
OpenPgpV4Fingerprint fingerprint = SignatureSubpacketsUtil.getIssuerFingerprintAsOpenPgpV4Fingerprint(signature);
if (issuerKeyId != null && issuerKeyId.getKeyID() != 0) {
return issuerKeyId.getKeyID();
}
if (issuerKeyId == null) {
if (fingerprint != null) {
return fingerprint.getKeyId();
}
}
return 0;
}
public static String getSignatureDigestPrefix(PGPSignature signature) {
return Hex.toHexString(signature.getDigestPrefix());
}

82
pgpainless-core/src/test/java/org/pgpainless/signature/SignatureChainValidatorTest.java
View file

@ -16,6 +16,7 @@
package org.pgpainless.signature;
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertThrows;
import java.io.ByteArrayInputStream;
@ -27,9 +28,14 @@ import java.util.Date;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPPublicKeyRing;
import org.bouncycastle.openpgp.PGPSignature;
import org.bouncycastle.util.io.Streams;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import org.pgpainless.PGPainless;
import org.pgpainless.decryption_verification.ConsumerOptions;
import org.pgpainless.decryption_verification.DecryptionStream;
import org.pgpainless.decryption_verification.OpenPgpMetadata;
import org.pgpainless.exception.SignatureValidationException;
import org.pgpainless.implementation.ImplementationFactory;
import org.pgpainless.policy.Policy;
@ -1330,4 +1336,80 @@ public class SignatureChainValidatorTest {
private static InputStream getSignedData(String data) {
return new ByteArrayInputStream(data.getBytes(StandardCharsets.UTF_8));
}
@Test
public void testNoIssuer() throws IOException, PGPException {
String SIG = "-----BEGIN PGP SIGNATURE-----\n" +
"\n" +
"wsExBAABCABlBYJhBZl3RxQAAAAAAB4AIHNhbHRAbm90YXRpb25zLnNlcXVvaWEt\n" +
"cGdwLm9yZ6u++H3Om9Z3+mn7nyt3TSxs4o/D4fHi+e+X+/7jEj3dFiEE0aZuGiOx\n" +
"gsmYD3iM+/zIKgFeczAAAOQKDACD4krXC/9GQQcl+waBglgmQaUWd+YEpXlPDQc3\n" +
"dPF7kkc/pRmmGVur8kk8rWmuQwNvQt7vGD2YJzcWBFvSSZlbYa89Gd3L5H2keTYC\n" +
"0Q/VbZqBp9ONtK3D9Yrti2jMYdcb30LZQnsSUsB0mwX41AxjPLx0FAcVMAEADjq/\n" +
"zLkJ1y+vXCko653qS/um6VQGK8JeNHRz8ghrc4k0E2yYadWWO07wxuoTAlwskf32\n" +
"MdSVeIUQIEZqEgWMbqtqglqL3eNWk56IonCePtulkQSN6qi4JpqTeudlOm+Zp/IN\n" +
"Tk+vrdS8PyQ0CiM794t/iHZDK5Jyz4ccFhTLPbF58xnwkwqdWPdf8WjCzaLfZcuN\n" +
"zajVdDXOBjNC1s10voENZhChsZYc9BfHqVMrOe8ngLKCCzqlJ/E930OJiZX5pc+H\n" +
"mHaHdn0m6lrhM5JX6RT9TNS/yrjdpkScb68Rcf+rXdeSoCE/aDOCVXhIhVTMQ9di\n" +
"Ch80fhwtYYjAM9G0/AEs7uBCGQQ=\n" +
"=NDO/\n" +
"-----END PGP SIGNATURE-----\n";
String CERT = "-----BEGIN PGP PUBLIC KEY BLOCK-----\n" +
"Comment: Bob's OpenPGP certificate\n" +
"\n" +
"mQGNBF2lnPIBDAC5cL9PQoQLTMuhjbYvb4Ncuuo0bfmgPRFywX53jPhoFf4Zg6mv\n" +
"/seOXpgecTdOcVttfzC8ycIKrt3aQTiwOG/ctaR4Bk/t6ayNFfdUNxHWk4WCKzdz\n" +
"/56fW2O0F23qIRd8UUJp5IIlN4RDdRCtdhVQIAuzvp2oVy/LaS2kxQoKvph/5pQ/\n" +
"5whqsyroEWDJoSV0yOb25B/iwk/pLUFoyhDG9bj0kIzDxrEqW+7Ba8nocQlecMF3\n" +
"X5KMN5kp2zraLv9dlBBpWW43XktjcCZgMy20SouraVma8Je/ECwUWYUiAZxLIlMv\n" +
"9CurEOtxUw6N3RdOtLmYZS9uEnn5y1UkF88o8Nku890uk6BrewFzJyLAx5wRZ4F0\n" +
"qV/yq36UWQ0JB/AUGhHVPdFf6pl6eaxBwT5GXvbBUibtf8YI2og5RsgTWtXfU7eb\n" +
"SGXrl5ZMpbA6mbfhd0R8aPxWfmDWiIOhBufhMCvUHh1sApMKVZnvIff9/0Dca3wb\n" +
"vLIwa3T4CyshfT0AEQEAAbQhQm9iIEJhYmJhZ2UgPGJvYkBvcGVucGdwLmV4YW1w\n" +
"bGU+iQHOBBMBCgA4AhsDBQsJCAcCBhUKCQgLAgQWAgMBAh4BAheAFiEE0aZuGiOx\n" +
"gsmYD3iM+/zIKgFeczAFAl2lnvoACgkQ+/zIKgFeczBvbAv/VNk90a6hG8Od9xTz\n" +
"XxH5YRFUSGfIA1yjPIVOnKqhMwps2U+sWE3urL+MvjyQRlyRV8oY9IOhQ5Esm6DO\n" +
"ZYrTnE7qVETm1ajIAP2OFChEc55uH88x/anpPOXOJY7S8jbn3naC9qad75BrZ+3g\n" +
"9EBUWiy5p8TykP05WSnSxNRt7vFKLfEB4nGkehpwHXOVF0CRNwYle42bg8lpmdXF\n" +
"DcCZCi+qEbafmTQzkAqyzS3nCh3IAqq6Y0kBuaKLm2tSNUOlZbD+OHYQNZ5Jix7c\n" +
"ZUzs6Xh4+I55NRWl5smrLq66yOQoFPy9jot/Qxikx/wP3MsAzeGaZSEPc0fHp5G1\n" +
"6rlGbxQ3vl8/usUV7W+TMEMljgwd5x8POR6HC8EaCDfVnUBCPi/Gv+egLjsIbPJZ\n" +
"ZEroiE40e6/UoCiQtlpQB5exPJYSd1Q1txCwueih99PHepsDhmUQKiACszNU+RRo\n" +
"zAYau2VdHqnRJ7QYdxHDiH49jPK4NTMyb/tJh2TiIwcmsIpGuQGNBF2lnPIBDADW\n" +
"ML9cbGMrp12CtF9b2P6z9TTT74S8iyBOzaSvdGDQY/sUtZXRg21HWamXnn9sSXvI\n" +
"DEINOQ6A9QxdxoqWdCHrOuW3ofneYXoG+zeKc4dC86wa1TR2q9vW+RMXSO4uImA+\n" +
"Uzula/6k1DogDf28qhCxMwG/i/m9g1c/0aApuDyKdQ1PXsHHNlgd/Dn6rrd5y2AO\n" +
"baifV7wIhEJnvqgFXDN2RXGjLeCOHV4Q2WTYPg/S4k1nMXVDwZXrvIsA0YwIMgIT\n" +
"86Rafp1qKlgPNbiIlC1g9RY/iFaGN2b4Ir6GDohBQSfZW2+LXoPZuVE/wGlQ01rh\n" +
"827KVZW4lXvqsge+wtnWlszcselGATyzqOK9LdHPdZGzROZYI2e8c+paLNDdVPL6\n" +
"vdRBUnkCaEkOtl1mr2JpQi5nTU+gTX4IeInC7E+1a9UDF/Y85ybUz8XV8rUnR76U\n" +
"qVC7KidNepdHbZjjXCt8/Zo+Tec9JNbYNQB/e9ExmDntmlHEsSEQzFwzj8sxH48A\n" +
"EQEAAYkBtgQYAQoAIBYhBNGmbhojsYLJmA94jPv8yCoBXnMwBQJdpZzyAhsMAAoJ\n" +
"EPv8yCoBXnMw6f8L/26C34dkjBffTzMj5Bdzm8MtF67OYneJ4TQMw7+41IL4rVcS\n" +
"KhIhk/3Ud5knaRtP2ef1+5F66h9/RPQOJ5+tvBwhBAcUWSupKnUrdVaZQanYmtSx\n" +
"cVV2PL9+QEiNN3tzluhaWO//rACxJ+K/ZXQlIzwQVTpNhfGzAaMVV9zpf3u0k14i\n" +
"tcv6alKY8+rLZvO1wIIeRZLmU0tZDD5HtWDvUV7rIFI1WuoLb+KZgbYn3OWjCPHV\n" +
"dTrdZ2CqnZbG3SXw6awH9bzRLV9EXkbhIMez0deCVdeo+wFFklh8/5VK2b0vk/+w\n" +
"qMJxfpa1lHvJLobzOP9fvrswsr92MA2+k901WeISR7qEzcI0Fdg8AyFAExaEK6Vy\n" +
"jP7SXGLwvfisw34OxuZr3qmx1Sufu4toH3XrB7QJN8XyqqbsGxUCBqWif9RSK4xj\n" +
"zRTe56iPeiSJJOIciMP9i2ldI+KgLycyeDvGoBj0HCLO3gVaBe4ubVrj5KjhX2PV\n" +
"NEJd3XZRzaXZE2aAMQ==\n" +
"=NXei\n" +
"-----END PGP PUBLIC KEY BLOCK-----\n";
String DATA = "Hello World :)";
DecryptionStream decryptionStream = PGPainless.decryptAndOrVerify()
.onInputStream(new ByteArrayInputStream(DATA.getBytes(StandardCharsets.UTF_8)))
.withOptions(new ConsumerOptions()
.addVerificationCert(PGPainless.readKeyRing().publicKeyRing(CERT))
.addVerificationOfDetachedSignatures(new ByteArrayInputStream(SIG.getBytes(StandardCharsets.UTF_8))));
Streams.drain(decryptionStream);
decryptionStream.close();
OpenPgpMetadata metadata = decryptionStream.getResult();
assertFalse(metadata.getVerifiedSignatures().isEmpty());
}
}