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/*
* Copyright (C) Art O Cathain
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.support;
import org.spongycastle.bcpg.CompressionAlgorithmTags;
import org.spongycastle.bcpg.ContainedPacket;
import org.spongycastle.bcpg.HashAlgorithmTags;
import org.spongycastle.bcpg.MPInteger;
import org.spongycastle.bcpg.PublicKeyAlgorithmTags;
import org.spongycastle.bcpg.PublicKeyPacket;
import org.spongycastle.bcpg.PublicSubkeyPacket;
import org.spongycastle.bcpg.RSAPublicBCPGKey;
import org.spongycastle.bcpg.SignaturePacket;
import org.spongycastle.bcpg.SignatureSubpacket;
import org.spongycastle.bcpg.SignatureSubpacketInputStream;
import org.spongycastle.bcpg.SignatureSubpacketTags;
import org.spongycastle.bcpg.SymmetricKeyAlgorithmTags;
import org.spongycastle.bcpg.UserIDPacket;
import org.spongycastle.bcpg.sig.Features;
import org.spongycastle.bcpg.sig.IssuerKeyID;
import org.spongycastle.bcpg.sig.KeyExpirationTime;
import org.spongycastle.bcpg.sig.KeyFlags;
import org.spongycastle.bcpg.sig.PreferredAlgorithms;
import org.spongycastle.bcpg.sig.SignatureCreationTime;
import org.spongycastle.openpgp.PGPSignature;
import org.sufficientlysecure.keychain.pgp.UncachedKeyRing;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.concurrent.TimeUnit;
/**
* Helps create correct and incorrect keyrings for tests.
*
* The original "correct" keyring was generated by GnuPG.
*/
public class KeyringBuilder {
private static final BigInteger PUBLIC_KEY_MODULUS = new BigInteger(
"cbab78d90d5f2cc0c54dd3c3953005a1e6b521f1ffa5465a102648bf7b91ec72" +
"f9c180759301587878caeb73332156209f81ca5b3b94309d96110f6972cfc56a" +
"37fd6279f61d71f19b8f64b288e338299dce133520f5b9b4253e6f4ba31ca36a" +
"fd87c2081b15f0b283e9350e370e181a23d31379101f17a23ae9192250db6540" +
"2e9cab2a275bc5867563227b197c8b136c832a94325b680e144ed864fb00b9b8" +
"b07e13f37b40d5ac27dae63cd6a470a7b40fa3c7479b5b43e634850cc680b177" +
"8dd6b1b51856f36c3520f258f104db2f96b31a53dd74f708ccfcefccbe420a90" +
"1c37f1f477a6a4b15f5ecbbfd93311a647bcc3f5f81c59dfe7252e3cd3be6e27"
, 16
);
private static final BigInteger PUBLIC_SUBKEY_MODULUS = new BigInteger(
"e8e2e2a33102649f19f8a07486fb076a1406ca888d72ae05d28f0ef372b5408e" +
"45132c69f6e5cb6a79bb8aed84634196731393a82d53e0ddd42f28f92cc15850" +
"8ce3b7ca1a9830502745aee774f86987993df984781f47c4a2910f95cf4c950c" +
"c4c6cccdc134ad408a0c5418b5e360c9781a8434d366053ea6338b975fae88f9" +
"383a10a90e7b2caa9ddb95708aa9d8a90246e29b04dbd6136613085c9a287315" +
"c6e9c7ff4012defc1713875e3ff6073333a1c93d7cd75ebeaaf16b8b853d96ba" +
"7003258779e8d2f70f1bc0bcd3ef91d7a9ccd8e225579b2d6fcae32799b0a6c0" +
"e7305fc65dc4edc849c6130a0d669c90c193b1e746c812510f9d600a208be4a5"
, 16
);
private static final Date SIGNATURE_DATE = new Date(1404566755000L);
private static final BigInteger EXPONENT = BigInteger.valueOf(0x010001);
private static final String USER_ID_STRING = "OpenKeychain User (NOT A REAL KEY) <openkeychain@example.com>";
public static final BigInteger CORRECT_SIGNATURE = new BigInteger(
"b065c071d3439d5610eb22e5b4df9e42ed78b8c94f487389e4fc98e8a75a043f" +
"14bf57d591811e8e7db2d31967022d2ee64372829183ec51d0e20c42d7a1e519" +
"e9fa22cd9db90f0fd7094fd093b78be2c0db62022193517404d749152c71edc6" +
"fd48af3416038d8842608ecddebbb11c5823a4321d2029b8993cb017fa8e5ad7" +
"8a9a618672d0217c4b34002f1a4a7625a514b6a86475e573cb87c64d7069658e" +
"627f2617874007a28d525e0f87d93ca7b15ad10dbdf10251e542afb8f9b16cbf" +
"7bebdb5fe7e867325a44e59cad0991cb239b1c859882e2ebb041b80e5cdc3b40" +
"ed259a8a27d63869754c0881ccdcb50f0564fecdc6966be4a4b87a3507a9d9be"
, 16
);
public static final BigInteger CORRECT_SUBKEY_SIGNATURE = new BigInteger(
"9c40543e646cfa6d3d1863d91a4e8f1421d0616ddb3187505df75fbbb6c59dd5" +
"3136b866f246a0320e793cb142c55c8e0e521d1e8d9ab864650f10690f5f1429" +
"2eb8402a3b1f82c01079d12f5c57c43fce524a530e6f49f6f87d984e26db67a2" +
"d469386dac87553c50147ebb6c2edd9248325405f737b815253beedaaba4f5c9" +
"3acd5d07fe6522ceda1027932d849e3ec4d316422cd43ea6e506f643936ab0be" +
"8246e546bb90d9a83613185047566864ffe894946477e939725171e0e15710b2" +
"089f78752a9cb572f5907323f1b62f14cb07671aeb02e6d7178f185467624ec5" +
"74e4a73c439a12edba200a4832106767366a1e6f63da0a42d593fa3914deee2b"
, 16
);
public static final BigInteger KEY_ID = BigInteger.valueOf(0x15130BCF071AE6BFL);
public static UncachedKeyRing correctRing() {
return convertToKeyring(correctKeyringPackets());
}
public static UncachedKeyRing ringWithExtraIncorrectSignature() {
List<ContainedPacket> packets = correctKeyringPackets();
SignaturePacket incorrectSignaturePacket = createSignaturePacket(CORRECT_SIGNATURE.subtract(BigInteger.ONE));
packets.add(2, incorrectSignaturePacket);
return convertToKeyring(packets);
}
private static UncachedKeyRing convertToKeyring(List<ContainedPacket> packets) {
try {
return UncachedKeyRing.decodeFromData(TestDataUtil.concatAll(packets));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private static List<ContainedPacket> correctKeyringPackets() {
PublicKeyPacket publicKey = createPgpPublicKey(PUBLIC_KEY_MODULUS);
UserIDPacket userId = createUserId(USER_ID_STRING);
SignaturePacket signaturePacket = createSignaturePacket(CORRECT_SIGNATURE);
PublicKeyPacket subKey = createPgpPublicSubKey(PUBLIC_SUBKEY_MODULUS);
SignaturePacket subKeySignaturePacket = createSubkeySignaturePacket();
return new ArrayList<ContainedPacket>(Arrays.asList(
publicKey,
userId,
signaturePacket,
subKey,
subKeySignaturePacket
));
}
private static SignaturePacket createSignaturePacket(BigInteger signature) {
MPInteger[] signatureArray = new MPInteger[]{
new MPInteger(signature)
};
int signatureType = PGPSignature.POSITIVE_CERTIFICATION;
int keyAlgorithm = SignaturePacket.RSA_GENERAL;
int hashAlgorithm = HashAlgorithmTags.SHA1;
SignatureSubpacket[] hashedData = new SignatureSubpacket[]{
new SignatureCreationTime(false, SIGNATURE_DATE),
new KeyFlags(false, KeyFlags.CERTIFY_OTHER + KeyFlags.SIGN_DATA),
new KeyExpirationTime(false, TimeUnit.DAYS.toSeconds(2)),
new PreferredAlgorithms(SignatureSubpacketTags.PREFERRED_SYM_ALGS, false, new int[]{
SymmetricKeyAlgorithmTags.AES_256,
SymmetricKeyAlgorithmTags.AES_192,
SymmetricKeyAlgorithmTags.AES_128,
SymmetricKeyAlgorithmTags.CAST5,
SymmetricKeyAlgorithmTags.TRIPLE_DES
}),
new PreferredAlgorithms(SignatureSubpacketTags.PREFERRED_HASH_ALGS, false, new int[]{
HashAlgorithmTags.SHA256,
HashAlgorithmTags.SHA1,
HashAlgorithmTags.SHA384,
HashAlgorithmTags.SHA512,
HashAlgorithmTags.SHA224
}),
new PreferredAlgorithms(SignatureSubpacketTags.PREFERRED_COMP_ALGS, false, new int[]{
CompressionAlgorithmTags.ZLIB,
CompressionAlgorithmTags.BZIP2,
CompressionAlgorithmTags.ZIP
}),
new Features(false, Features.FEATURE_MODIFICATION_DETECTION),
createPreferencesSignatureSubpacket()
};
SignatureSubpacket[] unhashedData = new SignatureSubpacket[]{
new IssuerKeyID(false, false, KEY_ID.toByteArray())
};
byte[] fingerPrint = new BigInteger("522c", 16).toByteArray();
return new SignaturePacket(signatureType,
KEY_ID.longValue(),
keyAlgorithm,
hashAlgorithm,
hashedData,
unhashedData,
fingerPrint,
signatureArray);
}
/**
* There is no Preferences subpacket in BouncyCastle, so we have
* to create one manually.
*/
private static SignatureSubpacket createPreferencesSignatureSubpacket() {
SignatureSubpacket prefs;
try {
prefs = new SignatureSubpacketInputStream(new ByteArrayInputStream(
new byte[]{2, SignatureSubpacketTags.KEY_SERVER_PREFS, (byte) 0x80})
).readPacket();
} catch (IOException ex) {
throw new RuntimeException(ex);
}
return prefs;
}
private static SignaturePacket createSubkeySignaturePacket() {
int signatureType = PGPSignature.SUBKEY_BINDING;
int keyAlgorithm = SignaturePacket.RSA_GENERAL;
int hashAlgorithm = HashAlgorithmTags.SHA1;
SignatureSubpacket[] hashedData = new SignatureSubpacket[]{
new SignatureCreationTime(false, SIGNATURE_DATE),
new KeyFlags(false, KeyFlags.ENCRYPT_COMMS + KeyFlags.ENCRYPT_STORAGE),
new KeyExpirationTime(false, TimeUnit.DAYS.toSeconds(2)),
};
SignatureSubpacket[] unhashedData = new SignatureSubpacket[]{
new IssuerKeyID(false, false, KEY_ID.toByteArray())
};
byte[] fingerPrint = new BigInteger("234a", 16).toByteArray();
MPInteger[] signature = new MPInteger[]{
new MPInteger(CORRECT_SUBKEY_SIGNATURE)
};
return new SignaturePacket(signatureType,
KEY_ID.longValue(),
keyAlgorithm,
hashAlgorithm,
hashedData,
unhashedData,
fingerPrint,
signature);
}
private static PublicKeyPacket createPgpPublicKey(BigInteger modulus) {
return new PublicKeyPacket(PublicKeyAlgorithmTags.RSA_GENERAL, SIGNATURE_DATE, new RSAPublicBCPGKey(modulus, EXPONENT));
}
private static PublicKeyPacket createPgpPublicSubKey(BigInteger modulus) {
return new PublicSubkeyPacket(PublicKeyAlgorithmTags.RSA_GENERAL, SIGNATURE_DATE, new RSAPublicBCPGKey(modulus, EXPONENT));
}
private static UserIDPacket createUserId(String userId) {
return new UserIDPacket(userId);
}
}
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