001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.io; 003 004import static org.openstreetmap.josm.tools.I18n.tr; 005 006import java.io.ByteArrayInputStream; 007import java.io.IOException; 008import java.io.InputStream; 009import java.nio.file.Files; 010import java.nio.file.Path; 011import java.nio.file.Paths; 012import java.security.GeneralSecurityException; 013import java.security.InvalidAlgorithmParameterException; 014import java.security.KeyStore; 015import java.security.KeyStoreException; 016import java.security.MessageDigest; 017import java.security.NoSuchAlgorithmException; 018import java.security.cert.CertificateEncodingException; 019import java.security.cert.CertificateException; 020import java.security.cert.CertificateFactory; 021import java.security.cert.PKIXParameters; 022import java.security.cert.TrustAnchor; 023import java.security.cert.X509Certificate; 024import java.util.Arrays; 025import java.util.Collection; 026import java.util.Collections; 027import java.util.Objects; 028 029import javax.net.ssl.SSLContext; 030import javax.net.ssl.TrustManagerFactory; 031 032import org.openstreetmap.josm.spi.preferences.Config; 033import org.openstreetmap.josm.tools.Logging; 034import org.openstreetmap.josm.tools.PlatformManager; 035import org.openstreetmap.josm.tools.Utils; 036 037/** 038 * Class to add missing root certificates to the list of trusted certificates 039 * for TLS connections. 040 * 041 * The added certificates are deemed trustworthy by the main web browsers and 042 * operating systems, but not included in some distributions of Java. 043 * 044 * The certificates are added in-memory at each start, nothing is written to disk. 045 * @since 9995 046 */ 047public final class CertificateAmendment { 048 049 /** 050 * A certificate amendment. 051 * @since 11943 052 */ 053 public static class CertAmend { 054 private final String filename; 055 private final String sha256; 056 057 protected CertAmend(String filename, String sha256) { 058 this.filename = Objects.requireNonNull(filename); 059 this.sha256 = Objects.requireNonNull(sha256); 060 } 061 062 /** 063 * Returns the certificate filename. 064 * @return filename for both JOSM embedded certificate and Unix platform certificate 065 * @since 12241 066 */ 067 public final String getFilename() { 068 return filename; 069 } 070 071 /** 072 * Returns the SHA-256 hash. 073 * @return the SHA-256 hash, in hexadecimal 074 */ 075 public final String getSha256() { 076 return sha256; 077 } 078 } 079 080 /** 081 * An embedded certificate amendment. 082 * @since 13450 083 */ 084 public static class EmbeddedCertAmend extends CertAmend { 085 private final String url; 086 087 EmbeddedCertAmend(String url, String filename, String sha256) { 088 super(filename, sha256); 089 this.url = Objects.requireNonNull(url); 090 } 091 092 /** 093 * Returns the embedded URL in JOSM jar. 094 * @return path for JOSM embedded certificate 095 */ 096 public final String getUrl() { 097 return url; 098 } 099 100 @Override 101 public String toString() { 102 return url; 103 } 104 } 105 106 /** 107 * A certificate amendment relying on native platform certificate store. 108 * @since 13450 109 */ 110 public static class NativeCertAmend extends CertAmend { 111 private final Collection<String> aliases; 112 private final String httpsWebSite; 113 114 NativeCertAmend(Collection<String> aliases, String filename, String sha256, String httpsWebSite) { 115 super(filename, sha256); 116 this.aliases = Objects.requireNonNull(aliases); 117 this.httpsWebSite = Objects.requireNonNull(httpsWebSite); 118 } 119 120 /** 121 * Returns the native aliases in System Root Certificates keystore/keychain. 122 * @return the native aliases in System Root Certificates keystore/keychain 123 * @since 15006 124 */ 125 public final Collection<String> getNativeAliases() { 126 return aliases; 127 } 128 129 /** 130 * Returns the https website we need to call to notify Windows we need its root certificate. 131 * @return the https website signed with this root CA 132 * @since 13451 133 */ 134 public String getWebSite() { 135 return httpsWebSite; 136 } 137 138 @Override 139 public String toString() { 140 return String.join(" / ", aliases); 141 } 142 } 143 144 /** 145 * Certificates embedded in JOSM 146 */ 147 private static final EmbeddedCertAmend[] CERT_AMEND = { 148 }; 149 150 /** 151 * Certificates looked into platform native keystore and not embedded in JOSM. 152 * Identifiers must match Windows/macOS keystore aliases and Unix filenames for efficient search. 153 * To find correct values, see https://ccadb-public.secure.force.com/mozilla/IncludedCACertificateReport 154 * and https://support.apple.com/en-us/HT208127 155 */ 156 private static final NativeCertAmend[] PLATFORM_CERT_AMEND = { 157 // Let's Encrypt - should be included in JDK, but problems with Ubuntu 18.04, see #15851 158 new NativeCertAmend(Collections.singleton("DST Root CA X3"), 159 "DST_Root_CA_X3.pem", 160 "0687260331a72403d909f105e69bcf0d32e1bd2493ffc6d9206d11bcd6770739", 161 "https://acme-v02.api.letsencrypt.org"), 162 // Government of Netherlands 163 new NativeCertAmend(Collections.singleton("Staat der Nederlanden Root CA - G2"), 164 "Staat_der_Nederlanden_Root_CA_-_G2.crt", 165 "668c83947da63b724bece1743c31a0e6aed0db8ec5b31be377bb784f91b6716f", 166 "https://roottest-g2.pkioverheid.nl"), 167 // Government of Netherlands 168 new NativeCertAmend(Arrays.asList("Government of Netherlands G3", "Staat der Nederlanden Root CA - G3"), 169 "Staat_der_Nederlanden_Root_CA_-_G3.crt", 170 "3c4fb0b95ab8b30032f432b86f535fe172c185d0fd39865837cf36187fa6f428", 171 "https://roottest-g3.pkioverheid.nl"), 172 // Trusted and used by French Government - https://www.certigna.fr/autorites/index.xhtml?ac=Racine#lracine 173 new NativeCertAmend(Collections.singleton("Certigna"), 174 "Certigna.crt", 175 "e3b6a2db2ed7ce48842f7ac53241c7b71d54144bfb40c11f3f1d0b42f5eea12d", 176 "https://www.certigna.fr"), 177 // Trusted and used by Slovakian Government - https://eidas.disig.sk/en/cacert/ 178 new NativeCertAmend(Collections.singleton("CA Disig Root R2"), 179 "CA_Disig_Root_R2.pem", 180 "e23d4a036d7b70e9f595b1422079d2b91edfbb1fb651a0633eaa8a9dc5f80703", 181 "https://eidas.disig.sk"), 182 // Government of Taiwan - https://grca.nat.gov.tw/GRCAeng/index.html 183 new NativeCertAmend(Arrays.asList("TW Government Root Certification Authority", "Government Root Certification Authority"), 184 "Taiwan_GRCA.pem", 185 "7600295eefe85b9e1fd624db76062aaaae59818a54d2774cd4c0b2c01131e1b3", 186 "https://grca.nat.gov.tw") 187 }; 188 189 private CertificateAmendment() { 190 // Hide default constructor for utility classes 191 } 192 193 /** 194 * Add missing root certificates to the list of trusted certificates for TLS connections. 195 * @throws IOException if an I/O error occurs 196 * @throws GeneralSecurityException if a security error occurs 197 */ 198 public static void addMissingCertificates() throws IOException, GeneralSecurityException { 199 if (!Config.getPref().getBoolean("tls.add-missing-certificates", true)) 200 return; 201 KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType()); 202 Path cacertsPath = Paths.get(Utils.getSystemProperty("java.home"), "lib", "security", "cacerts"); 203 try (InputStream is = Files.newInputStream(cacertsPath)) { 204 keyStore.load(is, "changeit".toCharArray()); 205 } catch (SecurityException e) { 206 Logging.log(Logging.LEVEL_ERROR, "Unable to load keystore", e); 207 return; 208 } 209 210 MessageDigest md = MessageDigest.getInstance("SHA-256"); 211 CertificateFactory cf = CertificateFactory.getInstance("X.509"); 212 boolean certificateAdded = false; 213 // Add embedded certificates. Exit in case of error 214 for (EmbeddedCertAmend certAmend : CERT_AMEND) { 215 try (CachedFile certCF = new CachedFile(certAmend.url)) { 216 X509Certificate cert = (X509Certificate) cf.generateCertificate( 217 new ByteArrayInputStream(certCF.getByteContent())); 218 if (checkAndAddCertificate(md, cert, certAmend, keyStore)) { 219 certificateAdded = true; 220 } 221 } 222 } 223 224 try { 225 // Try to add platform certificates. Do not exit in case of error (embedded certificates may be OK) 226 for (NativeCertAmend certAmend : PLATFORM_CERT_AMEND) { 227 X509Certificate cert = PlatformManager.getPlatform().getX509Certificate(certAmend); 228 if (checkAndAddCertificate(md, cert, certAmend, keyStore)) { 229 certificateAdded = true; 230 } 231 } 232 } catch (KeyStoreException | NoSuchAlgorithmException | CertificateException | IOException | IllegalStateException e) { 233 Logging.error(e); 234 } 235 236 if (certificateAdded) { 237 TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm()); 238 tmf.init(keyStore); 239 SSLContext sslContext = SSLContext.getInstance("TLSv1.2"); 240 sslContext.init(null, tmf.getTrustManagers(), null); 241 SSLContext.setDefault(sslContext); 242 } 243 } 244 245 private static boolean checkAndAddCertificate(MessageDigest md, X509Certificate cert, CertAmend certAmend, KeyStore keyStore) 246 throws CertificateEncodingException, KeyStoreException, InvalidAlgorithmParameterException { 247 if (cert != null) { 248 String sha256 = Utils.toHexString(md.digest(cert.getEncoded())); 249 if (!certAmend.sha256.equals(sha256)) { 250 throw new IllegalStateException( 251 tr("Error adding certificate {0} - certificate fingerprint mismatch. Expected {1}, was {2}", 252 certAmend, certAmend.sha256, sha256)); 253 } 254 if (certificateIsMissing(keyStore, cert)) { 255 if (Logging.isDebugEnabled()) { 256 Logging.debug(tr("Adding certificate for TLS connections: {0}", cert.getSubjectX500Principal().getName())); 257 } 258 String alias = "josm:" + certAmend.filename; 259 keyStore.setCertificateEntry(alias, cert); 260 return true; 261 } 262 } 263 return false; 264 } 265 266 /** 267 * Check if the certificate is missing and needs to be added to the keystore. 268 * @param keyStore the keystore 269 * @param crt the certificate 270 * @return true, if the certificate is not contained in the keystore 271 * @throws InvalidAlgorithmParameterException if the keystore does not contain at least one trusted certificate entry 272 * @throws KeyStoreException if the keystore has not been initialized 273 */ 274 private static boolean certificateIsMissing(KeyStore keyStore, X509Certificate crt) 275 throws KeyStoreException, InvalidAlgorithmParameterException { 276 PKIXParameters params = new PKIXParameters(keyStore); 277 String id = crt.getSubjectX500Principal().getName(); 278 for (TrustAnchor ta : params.getTrustAnchors()) { 279 X509Certificate cert = ta.getTrustedCert(); 280 if (Objects.equals(id, cert.getSubjectX500Principal().getName())) 281 return false; 282 } 283 return true; 284 } 285}