| 1 | /* -*-scala-*- |
| 2 | * |
| 3 | * Key distribution |
| 4 | * |
| 5 | * (c) 2018 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of the Trivial IP Encryption (TrIPE) Android app. |
| 11 | * |
| 12 | * TrIPE is free software: you can redistribute it and/or modify it under |
| 13 | * the terms of the GNU General Public License as published by the Free |
| 14 | * Software Foundation; either version 3 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | * |
| 17 | * TrIPE is distributed in the hope that it will be useful, but WITHOUT |
| 18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 20 | * for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with TrIPE. If not, see <https://www.gnu.org/licenses/>. |
| 24 | */ |
| 25 | |
| 26 | package uk.org.distorted.tripe; package object keys { |
| 27 | |
| 28 | /*----- Imports -----------------------------------------------------------*/ |
| 29 | |
| 30 | import scala.collection.mutable.HashMap; |
| 31 | |
| 32 | import java.io.{Closeable, File, IOException}; |
| 33 | import java.lang.{Long => JLong}; |
| 34 | import java.net.{URL, URLConnection}; |
| 35 | import java.text.SimpleDateFormat; |
| 36 | import java.util.Date; |
| 37 | import java.util.zip.GZIPInputStream; |
| 38 | |
| 39 | import sys.{SystemError, hashsz, runCommand}; |
| 40 | import sys.Errno.EEXIST; |
| 41 | import sys.FileImplicits._; |
| 42 | import sys.FileInfo.{DIR, REG}; |
| 43 | |
| 44 | import progress.{Eyecandy, SimpleModel, DataModel}; |
| 45 | |
| 46 | /*----- Useful regular expressions ----------------------------------------*/ |
| 47 | |
| 48 | private final val RX_COMMENT = """(?x) ^ \s* (?: \# .* )? $""".r; |
| 49 | private final val RX_KEYVAL = """(?x) ^ \s* |
| 50 | ([-\w]+) |
| 51 | (?:\s+(?!=)|\s*=\s*) |
| 52 | (|\S|\S.*\S) |
| 53 | \s* $""".r; |
| 54 | private final val RX_DOLLARSUBST = """(?x) \$ \{ ([-\w]+) \}""".r; |
| 55 | |
| 56 | private final val RX_PUBKEY = """(?x) ^ peer- (.*) \.pub $""".r; |
| 57 | |
| 58 | private final val RX_KEYINFO = """(?x) ^ ([^:]*) : \s* (\S.*) $""".r |
| 59 | private final val RX_KEYATTR = """(?x) ^ \s* |
| 60 | ([^\s=] | [^\s=][^=]*[^\s=]) |
| 61 | \s* = \s* |
| 62 | (\S.*) $""".r; |
| 63 | |
| 64 | /*----- Things that go wrong ----------------------------------------------*/ |
| 65 | |
| 66 | class ConfigSyntaxError(val file: String, val lno: Int, val msg: String) |
| 67 | extends Exception { |
| 68 | override def getMessage(): String = s"$file:$lno: $msg"; |
| 69 | } |
| 70 | |
| 71 | class ConfigDefaultFailed(val file: String, val dfltkey: String, |
| 72 | val badkey: String, val badval: String) |
| 73 | extends Exception { |
| 74 | override def getMessage(): String = |
| 75 | s"$file: can't default `$dfltkey' because " + |
| 76 | s"`$badval' is not a recognized value for `$badkey'"; |
| 77 | } |
| 78 | |
| 79 | class DefaultFailed(val key: String) extends Exception; |
| 80 | |
| 81 | /*----- Parsing a configuration -------------------------------------------*/ |
| 82 | |
| 83 | type Config = scala.collection.Map[String, String]; |
| 84 | |
| 85 | private val DEFAULTS: Seq[(String, Config => String)] = |
| 86 | Seq("repos-base" -> { _ => "tripe-keys.tar.gz" }, |
| 87 | "sig-base" -> { _ => "tripe-keys.sig-<SEQ>" }, |
| 88 | "repos-url" -> { conf => conf("base-url") + conf("repos-base") }, |
| 89 | "sig-url" -> { conf => conf("base-url") + conf("sig-base") }, |
| 90 | "kx" -> { _ => "dh" }, |
| 91 | "kx-genalg" -> { conf => conf("kx") match { |
| 92 | case alg@("dh" | "ec" | "x25519" | "x448") => alg |
| 93 | case _ => throw new DefaultFailed("kx") |
| 94 | } }, |
| 95 | "kx-expire" -> { _ => "now + 1 year" }, |
| 96 | "kx-warn-days" -> { _ => "28" }, |
| 97 | "bulk" -> { _ => "iiv" }, |
| 98 | "cipher" -> { conf => conf("bulk") match { |
| 99 | case "naclbox" => "salsa20" |
| 100 | case _ => "rijndael-cbc" |
| 101 | } }, |
| 102 | "hash" -> { _ => "sha256" }, |
| 103 | "mgf" -> { conf => conf("hash") + "-mgf" }, |
| 104 | "mac" -> { conf => conf("bulk") match { |
| 105 | case "naclbox" => "poly1305/128" |
| 106 | case _ => |
| 107 | val h = conf("hash"); |
| 108 | hashsz(h) match { |
| 109 | case -1 => throw new DefaultFailed("hash") |
| 110 | case hsz => s"${h}-hmac/${4*hsz}" |
| 111 | } |
| 112 | } }, |
| 113 | "sig" -> { conf => conf("kx") match { |
| 114 | case "dh" => "dsa" |
| 115 | case "ec" => "ecdsa" |
| 116 | case "x25519" => "ed25519" |
| 117 | case "x448" => "ed448" |
| 118 | case _ => throw new DefaultFailed("kx") |
| 119 | } }, |
| 120 | "sig-fresh" -> { _ => "always" }, |
| 121 | "fingerprint-hash" -> { _("hash") }); |
| 122 | |
| 123 | private def parseConfig(file: File): HashMap[String, String] = { |
| 124 | |
| 125 | /* Build the new configuration in a temporary place. */ |
| 126 | var m = HashMap[String, String](); |
| 127 | |
| 128 | /* Read the config file into our map. */ |
| 129 | file.withReader { in => |
| 130 | var lno = 1; |
| 131 | for (line <- lines(in)) { |
| 132 | line match { |
| 133 | case RX_COMMENT() => ok; |
| 134 | case RX_KEYVAL(key, value) => m(key) = value; |
| 135 | case _ => |
| 136 | throw new ConfigSyntaxError(file.getPath, lno, |
| 137 | "failed to parse line"); |
| 138 | } |
| 139 | lno += 1; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | /* Done. */ |
| 144 | m |
| 145 | } |
| 146 | |
| 147 | private def readConfig(file: File): Config = { |
| 148 | var m = parseConfig(file); |
| 149 | |
| 150 | /* Fill in defaults where things have been missed out. */ |
| 151 | for ((key, dflt) <- DEFAULTS) { |
| 152 | if (!(m contains key)) { |
| 153 | try { m(key) = dflt(m); } |
| 154 | catch { |
| 155 | case e: DefaultFailed => |
| 156 | throw new ConfigDefaultFailed(file.getPath, key, |
| 157 | e.key, m(e.key)); |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /* And we're done. */ |
| 163 | m |
| 164 | } |
| 165 | |
| 166 | /*----- Managing a key repository -----------------------------------------*/ |
| 167 | |
| 168 | def downloadToFile(file: File, url: URL, |
| 169 | maxlen: Long = Long.MaxValue, |
| 170 | ic: Eyecandy) { |
| 171 | ic.job(new SimpleModel(s"connecting to `$url'", -1)) { jr => |
| 172 | fetchURL(url, new URLFetchCallbacks { |
| 173 | val out = file.openForOutput(); |
| 174 | private def toobig() { |
| 175 | throw new KeyConfigException( |
| 176 | s"remote file `$url' is suspiciously large"); |
| 177 | } |
| 178 | var totlen: Long = 0; |
| 179 | override def preflight(conn: URLConnection) { |
| 180 | totlen = conn.getContentLength; |
| 181 | if (totlen > maxlen) toobig(); |
| 182 | jr.change(new SimpleModel(s"downloading `$url'", totlen) |
| 183 | with DataModel, |
| 184 | 0); |
| 185 | } |
| 186 | override def done(win: Boolean) { out.close(); } |
| 187 | def write(buf: Array[Byte], n: Int, len: Long) { |
| 188 | if (len + n > maxlen) toobig(); |
| 189 | out.write(buf, 0, n); |
| 190 | jr.step(len + n); |
| 191 | } |
| 192 | }) |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | /* Lifecycle notes |
| 197 | * |
| 198 | * -> empty |
| 199 | * |
| 200 | * insert config file via URL or something |
| 201 | * |
| 202 | * -> pending (pending/tripe-keys.conf) |
| 203 | * |
| 204 | * verify master key fingerprint (against barcode?) |
| 205 | * |
| 206 | * -> confirmed (live/tripe-keys.conf; no live/repos) |
| 207 | * -> live (live/...) |
| 208 | * |
| 209 | * download package |
| 210 | * extract contents |
| 211 | * verify signature |
| 212 | * build keyrings |
| 213 | * build peer config |
| 214 | * rename tmp -> new |
| 215 | * |
| 216 | * -> updating (live/...; new/...) |
| 217 | * |
| 218 | * rename old repository aside |
| 219 | * |
| 220 | * -> committing (old/...; new/...) |
| 221 | * |
| 222 | * rename verified repository |
| 223 | * |
| 224 | * -> live (live/...) |
| 225 | * |
| 226 | * (delete old/) |
| 227 | */ |
| 228 | |
| 229 | class RepositoryStateException(val state: Repository.State.Value, |
| 230 | msg: String) |
| 231 | extends Exception(msg); |
| 232 | |
| 233 | class KeyConfigException(msg: String) extends Exception(msg); |
| 234 | |
| 235 | private def launderFingerprint(fp: String): String = |
| 236 | fp filter { _.isLetterOrDigit }; |
| 237 | |
| 238 | private def fingerprintsEqual(a: String, b: String) = |
| 239 | launderFingerprint(a) == launderFingerprint(b); |
| 240 | |
| 241 | private def keyFingerprint(kr: File, tag: String, hash: String): String = { |
| 242 | val (out, _) = runCommand("key", "-k", kr.getPath, "fingerprint", |
| 243 | "-a", hash, "-f", "-secret", tag); |
| 244 | nextToken(out) match { |
| 245 | case Some((fp, _)) => fp |
| 246 | case _ => |
| 247 | throw new IOException("unexpected output from `key fingerprint'"); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | private def checkIdent(id: String) { |
| 252 | if (id exists { ch => ch == ':' || ch == '.' || ch.isWhitespace }) |
| 253 | throw new IllegalArgumentException(s"bad key tag `$id'"); |
| 254 | } |
| 255 | |
| 256 | object Repository { |
| 257 | object State extends Enumeration { |
| 258 | val Empty, Pending, Confirmed, Updating, Committing, Live = Value; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | def checkConfigSanity(file: File, ic: Eyecandy) { |
| 263 | ic.operation("checking new configuration") { _ => |
| 264 | |
| 265 | /* Make sure we can read and understand the file. */ |
| 266 | val conf = readConfig(file); |
| 267 | |
| 268 | /* Make sure there are entries which we can use to update. This won't |
| 269 | * guarantee that we can reliably update, but it will help. |
| 270 | */ |
| 271 | conf("repos-url"); conf("sig-url"); |
| 272 | conf("fingerprint-hash"); conf("sig-fresh"); |
| 273 | conf("master-sequence"); conf("hk-master"); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | private val keydatefmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss z"); |
| 278 | class PrivateKey private[keys](repo: Repository, dir: File) { |
| 279 | private[this] lazy val keyring = dir/"keyring"; |
| 280 | private[this] lazy val meta = parseConfig(dir/"meta"); |
| 281 | lazy val tag = meta("tag"); |
| 282 | lazy val time = datefmt synchronized { datefmt.parse(meta("time")); }; |
| 283 | lazy val fingerprint = keyFingerprint(keyring, tag, |
| 284 | repo.config("fingerprint-hash")); |
| 285 | |
| 286 | def remove() { dir.rmTree(); } |
| 287 | |
| 288 | private[this] lazy val (info, _attr) = { |
| 289 | val m = Map.newBuilder[String, String]; |
| 290 | val a = Map.newBuilder[String, String]; |
| 291 | val (out, _) = runCommand("key", "-k", keyring.getPath, |
| 292 | "list", "-vv", tag); |
| 293 | val lines = out.lines; |
| 294 | while (lines.hasNext) lines.next match { |
| 295 | case "attributes:" => |
| 296 | while (lines.hasNext) lines.next match { |
| 297 | case RX_KEYATTR(k, v) => a += k -> v; |
| 298 | case line => throw new IOException( |
| 299 | s"unexpected output from `key list': $line"); |
| 300 | } |
| 301 | case RX_KEYINFO(k, v) => |
| 302 | m += k -> v; |
| 303 | case line => throw new IOException( |
| 304 | s"unexpected output from `key list': $line"); |
| 305 | } |
| 306 | (m.result, a.result) |
| 307 | } |
| 308 | |
| 309 | lazy val expires = info("expiry") match { |
| 310 | case "forever" => None |
| 311 | case d => Some(keydatefmt synchronized { keydatefmt.parse(d) }) |
| 312 | } |
| 313 | lazy val ty = info("type"); |
| 314 | lazy val comment = info("comment"); |
| 315 | lazy val keyid = { |
| 316 | |
| 317 | /* Ugh. Using `Int' throws an exception on words whose top bit is set |
| 318 | * because Java doesn't have proper unsigned integers. There's |
| 319 | * `parseUnsignedInt' in Java 1.8, but that limits our Android targets. |
| 320 | * And Scala has put its own `Long' object in the way of Java's so we |
| 321 | * need this circumolution. |
| 322 | */ |
| 323 | (JLong.parseLong(info("keyid"), 16)&0xffffffff).toInt; |
| 324 | } |
| 325 | lazy val attr = _attr; |
| 326 | } |
| 327 | |
| 328 | class Repository(val root: File) extends Closeable { |
| 329 | import Repository.State.{Value => State, _}; |
| 330 | |
| 331 | /* Important directories and files. */ |
| 332 | private[this] val configdir = root/"config"; |
| 333 | private[this] val livedir = configdir/"live"; |
| 334 | private[this] val livereposdir = livedir/"repos"; |
| 335 | private[this] val newdir = configdir/"new"; |
| 336 | private[this] val olddir = configdir/"old"; |
| 337 | private[this] val pendingdir = configdir/"pending"; |
| 338 | private[this] val tmpdir = root/"tmp"; |
| 339 | private[this] val keysdir = root/"keys"; |
| 340 | |
| 341 | /* Take out a lock in case of other instances. */ |
| 342 | private[this] var open = false; |
| 343 | private[this] val lock = { |
| 344 | root.mkdirNew_!(); |
| 345 | open = true; |
| 346 | (root/"lk").lock_!() |
| 347 | } |
| 348 | def close() { lock.close(); open = false; } |
| 349 | private[this] def checkLocked() |
| 350 | { if (!open) throw new IllegalStateException("repository is unlocked"); } |
| 351 | |
| 352 | /* Maintain a cache of some repository state. */ |
| 353 | private var _state: State = null; |
| 354 | private var _config: Config = null; |
| 355 | private def invalidate() { |
| 356 | _state = null; |
| 357 | _config = null; |
| 358 | } |
| 359 | |
| 360 | def state: State = { |
| 361 | /* Determine the current repository state. */ |
| 362 | |
| 363 | if (_state == null) |
| 364 | _state = if (livedir.isdir_!) { |
| 365 | if (!livereposdir.isdir_!) Confirmed |
| 366 | else if (newdir.isdir_!) Updating |
| 367 | else Live |
| 368 | } else { |
| 369 | if (newdir.isdir_!) Committing |
| 370 | else if (pendingdir.isdir_!) Pending |
| 371 | else Empty |
| 372 | } |
| 373 | |
| 374 | _state |
| 375 | } |
| 376 | |
| 377 | def checkState(wanted: State*) { |
| 378 | /* Ensure we're in a particular state. */ |
| 379 | checkLocked(); |
| 380 | val st = state; |
| 381 | if (wanted.forall(_ != st)) { |
| 382 | throw new RepositoryStateException(st, s"Repository is $st, not " + |
| 383 | oxford("or", |
| 384 | wanted.map(_.toString))); |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | def cleanup(ic: Eyecandy) { |
| 389 | |
| 390 | /* If we're part-way through an update then back out or press forward. */ |
| 391 | state match { |
| 392 | |
| 393 | case Updating => |
| 394 | /* We have a new tree allegedly ready, but the current one is still |
| 395 | * in place. It seems safer to zap the new one here, but we could go |
| 396 | * either way. |
| 397 | */ |
| 398 | |
| 399 | ic.operation("rolling back failed update") |
| 400 | { _ => newdir.rmTree(); } |
| 401 | invalidate(); // should move back to `Live' or `Confirmed' |
| 402 | |
| 403 | case Committing => |
| 404 | /* We have a new tree ready, and an old one moved aside. We're going |
| 405 | * to have to move one of them. Let's try committing the new tree. |
| 406 | */ |
| 407 | |
| 408 | ic.operation("committing interrupted update") |
| 409 | { _ => newdir.rename_!(livedir); } |
| 410 | invalidate(); // should move on to `Live' |
| 411 | |
| 412 | case _ => |
| 413 | /* Other states are stable. */ |
| 414 | ok; |
| 415 | } |
| 416 | |
| 417 | /* Now work through the things in our area of the filesystem and zap the |
| 418 | * ones which don't belong. In particular, this will always erase |
| 419 | * `tmpdir'. |
| 420 | */ |
| 421 | ic.operation("cleaning up configuration area") { or => |
| 422 | val st = state; |
| 423 | root foreachFile { f => f.getName match { |
| 424 | case "lk" | "keys" => ok; |
| 425 | case "config" => configdir foreachFile { f => (f.getName, st) match { |
| 426 | case ("live", Live | Confirmed) => ok; |
| 427 | case ("pending", Pending) => ok; |
| 428 | case (_, Updating | Committing) => |
| 429 | unreachable(s"unexpectedly still in `$st' state"); |
| 430 | case _ => or.step(s"delete `$f'"); f.rmTree(); |
| 431 | } } |
| 432 | case _ => or.step(s"delete `$f'"); f.rmTree(); |
| 433 | } } |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | def destroy(ic: Eyecandy) { |
| 438 | /* Clear out the entire repository. Everything. It's all gone. */ |
| 439 | ic.operation("clearing configuration") |
| 440 | { _ => root foreachFile { f => if (f.getName != "lk") f.rmTree(); } } |
| 441 | } |
| 442 | |
| 443 | def clearTmp() { |
| 444 | /* Arrange to have an empty `tmpdir'. */ |
| 445 | tmpdir.rmTree(); |
| 446 | tmpdir.mkdir_!(); |
| 447 | } |
| 448 | |
| 449 | def config: Config = { |
| 450 | /* Return the repository configuration. */ |
| 451 | |
| 452 | checkLocked(); |
| 453 | if (_config == null) { |
| 454 | |
| 455 | /* Firstly, decide where to find the configuration file. */ |
| 456 | checkState(Pending, Confirmed, Live); |
| 457 | val dir = state match { |
| 458 | case Live | Confirmed => livedir |
| 459 | case Pending => pendingdir |
| 460 | case _ => ??? |
| 461 | } |
| 462 | |
| 463 | /* And then read the configuration. */ |
| 464 | _config = readConfig(dir/"tripe-keys.conf"); |
| 465 | } |
| 466 | |
| 467 | _config |
| 468 | } |
| 469 | |
| 470 | def fetchConfig(url: URL, ic: Eyecandy) { |
| 471 | /* Fetch an initial configuration file from a given URL. */ |
| 472 | |
| 473 | checkState(Empty); |
| 474 | clearTmp(); |
| 475 | |
| 476 | val conffile = tmpdir/"tripe-keys.conf"; |
| 477 | downloadToFile(conffile, url, 16*1024, ic); |
| 478 | checkConfigSanity(conffile, ic); |
| 479 | configdir.mkdirNew_!(); |
| 480 | ic.operation("committing configuration") |
| 481 | { _ => tmpdir.rename_!(pendingdir); } |
| 482 | invalidate(); // should move to `Pending' |
| 483 | cleanup(ic); |
| 484 | } |
| 485 | |
| 486 | def confirm(ic: Eyecandy) { |
| 487 | /* The user has approved the master key fingerprint in the `Pending' |
| 488 | * configuration. Advance to `Confirmed'. |
| 489 | */ |
| 490 | |
| 491 | checkState(Pending); |
| 492 | ic.operation("confirming configuration") |
| 493 | { _ => pendingdir.rename_!(livedir); } |
| 494 | invalidate(); // should move to `Confirmed' |
| 495 | } |
| 496 | |
| 497 | def update(ic: Eyecandy) { |
| 498 | /* Update the repository from the master. |
| 499 | * |
| 500 | * Fetch a (possibly new) archive; unpack it; verify the master key |
| 501 | * against the known fingerprint; and check the signature on the bundle. |
| 502 | */ |
| 503 | |
| 504 | cleanup(ic); |
| 505 | checkState(Confirmed, Live); |
| 506 | val conf = config; |
| 507 | clearTmp(); |
| 508 | |
| 509 | /* First thing is to download the tarball and signature. */ |
| 510 | val tarfile = tmpdir/"tripe-keys.tar.gz"; |
| 511 | downloadToFile(tarfile, new URL(conf("repos-url")), 256*1024, ic); |
| 512 | val sigfile = tmpdir/"tripe-keys.sig"; |
| 513 | val seq = conf("master-sequence"); |
| 514 | downloadToFile(sigfile, |
| 515 | new URL(conf("sig-url").replaceAllLiterally("<SEQ>", |
| 516 | seq)), |
| 517 | 4*1024, ic); |
| 518 | |
| 519 | /* Unpack the tarball. Carefully. */ |
| 520 | val unpkdir = tmpdir/"unpk"; |
| 521 | ic.operation("unpacking archive") { or => |
| 522 | unpkdir.mkdir_!(); |
| 523 | withCleaner { clean => |
| 524 | val tar = new TarFile(new GZIPInputStream(tarfile.open())); |
| 525 | clean { tar.close(); } |
| 526 | for (e <- tar) { |
| 527 | |
| 528 | /* Check the filename to make sure it's not evil. */ |
| 529 | if (e.name(0) == '/' || e.name.split('/').exists { _ == ".." }) { |
| 530 | throw new KeyConfigException( |
| 531 | s"invalid path `${e.name}' in tarball"); |
| 532 | } |
| 533 | |
| 534 | /* Report on progress. */ |
| 535 | or.step(s"entry `${e.name}'"); |
| 536 | |
| 537 | /* Find out where this file points. */ |
| 538 | val f = unpkdir/e.name; |
| 539 | |
| 540 | /* Unpack it. */ |
| 541 | e.typ match { |
| 542 | case DIR => |
| 543 | /* A directory. Create it if it doesn't exist already. */ |
| 544 | |
| 545 | f.mkdirNew_!(); |
| 546 | |
| 547 | case REG => |
| 548 | /* A regular file. Write stuff to it. */ |
| 549 | |
| 550 | e.withStream { in => |
| 551 | f.withOutput { out => |
| 552 | for ((b, n) <- blocks(in)) out.write(b, 0, n); |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | case ty => |
| 557 | /* Something else. Be paranoid and reject it. */ |
| 558 | |
| 559 | throw new KeyConfigException( |
| 560 | s"entry `${e.name}' has unexpected object type $ty"); |
| 561 | } |
| 562 | } |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | /* There ought to be a file in here called `repos/master.pub'. */ |
| 567 | val reposdir = unpkdir/"repos"; |
| 568 | val masterfile = reposdir/"master.pub"; |
| 569 | |
| 570 | if (!reposdir.isdir_!) |
| 571 | throw new KeyConfigException("missing `repos/' directory"); |
| 572 | if (!masterfile.isreg_!) |
| 573 | throw new KeyConfigException("missing `repos/master.pub' file"); |
| 574 | val mastertag = s"master-$seq"; |
| 575 | |
| 576 | /* Fetch the master key's fingerprint. */ |
| 577 | ic.operation("checking master key fingerprint") { _ => |
| 578 | val foundfp = keyFingerprint(masterfile, mastertag, |
| 579 | conf("fingerprint-hash")); |
| 580 | val wantfp = conf("hk-master"); |
| 581 | if (!fingerprintsEqual(wantfp, foundfp)) { |
| 582 | throw new KeyConfigException( |
| 583 | s"master key #$seq has wrong fingerprint: " + |
| 584 | s"expected $wantfp but found $foundfp"); |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | /* Check the archive signature. */ |
| 589 | ic.operation("verifying archive signature") { or => |
| 590 | runCommand("catsign", "-k", masterfile.getPath, "verify", "-aqC", |
| 591 | "-k", mastertag, "-t", conf("sig-fresh"), |
| 592 | sigfile.getPath, tarfile.getPath); |
| 593 | } |
| 594 | |
| 595 | /* Confirm that the configuration in the new archive is sane. */ |
| 596 | checkConfigSanity(unpkdir/"tripe-keys.conf", ic); |
| 597 | |
| 598 | /* Build the public keyring. (Observe the quadratic performance.) */ |
| 599 | ic.operation("collecting public keys") { or => |
| 600 | val pubkeys = unpkdir/"keyring.pub"; |
| 601 | pubkeys.remove_!(); |
| 602 | reposdir foreachFile { file => file.getName match { |
| 603 | case RX_PUBKEY(peer) if file.isreg_! => |
| 604 | or.step(peer); |
| 605 | runCommand("key", "-k", pubkeys.getPath, "merge", file.getPath); |
| 606 | case _ => ok; |
| 607 | } } |
| 608 | (unpkdir/"keyring.pub.old").remove_!(); |
| 609 | } |
| 610 | |
| 611 | /* Now we just have to juggle the files about. */ |
| 612 | ic.operation("committing new configuration") { _ => |
| 613 | unpkdir.rename_!(newdir); |
| 614 | livedir.rename_!(olddir); |
| 615 | newdir.rename_!(livedir); |
| 616 | } |
| 617 | |
| 618 | /* All done. */ |
| 619 | invalidate(); // should move to `Live' |
| 620 | cleanup(ic); |
| 621 | } |
| 622 | |
| 623 | def generateKey(tag: String, label: String, ic: Eyecandy) { |
| 624 | checkIdent(tag); |
| 625 | if (label.exists { _ == '/' }) |
| 626 | throw new IllegalArgumentException(s"invalid label string `$label'"); |
| 627 | if ((keysdir/label).isdir_!) |
| 628 | throw new IllegalArgumentException(s"key `$label' already exists"); |
| 629 | |
| 630 | cleanup(ic); |
| 631 | checkState(Live); |
| 632 | val conf = config; |
| 633 | clearTmp(); |
| 634 | |
| 635 | val now = datefmt synchronized { datefmt.format(new Date) }; |
| 636 | val kr = tmpdir/"keyring"; |
| 637 | val pub = tmpdir/s"peer-$tag.pub"; |
| 638 | val param = livereposdir/"param"; |
| 639 | |
| 640 | keysdir.mkdirNew_!(); |
| 641 | |
| 642 | ic.operation("fetching key-generation parameters") { _ => |
| 643 | runCommand("key", "-k", kr.getPath, "merge", param.getPath); |
| 644 | } |
| 645 | ic.operation("generating new key") { _ => |
| 646 | runCommand("key", "-k", kr.getPath, "add", |
| 647 | "-a", conf("kx-genalg"), "-p", "param", |
| 648 | "-e", conf("kx-expire"), "-t", tag, "tripe"); |
| 649 | } |
| 650 | ic.operation("extracting public key") { _ => |
| 651 | runCommand("key", "-k", kr.getPath, "extract", |
| 652 | "-f", "-secret", pub.getPath, tag); |
| 653 | } |
| 654 | ic.operation("writing metadata") { _ => |
| 655 | tmpdir/"meta" withWriter { w => |
| 656 | w.write(s"tag = $tag\n"); |
| 657 | w.write(s"time = $now\n"); |
| 658 | } |
| 659 | } |
| 660 | ic.operation("installing new key") { _ => |
| 661 | tmpdir.rename_!(keysdir/label); |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | def key(label: String): PrivateKey = new PrivateKey(this, keysdir/label); |
| 666 | def keyLabels: Seq[String] = (keysdir.files_! map { _.getName }).toStream; |
| 667 | def keys: Seq[PrivateKey] = keyLabels map { k => key(k) }; |
| 668 | } |
| 669 | |
| 670 | /*----- That's all, folks -------------------------------------------------*/ |
| 671 | |
| 672 | } |