/** * Copy all the files in a manifest from input to output. We set * the modification times in the output to a fixed time, so as to * reduce variation in the output file and make incremental OTAs * more efficient. */ private static void copyFiles(Manifest manifest, JarFile in_, ZipOutputStream out_, DateTime timestamp) { byte[] buffer = new byte[4096]; int num; IDictionary <String, Attributes> entries = manifest.Entries; List <String> names = new List <String>(entries.Keys); names.Sort(); foreach (String name in names) { JarEntry inEntry = in_.GetJarEntry(name); JarEntry outEntry = null; if (inEntry.CompressionMethod == CompressionMethod.Stored) { // Preserve the STORED method of the input entry. outEntry = new JarEntry(inEntry); } else { // Create a new entry so that the compressed len is recomputed. outEntry = new JarEntry(name); if (inEntry.Size > -1) { outEntry.Size = inEntry.Size; } } outEntry.DateTime = timestamp; out_.PutNextEntry(outEntry); Stream data = in_.GetInputStream(inEntry); while ((num = data.Read(buffer, 0, buffer.Length)) > 0) { out_.Write(buffer, 0, num); } out_.Flush(); } }
/** Add the SHA1 of every file to the manifest, creating it if necessary. */ private static Manifest addDigestsToManifest(JarFile jar) { Manifest input = jar.Manifest; Manifest output = new Manifest(); Attributes main = output.MainAttributes; if (input != null) { main.AddAll(input.MainAttributes); } else { main.Add("Manifest-Version", "1.0"); main.Add("Created-By", "1.0 (Android SignApk)"); } byte[] buffer = new byte[4096]; int num; IEnumerable <JarEntry> jes; if (input == null) { jes = jar.OrderBy(j => j.Name); } else { var entries = jar.ToDictionary(j => j.Name); var sortedEntries = new List <JarEntry>(); foreach (var entry in input.Entries) { sortedEntries.Add(entries[entry.Key]); } jes = sortedEntries; } foreach (JarEntry entry in jes) { HashAlgorithm md = HashAlgorithm.Create("SHA1"); String name = entry.Name; if (!entry.IsDirectory && !name.Equals(JarFile.MANIFEST_NAME) && !name.Equals(CERT_SF_NAME) && !name.Equals(CERT_RSA_NAME) && !name.Equals(OTACERT_NAME) && (stripPattern == null || !stripPattern.IsMatch(name))) { Stream data = jar.GetInputStream(entry); while ((num = data.Read(buffer, 0, buffer.Length)) > 0) { md.TransformBlock(buffer, 0, num, null, 0); } md.TransformFinalBlock(buffer, 0, 0); Attributes attr = null; if (input != null) { attr = input.GetAttributes(name); } attr = attr != null ? new Attributes(attr) : new Attributes(); attr.Add("SHA1-Digest", Convert.ToBase64String(md.Hash)); output.Entries.Add(name, attr); } } return(output); }