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Further restrict user agent pattern matching (#120) 

* Further restrict user agent pattern matching

* Add static qualifier to method
This commit is contained in:
Ehren Kret 2020-08-04 12:58:16 -05:00 committed by GitHub
parent 97c9a9b0b0
commit 57e1339230
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2 changed files with 16 additions and 7 deletions
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7
service/src/main/java/org/whispersystems/textsecuregcm/metrics/UserAgentTagUtil.java
View File

@ -6,7 +6,6 @@ import org.whispersystems.textsecuregcm.util.Pair;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@ -22,9 +21,9 @@ public class UserAgentTagUtil {
static final List<Tag> UNRECOGNIZED_TAGS = List.of(Tag.of(PLATFORM_TAG, "unrecognized"), Tag.of(VERSION_TAG, "unrecognized"));
private static final Map<String, Pattern> PATTERNS_BY_PLATFORM = Map.of(
"android", Pattern.compile("^Signal-Android (4[^ ]+).*$", Pattern.CASE_INSENSITIVE),
"desktop", Pattern.compile("^Signal Desktop (1[^ ]+).*$", Pattern.CASE_INSENSITIVE),
"ios", Pattern.compile("^Signal/(3[^ ]+) \\(.*ios.*\\)$", Pattern.CASE_INSENSITIVE));
"android", Pattern.compile("^Signal-Android (4\\.\\d+\\.\\d+(?:\\.\\d+)?)(?:\\s.*)?$", Pattern.CASE_INSENSITIVE),
"desktop", Pattern.compile("^Signal Desktop (1\\.\\d+\\.\\d+(?:\\.\\d+)?)(?:\\s.*)?$", Pattern.CASE_INSENSITIVE),
"ios", Pattern.compile("^Signal/(3\\.\\d+\\.\\d+(?:\\.\\d+)?) \\(.*ios.*\\)(?:\\s.*)?$", Pattern.CASE_INSENSITIVE));
static final int MAX_VERSIONS = 1_000;
private static final Set<Pair<String, String>> SEEN_VERSIONS = new HashSet<>();

16
service/src/test/java/org/whispersystems/textsecuregcm/metrics/UserAgentTagUtilTest.java
View File

@ -22,17 +22,27 @@ public class UserAgentTagUtilTest {
new HashSet<>(UserAgentTagUtil.getUserAgentTags(userAgent)));
}
private static List<Tag> platformVersionTags(String platform, String version) {
return List.of(Tag.of(UserAgentTagUtil.PLATFORM_TAG, platform), Tag.of(UserAgentTagUtil.VERSION_TAG, version));
}
@SuppressWarnings("unused")
private Object argumentsForTestGetUserAgentTags() {
return new Object[] {
new Object[] { "This is obviously not a reasonable User-Agent string.", UserAgentTagUtil.UNRECOGNIZED_TAGS },
new Object[] { null, UserAgentTagUtil.UNRECOGNIZED_TAGS },
new Object[] { "Signal-Android 4.53.7 (Android 8.1)", List.of(Tag.of(UserAgentTagUtil.PLATFORM_TAG, "android"), Tag.of(UserAgentTagUtil.VERSION_TAG, "4.53.7")) },
new Object[] { "Signal Desktop 1.2.3", List.of(Tag.of(UserAgentTagUtil.PLATFORM_TAG, "desktop"), Tag.of(UserAgentTagUtil.VERSION_TAG, "1.2.3")) },
new Object[] { "Signal/3.9.0 (iPhone; iOS 12.2; Scale/3.00)", List.of(Tag.of(UserAgentTagUtil.PLATFORM_TAG, "ios"), Tag.of(UserAgentTagUtil.VERSION_TAG, "3.9.0")) },
new Object[] { "Signal-Android 4.53.7 (Android 8.1)", platformVersionTags("android", "4.53.7") },
new Object[] { "Signal Desktop 1.2.3", platformVersionTags("desktop", "1.2.3") },
new Object[] { "Signal/3.9.0 (iPhone; iOS 12.2; Scale/3.00)", platformVersionTags("ios", "3.9.0") },
new Object[] { "Signal-Android 1.2.3 (Android 8.1)", UserAgentTagUtil.UNRECOGNIZED_TAGS },
new Object[] { "Signal Desktop 3.9.0", UserAgentTagUtil.UNRECOGNIZED_TAGS },
new Object[] { "Signal/4.53.7 (iPhone; iOS 12.2; Scale/3.00)", UserAgentTagUtil.UNRECOGNIZED_TAGS },
new Object[] { "Signal-Android 4.68.3 (Android 9)", platformVersionTags("android", "4.68.3") },
new Object[] { "Signal-Android 1.2.3 (Android 4.3)", UserAgentTagUtil.UNRECOGNIZED_TAGS },
new Object[] { "Signal-Android 4.68.3.0-bobsbootlegclient", UserAgentTagUtil.UNRECOGNIZED_TAGS },
new Object[] { "Signal Desktop 1.22.45-foo-0", UserAgentTagUtil.UNRECOGNIZED_TAGS },
new Object[] { "Signal Desktop 1.34.5-beta.1-fakeclientemporium", UserAgentTagUtil.UNRECOGNIZED_TAGS },
new Object[] { "Signal Desktop 1.32.0-beta.3", UserAgentTagUtil.UNRECOGNIZED_TAGS },
};
}