Adjust Uri host parsing to use last instead of first @.
Malformed authority segments can currently cause the parser to produce
a hostname that doesn't match the hostname produced by the WHATWG URL
parsing algorithm* used by browsers, which means that a URL could be seen
as having a "safe" host when checked by an Android app but actually visit
a different host when passed to a browser. The WHATWG URL parsing
algorithm always produces a hostname based on the last @ in the authority
segment, so we do the same.
* https://url.spec.whatwg.org/#authority-state resets the "buffer", which
is being used to build up the host name, each time an @ is found, so it
has the effect of using the content between the final @ and the end
of the authority section as the hostname.
Bug: 68341964
Test: vogar android.net.UriTest (on NYC branch)
Test: cts -m CtsNetTestCases (on NYC branch)
Change-Id: Idca79f35a886de042c94d6ab66787c2e98ac8376
(cherry picked from commit cd6228dd377b2a0caa02a1e6df92f3d9ae702a95)
diff --git a/core/java/android/net/Uri.java b/core/java/android/net/Uri.java
index d5377c7..9edcc0e 100644
--- a/core/java/android/net/Uri.java
+++ b/core/java/android/net/Uri.java
@@ -1066,7 +1066,7 @@
return null;
}
- int end = authority.indexOf('@');
+ int end = authority.lastIndexOf('@');
return end == NOT_FOUND ? null : authority.substring(0, end);
}
@@ -1090,7 +1090,7 @@
}
// Parse out user info and then port.
- int userInfoSeparator = authority.indexOf('@');
+ int userInfoSeparator = authority.lastIndexOf('@');
int portSeparator = authority.indexOf(':', userInfoSeparator);
String encodedHost = portSeparator == NOT_FOUND
@@ -1116,7 +1116,7 @@
// Make sure we look for the port separtor *after* the user info
// separator. We have URLs with a ':' in the user info.
- int userInfoSeparator = authority.indexOf('@');
+ int userInfoSeparator = authority.lastIndexOf('@');
int portSeparator = authority.indexOf(':', userInfoSeparator);
if (portSeparator == NOT_FOUND) {
diff --git a/core/tests/coretests/src/android/net/UriTest.java b/core/tests/coretests/src/android/net/UriTest.java
index 6fa28b1..27b7f9e 100644
--- a/core/tests/coretests/src/android/net/UriTest.java
+++ b/core/tests/coretests/src/android/net/UriTest.java
@@ -187,6 +187,11 @@
uri = Uri.parse("http://localhost");
assertEquals("localhost", uri.getHost());
assertEquals(-1, uri.getPort());
+
+ uri = Uri.parse("http://a:a@example.com:a@example2.com/path");
+ assertEquals("a:a@example.com:a@example2.com", uri.getAuthority());
+ assertEquals("example2.com", uri.getHost());
+ assertEquals(-1, uri.getPort());
}
@SmallTest
