[tor-commits] [tor-browser/tor-browser-91.2.0esr-11.0-1] Bug 19121: reinstate the update.xml hash check
sysrqb at torproject.org
sysrqb at torproject.org
Wed Oct 6 13:32:11 UTC 2021
commit 5416c5f0ad9883100df4035930437da7d039d5c6
Author: Kathy Brade <brade at pearlcrescent.com>
Date: Mon Apr 23 15:22:57 2018 -0400
Bug 19121: reinstate the update.xml hash check
Revert most changes from Mozilla Bug 1373267 "Remove hashFunction and
hashValue attributes from nsIUpdatePatch and code related to these
attributes." Changes to the tests were not reverted; the tests have
been changed significantly and we do not run automated updater tests
for Tor Browser at this time.
Also partial revert of commit f1241db6986e4b54473a1ed870f7584c75d51122.
Revert the nsUpdateService.js changes from Mozilla Bug 862173 "don't
verify mar file hash when using mar signing to verify the mar file
(lessens main thread I/O)."
Changes to the tests were not reverted; the tests have been changed
significantly and we do not run automated updater tests for
Tor Browser at this time.
We kept the addition to the AppConstants API in case other JS code
references it in the future.
---
toolkit/modules/AppConstants.jsm | 7 ++++
toolkit/mozapps/update/UpdateService.jsm | 63 ++++++++++++++++++++++++++++-
toolkit/mozapps/update/UpdateTelemetry.jsm | 1 +
toolkit/mozapps/update/nsIUpdateService.idl | 11 +++++
4 files changed, 81 insertions(+), 1 deletion(-)
diff --git a/toolkit/modules/AppConstants.jsm b/toolkit/modules/AppConstants.jsm
index ea10dc97535d..3cb1518f2ab3 100644
--- a/toolkit/modules/AppConstants.jsm
+++ b/toolkit/modules/AppConstants.jsm
@@ -212,6 +212,13 @@ this.AppConstants = Object.freeze({
false,
#endif
+ MOZ_VERIFY_MAR_SIGNATURE:
+#ifdef MOZ_VERIFY_MAR_SIGNATURE
+ true,
+#else
+ false,
+#endif
+
MOZ_MAINTENANCE_SERVICE:
#ifdef MOZ_MAINTENANCE_SERVICE
true,
diff --git a/toolkit/mozapps/update/UpdateService.jsm b/toolkit/mozapps/update/UpdateService.jsm
index 4d1b1c59eff5..10581c785074 100644
--- a/toolkit/mozapps/update/UpdateService.jsm
+++ b/toolkit/mozapps/update/UpdateService.jsm
@@ -969,6 +969,20 @@ function LOG(string) {
}
}
+/**
+ * Convert a string containing binary values to hex.
+ */
+function binaryToHex(input) {
+ var result = "";
+ for (var i = 0; i < input.length; ++i) {
+ var hex = input.charCodeAt(i).toString(16);
+ if (hex.length == 1)
+ hex = "0" + hex;
+ result += hex;
+ }
+ return result;
+}
+
/**
* Gets the specified directory at the specified hierarchy under the
* update root directory and creates it if it doesn't exist.
@@ -1988,6 +2002,8 @@ function UpdatePatch(patch) {
}
break;
case "finalURL":
+ case "hashFunction":
+ case "hashValue":
case "state":
case "type":
case "URL":
@@ -2007,6 +2023,8 @@ UpdatePatch.prototype = {
// over writing nsIUpdatePatch attributes.
_attrNames: [
"errorCode",
+ "hashFunction",
+ "hashValue",
"finalURL",
"selected",
"size",
@@ -2020,6 +2038,8 @@ UpdatePatch.prototype = {
*/
serialize: function UpdatePatch_serialize(updates) {
var patch = updates.createElementNS(URI_UPDATE_NS, "patch");
+ patch.setAttribute("hashFunction", this.hashFunction);
+ patch.setAttribute("hashValue", this.hashValue);
patch.setAttribute("size", this.size);
patch.setAttribute("type", this.type);
patch.setAttribute("URL", this.URL);
@@ -5122,7 +5142,42 @@ Downloader.prototype = {
}
LOG("Downloader:_verifyDownload downloaded size == expected size.");
- return true;
+ let fileStream = Cc["@mozilla.org/network/file-input-stream;1"].
+ createInstance(Ci.nsIFileInputStream);
+ fileStream.init(destination, FileUtils.MODE_RDONLY, FileUtils.PERMS_FILE, 0);
+
+ let digest;
+ try {
+ let hash = Cc["@mozilla.org/security/hash;1"].
+ createInstance(Ci.nsICryptoHash);
+ var hashFunction = Ci.nsICryptoHash[this._patch.hashFunction.toUpperCase()];
+ if (hashFunction == undefined) {
+ throw Cr.NS_ERROR_UNEXPECTED;
+ }
+ hash.init(hashFunction);
+ hash.updateFromStream(fileStream, -1);
+ // NOTE: For now, we assume that the format of _patch.hashValue is hex
+ // encoded binary (such as what is typically output by programs like
+ // sha1sum). In the future, this may change to base64 depending on how
+ // we choose to compute these hashes.
+ digest = binaryToHex(hash.finish(false));
+ } catch (e) {
+ LOG("Downloader:_verifyDownload - failed to compute hash of the " +
+ "downloaded update archive");
+ digest = "";
+ }
+
+ fileStream.close();
+
+ if (digest == this._patch.hashValue.toLowerCase()) {
+ LOG("Downloader:_verifyDownload hashes match.");
+ return true;
+ }
+
+ LOG("Downloader:_verifyDownload hashes do not match. ");
+ AUSTLMY.pingDownloadCode(this.isCompleteUpdate,
+ AUSTLMY.DWNLD_ERR_VERIFY_NO_HASH_MATCH);
+ return false;
},
/**
@@ -5719,6 +5774,9 @@ Downloader.prototype = {
" is higher than patch size: " +
this._patch.size
);
+ // It's important that we use a different code than
+ // NS_ERROR_CORRUPTED_CONTENT so that tests can verify the difference
+ // between a hash error and a wrong download error.
AUSTLMY.pingDownloadCode(
this.isCompleteUpdate,
AUSTLMY.DWNLD_ERR_PATCH_SIZE_LARGER
@@ -5737,6 +5795,9 @@ Downloader.prototype = {
" is not equal to expected patch size: " +
this._patch.size
);
+ // It's important that we use a different code than
+ // NS_ERROR_CORRUPTED_CONTENT so that tests can verify the difference
+ // between a hash error and a wrong download error.
AUSTLMY.pingDownloadCode(
this.isCompleteUpdate,
AUSTLMY.DWNLD_ERR_PATCH_SIZE_NOT_EQUAL
diff --git a/toolkit/mozapps/update/UpdateTelemetry.jsm b/toolkit/mozapps/update/UpdateTelemetry.jsm
index dae76e09acd0..df5b8917970e 100644
--- a/toolkit/mozapps/update/UpdateTelemetry.jsm
+++ b/toolkit/mozapps/update/UpdateTelemetry.jsm
@@ -192,6 +192,7 @@ var AUSTLMY = {
DWNLD_ERR_VERIFY_NO_REQUEST: 13,
DWNLD_ERR_VERIFY_PATCH_SIZE_NOT_EQUAL: 14,
DWNLD_ERR_WRITE_FAILURE: 15,
+ DWNLD_ERR_VERIFY_NO_HASH_MATCH: 16,
// Temporary failure code to see if there are failures without an update phase
DWNLD_UNKNOWN_PHASE_ERR_WRITE_FAILURE: 40,
diff --git a/toolkit/mozapps/update/nsIUpdateService.idl b/toolkit/mozapps/update/nsIUpdateService.idl
index 78929e1cef44..5db1db71fc81 100644
--- a/toolkit/mozapps/update/nsIUpdateService.idl
+++ b/toolkit/mozapps/update/nsIUpdateService.idl
@@ -39,6 +39,17 @@ interface nsIUpdatePatch : nsISupports
*/
attribute AString finalURL;
+ /**
+ * The hash function to use when determining this file's integrity
+ */
+ attribute AString hashFunction;
+
+ /**
+ * The value of the hash function named above that should be computed if
+ * this file is not corrupt.
+ */
+ attribute AString hashValue;
+
/**
* The size of this file, in bytes.
*/
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