[tbb-commits] [tor-browser/tor-browser-84.0-10.5-1] Bug 19121: reinstate the update.xml hash check
sysrqb at torproject.org
sysrqb at torproject.org
Wed Dec 9 17:49:53 UTC 2020
commit fb032d8869f76e3f73a5a103b956e27f2c61b6c7
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 f94c47cc8953..e42c8ed8d0b9 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 9f5e88efc5e6..6756fad9ce05 100644
--- a/toolkit/mozapps/update/UpdateService.jsm
+++ b/toolkit/mozapps/update/UpdateService.jsm
@@ -799,6 +799,20 @@ 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.
@@ -1612,6 +1626,8 @@ function UpdatePatch(patch) {
}
break;
case "finalURL":
+ case "hashFunction":
+ case "hashValue":
case "state":
case "type":
case "URL":
@@ -1631,6 +1647,8 @@ UpdatePatch.prototype = {
// over writing nsIUpdatePatch attributes.
_attrNames: [
"errorCode",
+ "hashFunction",
+ "hashValue",
"finalURL",
"selected",
"size",
@@ -1644,6 +1662,8 @@ 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);
@@ -4480,7 +4500,42 @@ 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;
},
/**
@@ -5072,6 +5127,9 @@ 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
@@ -5090,6 +5148,9 @@ 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 c2018042f164..20c166849a5a 100644
--- a/toolkit/mozapps/update/UpdateTelemetry.jsm
+++ b/toolkit/mozapps/update/UpdateTelemetry.jsm
@@ -180,6 +180,7 @@ 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 baf423622100..be19bfc989d5 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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