commit d497681c6edd490730c88892adf3523c81331f53 Author: Kathy Brade brade@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 cd8ca2659626..84516f0d4c66 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 1dc86a073646..ead961ab5252 100644 --- a/toolkit/mozapps/update/UpdateService.jsm +++ b/toolkit/mozapps/update/UpdateService.jsm @@ -742,6 +742,20 @@ 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. @@ -1534,6 +1548,8 @@ function UpdatePatch(patch) { } break; case "finalURL": + case "hashFunction": + case "hashValue": case "state": case "type": case "URL": @@ -1553,6 +1569,8 @@ UpdatePatch.prototype = { // over writing nsIUpdatePatch attributes. _attrNames: [ "errorCode", + "hashFunction", + "hashValue", "finalURL", "selected", "size", @@ -1566,6 +1584,8 @@ 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); @@ -4315,7 +4335,42 @@ 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; },

/** @@ -4889,6 +4944,9 @@ 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 @@ -4907,6 +4965,9 @@ 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 6f560b07cfe7..b6c71b2ef8d6 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 5e4cc63c3547..47bb27b17d41 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. */