Can Firefox Use Windows Certificate Store Path' title='Can Firefox Use Windows Certificate Store Path' />Mozilla Security Blog. AES GCM is a NIST standardised authenticated encryption algorithm FIPS 8. D. Since its standardisation in 2. TLS. With 8. 8 it is by far the most widely used TLS cipher in Firefox. Firefox telemetry on symmetric ciphers in TLSUnfortunately the AES GCM implementation used in Firefox provided by NSS until now did not take advantage of full hardware acceleration on all platforms it used a slower software only implementation on Mac, Linux 3. AVX, PCLMUL, and AES NI hardware instructions. Based on hardware telemetry information, only 3. Using the Help menu Firefox 3. You can open your profile folder directly from the Firefox Help menu, as follows In the Firefox menu, click on. Signing Windows Programs with SignTool Option to Reissue for a Driver Signing Certificate. If you have just purchased a Microsoft Authenticode codesigning. If youve ever dealt with a certificate authority CA, you may know most of this. If this is your first foray into it, hold onto your butts. Windows certificate store is mostly stored in the registry as outlined here. However, while IE, Chrome, SafariiTunes, Outlook, etc. Windows certificate store. Firefox 5. 5 users get full hardware acceleration as well as the resulting resistance to side channel analysis. In this post I describe how I made AES GCM in NSS and thus Firefox 5. To evaluate  the actual impact on Firefox users, I tested the practical speed of our encryption by downloading a large file from a secure site using various hardware configurations  Downloading a file on a mid 2. Mac. Book Pro Retina with Firefox 5. CPU usage in ssl. Enabling and disabling Java from the Java Control Panel. Applies to Windows or Mac OS X 10. Starting in Java 7, the Java Control Panel. Update news for RoboForms Windows password management product. Check back often to get the most uptodate information on new and upcoming version releases. The easiest way is to import the certificate into a sample firefoxprofile and then copy the cert8. Mozillas Root Store Program has taken the position that trust is not automatically transferable between organizations. This is specifically stated in section 8 of. Im looking to configure the following Firefox settings through a script VBS or batch default home page default search engine disable auto update Is this possibleAESGCM, the routine that performs the decryption. On a Windows laptop with an AMD C 7. AES NI instruction Firefox CPU usage is 6. Pokemon Advanced Adventure Hack Cheats Angry. MBs. This doesnt seem to be only an academic issue Particularly for battery operated devices, the energy consumption difference would be noticeable. Improving GCM performance. Speeding up the GCM multiplication function is the first obvious step to improve AES GCM performance. A bug was opened on integration of the original AES GCM code to provide an alternative to the textbook implementation of gcmHash. Mult. This code is not only slow but has timing side channels as you can see in the following excerpt from the binary multiplication algorithm for ib 1 ib lt bused ib. Inner product  Digits of a. MPDIGITSa, aused, bi, MPDIGITSc ib. MPDIGITc, ib aused bi. We can improve on two fronts here. First NSS should use the PCLMUL hardware instruction to speed up the ghash multiplication if possible. Second if PCLMUL is not available, NSS should use a fast constant time implementation. Bug 8. 68. 94. 8 has several attempts of speeding up the software implementation without introducing timing side channels. Unfortunately the fastest code that was proposed uses table lookups and is therefore not constant time accessing memory locations in the same cache line still leaks timing information. Thanks to Thomas Pornin I re implemented the binary multiplication in a way that doesnt leak any timing information and is still faster than any other proposed C code see Bug 8. Check out Thomas excellent write up for details. If PCLMUL is available on the CPU, using it is the way to go. All modern compilers support intrinsics, which allow us to write inline assembly in C that runs on all platforms without having to write assembly code files. A hardware accelerated implementation of the ghash multiplication can be easily implemented with mmclmulepi. On Mac and Linux the new 3. PCLMUL or AVX is not available. Since Windows doesnt support 1. NSS falls back to the slower 3. Improving AES performance. To speed up AES, NSS requires hardware acceleration on Mac as well as on Linux 3. AVX or has it disabled. When NSS cant use the specialised AES code it falls back to a table based implementation that is again not constant time in addition to being slow. There are currently no plans of rewriting the existing fallback code. AES is impossible to implement efficiently in software without introducing side channels. Implementing AES with intrinsics on the other hand is a breeze. Schedule0. for i 1 i lt cx Nr i. Schedulei. m mmaesenclastsi. Schedulecx Nr. Key expansion is a little bit more involved for 1. Mac sees the biggest improvement here. Previously, only Windows and 6. Linux used AES NI, and now all desktop x. Looking at the numbers. To measure the performance gain of the new AES GCM code I encrypted a 4. MB file with a 1. AES GCM. Note that these numbers are supposed to show a trend and heavily depend on the used machine and system load at the time. Linux measurements are done on an Intel Core i. Windows measurements on a Surface Pro 2 with an Intel Core i. U, and Mac mid 2. Core i. 7 4. 98. HQ. For all following graphs lower is better. Linux 6. 4 AES GCM 1. Linux 3. 2 AES GCM 1. Performance of AES GCM 1. Linux machine without hardware support for the AES, PCLMUL, or AVX instructions is at least twice as fast now. If the AES and PCLMUL instructions are available, the new code only needs 3. The speed up for 3. Linux is more significant as it didnt previously have any hardware accelerated code. With full hardware acceleration the new code is more than 5 times faster than before. Even in the worst case when PCLMUL is not available the speedup is still more than 5. The story is similar on Windows, although NSS already had fast code for 3. Windows users. Windows 6. AES GCM 1. 28 encryption performance improvements. Windows 3. 2 AES GCM 1. Performance improvements on Mac 6. AES NI or PCLMUL is not available. Mac OSX AES GCM 1. The numbers in Firefox. NSS 3. 3. 2 Firefox 5. AES GCM code. It provides significantly reduced CPU usage for most TLS connections or higher download rates  meaning better energy efficiency, too. NSS 3. 3. 2 is more intelligent in detecting the CPUs capabilities and using hardware acceleration whenever possible. Assuming that all intrinsics and mathematical operations other than division are constant time on the CPU, the new code doesnt have any timing side channels. On the very basic laptop with the AMD C 7. MBs to 6. MBs, and this is a device that has no hardware acceleration support. To see the performance improvement we can look at the case where AVX is not available which is the case for about 23 of the Firefox population. Assuming that at least AES NI and PCLMUL is supported by the CPU we see the CPU usage drop from 1. AESDecrypt CPU usage with NSS 3. AVX hardware support. AESDecrypt CPU usage with NSS 3. AVX hardware support. The most immediate effect can be seen on Mac. AESDecrypt NSS 3. CPU while in NSS 3. AESDecrypt CPU usage with NSS 3. Mac OSXAESDecrypt CPU usage with NSS 3. Mac OSXThe most significant performance improvements are summarise din the following table depicting the time in seconds to decrypt a 5. MB file with AES GCM 1. Linux 3. 2 bit. Mac. No AVX support. NSS 3. Firefox 5. 52. 0. NSS 3. 3. 2 Firefox 5. These improvements to AES GCM in NSS make Firefox 5. Firefox, Root Certificates, and you The Land. Phil. If youve ever dealt with a certificate authority CA, you may know most of this. If this is your first foray into it, hold onto your butts. Many enterprises stand up and run their own certificate authorities to 1 maintain control over certificate issuance, 2 maintain the security of the certificate chain, and 3 not have to pay a public certificate authority to issue certs. Until recently, you could get certificates for private addresses 1. Now, they wont issue a certificate unless they can actually verify that the nameaddress space belongs to you. So, for many enterprises, the 3rd option above isnt viable for namespaces behind their firewalls. The easiest way to set up a CA, is to use Microsofts Certificate Authority role that is part of Windows Server. A handy thing to remember here is that the CA infrastructure is NOT tied to the domain infrastructure. So, even though it says its domain integrated, doesnt mean you cant issue certificates for spaces OUTSIDE of the named domain. Example I installed it in my. I want to issue a certificate for notmine. I can, and it wont be a problem. The domain integration is just an easy way to publish and distribute the important parts namely the root certificate and the certificate revocation lists CRLs. Once you have your CA set up and domain integrated and your root CA is published, youd be all set if the only browsers in your organization are Internet Explorer or Chrome. See, a web browser use a certificate store to keep all of the root certificates from all of the relevant public authorities. It also will store any certificates that you want. In the case of IE and Chrome, they use the OS integrated certificate store that is conveniently updated by Microsoft Update and Active Directory. In the case of Firefox and pretty much every other browser, the developers have decided NOT to trust the operating system store and has their own. This, of course, means that you cant rely on MS Update or Active Directory to update it with new root certificates. Doing searching online, and youll find a few references on how to overcome this problem with visualbasic scripts and the certutil. Firefox.   I suggest you go check that out. You will actually need to jump through the hoops to obtain the certutil. Firefox in order to use the script Ive included below. The visualbasic script is fairly basic and has a few caveats and bugs that arent readily apparent, so I re wrote the entire thing in Power. Shell for the new generation. I make no guarantees on its execution and with ALL code you download from the internet, its best to analyze and test it on your own prior to deployment. Import Certificates to Firefox. Name importcert. Author Phillip Cheetham. Date 0. 82. 62. For GPO, add script to User Configuration Policies Windows Settings Scripts Logon. Can configure as Powershell script, link to script path will only work on Windows 72. R2 or later. Can configure as regular script. Script Name powershell. Script Parameters noninteractive command lt script pathscript. Set variables from computer environment. Temp. Dir env TEMP. App. Data. Dir env APPDATA. Firefox. Profiles. Dir str. App. Data. Dir MozillaFirefoxProfiles. Set Domain specific variables for installation. Replace servername. Certutil. Folder servername. Replace Local CA with name of local certificate authority. Local. Certificate. Authority. Name Local CA. Replace certificate. If you need to deploy multiple certificate files, proceed to line 9. Str. Certificate. File. Name certificate. Set appropriate trust for the certificate authority by editing CT,c,C. Refer to https developer. USdocsMozillaProjectsNSSToolscertutil for more information. Trust. Attributes CT,c,C. Do not edit below this line. Is. Installed. ParameterMandatorytrue. Program. Name. if env PROCESSORARCHITECTURE eq AMD6. PROCESSORARCHITECTURE eq IA6. Get Item. Property HKLM SoftwareWow. NodeMicrosoftWindowsCurrent. VersionUninstall Where Object. Display. Name match Program. Name. true. Get Item. Property HKLM SOFTWAREMicrosoftWindowsCurrent. VersionUninstall Where Object. Display. Name match Program. Name. true. Is. InstalledFirefox. Test Path Path str. Temp. Dir Firefox. Tools eq true. Directory exists, ideally remove directory first to assure published filescerts are current. Remove Item Path str. Temp. Dir Firefox. Tools Force Recurse Error. Action Silently. Continue attempt to remove before overwriting. New Item Item. Type Directory str. Temp. Dir Firefox. Tools Force if delete fails, force directory overwrite. Copy Item str. Certutil. Folder str. Temp. Dir Firefox. Tools Force in any case, force file overwrite. Directory does not exist. New Item Item. Type Directory str. Temp. Dir Firefox. Tools Force. Copy Item str. Certutil. Folder str. Temp. Dir Firefox. Tools Force. exit terminate script execution if directory creation fails. Firefox. Profile. List Get Child. Item str. Firefox. Profiles. Dir. foreach profile in arr. Firefox. Profile. List. Backup certdb file. Copy Item profile. Dir cert. 8. db profile. Dir cert. 8. db. Force Error. Action Silently. Continue. Execute certificate insertion. Build command line, one section at a time because Invoke Expression will not process as single line. Cmd str. Temp. Dir Firefox. Toolscertutil. CAName str. Local. Certificate. Authority. Name needs to be encapsulated in single quotes. Root. File str. Temp. Dir Firefox. Tools str. Certificate. File. Name. exec. Attribs str. Trust. Attributes needs to be encapsulated in double quotes VERY IMPORTANT. Profile profile. Full. Name. exec. Cmd A n exec. CAName i exec. Root. File t exec. Attribs d exec. Profile. To include multiple certificate files, uncomment and copy the lines below as necessary. Local. Certificate. Authority. Name Local CA lt Update this line. CAName str. Local. Certificate. Authority. Name. Certificate. File. Name certificate. Update this line. Cmd A n exec. CAName i exec. Root. File t exec. Attribs d exec. Profile. Remove Item Path str. Temp. Dir Firefox. Tools Force Recurse Error. Action Silently. Continue remove temp directory.