MODUTIL

## Name

modutil — Manage PKCS #11 module information within the security module database.

## Synopsis

`modutil` [`options`] [[`arguments`]]

## STATUS

This documentation is still work in progress. Please contribute to the initial review in Mozilla NSS bug 836477

## Description

The Security Module Database Tool, modutil, is a command-line utility for managing PKCS #11 module information both within `secmod.db` files and within hardware tokens. modutil can add and delete PKCS #11 modules, change passwords on security databases, set defaults, list module contents, enable or disable slots, enable or disable FIPS 140-2 compliance, and assign default providers for cryptographic operations. This tool can also create certificate, key, and module security database files.

The tasks associated with security module database management are part of a process that typically also involves managing key databases and certificate databases.

## Options

Running modutil always requires one (and only one) option to specify the type of module operation. Each option may take arguments, anywhere from none to multiple arguments.

Options

-add modulename

  Add the named PKCS #11 module to the database. Use this option with the `-libfile`, `-ciphers`, and `-mechanisms` arguments.

-changepw tokenname

  Change the password on the named token. If the token has not been initialized, this option initializes the password. Use this option with the `-pwfile` and `-newpwfile` arguments. A password is equivalent to a personal identification number (PIN).

-chkfips

  Verify whether the module is in the given FIPS mode. true means to verify that the module is in FIPS mode, while false means to verify that the module is not in FIPS mode.

-create

  Create new certificate, key, and module databases. Use the `-dbdir` directory argument to specify a directory. If any of these databases already exist in a specified directory, modutil returns an error message.

-default modulename

  Specify the security mechanisms for which the named module will be a default provider. The security mechanisms are specified with the `-mechanisms` argument.

-delete modulename

  Delete the named module. The default NSS PKCS #11 module cannot be deleted.

-disable modulename

  Disable all slots on the named module. Use the `-slot` argument to disable a specific slot.

  The internal NSS PKCS #11 module cannot be disabled.

-enable modulename

  Enable all slots on the named module. Use the `-slot` argument to enable a specific slot.

-fips [true | false]

  Enable (true) or disable (false) FIPS 140-2 compliance for the default NSS module.

-force

  Disable modutil's interactive prompts so it can be run from a script. Use this option only after manually testing each planned operation to check for warnings and to ensure that bypassing the prompts will cause no security lapses or loss of database integrity.

-jar JAR-file

  Add a new PKCS #11 module to the database using the named JAR file. Use this command with the `-installdir` and `-tempdir` arguments. The JAR file uses the NSS PKCS #11 JAR format to identify all the files to be installed, the module's name, the mechanism flags, and the cipher flags, as well as any files to be installed on the target machine, including the PKCS #11 module library file and other files such as documentation. This is covered in the JAR installation file section in the man page, which details the special script needed to perform an installation through a server or with modutil.

-list [modulename]

  Display basic information about the contents of the `secmod.db` file. Specifying a modulename displays detailed information about a particular module and its slots and tokens.

-rawadd

  Add the module spec string to the `secmod.db` database.

-rawlist

  Display the module specs for a specified module or for all loadable modules.

-undefault modulename

  Specify the security mechanisms for which the named module will not be a default provider. The security mechanisms are specified with the `-mechanisms` argument.

Arguments

MODULE

  Give the security module to access.

MODULESPEC

  Give the security module spec to load into the security database.

-ciphers cipher-enable-list

  Enable specific ciphers in a module that is being added to the database. The cipher-enable-list is a colon-delimited list of cipher names. Enclose this list in quotation marks if it contains spaces.

-dbdir directory

  Specify the database directory in which to access or create security module database files.

  modutil supports two types of databases: the legacy security databases (`cert8.db`, `key3.db`, and `secmod.db`) and SQLite databases (`cert9.db`, `key4.db`, and `pkcs11.txt`). If the prefix dbm: is not used, then the tool assumes that the given databases are in SQLite format.

--dbprefix prefix

  Specify the prefix used on the database files, such as `my_` for `my_cert9.db`. This option is provided as a special case. Changing the names of the certificate and key databases is not recommended.

-installdir root-installation-directory

  Specify the root installation directory relative to which files will be installed by the `-jar` option. This directory should be one below which it is appropriate to store dynamic library files, such as a server's root directory.

-libfile library-file

  Specify a path to a library file containing the implementation of the PKCS #11 interface module that is being added to the database.

-mechanisms mechanism-list

  Specify the security mechanisms for which a particular module will be flagged as a default provider. The mechanism-list is a colon-delimited list of mechanism names. Enclose this list in quotation marks if it contains spaces.

  The module becomes a default provider for the listed mechanisms when those mechanisms are enabled. If more than one module claims to be a particular mechanism's default provider, that mechanism's default provider is undefined.

  modutil supports several mechanisms: RSA, DSA, RC2, RC4, RC5, AES, DES, DH, SHA1, SHA256, SHA512, SSL, TLS, MD5, MD2, RANDOM (for random number generation), and FRIENDLY (meaning certificates are publicly readable).

-newpwfile new-password-file

  Specify a text file containing a token's new or replacement password so that a password can be entered automatically with the `-changepw` option.

-nocertdb

  Do not open the certificate or key databases. This has several effects:

  - With the `-create` command, only a module security file is created; certificate and key databases are not created.

  - With the `-jar` command, signatures on the JAR file are not checked.

  - With the `-changepw` command, the password on the NSS internal module cannot be set or changed, since this password is stored in the key database.

-pwfile old-password-file

  Specify a text file containing a token's existing password so that a password can be entered automatically when the `-changepw` option is used to change passwords.

-secmod secmodname

  Give the name of the security module database (like `secmod.db`) to load.

-slot slotname

  Specify a particular slot to be enabled or disabled with the `-enable` or `-disable` options.

-string CONFIG_STRING

  Pass a configuration string for the module being added to the database.

-tempdir temporary-directory

  Give a directory location where temporary files are created during the installation by the `-jar` option. If no temporary directory is specified, the current directory is used.

## Usage and Examples

Creating Database Files

Before any operations can be performed, there must be a set of security databases available. modutil can be used to create these files. The only required argument is the database that where the databases will be located.

    modutil -create -dbdir directory

Adding a Cryptographic Module

Adding a PKCS #11 module means submitting a supporting library file, enabling its ciphers, and setting default provider status for various security mechanisms. This can be done by supplying all of the information through modutil directly or by running a JAR file and install script. For the most basic case, simply upload the library:

    modutil -add modulename -libfile library-file [-ciphers cipher-enable-list] [-mechanisms mechanism-list]

For example:

    modutil -dbdir /home/my/sharednssdb -add "Example PKCS #11 Module" -libfile "/tmp/crypto.so" -mechanisms RSA:DSA:RC2:RANDOM

    Using database directory ...
    Module "Example PKCS #11 Module" added to database.

Installing a Cryptographic Module from a JAR File

PKCS #11 modules can also be loaded using a JAR file, which contains all of the required libraries and an installation script that describes how to install the module. The JAR install script is described in more detail in the section called “JAR Installation File Format”.

The JAR installation script defines the setup information for each platform that the module can be installed on. For example:

    Platforms {
       Linux:5.4.08:x86 {
          ModuleName { "Example PKCS #11 Module" }
          ModuleFile { crypto.so }
          DefaultMechanismFlags{0x0000}
          CipherEnableFlags{0x0000}
          Files {
             crypto.so {
                Path{ /tmp/crypto.so }
             }
             setup.sh {
                Executable
                Path{ /tmp/setup.sh }
             }
          }
       }
       Linux:6.0.0:x86 {
          EquivalentPlatform { Linux:5.4.08:x86 }
       }
    }

Both the install script and the required libraries must be bundled in a JAR file, which is specified with the `-jar` argument.

    modutil -dbdir /home/mt"jar-install-filey/sharednssdb -jar install.jar -installdir /home/my/sharednssdb

    This installation JAR file was signed by:
    ----------------------------------------------

    **SUBJECT NAME**

    C=US, ST=California, L=Mountain View, CN=Cryptorific Inc., OU=Digital ID
    Class 3 - Netscape Object Signing, OU="www.verisign.com/repository/CPS
    Incorp. by Ref.,LIAB.LTD(c)9 6", OU=www.verisign.com/CPS Incorp.by Ref
    . LIABILITY LTD.(c)97 VeriSign, OU=VeriSign Object Signing CA - Class 3
    Organization, OU="VeriSign, Inc.", O=VeriSign Trust Network **ISSUER
    NAME**, OU=www.verisign.com/CPS Incorp.by Ref. LIABILITY LTD.(c)97
    VeriSign, OU=VeriSign Object Signing CA - Class 3 Organization,
    OU="VeriSign, Inc.", O=VeriSign Trust Network
    ----------------------------------------------

    Do you wish to continue this installation? (y/n) y
    Using installer script "installer_script"
    Successfully parsed installation script
    Current platform is Linux:5.4.08:x86
    Using installation parameters for platform Linux:5.4.08:x86
    Installed file crypto.so to /tmp/crypto.so
    Installed file setup.sh to ./pk11inst.dir/setup.sh
    Executing "./pk11inst.dir/setup.sh"...
    "./pk11inst.dir/setup.sh" executed successfully
    Installed module "Example PKCS #11 Module" into module database

    Installation completed successfully

Adding Module Spec

Each module has information stored in the security database about its configuration and parameters. These can be added or edited using the `-rawadd` command. For the current settings or to see the format of the module spec in the database, use the `-rawlist` option.

    modutil -rawadd modulespec

Deleting a Module

A specific PKCS #11 module can be deleted from the `secmod.db` database:

    modutil -delete modulename -dbdir directory

Displaying Module Information

The `secmod.db` database contains information about the PKCS #11 modules that are available to an application or server to use. The list of all modules, information about specific modules, and database configuration specs for modules can all be viewed.

To simply get a list of modules in the database, use the `-list` command.

    modutil -list [modulename] -dbdir directory

Listing the modules shows the module name, their status, and other associated security databases for certificates and keys. For example:

    modutil -list -dbdir /home/my/sharednssdb

    Listing of PKCS #11 Modules
    -----------------------------------------------------------
      1. NSS Internal PKCS #11 Module
             slots: 2 slots attached
            status: loaded

             slot: NSS Internal Cryptographic Services
            token: NSS Generic Crypto Services
    	  uri: pkcs11:token=NSS%20Generic%20Crypto%20Services;manufacturer=Mozilla%20Foundation;serial=0000000000000000;model=NSS%203

             slot: NSS User Private Key and Certificate Services
            token: NSS Certificate DB
    	  uri: pkcs11:token=NSS%20Certificate%20DB;manufacturer=Mozilla%20Foundation;serial=0000000000000000;model=NSS%203
    -----------------------------------------------------------

Passing a specific module name with the `-list` returns details information about the module itself, like supported cipher mechanisms, version numbers, serial numbers, and other information about the module and the token it is loaded on. For example:

     modutil -list "NSS Internal PKCS #11 Module" -dbdir /home/my/sharednssdb

    -----------------------------------------------------------
    Name: NSS Internal PKCS #11 Module
    Library file: **Internal ONLY module**
    Manufacturer: Mozilla Foundation
    Description: NSS Internal Crypto Services
    PKCS #11 Version 2.20
    Library Version: 3.11
    Cipher Enable Flags: None
    Default Mechanism Flags: RSA:RC2:RC4:DES:DH:SHA1:MD5:MD2:SSL:TLS:AES

      Slot: NSS Internal Cryptographic Services
      Slot Mechanism Flags: RSA:RC2:RC4:DES:DH:SHA1:MD5:MD2:SSL:TLS:AES
      Manufacturer: Mozilla Foundation
      Type: Software
      Version Number: 3.11
      Firmware Version: 0.0
      Status: Enabled
      Token Name: NSS Generic Crypto Services
      Token Manufacturer: Mozilla Foundation
      Token Model: NSS 3
      Token Serial Number: 0000000000000000
      Token Version: 4.0
      Token Firmware Version: 0.0
      Access: Write Protected
      Login Type: Public (no login required)
      User Pin: NOT Initialized

      Slot: NSS User Private Key and Certificate Services
      Slot Mechanism Flags: None
      Manufacturer: Mozilla Foundation
      Type: Software
      Version Number: 3.11
      Firmware Version: 0.0
      Status: Enabled
      Token Name: NSS Certificate DB
      Token Manufacturer: Mozilla Foundation
      Token Model: NSS 3
      Token Serial Number: 0000000000000000
      Token Version: 8.3
      Token Firmware Version: 0.0
      Access: NOT Write Protected
      Login Type: Login required
      User Pin: Initialized

A related command, `-rawlist` returns information about the database configuration for the modules. (This information can be edited by loading new specs using the `-rawadd` command.)

     modutil -rawlist -dbdir /home/my/sharednssdb
     name="NSS Internal PKCS #11 Module" parameters="configdir=. certPrefix= keyPrefix= secmod=secmod.db flags=readOnly " NSS="trustOrder=75 cipherOrder=100 slotParams={0x00000001=[slotFlags=RSA,RC4,RC2,DES,DH,SHA1,MD5,MD2,SSL,TLS,AES,RANDOM askpw=any timeout=30 ] }  Flags=internal,critical"

Setting a Default Provider for Security Mechanisms

Multiple security modules may provide support for the same security mechanisms. It is possible to set a specific security module as the default provider for a specific security mechanism (or, conversely, to prohibit a provider from supplying those mechanisms).

    modutil -default modulename -mechanisms mechanism-list

To set a module as the default provider for mechanisms, use the `-default` command with a colon-separated list of mechanisms. The available mechanisms depend on the module; NSS supplies almost all common mechanisms. For example:

    modutil -default "NSS Internal PKCS #11 Module" -dbdir -mechanisms RSA:DSA:RC2

    Using database directory c:\databases...

    Successfully changed defaults.

Clearing the default provider has the same format:

    modutil -undefault "NSS Internal PKCS #11 Module" -dbdir -mechanisms MD2:MD5

Enabling and Disabling Modules and Slots

Modules, and specific slots on modules, can be selectively enabled or disabled using modutil. Both commands have the same format:

    modutil -enable|-disable modulename [-slot slotname]

For example:

    modutil -enable "NSS Internal PKCS #11 Module" -slot "NSS Internal Cryptographic Services                            " -dbdir .

    Slot "NSS Internal Cryptographic Services                            " enabled.

Be sure that the appropriate amount of trailing whitespace is after the slot name. Some slot names have a significant amount of whitespace that must be included, or the operation will fail.

Enabling and Verifying FIPS Compliance

The NSS modules can have FIPS 140-2 compliance enabled or disabled using modutil with the `-fips` option. For example:

    modutil -fips true -dbdir /home/my/sharednssdb/

    FIPS mode enabled.

To verify that status of FIPS mode, run the `-chkfips` command with either a true or false flag (it doesn't matter which). The tool returns the current FIPS setting.

    modutil -chkfips false -dbdir /home/my/sharednssdb/

    FIPS mode enabled.

Changing the Password on a Token

Initializing or changing a token's password:

    modutil -changepw tokenname [-pwfile old-password-file] [-newpwfile new-password-file]

    modutil -dbdir /home/my/sharednssdb -changepw "NSS Certificate DB"

    Enter old password:
    Incorrect password, try again...
    Enter old password:
    Enter new password:
    Re-enter new password:
    Token "Communicator Certificate DB" password changed successfully.

## JAR Installation File Format

When a JAR file is run by a server, by modutil, or by any program that does not interpret JavaScript, a special information file must be included to install the libraries. There are several things to keep in mind with this file:

- It must be declared in the JAR archive's manifest file.

- The script can have any name.

- The metainfo tag for this is Pkcs11_install_script. To declare meta-information in the manifest file, put it in a file that is passed to signtool.

Sample Script

For example, the PKCS #11 installer script could be in the file pk11install. If so, the metainfo file for signtool includes a line such as this:

    + Pkcs11_install_script: pk11install

The script must define the platform and version number, the module name and file, and any optional information like supported ciphers and mechanisms. Multiple platforms can be defined in a single install file.

    ForwardCompatible { IRIX:6.2:mips SUNOS:5.5.1:sparc }
    Platforms {
       WINNT::x86 {
          ModuleName { "Example Module" }
          ModuleFile { win32/fort32.dll }
          DefaultMechanismFlags{0x0001}
          DefaultCipherFlags{0x0001}
          Files {
             win32/setup.exe {
                Executable
                RelativePath { %temp%/setup.exe }
             }
             win32/setup.hlp {
                RelativePath { %temp%/setup.hlp }
             }
             win32/setup.cab {
                RelativePath { %temp%/setup.cab }
             }
          }
       }
       SUNOS:5.5.1:sparc {
          ModuleName { "Example UNIX Module" }
          ModuleFile { unix/fort.so }
          DefaultMechanismFlags{0x0001}
          CipherEnableFlags{0x0001}
          Files {
             unix/fort.so {
                RelativePath{%root%/lib/fort.so}
                AbsolutePath{/usr/local/netscape/lib/fort.so}
                FilePermissions{555}
             }
             xplat/instr.html {
                RelativePath{%root%/docs/inst.html}
                AbsolutePath{/usr/local/netscape/docs/inst.html}
                FilePermissions{555}
             }
          }
       }
       IRIX:6.2:mips {
          EquivalentPlatform { SUNOS:5.5.1:sparc }
       }
    }

Script Grammar

The script is basic Java, allowing lists, key-value pairs, strings, and combinations of all of them.

    --> valuelist

    valuelist --> value valuelist
                   <null>

    value ---> key_value_pair
                string

    key_value_pair --> key { valuelist }

    key --> string

    string --> simple_string
                "complex_string"

    simple_string --> [^ \t\n\""{""}"]+

    complex_string --> ([^\"\\\r\n]|(\\\")|(\\\\))+

Quotes and backslashes must be escaped with a backslash. A complex string must not include newlines or carriage returns.Outside of complex strings, all white space (for example, spaces, tabs, and carriage returns) is considered equal and is used only to delimit tokens.

Keys

The Java install file uses keys to define the platform and module information.

ForwardCompatible gives a list of platforms that are forward compatible. If the current platform cannot be found in the list of supported platforms, then the ForwardCompatible list is checked for any platforms that have the same OS and architecture in an earlier version. If one is found, its attributes are used for the current platform.

Platforms (required) Gives a list of platforms. Each entry in the list is itself a key-value pair: the key is the name of the platform and the value list contains various attributes of the platform. The platform string is in the format system name:OS release:architecture. The installer obtains these values from NSPR. OS release is an empty string on non-Unix operating systems. NSPR supports these platforms:

- AIX (rs6000)

- BSDI (x86)

- FREEBSD (x86)

- HPUX (hppa1.1)

- IRIX (mips)

- LINUX (ppc, alpha, x86)

- MacOS (PowerPC)

- NCR (x86)

- NEC (mips)

- OS2 (x86)

- OSF (alpha)

- ReliantUNIX (mips)

- SCO (x86)

- SOLARIS (sparc)

- SONY (mips)

- SUNOS (sparc)

- UnixWare (x86)

- WIN16 (x86)

- WINNT (x86)

For example:

    IRIX:6.2:mips
    SUNOS:5.5.1:sparc
    Linux:2.0.32:x86

The module information is defined independently for each platform in the ModuleName, ModuleFile, and Files attributes. These attributes must be given unless an EquivalentPlatform attribute is specified.

Per-Platform Keys

Per-platform keys have meaning only within the value list of an entry in the Platforms list.

ModuleName (required) gives the common name for the module. This name is used to reference the module by servers and by the modutil tool.

ModuleFile (required) names the PKCS #11 module file for this platform. The name is given as the relative path of the file within the JAR archive.

Files (required) lists the files that need to be installed for this module. Each entry in the file list is a key-value pair. The key is the path of the file in the JAR archive, and the value list contains attributes of the file. At least RelativePath or AbsolutePath must be specified for each file.

DefaultMechanismFlags specifies mechanisms for which this module is the default provider; this is equivalent to the `-mechanism` option with the `-add` command. This key-value pair is a bitstring specified in hexadecimal (0x) format. It is constructed as a bitwise OR. If the DefaultMechanismFlags entry is omitted, the value defaults to 0x0.

    RSA:                   0x00000001
    DSA:                   0x00000002
    RC2:                   0x00000004
    RC4:                   0x00000008
    DES:                   0x00000010
    DH:                    0x00000020
    FORTEZZA:              0x00000040
    RC5:                   0x00000080
    SHA1:                  0x00000100
    MD5:                   0x00000200
    MD2:                   0x00000400
    RANDOM:                0x08000000
    FRIENDLY:              0x10000000
    OWN_PW_DEFAULTS:       0x20000000
    DISABLE:               0x40000000

CipherEnableFlags specifies ciphers that this module provides that NSS does not provide (so that the module enables those ciphers for NSS). This is equivalent to the `-cipher` argument with the `-add` command. This key is a bitstring specified in hexadecimal (0x) format. It is constructed as a bitwise OR. If the CipherEnableFlags entry is omitted, the value defaults to 0x0.

EquivalentPlatform specifies that the attributes of the named platform should also be used for the current platform. This makes it easier when more than one platform uses the same settings.

Per-File Keys

Some keys have meaning only within the value list of an entry in a Files list.

Each file requires a path key the identifies where the file is. Either RelativePath or AbsolutePath must be specified. If both are specified, the relative path is tried first, and the absolute path is used only if no relative root directory is provided by the installer program.

RelativePath specifies the destination directory of the file, relative to some directory decided at install time. Two variables can be used in the relative path: %root% and %temp%. %root% is replaced at run time with the directory relative to which files should be installed; for example, it may be the server's root directory. The %temp% directory is created at the beginning of the installation and destroyed at the end. The purpose of %temp% is to hold executable files (such as setup programs) or files that are used by these programs. Files destined for the temporary directory are guaranteed to be in place before any executable file is run; they are not deleted until all executable files have finished.

AbsolutePath specifies the destination directory of the file as an absolute path.

Executable specifies that the file is to be executed during the course of the installation. Typically, this string is used for a setup program provided by a module vendor, such as a self-extracting setup executable. More than one file can be specified as executable, in which case the files are run in the order in which they are specified in the script file.

FilePermissions sets permissions on any referenced files in a string of octal digits, according to the standard Unix format. This string is a bitwise OR.

    user read:                0400
    user write:               0200
    user execute:             0100
    group read:               0040
    group write:              0020
    group execute:            0010
    other read:               0004
    other write:              0002
    other execute:            0001

Some platforms may not understand these permissions. They are applied only insofar as they make sense for the current platform. If this attribute is omitted, a default of 777 is assumed.

## NSS Database Types

NSS originally used BerkeleyDB databases to store security information. The last versions of these legacy databases are:

- cert8.db for certificates

- key3.db for keys

- secmod.db for PKCS #11 module information

BerkeleyDB has performance limitations, though, which prevent it from being easily used by multiple applications simultaneously. NSS has some flexibility that allows applications to use their own, independent database engine while keeping a shared database and working around the access issues. Still, NSS requires more flexibility to provide a truly shared security database.

In 2009, NSS introduced a new set of databases that are SQLite databases rather than BerkleyDB. These new databases provide more accessibility and performance:

- cert9.db for certificates

- key4.db for keys

- pkcs11.txt, which is listing of all of the PKCS #11 modules contained in a new subdirectory in the security databases directory

Because the SQLite databases are designed to be shared, these are the shared database type. The shared database type is preferred; the legacy format is included for backward compatibility.

By default, the tools (certutil, pk12util, modutil) assume that the given security databases use the SQLite type. Using the legacy databases must be manually specified by using the dbm: prefix with the given security directory. For example:

    modutil -create -dbdir dbm:/home/my/sharednssdb

To set the legacy database type as the default type for the tools, set the `NSS_DEFAULT_DB_TYPE` environment variable to `dbm`:

    export NSS_DEFAULT_DB_TYPE="dbm"

This line can be added to the `~/.bashrc` file to make the change permanent for the user.

- https://wiki.mozilla.org/NSS_Shared_DB_Howto

For an engineering draft on the changes in the shared NSS databases, see the NSS project wiki:

- https://wiki.mozilla.org/NSS_Shared_DB

## See Also

certutil (1)

pk12util (1)

signtool (1)

The NSS wiki has information on the new database design and how to configure applications to use it.

- https://wiki.mozilla.org/NSS_Shared_DB_Howto

- https://wiki.mozilla.org/NSS_Shared_DB

## Additional Resources

For information about NSS and other tools related to NSS (like JSS), check out the NSS project wiki at http://www.mozilla.org/projects/security/pki/nss/. The NSS site relates directly to NSS code changes and releases.

Mailing lists: https://lists.mozilla.org/listinfo/dev-tech-crypto

IRC: Freenode at #dogtag-pki

## Authors

The NSS tools were written and maintained by developers with Netscape, Red Hat, Sun, Oracle, Mozilla, and Google.

Authors: Elio Maldonado <emaldona@redhat.com>, Deon Lackey <dlackey@redhat.com>.

## LICENSE

Licensed under the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.