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F* language

This is not the latest version of F* language available.

  • 1
  • 2
  • 3

2023.02.01 | Updated: 02 Feb 2023



Downloads of v 2023.02.01:


Software Author(s):

  • FStarLang

F* language 2023.02.01

This is not the latest version of F* language available.

  • 1
  • 2
  • 3

All Checks are Passing

3 Passing Tests

Validation Testing Passed

Verification Testing Passed


Scan Testing Successful:

No detections found in any package files

Learn More

Deployment Method: Individual Install, Upgrade, & Uninstall

To install F* language, run the following command from the command line or from PowerShell:


To upgrade F* language, run the following command from the command line or from PowerShell:


To uninstall F* language, run the following command from the command line or from PowerShell:


Deployment Method:


This applies to both open source and commercial editions of Chocolatey.

1. Enter Your Internal Repository Url

(this should look similar to https://community.chocolatey.org/api/v2/)

2. Setup Your Environment

1. Ensure you are set for organizational deployment

Please see the organizational deployment guide

2. Get the package into your environment

  • Open Source or Commercial:
    • Proxy Repository - Create a proxy nuget repository on Nexus, Artifactory Pro, or a proxy Chocolatey repository on ProGet. Point your upstream to https://community.chocolatey.org/api/v2/. Packages cache on first access automatically. Make sure your choco clients are using your proxy repository as a source and NOT the default community repository. See source command for more information.
    • You can also just download the package and push it to a repository Download

3. Copy Your Script

choco upgrade fstar -y --source="'INTERNAL REPO URL'" --version="'2023.02.01'" [other options]

See options you can pass to upgrade.

See best practices for scripting.

Add this to a PowerShell script or use a Batch script with tools and in places where you are calling directly to Chocolatey. If you are integrating, keep in mind enhanced exit codes.

If you do use a PowerShell script, use the following to ensure bad exit codes are shown as failures:

choco upgrade fstar -y --source="'INTERNAL REPO URL'" --version="'2023.02.01'" 

Write-Verbose "Exit code was $exitCode"
$validExitCodes = @(0, 1605, 1614, 1641, 3010)
if ($validExitCodes -contains $exitCode) {
  Exit 0

Exit $exitCode

- name: Install fstar
    name: fstar
    version: '2023.02.01'
    state: present

See docs at https://docs.ansible.com/ansible/latest/modules/win_chocolatey_module.html.

chocolatey_package 'fstar' do
  action    :install
  source   'INTERNAL REPO URL'
  version  '2023.02.01'

See docs at https://docs.chef.io/resource_chocolatey_package.html.

cChocoPackageInstaller fstar
    Name     = "fstar"
    Version  = "2023.02.01"
    Source   = "INTERNAL REPO URL"

Requires cChoco DSC Resource. See docs at https://github.com/chocolatey/cChoco.

package { 'fstar':
  ensure   => '2023.02.01',
  provider => 'chocolatey',
  source   => 'INTERNAL REPO URL',

Requires Puppet Chocolatey Provider module. See docs at https://forge.puppet.com/puppetlabs/chocolatey.

4. If applicable - Chocolatey configuration/installation

See infrastructure management matrix for Chocolatey configuration elements and examples.

Package Approved

This package was approved as a trusted package on 02 Feb 2023.


F* (pronounced F star) is a general-purpose functional programming language with effects aimed at program verification. It puts together the automation of an SMT-backed deductive verification tool with the expressive power of a proof assistant based on dependent types. After verification, F* programs can be extracted to efficient OCaml, F#, or C code. This enables verifying the functional correctness and security of realistic applications, such as a verified HTTPS stack.

F*'s type system includes dependent types, monadic effects, refinement types, and a weakest precondition calculus. Together, these features allow expressing precise and compact specifications for programs, including functional correctness and security properties. The F* type-checker aims to prove that programs meet their specifications using a combination of SMT solving and interactive proofs.

Apache License
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   Copyright 2008-2014 Nikhil Swamy and Microsoft Research

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at


   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   See the License for the specific language governing permissions and
   limitations under the License.
Verification is intended to assist the Chocolatey moderators and community
in verifying that this package's contents are trustworthy.

The embedded software have been downloaded from the listed download
location on <https://github.com/FStarLang/FStar/releases>
and can be verified by doing the following:

1. Download the following <https://github.com/FStarLang/FStar/releases/download/v2023.02.01/fstar_2023.02.01_Windows_x64.zip>
2. Get the checksum using one of the following methods:
  - Using powershell function 'Get-FileHash'
  - Use chocolatey utility 'checksum.exe'
3. The checksums should match the following:

  checksum type: sha256
  checksum: 8E2EE58BD7B50C83F79C5AF17C6B99C30DD97A2DA6ADA9D7DEDD001AEDC0C133

The file 'LICENSE.txt' has been obtained from <https://github.com/FStarLang/FStar/blob/9c8606bf95c84ef69ef7991db2ed4a3d4a5cc194/LICENSE>
$ErrorActionPreference = 'Stop'

$toolsPath = Split-Path -Parent $MyInvocation.MyCommand.Definition

$packageArgs = @{
  packageName = $env:ChocolateyPackageName
  file        = ''
  file64      = "$toolsPath\fstar_2023.02.01_Windows_x64.zip"
  destination = $toolsPath

Get-ChocolateyUnzip @packageArgs
Remove-Item $toolsPath\*.zip -ea 0

Get-ChildItem $toolsPath -Filter '*.exe' -Recurse | Where-Object { $_.Name -ne 'fstar.exe' } | ForEach-Object {
  New-Item -Path "$($_.FullName).ignore" -Value '' -Type File
} | Out-Null
md5: CB993A9D4ACEF6FE118558E983AA88D8 | sha1: ACCECB1EF53E9800056C76746FC24935847F9370 | sha256: 8E2EE58BD7B50C83F79C5AF17C6B99C30DD97A2DA6ADA9D7DEDD001AEDC0C133 | sha512: E33DE16748CB78B6C616E9B5D9567CAFB7C5BE600D6581A98CB27EC6DFB76F0C9F4C5E45CB82B831C25138DAB4BD92B26F716C3183232D67897A2D51760958F8

Log in or click on link to see number of positives.

In cases where actual malware is found, the packages are subject to removal. Software sometimes has false positives. Moderators do not necessarily validate the safety of the underlying software, only that a package retrieves software from the official distribution point and/or validate embedded software against official distribution point (where distribution rights allow redistribution).

Chocolatey Pro provides runtime protection from possible malware.

Add to Builder Version Downloads Last Updated Status
F* language 2023.9.3 70 Monday, September 4, 2023 Approved
F* language 2023.04.25 138 Tuesday, April 25, 2023 Approved
F* language 2023.04.08 63 Monday, April 10, 2023 Approved
F* language 2023.02.01 68 Thursday, February 2, 2023 Approved
F* language 2022.11.19 77 Saturday, November 19, 2022 Approved
F* language 2022.11.07 77 Tuesday, November 8, 2022 Approved
F* language 2022.10.07 62 Saturday, November 5, 2022 Approved
F* language 2022.08.10 90 Thursday, August 11, 2022 Approved
F* language 2022.07.13 75 Wednesday, July 13, 2022 Approved
F* language 2022.05.06 101 Saturday, May 7, 2022 Approved
F* language 2022.04.23 81 Sunday, April 24, 2022 Approved
F* language 2022.04.14 75 Sunday, April 17, 2022 Approved
F* language 2022.04.02 87 Sunday, April 3, 2022 Approved
F* language 2022.03.24 106 Sunday, March 27, 2022 Approved
F* language 2022.03.19 91 Sunday, March 20, 2022 Approved
F* language 2022.03.12 79 Sunday, March 13, 2022 Approved
F* language 2022.03.05 88 Sunday, March 6, 2022 Approved
F* language 2022.03.01 89 Tuesday, March 1, 2022 Approved
F* language 2022.02.12 90 Sunday, February 13, 2022 Approved
F* language 2022.02.05 95 Sunday, February 6, 2022 Approved
F* language 2022.01.29 74 Sunday, January 30, 2022 Approved
F* language 2022.01.22 95 Sunday, January 23, 2022 Approved
F* language 2022.01.15 85 Sunday, January 16, 2022 Approved
F* language 2022.01.08 84 Sunday, January 9, 2022 Approved
F* language 2022.01.01 78 Sunday, January 2, 2022 Approved
F* language 2021.12.25 76 Sunday, December 26, 2021 Approved
F* language 2021.12.18 80 Sunday, December 19, 2021 Approved
F* language 2021.12.11 73 Sunday, December 12, 2021 Approved
F* language 2021.12.10 74 Friday, December 10, 2021 Approved
F* language 2021.11.30 77 Sunday, December 5, 2021 Approved
F* language 2021.11.27 76 Thursday, December 2, 2021 Approved
F* language 2021.11.13 87 Sunday, November 14, 2021 Approved
F* language 2021.11.06 81 Sunday, November 7, 2021 Approved
F* language 2021.10.30 89 Sunday, October 31, 2021 Approved
F* language 2021.10.23 81 Sunday, October 24, 2021 Approved
F* language 2021.10.16 76 Sunday, October 17, 2021 Approved
F* language 2021.09.30 89 Sunday, October 3, 2021 Approved
F* language 2021.09.25 78 Sunday, September 26, 2021 Approved
F* language 2021.09.18 78 Sunday, September 19, 2021 Approved
F* language 2021.09.11 91 Sunday, September 12, 2021 Approved
F* language 2021.09.04 91 Sunday, September 5, 2021 Approved
F* language 2021.08.27 94 Monday, August 30, 2021 Approved
F* language 2021.07.31 110 Tuesday, August 17, 2021 Approved
F* language 273 Thursday, June 27, 2019 Exempted
F* language 601 Wednesday, October 17, 2018 Approved
F* language 209 Tuesday, August 28, 2018 Approved
F* language 488 Tuesday, September 5, 2017 Approved
F* language 462 Wednesday, May 3, 2017 Approved

This package has no dependencies.

Discussion for the F* language Package

Ground Rules:

  • This discussion is only about F* language and the F* language package. If you have feedback for Chocolatey, please contact the Google Group.
  • This discussion will carry over multiple versions. If you have a comment about a particular version, please note that in your comments.
  • The maintainers of this Chocolatey Package will be notified about new comments that are posted to this Disqus thread, however, it is NOT a guarantee that you will get a response. If you do not hear back from the maintainers after posting a message below, please follow up by using the link on the left side of this page or follow this link to contact maintainers. If you still hear nothing back, please follow the package triage process.
  • Tell us what you love about the package or F* language, or tell us what needs improvement.
  • Share your experiences with the package, or extra configuration or gotchas that you've found.
  • If you use a url, the comment will be flagged for moderation until you've been whitelisted. Disqus moderated comments are approved on a weekly schedule if not sooner. It could take between 1-5 days for your comment to show up.
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