OpenSSL not found on Windows

[kletterstein]

cargo build fails on my Windows 10 as openssl could not be found. However, it is installed in c:\Program Files\OpenSSL-Win64. The Distributor is http://slproweb.com/products/Win32OpenSSL.html. If only installations installed using vcpkg are supported, could you mention this in the docs?

Thanks and thanks for great crate!
Bernd

My system info is:

$HOST = x86_64-pc-windows-msvc
$TARGET = x86_64-pc-windows-msvc
openssl-sys = 0.9.67

The command output is:

λ cargo build
   Compiling openssl-sys v0.9.67
   Compiling atty v0.2.14
   Compiling clap v2.33.3
error: failed to run custom build command for `openssl-sys v0.9.67`

Caused by:
  process didn't exit successfully: `c:\Users\krietens\Projects\rust-openssl\target\debug\build\openssl-sys-9a902e1719db51b3\build-script-main` (exit code: 101)
  --- stdout
  cargo:rustc-cfg=const_fn
  cargo:rerun-if-env-changed=X86_64_PC_WINDOWS_MSVC_OPENSSL_LIB_DIR
  X86_64_PC_WINDOWS_MSVC_OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_LIB_DIR
  OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=X86_64_PC_WINDOWS_MSVC_OPENSSL_INCLUDE_DIR
  X86_64_PC_WINDOWS_MSVC_OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_INCLUDE_DIR
  OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=X86_64_PC_WINDOWS_MSVC_OPENSSL_DIR
  X86_64_PC_WINDOWS_MSVC_OPENSSL_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_DIR
  OPENSSL_DIR unset
  note: vcpkg did not find openssl: Could not look up details of packages in vcpkg tree could not read status file updates dir: Das System kann den angegebenen Pfad nicht finden. (os error 3)

  --- stderr
  thread 'main' panicked at '

  Could not find directory of OpenSSL installation, and this `-sys` crate cannot
  proceed without this knowledge. If OpenSSL is installed and this crate had
  trouble finding it,  you can set the `OPENSSL_DIR` environment variable for the
  compilation process.

  Make sure you also have the development packages of openssl installed.
  For example, `libssl-dev` on Ubuntu or `openssl-devel` on Fedora.

  If you're in a situation where you think the directory *should* be found
  automatically, please open a bug at https://github.com/sfackler/rust-openssl
  and include information about your system as well as this message.

  $HOST = x86_64-pc-windows-msvc
  $TARGET = x86_64-pc-windows-msvc
  openssl-sys = 0.9.67


  It looks like you're compiling for MSVC but we couldn't detect an OpenSSL
  installation. If there isn't one installed then you can try the rust-openssl
  README for more information about how to download precompiled binaries of
  OpenSSL:

  https://github.com/sfackler/rust-openssl#windows

  ', C:\Users\krietens\.cargo\registry\src\github.com-1ecc6299db9ec823\openssl-sys-0.9.67\build\find_normal.rs:174:5
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
error: build failed

Note: The URL in the output (https://github.com/sfackler/rust-openssl#windows) is not valid any more!

[sfackler]

https://docs.rs/openssl/0.10.36/openssl/#manual

[Kenttleton]

This has to do with the openssl-sys dependency. Looking at their docs was a little more helpful than rust-openssl docs. I had a lot of trouble with getting vcpkg working and cooperating.

What worked for me was using chocolatey to install openssl which installs to C:\Program Files\OpenSSL-Win64 by default. Following the openssl-sys docs knowing this I set some environment variables to match OPENSSL_DIR=C:\Program Files\OpenSSL-Win64 and created a folder called ca to hold the ca certificate from Mozilla that rust-openssl uses from here and set the environment variable to match SSL_CERT_FILE=C:\Program Files\OpenSSL-Win64\ca\cacert.pem.

After this I just had to do cargo build and it worked. VS Code also started highlighting properly again as this also broke that extension for me. Hope this helps.

[jonhoo]

For anyone who stumbles into this issue because their GitHub Actions CI starts failing on Windows when depending on openssl/openssl-sys with an error like

note: vcpkg did not find openssl: Could not find Vcpkg tree: No vcpkg installation found. Set the VCPKG_ROOT environment variable or run 'vcpkg integrate install'

I fixed this by taking a page out of this package's CI config along with a conditional on the runner context to give the following stanza at the top of my steps:

    steps:
      - run: echo "VCPKG_ROOT=$env:VCPKG_INSTALLATION_ROOT" | Out-File -FilePath $env:GITHUB_ENV -Append
        if: runner.os == 'Windows'
      - run: vcpkg install openssl:x64-windows-static-md
        if: runner.os == 'Windows'