Beyond Linux® From Scratch (System V Edition) - Version 12.2

Chapter 9. General Libraries

libssh2-1.11.0

Introduction to libssh2

Libssh2 package is a client-side C library implementing the SSH2 protocol.

This package is known to build and work properly using an LFS 12.2 platform.

Package Information

Additional Downloads

libssh2 Dependencies

Optional

CMake-3.30.2 (can be used instead of the configure script), libgcrypt-1.11.0 (can be used instead of OpenSSL), OpenSSH-9.8p1 (for some tests), and Docker (for some tests)

Installation of libssh2

First, fix a critical security vulnerability in libssh2: 

patch -Np1 -i ../libssh2-1.11.0-security_fixes-1.patch

If you want to test the package, exclude the tests requiring a static library, and remove the reference to an insecure algorithm removed since OpenSSH 9.8: 

sed -E '/^DOCKER_TEST/,/^SSHD_TEST/s/test_(auth_keyboard_info.* |hostkey |simple)/$(NOTHING)/' \
    -i tests/Makefile.inc &&
autoreconf -fi &&
sed 's/ssh-dss,//' -i tests/openssh_server/sshd_config

Install libssh2 by running the following commands: 

./configure --prefix=/usr          \
            --disable-docker-tests \
            --disable-static       &&
make

To test the results, issue: make check.

Now, as the root user: 

make install

Command Explanations

--disable-docker-tests: Disable the tests requiring Docker, which is beyond the scope of BLFS. Remove this switch if you've installed Docker and you wish to run the test suite.

--disable-static: This switch prevents installation of static versions of the libraries.

Contents

Installed Programs: None
Installed Library: libssh2.so
Installed Directories: None

Short Descriptions

libssh2.so

contains functions to use the SSH2 protocol