https://help.dreamhost.com/hc/en-us/articles/360001435926-Installing-OpenSSL-locally-under-your-username asdf-vm/asdf-ruby#258 (comment)
wget https://www.openssl.org/source/openssl-1.1.1q.tar.gz
tar xvfz openssl-1.1.1q.tar.gz -C ~/src/vendor/openssl
cd ~/src/vendor/openssl/openssl-1.1.1q
./config --prefix=/home/steve/openssl-1.1.1q --openssldir=/home/steve/openssl-1.1.1q no-ssl2
make
make test
make install
RUBY_CONFIGURE_OPTS="--with-openssl-dir=/home/steve/openssl-1.1.1q" asdf install ruby 2.7.6