Trust store generator scripts for various Gemini clients
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#!/bin/sh
# Download and merge lists of Gemini hosts from:
# gemini://geminispace.info/known-hosts
# gemini://gemini.bortzmeyer.org/software/lupa/lupa-capsules.txt
set -o errexit # (-e) exit immediately if any command has a non-zero exit status
set -o nounset # (-u) don't accept undefined variables
#set -o xtrace # for debugging
# Go where this script is.
cd "$(dirname "$0")" || exit
# If Agunua is installed, use it.
if command -v agunua >/dev/null; then
# Using Agunua is more secure, because it does certificate pinning.
# The --insecure option just makes it accept certificates that are
# not signed by a (known) CA.
hosts1=$(agunua --insecure --binary gemini://geminispace.info/known-hosts 2>/dev/null \
| grep "gemini://" | cut -d ' ' -f 3)
hosts2=$(agunua --insecure --binary gemini://gemini.bortzmeyer.org/software/lupa/lupa-capsules.txt 2>/dev/null)
else
# If Agunua is not installed, pipe the request into OpenSSL s_client.
hosts1=$(printf "gemini://geminispace.info/known-hosts\r\n" \
| timeout 5 openssl s_client -quiet -connect "geminispace.info:1965" 2>/dev/null \
| grep "gemini://" | cut -d ' ' -f 3)
hosts2=$(printf "gemini://gemini.bortzmeyer.org/software/lupa/lupa-capsules.txt\r\n" \
| timeout 5 openssl s_client -quiet -connect "gemini.bortzmeyer.org:1965" 2>/dev/null \
| tail -n +2)
fi
# Concatenate the two files.
hosts="$hosts1
$hosts2"
# Convert punycode to unicode; sort entries; remove duplicates; remove empty lines.
hosts=$(echo "$hosts" | idn --allow-unassigned --idna-to-unicode | sort -fu | awk NF)
# Remove hosts which contain neither "." nor ":", such as "localhost".
hosts=$(echo "$hosts" | grep '\.\|:')
# Remove explicitly excluded hosts.
hosts=$(echo "$hosts" | grep -vxEf excluded-hosts)
if [ -z "$hosts" ]; then
>&2 echo "hosts file downloads failed."
exit 1
fi
# Save to file.
echo "$hosts" > hosts
echo OK