File build/certs-to-c artifact c49efbf6f1 part of check-in fa022cbc5d

#! /bin/bash

for file in "$@"; do
	rm -f tmpfile.x509
	if ! openssl x509 -in "${file}" -inform pem -noout -checkend 0 >/dev/null 2>/dev/null; then
		echo "warning: Skipping \"${file}\" as it is invalid or expired." >&2

		continue
	fi

	openssl x509 -in "${file}" -out tmpfile.x509 -inform pem -outform der

	pubkeylen="$(openssl x509 -in tmpfile.x509 -inform der -text -noout | grep 'RSA Public Key:' | sed 's@^.*(\([0-9][0-9]*\) bit).*$@\1@')"
	certlen="$(stat -c '%s' tmpfile.x509)"
	cert="$(( cat tmpfile.x509 | od -t x1 | cut -c 9- | tr "\n" ' '; echo ) | sed 's@ @@g;s@..@\\x&@g')"

	cat << _EOF_
	{
		{0},
		0,
		${certlen},
		(unsigned char *) "${cert}",
		${pubkeylen}
	},
_EOF_
done

rm -f tmpfile.x509