+
+# takes a gpg key or keys on stdin, and outputs a list of
+# fingerprints, one per line:
+list_primary_fingerprints() {
+ local file="$1"
+ local fake=$(msmktempdir)
+ GNUPGHOME="$fake" gpg --no-tty --quiet --import
+ GNUPGHOME="$fake" gpg --with-colons --fingerprint --list-keys | \
+ awk -F: '/^fpr:/{ print $10 }'
+ rm -rf "$fake"
+}