-# get the full fingerprint of new certifier key
-log debug "getting fingerprint of certifier key..."
-fingerprint=$(gpg_sphere "--list-key --with-colons --with-fingerprint 0x${keyID}!" \
- | grep '^fpr:' | grep "$keyID" | cut -d: -f10)
-
-if [ -z "$fingerprint" ] ; then
- failure "Key '$keyID' not found."
-fi
-
-log info "key found:"
-gpg_sphere "--fingerprint 0x${fingerprint}!"
+ # get the full fingerprint of new certifier key
+ log debug "getting fingerprint of certifier key..."
+ fingerprint=$(gpg_sphere "--list-key --with-colons --with-fingerprint 0x${keyID}!" \
+ | grep '^fpr:' | cut -d: -f10)
+
+ # test that there is only a single fingerprint
+ if (( $(echo "$fingerprint" | wc -l) != 1 )) ; then
+ cat <<EOF
+More than one fingerprint found:
+$fingerprint
+Please use a more specific key ID.
+EOF
+ failure
+ fi