-# convert escaped characters from gpg output back into original
-# character
-# FIXME: undo all escape character translation in with-colons gpg output
-unescape() {
- echo "$1" | sed 's/\\x3a/:/'
+# hash of a file
+file_hash() {
+ md5sum "$1" 2> /dev/null
+}
+
+# convert escaped characters in pipeline from gpg output back into
+# original character
+# FIXME: undo all escape character translation in with-colons gpg
+# output
+gpg_unescape() {
+ sed 's/\\x3a/:/g'
+}
+
+# convert nasty chars into gpg-friendly form in pipeline
+# FIXME: escape everything, not just colons!
+gpg_escape() {
+ sed 's/:/\\x3a/g'
+}
+
+# prompt for GPG-formatted expiration, and emit result on stdout
+get_gpg_expiration() {
+ local keyExpire=
+
+ cat >&2 <<EOF
+Please specify how long the key should be valid.
+ 0 = key does not expire
+ <n> = key expires in n days
+ <n>w = key expires in n weeks
+ <n>m = key expires in n months
+ <n>y = key expires in n years
+EOF
+ while [ -z "$keyExpire" ] ; do
+ read -p "Key is valid for? (0) " keyExpire
+ if ! test_gpg_expire ${keyExpire:=0} ; then
+ echo "invalid value" >&2
+ unset keyExpire
+ fi
+ done
+ echo "$keyExpire"