Adding a hex2curves util.

utils/hexstream2curves.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+hs="$1"
+len=${#hs}
+echo "# curves: $((len/4))"
+
+mapfile="etc/curves-mapping.txt"
+[ -s $mapfile ] || mapfile="../$mapfile"
+[ -s $mapfile ] || exit 255
+
+cur=""
+first=true
+
+for ((i=0; i<len ; i+=4)); do
+	printf "%02d" "$i"
+	echo -n ": ${hs:$i:4}"
+	grepstr="0x${hs:$i:2},0x${hs:$((i+2)):2}"
+        echo -n " --> $grepstr --> "
+        cur=$(grep -i -E "^ *${grepstr}" $mapfile | awk '{ print $3 }')
+	if [[ $grepstr == 0x00,0xff ]]; then
+		echo TPM_ECC_NONE
+	else
+		echo $cur
+	fi
+	if "$first"; then
+		curves="$cur"
+		first=false
+	else
+		curves="$curves:$cur"
+	fi
+done
+
+echo
+# remove leading : because of GREASE, and trailing because of TPM_ECC_NONE
+curves="${curves%:}"
+echo ${curves#:}