Create cip0020-democode-BASH.sh

CIP-0020/codesamples/cip0020-democode-BASH.sh

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+#!/bin/bash
+
+# --------------------------------------------------------------------------------------------
+# Demonstration implementation of CIP-0020 Transaction Messages Encryption/Decryption via BASH
+# --------------------------------------------------------------------------------------------
+
+
+#Unencrypted Metadata JSON
+echo "Normal unencrpted messages metadata JSON:"
+cat normal-message-metadata.json | jq
+echo
+
+
+#Encrypt the msg array from the JSON
+encrText=$(jq -crM .\"674\".msg normal-message-metadata.json | openssl enc -e -aes-256-cbc -pbkdf2 -iter 10000 -a -k "cardano")
+echo "Encrypted Strings (base64 format):"
+echo "${encrText}"
+echo
+
+
+#Compose it into a new JSON and add the 'enc' entry
+echo "New encrypted messages metadata JSON:"
+jq ".\"674\".msg = [ $(awk {'print "\""$1"\","'} <<< ${encrText} | sed '$ s/.$//') ]" <<< '{"674":{"enc":"basic"}}' | jq
+
+
+echo
+echo "----------------------"
+echo
+
+
+#Encrypted Metadata JSON
+echo "Encrypted messages metadata JSON:"
+cat encrypted-message-metadata.json | jq
+echo
+
+
+#Decrypt the msg array from the JSON
+decrText=$(jq -crM ".\"674\".msg[]" encrypted-message-metadata.json | openssl enc -d -aes-256-cbc -pbkdf2 -iter 10000 -a -k "cardano")
+echo "Decrypted Content:"
+echo "${decrText}"
+echo
+
+
+#Compose it into a new JSON in the standard message format
+echo "New messages metadata JSON:"
+jq ".\"674\".msg = ${decrText}" <<< "{}"
+echo