Add script for dns api with Nearly Free Speech

dnsapi/dns_nfs.sh

@@ -0,0 +1,80 @@
+#!/usr/bin/env sh
+
+# Nearly Free Speech DNS API (https://www.nearlyfreespeech.net)
+# Author: Travis Neely (https://github.com/Travisivart)
+# Created: 2022-04-19
+
+# Expected environment variables as such:
+#
+#    export NFS_ACCOUNT="your_nearly_free_speech_account"
+#    export NFS_API_KEY="your_nearly_free_speech_api_key"
+#
+
+# Usage: dns_nfs_add _acme-challenge.domain.com "KjiayTfXPHmnHmOdevsOtJyzsU9AHw2T6R0lNVCl_oi"
+dns_nfs_add() {
+  FULLDOMAIN=$1
+  TXTVALUE=$2
+  ROOTDOMAIN=$(echo "$FULLDOMAIN" | awk -F '.' '{print $(NF-1)"."$NF}')
+  SUBDOMAIN=$(echo "$FULLDOMAIN" | sed 's/.'"$ROOTDOMAIN"'//g')
+
+  if [ "$SUBDOMAIN" = "$FULLDOMAIN" ]; then
+    unset SUBDOMAIN
+  fi
+  
+  _nfs_rest "/dns/$ROOTDOMAIN/addRR" "name=$SUBDOMAIN" 'type=TXT' "data=$2"
+}
+
+# Usage: dns_nfs_rm domain.com "KjiayTfXPHmnHmOdevsOtJyzsU9AHw2T6R0lNVCl_oi"
+dns_nfs_rm() {
+  FULLDOMAIN=$1
+  TXTVALUE=$2
+  ROOTDOMAIN=$(echo "$FULLDOMAIN" | awk -F '.' '{print $(NF-1)"."$NF}')
+  SUBDOMAIN=$(echo "$FULLDOMAIN" | sed 's/.'"$ROOTDOMAIN"'//g')
+
+  if [ "$SUBDOMAIN" = "$FULLDOMAIN" ]; then
+    unset SUBDOMAIN
+  fi
+
+  _nfs_rest "/dns/$ROOTDOMAIN/removeRR" "name=$SUBDOMAIN" 'type=TXT' "data=$2"
+}
+
+####################  Private functions below ##################################
+# Usage    add: _nfs_rest "/dns/domain.com/addRR" "name=" 'type=TXT' "data=KjiayTfXPHmnHmOdevsOtJyzsU9AHw2T6R0lNVCl_oi"
+#       remove: _nfs_rest "/dns/domain.com/removeRR" "name=www" 'type=TXT' "data=KjiayTfXPHmnHmOdevsOtJyzsU9AHw2T6R0lNVCl_oi"
+_nfs_rest () {
+
+    # Make sure NFS_ACCOUNT is set else exit
+    if [ -z "$NFS_ACCOUNT" ]; then
+      echo "NFS_ACCOUNT is not set, run 'export NFS_ACCOUNT=\"your_nearly_free_speech_account\" and rerun."
+      exit 1
+    fi
+
+    # Make sure NFS_API_KEY is set else exit
+    if [ -z "$NFS_API_KEY" ]; then
+      echo "NFS_API_KEY is not set, run 'export NFS_API_KEY=\"your_nearly_free_speech_api_key\" and rerun."
+      exit 1
+    fi
+
+    TIMESTAMP=$(date +%s)
+    SALT=$(tr -dc 'a-zA-Z0-9' < /dev/urandom | head -c 16)
+    REQUEST_URI="$1"
+
+    if [ "$#" -gt "1" ]; then
+        PARAMETERS="$2"
+    fi
+
+    COUNT=3
+    while test $COUNT -le $#
+    do
+        eval "PARAMETER=\$$COUNT"
+        PARAMETERS="$PARAMETERS&$PARAMETER"
+        COUNT=$((COUNT + 1))
+    done
+
+    BODY=$PARAMETERS
+    BODY_HASH=$(printf "%s" "$BODY" | sha1sum | awk '{print $1}')
+    HASH_STRING=$(printf "%s" "$NFS_ACCOUNT;$TIMESTAMP;$SALT;$NFS_API_KEY;$REQUEST_URI;$BODY_HASH")
+    HASH=$(printf "%s" "$HASH_STRING" | sha1sum | awk '{print $1}')
+
+    printf "%s" "$(curl -s -o - -k -X POST -H "X-NFSN-Authentication: $NFS_ACCOUNT;$TIMESTAMP;$SALT;$HASH" -d "$BODY" "https://api.nearlyfreespeech.net$REQUEST_URI")"
+}