The default password length and IPFS gateway can be overidden by sett…

…ing environment variables, IWPASSWORDLENGTH and IWIPFSGATEWAY, respectively.

README.md

@@ -38,6 +38,18 @@ gateway](https://cloudflare-ipfs.com), decrypt it and save it locally.
 
 `ipfs-wormhole.sh update`
 
+## Parameters
+
+The default password length and IPFS gateway can be overidden by setting the
+environment variables IWPASSWORDLENGTH and IWIPFSGATEWAY, respectively.
+
+E.g.:
+
+- `IWPASSWORDLENGTH=50 ipfs-wormhole.sh send FILE` will use a longer password to
+  encrypt FILE (default length is 40).
+- `IWIPFSGATEWAY=https://gateway.ipfs.io/ipfs ipfs-wormhole.sh receive tag` will
+  use the official IPFS gateway (instead of Cloudflare's gateway) if `ipfs daemon` is not running.
+
 # How it works
 
 Your data is encrypted on the sender's machine, using `gpg` and its default

ipfs-wormhole.sh

@@ -4,8 +4,12 @@ IFS=$'\n\t'
 
 # See <https://raw.githubusercontent.com/aurelg/ipfs-wormhole/master/README.md>
 
-PASSWORDLENGTH=40
-IPFSGATEWAY=https://cloudflare-ipfs.com/ipfs
+if [ -z "${IWPASSWORDLENGTH-}" ]; then
+  IWPASSWORDLENGTH=40
+fi
+if [ -z "${IWIPFSGATEWAY-}" ]; then
+  IWIPFSGATEWAY=https://cloudflare-ipfs.com/ipfs
+fi
 
 # Check deps
 
@@ -26,7 +30,7 @@ send)
   TARCMD="$(checkdep tar)"
   GPGCMD="$(checkdep gpg)"
   IPFSCMD="$(checkdep ipfs)"
-  PASSWORD=$($PWGENCMD -1 $PASSWORDLENGTH)
+  PASSWORD=$($PWGENCMD -1 $IWPASSWORDLENGTH)
   USERINPUT=${2:-}
   FILE=${USERINPUT%/}
   if ! pgrep ipfs 1>/dev/null 2>&1; then
@@ -83,7 +87,7 @@ receive)
   else
     echo "Receiving $DSTFILENAME over HTTPS..."
     WGETCMD="$(checkdep wget)"
-    $WGETCMD -qO - "$IPFSGATEWAY"/"$IPFSHASH" |
+    $WGETCMD -qO - "$IWIPFSGATEWAY"/"$IPFSHASH" |
       $GPGCMD --batch --passphrase="$PASSWORD" -d \
         >"$DSTFILENAME" \
         2>/dev/null