Create pow.sh

pow.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+for utils in argon2 xxd bc; do
+    if ! command -v $utils  &> /dev/null; then
+        echo "$utils is not installed. Please install it and try again." 
+        exit 1
+    fi
+done
+ 	
+if [ $# -lt 1 ]; then
+    read -p "Enter Challenge Code: " challenge
+else
+    challenge=$1
+fi 
+
+challenge=$(echo "$challenge" | xargs)
+
+IFS=':' read -r _ memory_cost time_cost salt difficulty <<< "$challenge" 
+
+memory_cost=$(echo "$memory_cost" | xargs)
+time_cost=$(echo "$time_cost" | xargs)
+difficulty=$(echo "$difficulty" | xargs)
+
+pw_prefix="UNBLOCK-$(head /dev/urandom | tr -dc A-Z0-9 | head -c 8)-"
+difficulty_raw=$(echo "scale=10; e(l(256) * (4 - l($difficulty) / l(256))) / 1" | bc -l | xargs printf %.0f)	
+
+echo "Estimated iterations: $difficulty"
+echo "Time Cost: $time_cost"
+echo
+ 
+n=1
+
+start_time=$(date +%s)
+
+elapsed_time() {
+    current_time=$(date +%s)
+    elapsed_time=$((current_time - start_time))
+    echo -ne "\rElapsed Time: $elapsed_time seconds."
+}
+
+while true; do
+    pw="$pw_prefix$n"
+    hash=$(echo -n "$pw" | argon2 "$salt" -t "$time_cost" -k "$memory_cost" -p 1  -id -v 13 -r)
+    hash_bytes=${hash:0:8}
+ 
+    if [ $((16#$hash_bytes)) -lt "$difficulty_raw" ]; then
+        echo
+        echo "SOLUTION FOUND"
+        echo "Your unblock code is: $pw"
+        echo "This is the code you enter into the site to pass the challenge."
+        echo
+        break
+    else
+        elapsed_time
+        n=$((n + 1)) 
+    fi
+done