Encrypt/decrypt IP

dfactoryplugins · Mar 12, 2021 · 7018d53 · 7018d53
1 parent 8d93885
commit 7018d53
Showing 1 changed file with 66 additions and 7 deletions.
diff --git a/includes/counter.php b/includes/counter.php
@@ -366,10 +366,6 @@ private function save_cookie( $id, $cookie = array(), $expired = true ) {
 	private function save_ip( $id ) {
 		$set_cookie = apply_filters( 'pvc_maybe_set_cookie', true );
 
-		// Cookie Notice compatibility
-		if ( function_exists( 'cn_cookies_accepted' ) && ! cn_cookies_accepted() )
-			$set_cookie = false;
-
 		if ( $set_cookie !== true )
 			return $id;
 
@@ -380,7 +376,7 @@ private function save_ip( $id ) {
 			$ip_cache = array();
 
 		// get user IP address
-		$user_ip = (string) $this->get_user_ip();
+		$user_ip = $this->get_user_ip();
 
 		// get current time
 		$current_time = current_time( 'timestamp', true );
@@ -709,6 +705,8 @@ public function ipv4_in_range( $ip, $range ) {
 	 * @return string
 	 */
 	public function get_user_ip() {
+		$ip = isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : '';
+
 		foreach ( array( 'HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_X_CLUSTER_CLIENT_IP', 'HTTP_FORWARDED_FOR', 'HTTP_FORWARDED', 'REMOTE_ADDR' ) as $key ) {
 			if ( array_key_exists( $key, $_SERVER ) === true ) {
 				foreach ( explode( ',', $_SERVER[$key] ) as $ip ) {
@@ -717,12 +715,12 @@ public function get_user_ip() {
 
 					// attempt to validate IP
 					if ( $this->validate_user_ip( $ip ) )
-						return $ip;
+						continue;
 				}
 			}
 		}
 
-		return isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : '';
+		return $ip;
 	}
 
 	/**
@@ -737,6 +735,67 @@ public function validate_user_ip( $ip ) {
 
 		return true;
 	}
+
+	/**
+	 * Encrypt user IP
+	 * 
+	 * @param int $ip
+	 * @return string $encrypted_ip
+	 */
+	public function encrypt_ip( $ip ) {
+		$auth_key = defined( 'AUTH_KEY' ) ? AUTH_KEY : '';
+		$auth_iv = defined( 'NONCE_KEY' ) ? NONCE_KEY : '';
+
+		// mcrypt strong encryption
+		if ( function_exists( 'mcrypt_encrypt' ) && defined( 'MCRYPT_BLOWFISH' ) ) {
+			// get max key size of the mcrypt mode
+			$max_key_size = mcrypt_get_key_size( MCRYPT_BLOWFISH, MCRYPT_MODE_CBC );
+			$max_iv_size = mcrypt_get_iv_size( MCRYPT_BLOWFISH, MCRYPT_MODE_CBC );
+
+			$encrypt_key = mb_strimwidth( $auth_key, 0, $max_key_size );
+			$encrypt_iv = mb_strimwidth( $auth_iv, 0, $max_iv_size );
+
+			$encrypted_ip = strtr( base64_encode( mcrypt_encrypt( MCRYPT_BLOWFISH, $encrypt_key, $ip, MCRYPT_MODE_CBC, $encrypt_iv ) ), '+/=', '-_,' );
+			// simple encryption
+		} elseif ( function_exists( 'gzdeflate' ) )
+			$encrypted_ip = base64_encode( convert_uuencode( gzdeflate( $ip ) ) );
+		// no encryption
+		else
+			$encrypted_ip = strtr( base64_encode( convert_uuencode( $ip ) ), '+/=', '-_,' );
+
+		return $encrypted_ip;
+	}
+
+	/**
+	 * Decrypt user IP
+	 * 
+	 * @param int $encrypted_ip
+	 * @return string $ip
+	 */
+	public function decrypt_ip( $encrypted_ip ) {
+		$auth_key = defined( 'AUTH_KEY' ) ? AUTH_KEY : '';
+		$auth_iv = defined( 'NONCE_KEY' ) ? NONCE_KEY : '';
+
+		// mcrypt strong encryption
+		if ( function_exists( 'mcrypt_decrypt' ) && defined( 'MCRYPT_BLOWFISH' ) ) {
+			// get max key size of the mcrypt mode
+			$max_key_size = mcrypt_get_key_size( MCRYPT_BLOWFISH, MCRYPT_MODE_CBC );
+			$max_iv_size = mcrypt_get_iv_size( MCRYPT_BLOWFISH, MCRYPT_MODE_CBC );
+
+			$encrypt_key = mb_strimwidth( $auth_key, 0, $max_key_size );
+			$encrypt_iv = mb_strimwidth( $auth_iv, 0, $max_iv_size );
+
+			$ip = mcrypt_decrypt( MCRYPT_BLOWFISH, $encrypt_key, base64_decode( strtr( $encrypted_ip, '-_,', '+/=' ) ), MCRYPT_MODE_CBC, $encrypt_iv );
+			// simple encryption
+		} elseif ( function_exists( 'gzinflate' ) ) {
+			$ip = gzinflate( convert_uudecode( base64_decode( $encrypted_ip ) ) );
+			// no encryption
+		} else {
+			$ip = convert_uudecode( base64_decode( strtr( $encrypted_ip, '-_,', '+/=' ) ) );
+		}
+
+		return $ip;
+	}
 
 	/**
 	 * Register REST API endpoints.