replace browserify-zlib with webpack v5 compatible pako (#287)

Author: taymoork2

lib/jwe/decrypt.js

@@ -9,7 +9,7 @@ var base64url = require("../util/base64url"),
     AlgConfig = require("../util/algconfig"),
     JWK = require("../jwk"),
     merge = require("../util/merge"),
-    zlib = require("zlib");
+    pako = require("pako");
 
 var DEFAULT_OPTIONS = {
   algorithms: "*"
@@ -285,17 +285,17 @@ function JWEDecrypter(ks, globalOpts) {
       promise = promise.then(function(jwe) {
         if ("DEF" === jwe.header.zip) {
           return new Promise(function(resolve, reject) {
-            zlib.inflateRaw(Buffer.from(jwe.plaintext), function(err, data) {
-              if (err) {
-                reject(err);
-              }
-              else {
-                jwe.payload = jwe.plaintext = data;
-                resolve(jwe);
-              }
-            });
+            try {
+              var data = pako.inflateRaw(Buffer.from(jwe.plaintext))
+
+              jwe.payload = jwe.plaintext = Buffer.from(data);
+              resolve(jwe);
+            } catch (err) {
+              reject(err);
+            }
           });
         }
+
         return jwe;
       });
 

lib/jwe/encrypt.js

@@ -10,7 +10,7 @@ var lodash = require("lodash"),
     generateCEK = require("./helpers").generateCEK,
     JWK = require("../jwk"),
     slice = require("./helpers").slice,
-    zlib = require("zlib"),
+    pako = require("pako"),
     CONSTANTS = require("../algorithms/constants");
 
 var assign = lodash.assign;
@@ -369,15 +369,14 @@ function JWEEncrypter(cfg, fields, recipients) {
           return jwe;
         } else if (props.zip === "DEF") {
           return new Promise(function(resolve, reject) {
-            zlib.deflateRaw(Buffer.from(pdata, "binary"), function(err, data) {
-              if (err) {
-                reject(err);
-              }
-              else {
-                jwe.plaintext = data;
-                resolve(jwe);
-              }
-            });
+            try {
+              var data = pako.deflateRaw(Buffer.from(pdata, "binary"));
+
+              jwe.plaintext = data;
+              resolve(jwe);
+            } catch (error) {
+              reject(error);
+            }
           });
         }
         return Promise.reject(new Error("unsupported 'zip' mode"));

package.json

@@ -28,22 +28,21 @@
   },
   "browser": {
     "crypto": false,
-    "zlib": "browserify-zlib"
+    "zlib": "pako"
   },
   "react-native": {
     "crypto": false,
-    "zlib": "react-zlib-js"
+    "zlib": "pako"
   },
   "dependencies": {
     "base64url": "^3.0.1",
-    "browserify-zlib": "^0.2.0",
     "buffer": "^5.5.0",
     "es6-promise": "^4.2.8",
     "lodash": "^4.17.15",
     "long": "^4.0.0",
     "node-forge": "^0.8.5",
+    "pako": "^1.0.11",
     "process": "^0.11.10",
-    "react-zlib-js": "^1.0.4",
     "uuid": "^3.3.3"
   },
   "devDependencies": {