some progress

node_modules/mongodb/lib/cmap/auth/mongocr.js

@@ -0,0 +1,44 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.MongoCR = void 0;
+const crypto = require("crypto");
+const error_1 = require("../../error");
+const utils_1 = require("../../utils");
+const auth_provider_1 = require("./auth_provider");
+class MongoCR extends auth_provider_1.AuthProvider {
+    auth(authContext, callback) {
+        const { connection, credentials } = authContext;
+        if (!credentials) {
+            return callback(new error_1.MongoMissingCredentialsError('AuthContext must provide credentials.'));
+        }
+        const username = credentials.username;
+        const password = credentials.password;
+        const source = credentials.source;
+        connection.command((0, utils_1.ns)(`${source}.$cmd`), { getnonce: 1 }, undefined, (err, r) => {
+            let nonce = null;
+            let key = null;
+            // Get nonce
+            if (err == null) {
+                nonce = r.nonce;
+                // Use node md5 generator
+                let md5 = crypto.createHash('md5');
+                // Generate keys used for authentication
+                md5.update(`${username}:mongo:${password}`, 'utf8');
+                const hash_password = md5.digest('hex');
+                // Final key
+                md5 = crypto.createHash('md5');
+                md5.update(nonce + username + hash_password, 'utf8');
+                key = md5.digest('hex');
+            }
+            const authenticateCommand = {
+                authenticate: 1,
+                user: username,
+                nonce,
+                key
+            };
+            connection.command((0, utils_1.ns)(`${source}.$cmd`), authenticateCommand, undefined, callback);
+        });
+    }
+}
+exports.MongoCR = MongoCR;
+//# sourceMappingURL=mongocr.js.map