Drop support for SHA1 checksums

Also remove an unused function and switch to crypto.randomUUID() for
savegame ID generation.

package.json

@@ -28,7 +28,6 @@
         "debounce-promise": "^3.1.2",
         "howler": "^2.1.2",
         "lz-string": "^1.4.4",
-        "rusha": "^0.8.13",
         "semver": "^7.3.5"
     },
     "devDependencies": {

src/js/core/read_write_proxy.js

@@ -9,7 +9,7 @@ import { IS_DEBUG, globalConfig } from "./config";
 import { ExplainedResult } from "./explained_result";
 import { createLogger } from "./logging";
 import { compressX64, decompressX64 } from "./lzstring";
-import { CRC_PREFIX, computeCrc, sha1 } from "./sensitive_utils.encrypt";
+import { computeCrc } from "./sensitive_utils.encrypt";
 
 import debounce from "debounce-promise";
 
@@ -109,9 +109,7 @@ export class ReadWriteProxy {
         const checksum = decompressed.substring(0, 40);
         const jsonString = decompressed.substr(40);
 
-        const desiredChecksum = checksum.startsWith(CRC_PREFIX)
+        const desiredChecksum = computeCrc(jsonString + salt);
-            ? computeCrc(jsonString + salt)
-            : sha1(jsonString + salt);
 
         if (desiredChecksum !== checksum) {
             // Checksum mismatch
@@ -198,11 +196,9 @@ export class ReadWriteProxy {
 
                         // Compare stored checksum with actual checksum
                         const checksum = decompressed.substring(0, 40);
-                        const jsonString = decompressed.substr(40);
+                        const jsonString = decompressed.slice(40);
 
-                        const desiredChecksum = checksum.startsWith(CRC_PREFIX)
+                        const desiredChecksum = computeCrc(jsonString + salt);
-                            ? computeCrc(jsonString + salt)
-                            : sha1(jsonString + salt);
 
                         if (desiredChecksum !== checksum) {
                             // Checksum mismatch

src/js/core/sensitive_utils.encrypt.js

@@ -1,15 +1,4 @@
-import { createHash } from "rusha";
 import crc32 from "crc/crc32";
-import { decompressX64 } from "./lzstring";
-
-export function sha1(str) {
-    return createHash().update(str).digest("hex");
-}
-
-// Window.location.host
-export function getNameOfProvider() {
-    return window[decompressX64("DYewxghgLgliB2Q")][decompressX64("BYewzgLgdghgtgUyA")];
-}
 
 // Distinguish legacy crc prefixes
 export const CRC_PREFIX = "crc32".padEnd(32, "-");

src/js/savegame/savegame_manager.js

@@ -1,12 +1,10 @@
+import { globalConfig } from "../core/config";
 import { ExplainedResult } from "../core/explained_result";
 import { createLogger } from "../core/logging";
 import { ReadWriteProxy } from "../core/read_write_proxy";
-import { globalConfig } from "../core/config";
 import { Savegame } from "./savegame";
 const logger = createLogger("savegame_manager");
 
-import Rusha from "rusha";
-
 /**
  * @typedef {import("./savegame_typedefs").SavegamesData} SavegamesData
  * @typedef {import("./savegame_typedefs").SavegameMetadata} SavegameMetadata
@@ -217,9 +215,7 @@ export class SavegameManager extends ReadWriteProxy {
      * Helper method to generate a new internal savegame id
      */
     generateInternalId() {
-        return Rusha.createHash()
+        return self.crypto.randomUUID();
-            .update(Date.now() + "/" + Math.random())
-            .digest("hex");
     }
 
     // End

yarn.lock

@@ -8580,11 +8580,6 @@ run-parallel@^1.1.9:
   dependencies:
     queue-microtask "^1.2.2"
 
-rusha@^0.8.13:
-  version "0.8.14"
-  resolved "https://registry.yarnpkg.com/rusha/-/rusha-0.8.14.tgz#a977d0de9428406138b7bb90d3de5dcd024e2f68"
-  integrity sha512-cLgakCUf6PedEu15t8kbsjnwIFFR2D4RfL+W3iWFJ4iac7z4B0ZI8fxy4R3J956kAI68HclCFGL8MPoUVC3qVA==
-
 rx-lite@^3.1.2:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/rx-lite/-/rx-lite-3.1.2.tgz#19ce502ca572665f3b647b10939f97fd1615f102"