From b39e287c2d9c4d4ebc2283af13dfa10ad2e7ca9c Mon Sep 17 00:00:00 2001
From: rishav-karanjit <rishavkj@amazon.com>
Date: Tue, 17 Feb 2026 15:55:34 -0800
Subject: [PATCH 1/2] rm ie 11

---
 modules/web-crypto-backend/package.json       |  1 -
 .../web-crypto-backend/src/backend-factory.ts |  2 -
 .../src/promisify-ms-crypto.ts                | 38 -------------------
 .../src/synchronous_random_values.ts          |  5 ---
 package-lock.json                             | 12 ------
 5 files changed, 58 deletions(-)
 delete mode 100644 modules/web-crypto-backend/src/promisify-ms-crypto.ts

diff --git a/modules/web-crypto-backend/package.json b/modules/web-crypto-backend/package.json
index 9bb91371a..38b70346f 100644
--- a/modules/web-crypto-backend/package.json
+++ b/modules/web-crypto-backend/package.json
@@ -19,7 +19,6 @@
   },
   "license": "Apache-2.0",
   "dependencies": {
-    "@aws-crypto/ie11-detection": "4.0.0",
     "@aws-crypto/supports-web-crypto": "5.2.0",
     "@aws-sdk/util-locate-window": "3.310.0",
     "tslib": "^2.2.0"
diff --git a/modules/web-crypto-backend/src/backend-factory.ts b/modules/web-crypto-backend/src/backend-factory.ts
index 289dd8a58..514885426 100644
--- a/modules/web-crypto-backend/src/backend-factory.ts
+++ b/modules/web-crypto-backend/src/backend-factory.ts
@@ -1,7 +1,6 @@
 // Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-import { isMsWindow } from '@aws-crypto/ie11-detection'
 import {
   supportsWebCrypto,
   supportsSubtleCrypto,
@@ -140,7 +139,6 @@ export function pluckSubtleCrypto(window: Window): MaybeSubtleCrypto {
   // if needed webkitSubtle check should be added here
   // see: https://webkit.org/blog/7790/update-on-web-cryptography/
   if (supportsWebCrypto(window)) return window.crypto.subtle
-  if (isMsWindow(window)) return promisifyMsSubtleCrypto(window.msCrypto.subtle)
   return false
 }
 
diff --git a/modules/web-crypto-backend/src/promisify-ms-crypto.ts b/modules/web-crypto-backend/src/promisify-ms-crypto.ts
deleted file mode 100644
index 4c17e629f..000000000
--- a/modules/web-crypto-backend/src/promisify-ms-crypto.ts
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0
-
-import { MsSubtleCrypto } from '@aws-crypto/ie11-detection'
-
-type MsSubtleFunctions = keyof MsSubtleCrypto
-
-export default function promisifyMsSubtleCrypto(backend: MsSubtleCrypto) {
-  const usages: MsSubtleFunctions[] = [
-    'decrypt',
-    'digest',
-    'encrypt',
-    'exportKey',
-    'generateKey',
-    'importKey',
-    'sign',
-    'verify',
-  ]
-  const decorateUsage = (fakeBackend: any, usage: MsSubtleFunctions) =>
-    decorate(backend, fakeBackend, usage)
-  return usages.reduce(decorateUsage, {}) as SubtleCrypto
-}
-
-function decorate(
-  subtle: MsSubtleCrypto,
-  fakeBackend: any,
-  name: MsSubtleFunctions
-) {
-  fakeBackend[name] = async (...args: any[]) => {
-    return new Promise((resolve, reject) => {
-      // @ts-ignore
-      const operation = subtle[name](...args)
-      operation.oncomplete = () => resolve(operation.result)
-      operation.onerror = reject
-    })
-  }
-  return fakeBackend
-}
diff --git a/modules/web-crypto-backend/src/synchronous_random_values.ts b/modules/web-crypto-backend/src/synchronous_random_values.ts
index 0a0147c06..86cfdba3e 100644
--- a/modules/web-crypto-backend/src/synchronous_random_values.ts
+++ b/modules/web-crypto-backend/src/synchronous_random_values.ts
@@ -1,7 +1,6 @@
 // Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-import { isMsWindow } from '@aws-crypto/ie11-detection'
 import { supportsSecureRandom } from '@aws-crypto/supports-web-crypto'
 import { locateWindow } from '@aws-sdk/util-locate-window'
 
@@ -19,10 +18,6 @@ export function generateSynchronousRandomValues(
   return function synchronousRandomValues(byteLength: number): Uint8Array {
     if (supportsSecureRandom(globalScope)) {
       return globalScope.crypto.getRandomValues(new Uint8Array(byteLength))
-    } else if (isMsWindow(globalScope)) {
-      const values = new Uint8Array(byteLength)
-      globalScope.msCrypto.getRandomValues(values)
-      return values
     }
 
     throw new Error(`Unable to locate a secure random source.`)
diff --git a/package-lock.json b/package-lock.json
index 16310b417..e5bea0bb0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -711,23 +711,11 @@
       "version": "4.0.1",
       "license": "Apache-2.0",
       "dependencies": {
-        "@aws-crypto/ie11-detection": "4.0.0",
         "@aws-crypto/supports-web-crypto": "5.2.0",
         "@aws-sdk/util-locate-window": "3.310.0",
         "tslib": "^2.2.0"
       }
     },
-    "modules/web-crypto-backend/node_modules/@aws-crypto/ie11-detection": {
-      "version": "4.0.0",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "tslib": "^1.11.1"
-      }
-    },
-    "modules/web-crypto-backend/node_modules/@aws-crypto/ie11-detection/node_modules/tslib": {
-      "version": "1.14.1",
-      "license": "0BSD"
-    },
     "modules/web-crypto-backend/node_modules/@aws-sdk/util-locate-window": {
       "version": "3.310.0",
       "license": "Apache-2.0",

From 9e57f2d35adb868c5fdf4873076b57d58a950b73 Mon Sep 17 00:00:00 2001
From: rishav-karanjit <rishavkj@amazon.com>
Date: Tue, 17 Feb 2026 16:03:18 -0800
Subject: [PATCH 2/2] empty commit