初始化环境文件

node_modules/@aws-crypto/sha256-browser/src/crossPlatformSha256.ts

@@ -0,0 +1,30 @@
+import { Sha256 as WebCryptoSha256 } from "./webCryptoSha256";
+import { Sha256 as JsSha256 } from "@aws-crypto/sha256-js";
+import { Checksum, SourceData } from "@aws-sdk/types";
+import { supportsWebCrypto } from "@aws-crypto/supports-web-crypto";
+import { locateWindow } from "@aws-sdk/util-locate-window";
+import { convertToBuffer } from "@aws-crypto/util";
+
+export class Sha256 implements Checksum {
+  private hash: Checksum;
+
+  constructor(secret?: SourceData) {
+    if (supportsWebCrypto(locateWindow())) {
+      this.hash = new WebCryptoSha256(secret);
+    } else {
+      this.hash = new JsSha256(secret);
+    }
+  }
+
+  update(data: SourceData, encoding?: "utf8" | "ascii" | "latin1"): void {
+    this.hash.update(convertToBuffer(data));
+  }
+
+  digest(): Promise<Uint8Array> {
+    return this.hash.digest();
+  }
+
+  reset(): void {
+    this.hash.reset();
+  }
+}