Complete Email Sortierer implementation with Appwrite and Stripe integration

server/node_modules/stripe/cjs/crypto/SubtleCryptoProvider.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.SubtleCryptoProvider = void 0;
+const CryptoProvider_js_1 = require("./CryptoProvider.js");
+/**
+ * `CryptoProvider which uses the SubtleCrypto interface of the Web Crypto API.
+ *
+ * This only supports asynchronous operations.
+ */
+class SubtleCryptoProvider extends CryptoProvider_js_1.CryptoProvider {
+    constructor(subtleCrypto) {
+        super();
+        // If no subtle crypto is interface, default to the global namespace. This
+        // is to allow custom interfaces (eg. using the Node webcrypto interface in
+        // tests).
+        this.subtleCrypto = subtleCrypto || crypto.subtle;
+    }
+    /** @override */
+    computeHMACSignature(payload, secret) {
+        throw new CryptoProvider_js_1.CryptoProviderOnlySupportsAsyncError('SubtleCryptoProvider cannot be used in a synchronous context.');
+    }
+    /** @override */
+    async computeHMACSignatureAsync(payload, secret) {
+        const encoder = new TextEncoder();
+        const key = await this.subtleCrypto.importKey('raw', encoder.encode(secret), {
+            name: 'HMAC',
+            hash: { name: 'SHA-256' },
+        }, false, ['sign']);
+        const signatureBuffer = await this.subtleCrypto.sign('hmac', key, encoder.encode(payload));
+        // crypto.subtle returns the signature in base64 format. This must be
+        // encoded in hex to match the CryptoProvider contract. We map each byte in
+        // the buffer to its corresponding hex octet and then combine into a string.
+        const signatureBytes = new Uint8Array(signatureBuffer);
+        const signatureHexCodes = new Array(signatureBytes.length);
+        for (let i = 0; i < signatureBytes.length; i++) {
+            signatureHexCodes[i] = byteHexMapping[signatureBytes[i]];
+        }
+        return signatureHexCodes.join('');
+    }
+}
+exports.SubtleCryptoProvider = SubtleCryptoProvider;
+// Cached mapping of byte to hex representation. We do this once to avoid re-
+// computing every time we need to convert the result of a signature to hex.
+const byteHexMapping = new Array(256);
+for (let i = 0; i < byteHexMapping.length; i++) {
+    byteHexMapping[i] = i.toString(16).padStart(2, '0');
+}