v0.4.10 - api

node_modules/@noble/ciphers/utils.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.u64Lengths = exports.setBigUint64 = exports.wrapCipher = exports.Hash = exports.equalBytes = exports.checkOpts = exports.concatBytes = exports.toBytes = exports.bytesToUtf8 = exports.utf8ToBytes = exports.asyncLoop = exports.nextTick = exports.numberToBytesBE = exports.bytesToNumberBE = exports.hexToNumber = exports.hexToBytes = exports.bytesToHex = exports.isLE = exports.createView = exports.u32 = exports.u16 = exports.u8 = void 0;
+/*! noble-ciphers - MIT License (c) 2023 Paul Miller (paulmillr.com) */
+const _assert_js_1 = require("./_assert.js");
+// Cast array to different type
+const u8 = (arr) => new Uint8Array(arr.buffer, arr.byteOffset, arr.byteLength);
+exports.u8 = u8;
+const u16 = (arr) => new Uint16Array(arr.buffer, arr.byteOffset, Math.floor(arr.byteLength / 2));
+exports.u16 = u16;
+const u32 = (arr) => new Uint32Array(arr.buffer, arr.byteOffset, Math.floor(arr.byteLength / 4));
+exports.u32 = u32;
+// Cast array to view
+const createView = (arr) => new DataView(arr.buffer, arr.byteOffset, arr.byteLength);
+exports.createView = createView;
+// big-endian hardware is rare. Just in case someone still decides to run ciphers:
+// early-throw an error because we don't support BE yet.
+exports.isLE = new Uint8Array(new Uint32Array([0x11223344]).buffer)[0] === 0x44;
+if (!exports.isLE)
+    throw new Error('Non little-endian hardware is not supported');
+// Array where index 0xf0 (240) is mapped to string 'f0'
+const hexes = /* @__PURE__ */ Array.from({ length: 256 }, (_, i) => i.toString(16).padStart(2, '0'));
+/**
+ * @example bytesToHex(Uint8Array.from([0xca, 0xfe, 0x01, 0x23])) // 'cafe0123'
+ */
+function bytesToHex(bytes) {
+    (0, _assert_js_1.bytes)(bytes);
+    // pre-caching improves the speed 6x
+    let hex = '';
+    for (let i = 0; i < bytes.length; i++) {
+        hex += hexes[bytes[i]];
+    }
+    return hex;
+}
+exports.bytesToHex = bytesToHex;
+// We use optimized technique to convert hex string to byte array
+const asciis = { _0: 48, _9: 57, _A: 65, _F: 70, _a: 97, _f: 102 };
+function asciiToBase16(char) {
+    if (char >= asciis._0 && char <= asciis._9)
+        return char - asciis._0;
+    if (char >= asciis._A && char <= asciis._F)
+        return char - (asciis._A - 10);
+    if (char >= asciis._a && char <= asciis._f)
+        return char - (asciis._a - 10);
+    return;
+}
+/**
+ * @example hexToBytes('cafe0123') // Uint8Array.from([0xca, 0xfe, 0x01, 0x23])
+ */
+function hexToBytes(hex) {
+    if (typeof hex !== 'string')
+        throw new Error('hex string expected, got ' + typeof hex);
+    const hl = hex.length;
+    const al = hl / 2;
+    if (hl % 2)
+        throw new Error('padded hex string expected, got unpadded hex of length ' + hl);
+    const array = new Uint8Array(al);
+    for (let ai = 0, hi = 0; ai < al; ai++, hi += 2) {
+        const n1 = asciiToBase16(hex.charCodeAt(hi));
+        const n2 = asciiToBase16(hex.charCodeAt(hi + 1));
+        if (n1 === undefined || n2 === undefined) {
+            const char = hex[hi] + hex[hi + 1];
+            throw new Error('hex string expected, got non-hex character "' + char + '" at index ' + hi);
+        }
+        array[ai] = n1 * 16 + n2;
+    }
+    return array;
+}
+exports.hexToBytes = hexToBytes;
+function hexToNumber(hex) {
+    if (typeof hex !== 'string')
+        throw new Error('hex string expected, got ' + typeof hex);
+    // Big Endian
+    return BigInt(hex === '' ? '0' : `0x${hex}`);
+}
+exports.hexToNumber = hexToNumber;
+// BE: Big Endian, LE: Little Endian
+function bytesToNumberBE(bytes) {
+    return hexToNumber(bytesToHex(bytes));
+}
+exports.bytesToNumberBE = bytesToNumberBE;
+function numberToBytesBE(n, len) {
+    return hexToBytes(n.toString(16).padStart(len * 2, '0'));
+}
+exports.numberToBytesBE = numberToBytesBE;
+// There is no setImmediate in browser and setTimeout is slow.
+// call of async fn will return Promise, which will be fullfiled only on
+// next scheduler queue processing step and this is exactly what we need.
+const nextTick = async () => { };
+exports.nextTick = nextTick;
+// Returns control to thread each 'tick' ms to avoid blocking
+async function asyncLoop(iters, tick, cb) {
+    let ts = Date.now();
+    for (let i = 0; i < iters; i++) {
+        cb(i);
+        // Date.now() is not monotonic, so in case if clock goes backwards we return return control too
+        const diff = Date.now() - ts;
+        if (diff >= 0 && diff < tick)
+            continue;
+        await (0, exports.nextTick)();
+        ts += diff;
+    }
+}
+exports.asyncLoop = asyncLoop;
+/**
+ * @example utf8ToBytes('abc') // new Uint8Array([97, 98, 99])
+ */
+function utf8ToBytes(str) {
+    if (typeof str !== 'string')
+        throw new Error(`string expected, got ${typeof str}`);
+    return new Uint8Array(new TextEncoder().encode(str)); // https://bugzil.la/1681809
+}
+exports.utf8ToBytes = utf8ToBytes;
+/**
+ * @example bytesToUtf8(new Uint8Array([97, 98, 99])) // 'abc'
+ */
+function bytesToUtf8(bytes) {
+    return new TextDecoder().decode(bytes);
+}
+exports.bytesToUtf8 = bytesToUtf8;
+/**
+ * Normalizes (non-hex) string or Uint8Array to Uint8Array.
+ * Warning: when Uint8Array is passed, it would NOT get copied.
+ * Keep in mind for future mutable operations.
+ */
+function toBytes(data) {
+    if (typeof data === 'string')
+        data = utf8ToBytes(data);
+    else if ((0, _assert_js_1.isBytes)(data))
+        data = data.slice();
+    else
+        throw new Error(`Uint8Array expected, got ${typeof data}`);
+    return data;
+}
+exports.toBytes = toBytes;
+/**
+ * Copies several Uint8Arrays into one.
+ */
+function concatBytes(...arrays) {
+    let sum = 0;
+    for (let i = 0; i < arrays.length; i++) {
+        const a = arrays[i];
+        (0, _assert_js_1.bytes)(a);
+        sum += a.length;
+    }
+    const res = new Uint8Array(sum);
+    for (let i = 0, pad = 0; i < arrays.length; i++) {
+        const a = arrays[i];
+        res.set(a, pad);
+        pad += a.length;
+    }
+    return res;
+}
+exports.concatBytes = concatBytes;
+function checkOpts(defaults, opts) {
+    if (opts == null || typeof opts !== 'object')
+        throw new Error('options must be defined');
+    const merged = Object.assign(defaults, opts);
+    return merged;
+}
+exports.checkOpts = checkOpts;
+// Compares 2 u8a-s in kinda constant time
+function equalBytes(a, b) {
+    if (a.length !== b.length)
+        return false;
+    let diff = 0;
+    for (let i = 0; i < a.length; i++)
+        diff |= a[i] ^ b[i];
+    return diff === 0;
+}
+exports.equalBytes = equalBytes;
+// For runtime check if class implements interface
+class Hash {
+}
+exports.Hash = Hash;
+/**
+ * @__NO_SIDE_EFFECTS__
+ */
+const wrapCipher = (params, c) => {
+    Object.assign(c, params);
+    return c;
+};
+exports.wrapCipher = wrapCipher;
+// Polyfill for Safari 14
+function setBigUint64(view, byteOffset, value, isLE) {
+    if (typeof view.setBigUint64 === 'function')
+        return view.setBigUint64(byteOffset, value, isLE);
+    const _32n = BigInt(32);
+    const _u32_max = BigInt(0xffffffff);
+    const wh = Number((value >> _32n) & _u32_max);
+    const wl = Number(value & _u32_max);
+    const h = isLE ? 4 : 0;
+    const l = isLE ? 0 : 4;
+    view.setUint32(byteOffset + h, wh, isLE);
+    view.setUint32(byteOffset + l, wl, isLE);
+}
+exports.setBigUint64 = setBigUint64;
+function u64Lengths(ciphertext, AAD) {
+    const num = new Uint8Array(16);
+    const view = (0, exports.createView)(num);
+    setBigUint64(view, 0, BigInt(AAD ? AAD.length : 0), true);
+    setBigUint64(view, 8, BigInt(ciphertext.length), true);
+    return num;
+}
+exports.u64Lengths = u64Lengths;
+//# sourceMappingURL=utils.js.map