@ivujs/i-utils
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前端模块化 JavaScript 工具库
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JavaScript
'use strict';
/**
* 纯前端 SHA256/SHA224 实现（无 Node.js 依赖，兼容所有浏览器）
* 核心逻辑借鉴 js-sha256，移除所有服务端相关代码，仅保留浏览器环境实现
*/
// ========== 核心常量 ==========
const ERROR = "input is invalid type";
const HEX_CHARS = "0123456789abcdef".split("");
const EXTRA = [-2147483648, 8388608, 32768, 128];
const SHIFT = [24, 16, 8, 0];
// SHA256 常量 K
const K = [
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98,
0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786,
0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 0x983e5152, 0xa831c66d, 0xb00327c8,
0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819,
0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7,
0xc67178f2,
];
// ========== SHA256 核心类 ==========
class Sha256 {
constructor(is224 = false) {
// 初始化区块数组（仅浏览器环境，无需共享内存）
this.blocks = new Array(17).fill(0);
// 初始化哈希值（SHA224/SHA256 不同初始值）
if (is224) {
this.h0 = 0xc1059ed8;
this.h1 = 0x367cd507;
this.h2 = 0x3070dd17;
this.h3 = 0xf70e5939;
this.h4 = 0xffc00b31;
this.h5 = 0x68581511;
this.h6 = 0x64f98fa7;
this.h7 = 0xbefa4fa4;
}
else {
this.h0 = 0x6a09e667;
this.h1 = 0xbb67ae85;
this.h2 = 0x3c6ef372;
this.h3 = 0xa54ff53a;
this.h4 = 0x510e527f;
this.h5 = 0x9b05688c;
this.h6 = 0x1f83d9ab;
this.h7 = 0x5be0cd19;
}
// 状态变量初始化
this.block = this.start = this.bytes = this.hBytes = 0;
this.finalized = this.hashed = false;
this.first = true;
this.is224 = is224;
}
// 更新哈希（处理输入数据）
update(message) {
if (this.finalized)
return this;
// 校验输入类型
let notString = false;
const type = typeof message;
if (type !== "string") {
if (type === "object") {
if (message === null)
throw new Error(ERROR);
// 支持 ArrayBuffer/Uint8Array
if (message.constructor === ArrayBuffer) {
message = new Uint8Array(message);
}
else if (!Array.isArray(message) && !ArrayBuffer.isView(message)) {
throw new Error(ERROR);
}
}
else {
throw new Error(ERROR);
}
notString = true;
}
let code, index = 0, i, length = message.length;
const blocks = this.blocks;
while (index < length) {
if (this.hashed) {
this.hashed = false;
blocks.fill(0);
blocks[0] = this.block;
}
// 处理字符串/字节数组
if (notString) {
for (i = this.start; index < length && i < 64; ++index) {
blocks[i >>> 2] |= message[index] << SHIFT[i++ & 3];
}
}
else {
for (i = this.start; index < length && i < 64; ++index) {
code = message.charCodeAt(index);
// UTF-8 编码处理
if (code < 0x80) {
blocks[i >>> 2] |= code << SHIFT[i++ & 3];
}
else if (code < 0x800) {
blocks[i >>> 2] |= (0xc0 | (code >>> 6)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
}
else if (code < 0xd800 || code >= 0xe000) {
blocks[i >>> 2] |= (0xe0 | (code >>> 12)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | ((code >>> 6) & 0x3f)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
}
else {
// 处理代理对
code = 0x10000 + (((code & 0x3ff) << 10) | (message.charCodeAt(++index) & 0x3ff));
blocks[i >>> 2] |= (0xf0 | (code >>> 18)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | ((code >>> 12) & 0x3f)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | ((code >>> 6) & 0x3f)) << SHIFT[i++ & 3];
blocks[i >>> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
}
}
}
this.lastByteIndex = i;
this.bytes += i - this.start;
// 区块满 64 字节，进行哈希计算
if (i >= 64) {
this.block = blocks[16];
this.start = i - 64;
this.hash();
this.hashed = true;
}
else {
this.start = i;
}
}
// 处理字节长度溢出
if (this.bytes > 4294967295) {
this.hBytes += (this.bytes / 4294967296) << 0;
this.bytes = this.bytes % 4294967296;
}
return this;
}
// 核心哈希计算
hash() {
let a = this.h0, b = this.h1, c = this.h2, d = this.h3;
let e = this.h4, f = this.h5, g = this.h6, h = this.h7;
const blocks = this.blocks;
let j, s0, s1, maj, t1, t2, ch, ab, da, cd, bc;
// 扩展区块
for (j = 16; j < 64; ++j) {
t1 = blocks[j - 15];
s0 = ((t1 >>> 7) | (t1 << 25)) ^ ((t1 >>> 18) | (t1 << 14)) ^ (t1 >>> 3);
t1 = blocks[j - 2];
s1 = ((t1 >>> 17) | (t1 << 15)) ^ ((t1 >>> 19) | (t1 << 13)) ^ (t1 >>> 10);
blocks[j] = (blocks[j - 16] + s0 + blocks[j - 7] + s1) << 0;
}
bc = b & c;
// 64 轮哈希计算
for (j = 0; j < 64; j += 4) {
if (this.first) {
if (this.is224) {
ab = 300032;
t1 = blocks[0] - 1413257819;
h = (t1 - 150054599) << 0;
d = (t1 + 24177077) << 0;
}
else {
ab = 704751109;
t1 = blocks[0] - 210244248;
h = (t1 - 1521486534) << 0;
d = (t1 + 143694565) << 0;
}
this.first = false;
}
else {
s0 = ((a >>> 2) | (a << 30)) ^ ((a >>> 13) | (a << 19)) ^ ((a >>> 22) | (a << 10));
s1 = ((e >>> 6) | (e << 26)) ^ ((e >>> 11) | (e << 21)) ^ ((e >>> 25) | (e << 7));
ab = a & b;
maj = ab ^ (a & c) ^ bc;
ch = (e & f) ^ (~e & g);
t1 = h + s1 + ch + K[j] + blocks[j];
t2 = s0 + maj;
h = (d + t1) << 0;
d = (t1 + t2) << 0;
}
s0 = ((d >>> 2) | (d << 30)) ^ ((d >>> 13) | (d << 19)) ^ ((d >>> 22) | (d << 10));
s1 = ((h >>> 6) | (h << 26)) ^ ((h >>> 11) | (h << 21)) ^ ((h >>> 25) | (h << 7));
da = d & a;
maj = da ^ (d & b) ^ ab;
ch = (h & e) ^ (~h & f);
t1 = g + s1 + ch + K[j + 1] + blocks[j + 1];
t2 = s0 + maj;
g = (c + t1) << 0;
c = (t1 + t2) << 0;
s0 = ((c >>> 2) | (c << 30)) ^ ((c >>> 13) | (c << 19)) ^ ((c >>> 22) | (c << 10));
s1 = ((g >>> 6) | (g << 26)) ^ ((g >>> 11) | (g << 21)) ^ ((g >>> 25) | (g << 7));
cd = c & d;
maj = cd ^ (c & a) ^ da;
ch = (g & h) ^ (~g & e);
t1 = f + s1 + ch + K[j + 2] + blocks[j + 2];
t2 = s0 + maj;
f = (b + t1) << 0;
b = (t1 + t2) << 0;
s0 = ((b >>> 2) | (b << 30)) ^ ((b >>> 13) | (b << 19)) ^ ((b >>> 22) | (b << 10));
s1 = ((f >>> 6) | (f << 26)) ^ ((f >>> 11) | (f << 21)) ^ ((f >>> 25) | (f << 7));
bc = b & c;
maj = bc ^ (b & d) ^ cd;
ch = (f & g) ^ (~f & h);
t1 = e + s1 + ch + K[j + 3] + blocks[j + 3];
t2 = s0 + maj;
e = (a + t1) << 0;
a = (t1 + t2) << 0;
}
// 更新哈希值
this.h0 = (this.h0 + a) << 0;
this.h1 = (this.h1 + b) << 0;
this.h2 = (this.h2 + c) << 0;
this.h3 = (this.h3 + d) << 0;
this.h4 = (this.h4 + e) << 0;
this.h5 = (this.h5 + f) << 0;
this.h6 = (this.h6 + g) << 0;
this.h7 = (this.h7 + h) << 0;
}
// 完成哈希计算（补位）
finalize() {
if (this.finalized)
return this;
this.finalized = true;
const blocks = this.blocks;
let i = this.lastByteIndex;
blocks[16] = this.block;
blocks[i >>> 2] |= EXTRA[i & 3];
this.block = blocks[16];
// 补位处理
if (i >= 56) {
if (!this.hashed)
this.hash();
blocks.fill(0);
blocks[0] = this.block;
}
// 写入长度信息
blocks[14] = (this.hBytes << 3) | (this.bytes >>> 29);
blocks[15] = this.bytes << 3;
this.hash();
return this;
}
// 输出十六进制字符串
hex() {
this.finalize();
const h0 = this.h0, h1 = this.h1, h2 = this.h2, h3 = this.h3;
const h4 = this.h4, h5 = this.h5, h6 = this.h6, h7 = this.h7;
let hex = "";
// 拼接哈希值为十六进制
hex +=
HEX_CHARS[(h0 >>> 28) & 0x0f] +
HEX_CHARS[(h0 >>> 24) & 0x0f] +
HEX_CHARS[(h0 >>> 20) & 0x0f] +
HEX_CHARS[(h0 >>> 16) & 0x0f] +
HEX_CHARS[(h0 >>> 12) & 0x0f] +
HEX_CHARS[(h0 >>> 8) & 0x0f] +
HEX_CHARS[(h0 >>> 4) & 0x0f] +
HEX_CHARS[h0 & 0x0f];
hex +=
HEX_CHARS[(h1 >>> 28) & 0x0f] +
HEX_CHARS[(h1 >>> 24) & 0x0f] +
HEX_CHARS[(h1 >>> 20) & 0x0f] +
HEX_CHARS[(h1 >>> 16) & 0x0f] +
HEX_CHARS[(h1 >>> 12) & 0x0f] +
HEX_CHARS[(h1 >>> 8) & 0x0f] +
HEX_CHARS[(h1 >>> 4) & 0x0f] +
HEX_CHARS[h1 & 0x0f];
hex +=
HEX_CHARS[(h2 >>> 28) & 0x0f] +
HEX_CHARS[(h2 >>> 24) & 0x0f] +
HEX_CHARS[(h2 >>> 20) & 0x0f] +
HEX_CHARS[(h2 >>> 16) & 0x0f] +
HEX_CHARS[(h2 >>> 12) & 0x0f] +
HEX_CHARS[(h2 >>> 8) & 0x0f] +
HEX_CHARS[(h2 >>> 4) & 0x0f] +
HEX_CHARS[h2 & 0x0f];
hex +=
HEX_CHARS[(h3 >>> 28) & 0x0f] +
HEX_CHARS[(h3 >>> 24) & 0x0f] +
HEX_CHARS[(h3 >>> 20) & 0x0f] +
HEX_CHARS[(h3 >>> 16) & 0x0f] +
HEX_CHARS[(h3 >>> 12) & 0x0f] +
HEX_CHARS[(h3 >>> 8) & 0x0f] +
HEX_CHARS[(h3 >>> 4) & 0x0f] +
HEX_CHARS[h3 & 0x0f];
hex +=
HEX_CHARS[(h4 >>> 28) & 0x0f] +
HEX_CHARS[(h4 >>> 24) & 0x0f] +
HEX_CHARS[(h4 >>> 20) & 0x0f] +
HEX_CHARS[(h4 >>> 16) & 0x0f] +
HEX_CHARS[(h4 >>> 12) & 0x0f] +
HEX_CHARS[(h4 >>> 8) & 0x0f] +
HEX_CHARS[(h4 >>> 4) & 0x0f] +
HEX_CHARS[h4 & 0x0f];
hex +=
HEX_CHARS[(h5 >>> 28) & 0x0f] +
HEX_CHARS[(h5 >>> 24) & 0x0f] +
HEX_CHARS[(h5 >>> 20) & 0x0f] +
HEX_CHARS[(h5 >>> 16) & 0x0f] +
HEX_CHARS[(h5 >>> 12) & 0x0f] +
HEX_CHARS[(h5 >>> 8) & 0x0f] +
HEX_CHARS[(h5 >>> 4) & 0x0f] +
HEX_CHARS[h5 & 0x0f];
hex +=
HEX_CHARS[(h6 >>> 28) & 0x0f] +
HEX_CHARS[(h6 >>> 24) & 0x0f] +
HEX_CHARS[(h6 >>> 20) & 0x0f] +
HEX_CHARS[(h6 >>> 16) & 0x0f] +
HEX_CHARS[(h6 >>> 12) & 0x0f] +
HEX_CHARS[(h6 >>> 8) & 0x0f] +
HEX_CHARS[(h6 >>> 4) & 0x0f] +
HEX_CHARS[h6 & 0x0f];
// SHA224 不需要 h7
if (!this.is224) {
hex +=
HEX_CHARS[(h7 >>> 28) & 0x0f] +
HEX_CHARS[(h7 >>> 24) & 0x0f] +
HEX_CHARS[(h7 >>> 20) & 0x0f] +
HEX_CHARS[(h7 >>> 16) & 0x0f] +
HEX_CHARS[(h7 >>> 12) & 0x0f] +
HEX_CHARS[(h7 >>> 8) & 0x0f] +
HEX_CHARS[(h7 >>> 4) & 0x0f] +
HEX_CHARS[h7 & 0x0f];
}
return hex;
}
// 输出字节数组
digest() {
this.finalize();
const h0 = this.h0, h1 = this.h1, h2 = this.h2, h3 = this.h3;
const h4 = this.h4, h5 = this.h5, h6 = this.h6, h7 = this.h7;
const arr = [
(h0 >>> 24) & 0xff,
(h0 >>> 16) & 0xff,
(h0 >>> 8) & 0xff,
h0 & 0xff,
(h1 >>> 24) & 0xff,
(h1 >>> 16) & 0xff,
(h1 >>> 8) & 0xff,
h1 & 0xff,
(h2 >>> 24) & 0xff,
(h2 >>> 16) & 0xff,
(h2 >>> 8) & 0xff,
h2 & 0xff,
(h3 >>> 24) & 0xff,
(h3 >>> 16) & 0xff,
(h3 >>> 8) & 0xff,
h3 & 0xff,
(h4 >>> 24) & 0xff,
(h4 >>> 16) & 0xff,
(h4 >>> 8) & 0xff,
h4 & 0xff,
(h5 >>> 24) & 0xff,
(h5 >>> 16) & 0xff,
(h5 >>> 8) & 0xff,
h5 & 0xff,
(h6 >>> 24) & 0xff,
(h6 >>> 16) & 0xff,
(h6 >>> 8) & 0xff,
h6 & 0xff,
];
if (!this.is224) {
arr.push((h7 >>> 24) & 0xff, (h7 >>> 16) & 0xff, (h7 >>> 8) & 0xff, h7 & 0xff);
}
return arr;
}
// 输出二进制原始字符串（raw）
raw() {
this.finalize();
const bytes = this.digest();
let rawStr = "";
for (let i = 0; i < bytes.length; i++) {
rawStr += String.fromCharCode(bytes[i]);
}
return rawStr;
}
// 输出 ArrayBuffer
arrayBuffer() {
this.finalize();
const buffer = new ArrayBuffer(this.is224 ? 28 : 32);
const dataView = new DataView(buffer);
dataView.setUint32(0, this.h0);
dataView.setUint32(4, this.h1);
dataView.setUint32(8, this.h2);
dataView.setUint32(12, this.h3);
dataView.setUint32(16, this.h4);
dataView.setUint32(20, this.h5);
dataView.setUint32(24, this.h6);
if (!this.is224) {
dataView.setUint32(28, this.h7);
}
return buffer;
}
}
// ========== HMAC-SHA256 实现 ==========
class HmacSha256 {
constructor(key, is224 = false) {
// 处理密钥
let keyBytes = [];
const type = typeof key;
if (type === "string") {
// 字符串密钥转字节数组
let code, index = 0, length = key.length;
for (let i = 0; i < length; ++i) {
code = key.charCodeAt(i);
if (code < 0x80) {
keyBytes[index++] = code;
}
else if (code < 0x800) {
keyBytes[index++] = 0xc0 | (code >>> 6);
keyBytes[index++] = 0x80 | (code & 0x3f);
}
else if (code < 0xd800 || code >= 0xe000) {
keyBytes[index++] = 0xe0 | (code >>> 12);
keyBytes[index++] = 0x80 | ((code >>> 6) & 0x3f);
keyBytes[index++] = 0x80 | (code & 0x3f);
}
else {
code = 0x10000 + (((code & 0x3ff) << 10) | (key.charCodeAt(++i) & 0x3ff));
keyBytes[index++] = 0xf0 | (code >>> 18);
keyBytes[index++] = 0x80 | ((code >>> 12) & 0x3f);
keyBytes[index++] = 0x80 | ((code >>> 6) & 0x3f);
keyBytes[index++] = 0x80 | (code & 0x3f);
}
}
}
else if (type === "object") {
if (key === null)
throw new Error(ERROR);
if (key.constructor === ArrayBuffer) {
keyBytes = Array.from(new Uint8Array(key));
}
else if (Array.isArray(key) || ArrayBuffer.isView(key)) {
keyBytes = Array.from(key);
}
else {
throw new Error(ERROR);
}
}
else {
throw new Error(ERROR);
}
// 密钥长度超过 64 字节，先哈希
if (keyBytes.length > 64) {
keyBytes = new Sha256(is224).update(keyBytes).digest();
}
// 生成内外填充
const oKeyPad = [];
const iKeyPad = [];
for (let i = 0; i < 64; ++i) {
const b = keyBytes[i] || 0;
oKeyPad[i] = 0x5c ^ b;
iKeyPad[i] = 0x36 ^ b;
}
// 初始化 SHA256
this.sha256 = new Sha256(is224);
this.sha256.update(iKeyPad);
this.oKeyPad = oKeyPad;
this.is224 = is224;
this.inner = true;
}
update(message) {
this.sha256.update(message);
return this;
}
finalize() {
if (this.inner) {
// 计算内部哈希
const innerHash = this.sha256.digest();
// 初始化外部哈希
this.sha256 = new Sha256(this.is224);
this.sha256.update(this.oKeyPad).update(innerHash);
this.inner = false;
}
this.sha256.finalize();
return this;
}
hex() {
this.finalize();
return this.sha256.hex();
}
digest() {
this.finalize();
return this.sha256.digest();
}
raw() {
this.finalize();
return this.sha256.raw();
}
arrayBuffer() {
this.finalize();
return this.sha256.arrayBuffer();
}
}
// ========== 便捷方法封装 ==========
const createMethod = (is224 = false) => {
const method = (message) => new Sha256(is224).update(message).hex();
method.raw = (message) => new Sha256(is224).update(message).raw();
method.digest = (message) => new Sha256(is224).update(message).digest();
method.arrayBuffer = (message) => new Sha256(is224).update(message).arrayBuffer();
method.create = () => new Sha256(is224);
method.update = (message) => method.create().update(message);
return method;
};
const createRawMethod = (is224 = false) => {
const method = (message) => new Sha256(is224).update(message).raw();
method.hex = (message) => new Sha256(is224).update(message).hex();
method.digest = (message) => new Sha256(is224).update(message).digest();
method.arrayBuffer = (message) => new Sha256(is224).update(message).arrayBuffer();
method.create = () => new Sha256(is224);
method.update = (message) => method.create().update(message);
return method;
};
const createHmacMethod = (is224 = false) => {
const method = (key, message) => new HmacSha256(key, is224).update(message).hex();
method.raw = (key, message) => new HmacSha256(key, is224).update(message).raw();
method.digest = (key, message) => new HmacSha256(key, is224).update(message).digest();
method.arrayBuffer = (key, message) => new HmacSha256(key, is224).update(message).arrayBuffer();
method.create = (key) => new HmacSha256(key, is224);
method.update = (key, message) => method.create(key).update(message);
return method;
};
const createHmacRawMethod = (is224 = false) => {
const method = (key, message) => new HmacSha256(key, is224).update(message).raw();
method.hex = (key, message) => new HmacSha256(key, is224).update(message).hex();
method.digest = (key, message) => new HmacSha256(key, is224).update(message).digest();
method.arrayBuffer = (key, message) => new HmacSha256(key, is224).update(message).arrayBuffer();
method.create = (key) => new HmacSha256(key, is224);
method.update = (key, message) => method.create(key).update(message);
return method;
};
/* 以下是内部实现需要的es模块化导出方法 */
// SHA256 基础方法
const sha256 = createMethod();
// SHA256 基础方法原始值
const sha256_raw = createRawMethod();
// HMAC-SHA256
const sha256_hmac = createHmacMethod();
// HMAC-SHA256原始值
const sha256_hmac_raw = createHmacRawMethod();
// SHA224 基础方法
const sha224 = createMethod(true);
// SHA224 基础方法原始值
const sha224_raw = createRawMethod(true);
// HMAC-SHA224
const sha224_hmac = createHmacMethod(true);
// HMAC-SHA224原始值
const sha224_hmac_raw = createHmacRawMethod(true);
exports.sha224 = sha224;
exports.sha224_hmac = sha224_hmac;
exports.sha224_hmac_raw = sha224_hmac_raw;
exports.sha224_raw = sha224_raw;
exports.sha256 = sha256;
exports.sha256_hmac = sha256_hmac;
exports.sha256_hmac_raw = sha256_hmac_raw;
exports.sha256_raw = sha256_raw;