@aws-sdk/md5-js
Version:
[](https://www.npmjs.com/package/@aws-sdk/md5-js) [](https://www.npmjs.com/package/@aws-sdk/md5-js)
170 lines • 37.4 kB
JavaScript
import { __awaiter, __generator } from "tslib";
import { fromUtf8 } from "@aws-sdk/util-utf8-node";
import { BLOCK_SIZE, DIGEST_LENGTH, INIT } from "./constants";
var Md5 = /** @class */ (function () {
function Md5() {
this.state = Uint32Array.from(INIT);
this.buffer = new DataView(new ArrayBuffer(BLOCK_SIZE));
this.bufferLength = 0;
this.bytesHashed = 0;
this.finished = false;
}
Md5.prototype.update = function (sourceData) {
if (isEmptyData(sourceData)) {
return;
}
else if (this.finished) {
throw new Error("Attempted to update an already finished hash.");
}
var data = convertToBuffer(sourceData);
var position = 0;
var byteLength = data.byteLength;
this.bytesHashed += byteLength;
while (byteLength > 0) {
this.buffer.setUint8(this.bufferLength++, data[position++]);
byteLength--;
if (this.bufferLength === BLOCK_SIZE) {
this.hashBuffer();
this.bufferLength = 0;
}
}
};
Md5.prototype.digest = function () {
return __awaiter(this, void 0, void 0, function () {
var _a, buffer, undecoratedLength, bytesHashed, bitsHashed, i, i, out, i;
return __generator(this, function (_b) {
if (!this.finished) {
_a = this, buffer = _a.buffer, undecoratedLength = _a.bufferLength, bytesHashed = _a.bytesHashed;
bitsHashed = bytesHashed * 8;
buffer.setUint8(this.bufferLength++, 128);
// Ensure the final block has enough room for the hashed length
if (undecoratedLength % BLOCK_SIZE >= BLOCK_SIZE - 8) {
for (i = this.bufferLength; i < BLOCK_SIZE; i++) {
buffer.setUint8(i, 0);
}
this.hashBuffer();
this.bufferLength = 0;
}
for (i = this.bufferLength; i < BLOCK_SIZE - 8; i++) {
buffer.setUint8(i, 0);
}
buffer.setUint32(BLOCK_SIZE - 8, bitsHashed >>> 0, true);
buffer.setUint32(BLOCK_SIZE - 4, Math.floor(bitsHashed / 0x100000000), true);
this.hashBuffer();
this.finished = true;
}
out = new DataView(new ArrayBuffer(DIGEST_LENGTH));
for (i = 0; i < 4; i++) {
out.setUint32(i * 4, this.state[i], true);
}
return [2 /*return*/, new Uint8Array(out.buffer, out.byteOffset, out.byteLength)];
});
});
};
Md5.prototype.hashBuffer = function () {
var _a = this, buffer = _a.buffer, state = _a.state;
var a = state[0], b = state[1], c = state[2], d = state[3];
a = ff(a, b, c, d, buffer.getUint32(0, true), 7, 0xd76aa478);
d = ff(d, a, b, c, buffer.getUint32(4, true), 12, 0xe8c7b756);
c = ff(c, d, a, b, buffer.getUint32(8, true), 17, 0x242070db);
b = ff(b, c, d, a, buffer.getUint32(12, true), 22, 0xc1bdceee);
a = ff(a, b, c, d, buffer.getUint32(16, true), 7, 0xf57c0faf);
d = ff(d, a, b, c, buffer.getUint32(20, true), 12, 0x4787c62a);
c = ff(c, d, a, b, buffer.getUint32(24, true), 17, 0xa8304613);
b = ff(b, c, d, a, buffer.getUint32(28, true), 22, 0xfd469501);
a = ff(a, b, c, d, buffer.getUint32(32, true), 7, 0x698098d8);
d = ff(d, a, b, c, buffer.getUint32(36, true), 12, 0x8b44f7af);
c = ff(c, d, a, b, buffer.getUint32(40, true), 17, 0xffff5bb1);
b = ff(b, c, d, a, buffer.getUint32(44, true), 22, 0x895cd7be);
a = ff(a, b, c, d, buffer.getUint32(48, true), 7, 0x6b901122);
d = ff(d, a, b, c, buffer.getUint32(52, true), 12, 0xfd987193);
c = ff(c, d, a, b, buffer.getUint32(56, true), 17, 0xa679438e);
b = ff(b, c, d, a, buffer.getUint32(60, true), 22, 0x49b40821);
a = gg(a, b, c, d, buffer.getUint32(4, true), 5, 0xf61e2562);
d = gg(d, a, b, c, buffer.getUint32(24, true), 9, 0xc040b340);
c = gg(c, d, a, b, buffer.getUint32(44, true), 14, 0x265e5a51);
b = gg(b, c, d, a, buffer.getUint32(0, true), 20, 0xe9b6c7aa);
a = gg(a, b, c, d, buffer.getUint32(20, true), 5, 0xd62f105d);
d = gg(d, a, b, c, buffer.getUint32(40, true), 9, 0x02441453);
c = gg(c, d, a, b, buffer.getUint32(60, true), 14, 0xd8a1e681);
b = gg(b, c, d, a, buffer.getUint32(16, true), 20, 0xe7d3fbc8);
a = gg(a, b, c, d, buffer.getUint32(36, true), 5, 0x21e1cde6);
d = gg(d, a, b, c, buffer.getUint32(56, true), 9, 0xc33707d6);
c = gg(c, d, a, b, buffer.getUint32(12, true), 14, 0xf4d50d87);
b = gg(b, c, d, a, buffer.getUint32(32, true), 20, 0x455a14ed);
a = gg(a, b, c, d, buffer.getUint32(52, true), 5, 0xa9e3e905);
d = gg(d, a, b, c, buffer.getUint32(8, true), 9, 0xfcefa3f8);
c = gg(c, d, a, b, buffer.getUint32(28, true), 14, 0x676f02d9);
b = gg(b, c, d, a, buffer.getUint32(48, true), 20, 0x8d2a4c8a);
a = hh(a, b, c, d, buffer.getUint32(20, true), 4, 0xfffa3942);
d = hh(d, a, b, c, buffer.getUint32(32, true), 11, 0x8771f681);
c = hh(c, d, a, b, buffer.getUint32(44, true), 16, 0x6d9d6122);
b = hh(b, c, d, a, buffer.getUint32(56, true), 23, 0xfde5380c);
a = hh(a, b, c, d, buffer.getUint32(4, true), 4, 0xa4beea44);
d = hh(d, a, b, c, buffer.getUint32(16, true), 11, 0x4bdecfa9);
c = hh(c, d, a, b, buffer.getUint32(28, true), 16, 0xf6bb4b60);
b = hh(b, c, d, a, buffer.getUint32(40, true), 23, 0xbebfbc70);
a = hh(a, b, c, d, buffer.getUint32(52, true), 4, 0x289b7ec6);
d = hh(d, a, b, c, buffer.getUint32(0, true), 11, 0xeaa127fa);
c = hh(c, d, a, b, buffer.getUint32(12, true), 16, 0xd4ef3085);
b = hh(b, c, d, a, buffer.getUint32(24, true), 23, 0x04881d05);
a = hh(a, b, c, d, buffer.getUint32(36, true), 4, 0xd9d4d039);
d = hh(d, a, b, c, buffer.getUint32(48, true), 11, 0xe6db99e5);
c = hh(c, d, a, b, buffer.getUint32(60, true), 16, 0x1fa27cf8);
b = hh(b, c, d, a, buffer.getUint32(8, true), 23, 0xc4ac5665);
a = ii(a, b, c, d, buffer.getUint32(0, true), 6, 0xf4292244);
d = ii(d, a, b, c, buffer.getUint32(28, true), 10, 0x432aff97);
c = ii(c, d, a, b, buffer.getUint32(56, true), 15, 0xab9423a7);
b = ii(b, c, d, a, buffer.getUint32(20, true), 21, 0xfc93a039);
a = ii(a, b, c, d, buffer.getUint32(48, true), 6, 0x655b59c3);
d = ii(d, a, b, c, buffer.getUint32(12, true), 10, 0x8f0ccc92);
c = ii(c, d, a, b, buffer.getUint32(40, true), 15, 0xffeff47d);
b = ii(b, c, d, a, buffer.getUint32(4, true), 21, 0x85845dd1);
a = ii(a, b, c, d, buffer.getUint32(32, true), 6, 0x6fa87e4f);
d = ii(d, a, b, c, buffer.getUint32(60, true), 10, 0xfe2ce6e0);
c = ii(c, d, a, b, buffer.getUint32(24, true), 15, 0xa3014314);
b = ii(b, c, d, a, buffer.getUint32(52, true), 21, 0x4e0811a1);
a = ii(a, b, c, d, buffer.getUint32(16, true), 6, 0xf7537e82);
d = ii(d, a, b, c, buffer.getUint32(44, true), 10, 0xbd3af235);
c = ii(c, d, a, b, buffer.getUint32(8, true), 15, 0x2ad7d2bb);
b = ii(b, c, d, a, buffer.getUint32(36, true), 21, 0xeb86d391);
state[0] = (a + state[0]) & 0xffffffff;
state[1] = (b + state[1]) & 0xffffffff;
state[2] = (c + state[2]) & 0xffffffff;
state[3] = (d + state[3]) & 0xffffffff;
};
return Md5;
}());
export { Md5 };
function cmn(q, a, b, x, s, t) {
a = (((a + q) & 0xffffffff) + ((x + t) & 0xffffffff)) & 0xffffffff;
return (((a << s) | (a >>> (32 - s))) + b) & 0xffffffff;
}
function ff(a, b, c, d, x, s, t) {
return cmn((b & c) | (~b & d), a, b, x, s, t);
}
function gg(a, b, c, d, x, s, t) {
return cmn((b & d) | (c & ~d), a, b, x, s, t);
}
function hh(a, b, c, d, x, s, t) {
return cmn(b ^ c ^ d, a, b, x, s, t);
}
function ii(a, b, c, d, x, s, t) {
return cmn(c ^ (b | ~d), a, b, x, s, t);
}
function isEmptyData(data) {
if (typeof data === "string") {
return data.length === 0;
}
return data.byteLength === 0;
}
function convertToBuffer(data) {
if (typeof data === "string") {
return fromUtf8(data);
}
if (ArrayBuffer.isView(data)) {
return new Uint8Array(data.buffer, data.byteOffset, data.byteLength / Uint8Array.BYTES_PER_ELEMENT);
}
return new Uint8Array(data);
}
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{ Hash, SourceData } from \"@aws-sdk/types\";\nimport { fromUtf8 } from \"@aws-sdk/util-utf8-node\";\n\nimport { BLOCK_SIZE, DIGEST_LENGTH, INIT } from \"./constants\";\n\nexport class Md5 implements Hash {\n  private state = Uint32Array.from(INIT);\n  private buffer: DataView = new DataView(new ArrayBuffer(BLOCK_SIZE));\n  private bufferLength = 0;\n  private bytesHashed = 0;\n  private finished = false;\n\n  update(sourceData: SourceData): void {\n    if (isEmptyData(sourceData)) {\n      return;\n    } else if (this.finished) {\n      throw new Error(\"Attempted to update an already finished hash.\");\n    }\n\n    const data = convertToBuffer(sourceData);\n\n    let position = 0;\n    let { byteLength } = data;\n    this.bytesHashed += byteLength;\n\n    while (byteLength > 0) {\n      this.buffer.setUint8(this.bufferLength++, data[position++]);\n      byteLength--;\n\n      if (this.bufferLength === BLOCK_SIZE) {\n        this.hashBuffer();\n        this.bufferLength = 0;\n      }\n    }\n  }\n\n  async digest(): Promise<Uint8Array> {\n    if (!this.finished) {\n      const { buffer, bufferLength: undecoratedLength, bytesHashed } = this;\n      const bitsHashed = bytesHashed * 8;\n      buffer.setUint8(this.bufferLength++, 0b10000000);\n\n      // Ensure the final block has enough room for the hashed length\n      if (undecoratedLength % BLOCK_SIZE >= BLOCK_SIZE - 8) {\n        for (let i = this.bufferLength; i < BLOCK_SIZE; i++) {\n          buffer.setUint8(i, 0);\n        }\n        this.hashBuffer();\n        this.bufferLength = 0;\n      }\n\n      for (let i = this.bufferLength; i < BLOCK_SIZE - 8; i++) {\n        buffer.setUint8(i, 0);\n      }\n      buffer.setUint32(BLOCK_SIZE - 8, bitsHashed >>> 0, true);\n      buffer.setUint32(BLOCK_SIZE - 4, Math.floor(bitsHashed / 0x100000000), true);\n\n      this.hashBuffer();\n\n      this.finished = true;\n    }\n\n    const out = new DataView(new ArrayBuffer(DIGEST_LENGTH));\n    for (let i = 0; i < 4; i++) {\n      out.setUint32(i * 4, this.state[i], true);\n    }\n\n    return new Uint8Array(out.buffer, out.byteOffset, out.byteLength);\n  }\n\n  private hashBuffer(): void {\n    const { buffer, state } = this;\n\n    let a = state[0],\n      b = state[1],\n      c = state[2],\n      d = state[3];\n\n    a = ff(a, b, c, d, buffer.getUint32(0, true), 7, 0xd76aa478);\n    d = ff(d, a, b, c, buffer.getUint32(4, true), 12, 0xe8c7b756);\n    c = ff(c, d, a, b, buffer.getUint32(8, true), 17, 0x242070db);\n    b = ff(b, c, d, a, buffer.getUint32(12, true), 22, 0xc1bdceee);\n    a = ff(a, b, c, d, buffer.getUint32(16, true), 7, 0xf57c0faf);\n    d = ff(d, a, b, c, buffer.getUint32(20, true), 12, 0x4787c62a);\n    c = ff(c, d, a, b, buffer.getUint32(24, true), 17, 0xa8304613);\n    b = ff(b, c, d, a, buffer.getUint32(28, true), 22, 0xfd469501);\n    a = ff(a, b, c, d, buffer.getUint32(32, true), 7, 0x698098d8);\n    d = ff(d, a, b, c, buffer.getUint32(36, true), 12, 0x8b44f7af);\n    c = ff(c, d, a, b, buffer.getUint32(40, true), 17, 0xffff5bb1);\n    b = ff(b, c, d, a, buffer.getUint32(44, true), 22, 0x895cd7be);\n    a = ff(a, b, c, d, buffer.getUint32(48, true), 7, 0x6b901122);\n    d = ff(d, a, b, c, buffer.getUint32(52, true), 12, 0xfd987193);\n    c = ff(c, d, a, b, buffer.getUint32(56, true), 17, 0xa679438e);\n    b = ff(b, c, d, a, buffer.getUint32(60, true), 22, 0x49b40821);\n\n    a = gg(a, b, c, d, buffer.getUint32(4, true), 5, 0xf61e2562);\n    d = gg(d, a, b, c, buffer.getUint32(24, true), 9, 0xc040b340);\n    c = gg(c, d, a, b, buffer.getUint32(44, true), 14, 0x265e5a51);\n    b = gg(b, c, d, a, buffer.getUint32(0, true), 20, 0xe9b6c7aa);\n    a = gg(a, b, c, d, buffer.getUint32(20, true), 5, 0xd62f105d);\n    d = gg(d, a, b, c, buffer.getUint32(40, true), 9, 0x02441453);\n    c = gg(c, d, a, b, buffer.getUint32(60, true), 14, 0xd8a1e681);\n    b = gg(b, c, d, a, buffer.getUint32(16, true), 20, 0xe7d3fbc8);\n    a = gg(a, b, c, d, buffer.getUint32(36, true), 5, 0x21e1cde6);\n    d = gg(d, a, b, c, buffer.getUint32(56, true), 9, 0xc33707d6);\n    c = gg(c, d, a, b, buffer.getUint32(12, true), 14, 0xf4d50d87);\n    b = gg(b, c, d, a, buffer.getUint32(32, true), 20, 0x455a14ed);\n    a = gg(a, b, c, d, buffer.getUint32(52, true), 5, 0xa9e3e905);\n    d = gg(d, a, b, c, buffer.getUint32(8, true), 9, 0xfcefa3f8);\n    c = gg(c, d, a, b, buffer.getUint32(28, true), 14, 0x676f02d9);\n    b = gg(b, c, d, a, buffer.getUint32(48, true), 20, 0x8d2a4c8a);\n\n    a = hh(a, b, c, d, buffer.getUint32(20, true), 4, 0xfffa3942);\n    d = hh(d, a, b, c, buffer.getUint32(32, true), 11, 0x8771f681);\n    c = hh(c, d, a, b, buffer.getUint32(44, true), 16, 0x6d9d6122);\n    b = hh(b, c, d, a, buffer.getUint32(56, true), 23, 0xfde5380c);\n    a = hh(a, b, c, d, buffer.getUint32(4, true), 4, 0xa4beea44);\n    d = hh(d, a, b, c, buffer.getUint32(16, true), 11, 0x4bdecfa9);\n    c = hh(c, d, a, b, buffer.getUint32(28, true), 16, 0xf6bb4b60);\n    b = hh(b, c, d, a, buffer.getUint32(40, true), 23, 0xbebfbc70);\n    a = hh(a, b, c, d, buffer.getUint32(52, true), 4, 0x289b7ec6);\n    d = hh(d, a, b, c, buffer.getUint32(0, true), 11, 0xeaa127fa);\n    c = hh(c, d, a, b, buffer.getUint32(12, true), 16, 0xd4ef3085);\n    b = hh(b, c, d, a, buffer.getUint32(24, true), 23, 0x04881d05);\n    a = hh(a, b, c, d, buffer.getUint32(36, true), 4, 0xd9d4d039);\n    d = hh(d, a, b, c, buffer.getUint32(48, true), 11, 0xe6db99e5);\n    c = hh(c, d, a, b, buffer.getUint32(60, true), 16, 0x1fa27cf8);\n    b = hh(b, c, d, a, buffer.getUint32(8, true), 23, 0xc4ac5665);\n\n    a = ii(a, b, c, d, buffer.getUint32(0, true), 6, 0xf4292244);\n    d = ii(d, a, b, c, buffer.getUint32(28, true), 10, 0x432aff97);\n    c = ii(c, d, a, b, buffer.getUint32(56, true), 15, 0xab9423a7);\n    b = ii(b, c, d, a, buffer.getUint32(20, true), 21, 0xfc93a039);\n    a = ii(a, b, c, d, buffer.getUint32(48, true), 6, 0x655b59c3);\n    d = ii(d, a, b, c, buffer.getUint32(12, true), 10, 0x8f0ccc92);\n    c = ii(c, d, a, b, buffer.getUint32(40, true), 15, 0xffeff47d);\n    b = ii(b, c, d, a, buffer.getUint32(4, true), 21, 0x85845dd1);\n    a = ii(a, b, c, d, buffer.getUint32(32, true), 6, 0x6fa87e4f);\n    d = ii(d, a, b, c, buffer.getUint32(60, true), 10, 0xfe2ce6e0);\n    c = ii(c, d, a, b, buffer.getUint32(24, true), 15, 0xa3014314);\n    b = ii(b, c, d, a, buffer.getUint32(52, true), 21, 0x4e0811a1);\n    a = ii(a, b, c, d, buffer.getUint32(16, true), 6, 0xf7537e82);\n    d = ii(d, a, b, c, buffer.getUint32(44, true), 10, 0xbd3af235);\n    c = ii(c, d, a, b, buffer.getUint32(8, true), 15, 0x2ad7d2bb);\n    b = ii(b, c, d, a, buffer.getUint32(36, true), 21, 0xeb86d391);\n\n    state[0] = (a + state[0]) & 0xffffffff;\n    state[1] = (b + state[1]) & 0xffffffff;\n    state[2] = (c + state[2]) & 0xffffffff;\n    state[3] = (d + state[3]) & 0xffffffff;\n  }\n}\n\nfunction cmn(q: number, a: number, b: number, x: number, s: number, t: number) {\n  a = (((a + q) & 0xffffffff) + ((x + t) & 0xffffffff)) & 0xffffffff;\n  return (((a << s) | (a >>> (32 - s))) + b) & 0xffffffff;\n}\n\nfunction ff(a: number, b: number, c: number, d: number, x: number, s: number, t: number) {\n  return cmn((b & c) | (~b & d), a, b, x, s, t);\n}\n\nfunction gg(a: number, b: number, c: number, d: number, x: number, s: number, t: number) {\n  return cmn((b & d) | (c & ~d), a, b, x, s, t);\n}\n\nfunction hh(a: number, b: number, c: number, d: number, x: number, s: number, t: number) {\n  return cmn(b ^ c ^ d, a, b, x, s, t);\n}\n\nfunction ii(a: number, b: number, c: number, d: number, x: number, s: number, t: number) {\n  return cmn(c ^ (b | ~d), a, b, x, s, t);\n}\n\nfunction isEmptyData(data: SourceData): boolean {\n  if (typeof data === \"string\") {\n    return data.length === 0;\n  }\n\n  return data.byteLength === 0;\n}\n\nfunction convertToBuffer(data: SourceData): Uint8Array {\n  if (typeof data === \"string\") {\n    return fromUtf8(data);\n  }\n\n  if (ArrayBuffer.isView(data)) {\n    return new Uint8Array(data.buffer, data.byteOffset, data.byteLength / Uint8Array.BYTES_PER_ELEMENT);\n  }\n\n  return new Uint8Array(data);\n}\n"]}