mirror of
https://github.com/mozilla/pdf.js.git
synced 2025-04-19 14:48:08 +02:00
Move the calculateSHA256 function into its own file
This allows us to remove a closure, and we also change the code to initialize various constants lazily.
This commit is contained in:
Jonas Jenwald
parent
3e8d01ad7c
commit
a1eac86037
3 changed files with 165 additions and 142 deletions
163
src/core/calculate_sha256.js
Normal file
163
src/core/calculate_sha256.js
Normal file
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@ -0,0 +1,163 @@
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/* Copyright 2012 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { shadow } from "../shared/util.js";
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const PARAMS = {
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get k() {
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return shadow(
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this,
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"k",
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[
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1,
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0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
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0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786,
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0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
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0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
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0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b,
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0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
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0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
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0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,
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]
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);
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},
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};
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function rotr(x, n) {
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return (x >>> n) | (x << (32 - n));
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}
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function ch(x, y, z) {
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return (x & y) ^ (~x & z);
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}
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function maj(x, y, z) {
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return (x & y) ^ (x & z) ^ (y & z);
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}
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function sigma(x) {
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return rotr(x, 2) ^ rotr(x, 13) ^ rotr(x, 22);
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}
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function sigmaPrime(x) {
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return rotr(x, 6) ^ rotr(x, 11) ^ rotr(x, 25);
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}
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function littleSigma(x) {
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return rotr(x, 7) ^ rotr(x, 18) ^ (x >>> 3);
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}
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function littleSigmaPrime(x) {
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return rotr(x, 17) ^ rotr(x, 19) ^ (x >>> 10);
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}
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function calculateSHA256(data, offset, length) {
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// initial hash values
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let h0 = 0x6a09e667,
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h1 = 0xbb67ae85,
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h2 = 0x3c6ef372,
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h3 = 0xa54ff53a,
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h4 = 0x510e527f,
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h5 = 0x9b05688c,
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h6 = 0x1f83d9ab,
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h7 = 0x5be0cd19;
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// pre-processing
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const paddedLength = Math.ceil((length + 9) / 64) * 64;
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const padded = new Uint8Array(paddedLength);
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let i, j;
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for (i = 0; i < length; ++i) {
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padded[i] = data[offset++];
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}
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padded[i++] = 0x80;
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const n = paddedLength - 8;
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while (i < n) {
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padded[i++] = 0;
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}
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padded[i++] = 0;
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padded[i++] = 0;
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padded[i++] = 0;
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padded[i++] = (length >>> 29) & 0xff;
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padded[i++] = (length >> 21) & 0xff;
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padded[i++] = (length >> 13) & 0xff;
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padded[i++] = (length >> 5) & 0xff;
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padded[i++] = (length << 3) & 0xff;
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const w = new Uint32Array(64);
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const { k } = PARAMS;
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// for each 512 bit block
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for (i = 0; i < paddedLength; ) {
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for (j = 0; j < 16; ++j) {
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w[j] =
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(padded[i] << 24) |
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(padded[i + 1] << 16) |
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(padded[i + 2] << 8) |
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padded[i + 3];
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i += 4;
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}
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for (j = 16; j < 64; ++j) {
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w[j] =
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(littleSigmaPrime(w[j - 2]) +
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w[j - 7] +
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littleSigma(w[j - 15]) +
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w[j - 16]) |
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0;
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}
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let a = h0,
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b = h1,
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c = h2,
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d = h3,
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e = h4,
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f = h5,
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g = h6,
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h = h7,
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t1,
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t2;
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for (j = 0; j < 64; ++j) {
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t1 = h + sigmaPrime(e) + ch(e, f, g) + k[j] + w[j];
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t2 = sigma(a) + maj(a, b, c);
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h = g;
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g = f;
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f = e;
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e = (d + t1) | 0;
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d = c;
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c = b;
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b = a;
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a = (t1 + t2) | 0;
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}
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h0 = (h0 + a) | 0;
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h1 = (h1 + b) | 0;
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h2 = (h2 + c) | 0;
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h3 = (h3 + d) | 0;
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h4 = (h4 + e) | 0;
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h5 = (h5 + f) | 0;
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h6 = (h6 + g) | 0;
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h7 = (h7 + h) | 0;
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}
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// prettier-ignore
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return new Uint8Array([
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(h0 >> 24) & 0xFF, (h0 >> 16) & 0xFF, (h0 >> 8) & 0xFF, (h0) & 0xFF,
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(h1 >> 24) & 0xFF, (h1 >> 16) & 0xFF, (h1 >> 8) & 0xFF, (h1) & 0xFF,
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(h2 >> 24) & 0xFF, (h2 >> 16) & 0xFF, (h2 >> 8) & 0xFF, (h2) & 0xFF,
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(h3 >> 24) & 0xFF, (h3 >> 16) & 0xFF, (h3 >> 8) & 0xFF, (h3) & 0xFF,
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(h4 >> 24) & 0xFF, (h4 >> 16) & 0xFF, (h4 >> 8) & 0xFF, (h4) & 0xFF,
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(h5 >> 24) & 0xFF, (h5 >> 16) & 0xFF, (h5 >> 8) & 0xFF, (h5) & 0xFF,
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(h6 >> 24) & 0xFF, (h6 >> 16) & 0xFF, (h6 >> 8) & 0xFF, (h6) & 0xFF,
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(h7 >> 24) & 0xFF, (h7 >> 16) & 0xFF, (h7 >> 8) & 0xFF, (h7) & 0xFF
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]);
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}
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export { calculateSHA256 };
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@ -26,6 +26,7 @@ import {
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} from "../shared/util.js";
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import { Dict, isName, Name } from "./primitives.js";
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import { calculateMD5 } from "./calculate_md5.js";
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import { calculateSHA256 } from "./calculate_sha256.js";
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import { DecryptStream } from "./decrypt_stream.js";
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class ARCFourCipher {
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@ -163,146 +164,6 @@ class Word64 {
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}
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}
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const calculateSHA256 = (function calculateSHA256Closure() {
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function rotr(x, n) {
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return (x >>> n) | (x << (32 - n));
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}
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function ch(x, y, z) {
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return (x & y) ^ (~x & z);
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}
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function maj(x, y, z) {
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return (x & y) ^ (x & z) ^ (y & z);
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}
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function sigma(x) {
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return rotr(x, 2) ^ rotr(x, 13) ^ rotr(x, 22);
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}
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function sigmaPrime(x) {
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return rotr(x, 6) ^ rotr(x, 11) ^ rotr(x, 25);
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}
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function littleSigma(x) {
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return rotr(x, 7) ^ rotr(x, 18) ^ (x >>> 3);
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}
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function littleSigmaPrime(x) {
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return rotr(x, 17) ^ rotr(x, 19) ^ (x >>> 10);
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}
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const k = [
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1,
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0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
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0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786,
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0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
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0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
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0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b,
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0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
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0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
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0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,
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];
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function hash(data, offset, length) {
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// initial hash values
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let h0 = 0x6a09e667,
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h1 = 0xbb67ae85,
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h2 = 0x3c6ef372,
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h3 = 0xa54ff53a,
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h4 = 0x510e527f,
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h5 = 0x9b05688c,
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h6 = 0x1f83d9ab,
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h7 = 0x5be0cd19;
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// pre-processing
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const paddedLength = Math.ceil((length + 9) / 64) * 64;
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const padded = new Uint8Array(paddedLength);
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let i, j;
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for (i = 0; i < length; ++i) {
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padded[i] = data[offset++];
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}
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padded[i++] = 0x80;
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const n = paddedLength - 8;
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while (i < n) {
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padded[i++] = 0;
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}
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padded[i++] = 0;
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padded[i++] = 0;
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padded[i++] = 0;
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padded[i++] = (length >>> 29) & 0xff;
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padded[i++] = (length >> 21) & 0xff;
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padded[i++] = (length >> 13) & 0xff;
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padded[i++] = (length >> 5) & 0xff;
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padded[i++] = (length << 3) & 0xff;
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const w = new Uint32Array(64);
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// for each 512 bit block
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for (i = 0; i < paddedLength; ) {
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for (j = 0; j < 16; ++j) {
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w[j] =
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(padded[i] << 24) |
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(padded[i + 1] << 16) |
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(padded[i + 2] << 8) |
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padded[i + 3];
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i += 4;
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}
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for (j = 16; j < 64; ++j) {
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w[j] =
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(littleSigmaPrime(w[j - 2]) +
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w[j - 7] +
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littleSigma(w[j - 15]) +
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w[j - 16]) |
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0;
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}
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let a = h0,
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b = h1,
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c = h2,
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d = h3,
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e = h4,
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f = h5,
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g = h6,
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h = h7,
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t1,
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t2;
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for (j = 0; j < 64; ++j) {
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t1 = h + sigmaPrime(e) + ch(e, f, g) + k[j] + w[j];
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t2 = sigma(a) + maj(a, b, c);
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h = g;
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g = f;
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f = e;
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e = (d + t1) | 0;
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d = c;
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c = b;
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b = a;
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a = (t1 + t2) | 0;
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}
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h0 = (h0 + a) | 0;
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h1 = (h1 + b) | 0;
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h2 = (h2 + c) | 0;
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h3 = (h3 + d) | 0;
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h4 = (h4 + e) | 0;
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h5 = (h5 + f) | 0;
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h6 = (h6 + g) | 0;
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h7 = (h7 + h) | 0;
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}
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// prettier-ignore
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return new Uint8Array([
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(h0 >> 24) & 0xFF, (h0 >> 16) & 0xFF, (h0 >> 8) & 0xFF, (h0) & 0xFF,
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(h1 >> 24) & 0xFF, (h1 >> 16) & 0xFF, (h1 >> 8) & 0xFF, (h1) & 0xFF,
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(h2 >> 24) & 0xFF, (h2 >> 16) & 0xFF, (h2 >> 8) & 0xFF, (h2) & 0xFF,
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(h3 >> 24) & 0xFF, (h3 >> 16) & 0xFF, (h3 >> 8) & 0xFF, (h3) & 0xFF,
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(h4 >> 24) & 0xFF, (h4 >> 16) & 0xFF, (h4 >> 8) & 0xFF, (h4) & 0xFF,
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(h5 >> 24) & 0xFF, (h5 >> 16) & 0xFF, (h5 >> 8) & 0xFF, (h5) & 0xFF,
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(h6 >> 24) & 0xFF, (h6 >> 16) & 0xFF, (h6 >> 8) & 0xFF, (h6) & 0xFF,
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(h7 >> 24) & 0xFF, (h7 >> 16) & 0xFF, (h7 >> 8) & 0xFF, (h7) & 0xFF
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]);
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}
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return hash;
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})();
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const calculateSHA512 = (function calculateSHA512Closure() {
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function ch(result, x, y, z, tmp) {
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result.assign(x);
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@ -1749,7 +1610,6 @@ export {
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AES128Cipher,
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AES256Cipher,
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ARCFourCipher,
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calculateSHA256,
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calculateSHA384,
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calculateSHA512,
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CipherTransformFactory,
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@ -17,7 +17,6 @@ import {
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AES128Cipher,
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AES256Cipher,
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ARCFourCipher,
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calculateSHA256,
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calculateSHA384,
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calculateSHA512,
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CipherTransformFactory,
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@ -31,6 +30,7 @@ import {
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stringToBytes,
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} from "../../src/shared/util.js";
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import { calculateMD5 } from "../../src/core/calculate_md5.js";
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import { calculateSHA256 } from "../../src/core/calculate_sha256.js";
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describe("crypto", function () {
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function hex2binary(s) {
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