Fix array length Allocation failed issue when Message is huge

[fanazhe]

When using crypto-js to encrypt and decrypt a file larger than 400MB, the program always crashes and says "FATAL ERROR: invalid array length Allocation failed - JavaScript heap out of memory".
After some research I found crypto-js directly access some array elements which have large index, which caused V8 engine to crash.
This answer https://stackoverflow.com/questions/55465821/55474570 is related.

[evanvosberg]

@julkwiec @Alanscut would you be up to review this.

[Alanscut]

@fanazhe would you mind adding a test case? I don't known which algorithom module you used, more information help us verified your PR :)

[fanazhe]

@Alanscut I've pushed more code to fix huge array length issues.

The test code is quite slow running on my computer and I believe it is not suitable to run in browser, so I didn't put it into test folder but only pasted it here.

const path = './build/';

const length = 400 * 1024 * 1024; // 400MB
const message = 'A'.repeat(length);
const privateKey = 'abcdefghijklmnopqrstuvwxyz0123456789';

// Begin large message test
require(path + 'md5')(message); console.log('md5 done');
require(path + 'ripemd160')(message); console.log('ripemd160 done');
require(path + 'sha1')(message); console.log('sha1 done');
require(path + 'sha3')(message); console.log('sha3 done');
require(path + 'sha224')(message); console.log('sha224 done');
require(path + 'sha256')(message); console.log('sha256 done');
require(path + 'sha384')(message); console.log('sha384 done');
require(path + 'sha512')(message); console.log('sha512 done');
require(path + 'hmac-md5')(message, privateKey); console.log('hmac-md5 done');
require(path + 'hmac-ripemd160')(message, privateKey); console.log('hmac-ripemd160 done');
require(path + 'hmac-sha1')(message, privateKey); console.log('hmac-sha1 done');
require(path + 'hmac-sha3')(message, privateKey); console.log('hmac-sha3 done');
require(path + 'hmac-sha224')(message, privateKey); console.log('hmac-sha224 done');
require(path + 'hmac-sha256')(message, privateKey); console.log('hmac-sha256 done');
require(path + 'hmac-sha384')(message, privateKey); console.log('hmac-sha384 done');
require(path + 'hmac-sha512')(message, privateKey); console.log('hmac-sha512 done');
// Done large message test

You can use this code to verify my PR. Thanks!

[peter100u]

why i not found yours answer