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fix random #142

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merged 5 commits into from
Feb 9, 2023
Merged

fix random #142

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6a8152c
fix random
turuslan Feb 9, 2023
6da43d8
Add CHANGELOG entry
tomaka Feb 9, 2023
ddbc771
CHANGELOG fix
tomaka Feb 9, 2023
e696148
Past tense
tomaka Feb 9, 2023
aaacb55
Merge branch 'main' into patch-1
tomaka Feb 9, 2023
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1 change: 1 addition & 0 deletions bin/wasm-node/CHANGELOG.md
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Expand Up @@ -4,6 +4,7 @@

### Fixed

- Fix randomness not being implemented properly, leading to the same random numbers always being generated. This issues leads to all instances of smoldot (even on different machines) always using the same networking key, which would lead to connectivity issues when multiple instances of smoldot connect to the same full node. Note that because perfect forward secrecy is used, it is not possible to retroactively decipher networking communications. Additionally, the fact that the same random numbers are always generated made smoldot vulnerable to HashDoS attacks. ([#142](https://github.com/smol-dot/smoldot/pull/142))
- JSON-RPC requests without a `params` field are no longer invalid. ([#13](https://github.com/smol-dot/smoldot/pull/13))
- Fix Merkle proofs whose trie root node has a size inferior to 32 bytes being considered as invalid. ([#3046](https://github.com/paritytech/smoldot/pull/3046))

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6 changes: 3 additions & 3 deletions bin/wasm-node/javascript/src/instance/bindings-wasi.ts
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Expand Up @@ -66,10 +66,10 @@ export default (config: Config): WebAssembly.ModuleImports => {
len >>>= 0;

const baseBuffer = new Uint8Array(instance.exports.memory.buffer)
.slice(ptr, ptr + len);
.subarray(ptr, ptr + len);
for (let iter = 0; iter < len; iter += 65536) {
// `baseBuffer.slice` automatically saturates at the end of the buffer
config.getRandomValues(baseBuffer.slice(iter, iter + 65536))
// `baseBuffer.subarray` automatically saturates at the end of the buffer
config.getRandomValues(baseBuffer.subarray(iter, iter + 65536))
}

return 0;
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