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crypto: fixup randomFill size and offset handling #38138

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crypto: fixup randomFill size and offset handling #38138

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crypto: fixup randomFill size and offset handling
jasnell Apr 7, 2021
1e91615
[Squash] nit
jasnell Apr 8, 2021
4643682
[Squash] nit
jasnell Apr 8, 2021
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6 changes: 3 additions & 3 deletions lib/internal/crypto/random.js
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Original file line number Diff line number Diff line change
Expand Up @@ -155,10 +155,11 @@ function randomFill(buf, offset, size, callback) {
if (typeof offset === 'function') {
callback = offset;
offset = 0;
size = buf.bytesLength;
// Size is a length here, assertSize() call turns it into a number of bytes
size = buf.length;
} else if (typeof size === 'function') {
callback = size;
size = buf.byteLength - offset;
size = buf.length - offset;
} else {
validateCallback(callback);
}
Expand All @@ -176,7 +177,6 @@ function randomFill(buf, offset, size, callback) {
return;
}

// TODO(@jasnell): This is not yet handling byte offsets right
const job = new RandomBytesJob(
kCryptoJobAsync,
buf,
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7 changes: 7 additions & 0 deletions test/parallel/test-crypto-random.js
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Original file line number Diff line number Diff line change
Expand Up @@ -525,3 +525,10 @@ assert.throws(
assert.throws(() => crypto.randomInt(0, 1, i), cbError);
});
}

{
// Verify that it doesn't throw or abort
crypto.randomFill(new Uint16Array(10), 0, common.mustSucceed());
crypto.randomFill(new Uint32Array(10), 0, common.mustSucceed());
crypto.randomFill(new Uint32Array(10), 0, 1, common.mustSucceed());
}