Re: [quicwg/base-drafts] ChaCha inputs (#2171)

Martin Thomson <> Fri, 06 September 2019 00:10 UTC

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From: Martin Thomson <>
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Subject: Re: [quicwg/base-drafts] ChaCha inputs (#2171)
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The API I have takes `const uint8_t nonce[12], uint32_t counter`.  PKCS#11 takes pointers just like the API @nharper refers to (but it fails to specify the endianness, which is a critical oversight, compounded by the fact that the size of the counter can vary).

I suspect that - as @kazuho says - the right idea is to note that ChaCha20 will interpret the nonce as three little-endian integers and that the counter might be expressed as a byte sequence that is then (probably) interpreted as a little-endian integer.

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