Commit d0a2b73b authored by Matt Caswell's avatar Matt Caswell
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Clarify the documentation on the use of ChaCha20 



Reviewed-by: default avatarTim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8780)

(cherry picked from commit 6f3aae25)
parent 18111b13

doc/man3/EVP_chacha20.pod

+9 −1
Original line number Diff line number Diff line
@@ -21,7 +21,15 @@ The ChaCha20 stream cipher for EVP. 


=item EVP_chacha20()



The ChaCha20 stream cipher. The key length is 256 bits, the IV is 96 bits long.

The ChaCha20 stream cipher. The key length is 256 bits, the IV is 128 bits long.

The first 32 bits consists of a counter in little-endian order followed by a 96

bit nonce. For example a nonce of:



000000000000000000000002



With an initial counter of 42 (2a in hex) would be expressed as:



2a000000000000000000000000000002



=item EVP_chacha20_poly1305()