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doc: note that out ChaCha20 isn't standard compliant.

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Fixes #21095

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/21098)
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Pauli 2023-06-01 09:51:46 +10:00
parent 80935bf5ad
commit c69756e7a0
1 changed files with 5 additions and 2 deletions
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7
doc/man3/EVP_chacha20.pod
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@ -22,10 +22,10 @@ The ChaCha20 stream cipher for EVP.
=item EVP_chacha20()
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
The first 64 bits consists of a counter in little-endian order followed by a 64
bit nonce. For example a nonce of:
000000000000000000000002
0000000000000002
With an initial counter of 42 (2a in hex) would be expressed as:
@ -47,6 +47,9 @@ calling these functions multiple times and should consider using
L<EVP_CIPHER_fetch(3)> instead.
See L<crypto(7)/Performance> for further information.
L<RFC 7539|https://www.rfc-editor.org/rfc/rfc7539.html#section-2.4>
uses a 32 bit counter and a 96 bit nonce for the IV.
=head1 RETURN VALUES
These functions return an B<EVP_CIPHER> structure that contains the