Commit f7a6d112 authored by Matt Caswell's avatar Matt Caswell
Browse files

Update ChaCha20-Poly1305 documentation 



Correctly describe the maximum IV length.

Reviewed-by: default avatarPaul Dale <paul.dale@oracle.com>
Reviewed-by: default avatarRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8406)

(cherry picked from commit 27d56312)
parent 9b10d1bf

doc/man3/EVP_EncryptInit.pod

+3 −1
Original line number Diff line number Diff line
@@ -436,7 +436,9 @@ The following I<ctrl>s are supported for the ChaCha20-Poly1305 AEAD algorithm. 


Sets the nonce length. This call can only be made before specifying the nonce.

If not called a default nonce length of 12 (i.e. 96 bits) is used. The maximum

nonce length is 16 (B<CHACHA_CTR_SIZE>, i.e. 128-bits).

nonce length is 12 bytes (i.e. 96-bits). If a nonce of less than 12 bytes is set

then the nonce is automatically padded with leading 0 bytes to make it 12 bytes

in length.



=item EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, taglen, tag)