diff options
Diffstat (limited to 'doc/man3/HMAC.pod')
| -rw-r--r-- | doc/man3/HMAC.pod | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/man3/HMAC.pod b/doc/man3/HMAC.pod index 65386a7baa31..30c0e6bac392 100644 --- a/doc/man3/HMAC.pod +++ b/doc/man3/HMAC.pod @@ -63,7 +63,9 @@ If B<md> is NULL, the digest is placed in a static array. The size of the output is placed in B<md_len>, unless it is B<NULL>. Note: passing a NULL value for B<md> to use the static array is not thread safe. -B<evp_md> can be EVP_sha1(), EVP_ripemd160() etc. +B<evp_md> is a message digest such as EVP_sha1(), EVP_ripemd160() etc. HMAC does +not support variable output length digests such as EVP_shake128() and +EVP_shake256(). HMAC_CTX_new() creates a new HMAC_CTX in heap memory. |