kmac: update the documention for the customisation string maximum length

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/14810)

diff --git a/doc/man7/EVP_MAC-KMAC.pod b/doc/man7/EVP_MAC-KMAC.pod
index 6b02e94ef8f7ba0ca91e19d7802d8515b8d1fb60..85986d5449fa7b64e4de293a26c0f15d7f2f44fd 100644 (file)
--- a/doc/man7/EVP_MAC-KMAC.pod
+++ b/doc/man7/EVP_MAC-KMAC.pod
@@ -42,7 +42,7 @@ Setting this parameter is identical to passing a I<key> to L<EVP_MAC_init(3)>.
 =item "custom" (B<OSSL_MAC_PARAM_CUSTOM>) <octet string>
 
 Sets the custom value.
-It is an optional value of at most 127 bytes, and is empty by default.
+It is an optional value of at most 256 bytes, and is empty by default.
 
 =item "size" (B<OSSL_MAC_PARAM_SIZE>) <unsigned integer>