doc: document that the "info" KDF param concatenates

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20724)

diff --git a/doc/man3/EVP_KDF.pod b/doc/man3/EVP_KDF.pod
index 3b4e2b79aa145803c55ae31d0f9dd621c36db996..3c8914bd263a05ba77ba38816cbeb636c5344c1d 100644 (file)
--- a/doc/man3/EVP_KDF.pod
+++ b/doc/man3/EVP_KDF.pod
@@ -227,6 +227,12 @@ Some KDF implementations require a key.
 For those KDF implementations that support it, this octet string parameter
 sets the key.
 
+=item "info" (B<OSSL_KDF_PARAM_INFO>) <octet string>
+
+This parameter sets the info, fixed info, other info or shared info value.
+You can specify this parameter multiple times, and each instance will
+be concatenated to form the final value.
+
 =item "maclen" (B<OSSL_KDF_PARAM_MAC_SIZE>) <unsigned integer>
 
 Used by implementations that use a MAC with a variable output size (KMAC).