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-rw-r--r--doc/internal/man3/ossl_cmp_msg_protect.pod6
1 files changed, 5 insertions, 1 deletions
diff --git a/doc/internal/man3/ossl_cmp_msg_protect.pod b/doc/internal/man3/ossl_cmp_msg_protect.pod
index ae77712807..04da21fd9f 100644
--- a/doc/internal/man3/ossl_cmp_msg_protect.pod
+++ b/doc/internal/man3/ossl_cmp_msg_protect.pod
@@ -25,7 +25,7 @@ using the credentials, library context, and property criteria in the I<ctx>.
ossl_cmp_msg_protect() (re-)protects the given message I<msg> using an algorithm
depending on the available context information given in the I<ctx>.
If there is a secretValue it selects PBMAC, else if there is a protection cert
-it selects Signature and uses L<ossl_cmp_msg_add_extraCerts(3)>.
+it selects Signature and uses ossl_cmp_msg_add_extraCerts (see below).
It also sets the protectionAlg field in the message header accordingly.
ossl_cmp_msg_add_extraCerts() adds elements to the extraCerts field in I<msg>.
@@ -40,6 +40,10 @@ of the chain, i.e, the trust anchor (unless it is part of extraCertsOut).
CMP is defined in RFC 4210 (and CRMF in RFC 4211).
+The I<ctx> parameter of ossl_cmp_msg_add_extraCerts()
+and thus also of ossl_cmp_msg_protect() cannot be made I<const>
+because I<ctx->chain> may get adapted to cache the chain of the CMP signer cert.
+
=head1 RETURN VALUES
ossl_cmp_calc_protection() returns the protection on success, else NULL.