[B<-secretkeyid id>]
[B<-econtent_type type>]
[B<-inkey file>]
+[B<-keyopt name:parameter>]
[B<-passin arg>]
[B<-rand file(s)>]
[B<cert.pem...>]
for signing and encryption this option can be used multiple times to
set customised parameters for the preceding key or certificate. It can
-currently be used to set RSA-PSS for signing or RSA-OAEP for encryption.
+currently be used to set RSA-PSS for signing, RSA-OAEP for encryption
+or to modify default parameters for ECDH.
=item B<-passin arg>
The B<-secretkey> option when used with B<-encrypt>.
+The use of PSS with B<-sign>.
+
+The use of OAEP or non-RSA keys with B<-encrypt>.
+
Additionally the B<-EncryptedData_create> and B<-data_create> type cannot
be processed by the older B<smime> command.
Create encrypted mail using RSA-OAEP:
- openssl cms -encrypt -in plain.txt -camellia128 -out mail.msg \
+ openssl cms -encrypt -in plain.txt -out mail.msg \
-recip cert.pem -keyopt rsa_padding_mode:oaep
+Use SHA256 KDF with an ECDH certificate:
+
+ openssl cms -encrypt -in plain.txt -out mail.msg \
+ -recip ecdhcert.pem -keyopt ecdh_kdf_md:sha256
+
=head1 BUGS
The MIME parser isn't very clever: it seems to handle most messages that I've
Support for RSA-OAEP and RSA-PSS was first added to OpenSSL 1.1.0.
+The use of non-RSA keys with B<-encrypt> and B<-decrypt> was first added
+to OpenSSL 1.1.0.
+
=cut