* src/cms-parser.c (_ksba_cms_parse_enveloped_data_part_1): Decode at
the RecipientInfo level.
* src/cms.c (ksba_cms_get_issuer_serial): Adjust for this change.
Support KeyAgreeRecipientInfo.
(ksba_cms_get_enc_val): Ditto.
(dbg_print_sexp): New commented debug helper.
* src/keyinfo.c (enc_algo_table): Add and entry of ECDH.
(_ksba_parse_algorithm_identifier2): Make R_NREAD optional.
(cryptval_to_sexp): Add args to support ECDH.
(_ksba_sigval_to_sexp): Adjust for this.
(_ksba_encval_to_sexp): Ditto.
(_ksba_encval_kari_to_sexp): New.
* tests/t-cms-parser.c (one_file): Print the enc-val.
* tests/samples/ecdh-sample1.p7m: New sample.
* tests/samples/ecdh-sample1.p7m.asn: And a dump with some comments.