I would like to verify the sender and 'addressee' certificate information of an encrypted/signed file. So far, I came up with the following set of arguments to openssl:
openssl cms -inform DER -cmsout -print -recip my.crt -in cms_file
This returns the following information:
CMS_ContentInfo: contentType: pkcs7-envelopedData (1.2.840.113518.104.22.168) d.envelopedData: version: 2 originatorInfo: ... issuer: O=TheirCompany, CN=TheirCA ... subject: O=TheirCompany, CN=TheirEndpoint ... recipientInfos: ... issuer: O=TheirCompany, CN=TheirCA ...
So I've got most of the information I'm looking for, except the subject of the recipient. How do I extract this information?