Introduction
- Here GroupMessage means that a message is sent to a group of recipients.
Prepare certificates
- Alice
openssl genrsa -out alicekey.pem
openssl req -new -key alicekey.pem -sujb "/[email protected]" -out alicecsr.pem
openssl x509 -req -in alicecsr.pem -days 999 -signkey alicekey.pem -out alicecert.pemBob
SkippedCat
Skipped
Sample Steps
Signing
openssl cms -sign -in msg.txt -signer alicecert.pem -inkey alicekey.pem -nodetach -text Encrypting
openssl cms -encrypt -des3 bobcert.pem catcert.pem Decrypting with Bob key
openssl cms -decrypt -recip bobcert.pem -inkey bobkey.pem Decrypting with Cat key
openssl cms -decrypt -recip catcert.pem -inkey catkey.pem Verifying with Alice certificate
openssl cms -verify -certfile alicecert.pem -CAfile alicecert.pemNote
