Install libcrypt-smime-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libcrypt-smime-perl
Description:
S/MIME message signing, verification, encryption and decryption module
Crypt::SMIME provides a class for handling S/MIME messages. It can sign, verify, encrypt and decrypt messages. . Crypt::SMIME operates on email messages as simple strings, so there's no particular integration with other MAIL::* or MIME::* modules. Rather, it can co-operate with any module capable of accepting / outputting the entire message as a single string.
Homepage: https://metacpan.org/release/Crypt-SMIME
Version: 0.21-1build1
Section: universe/perl