Extract, Transform, and Load (ETL) is a process in data warehousing that involves
* extracting data from outside sources,
* transforming it to fit business needs (which can include quality levels), and ultimately
* loading it into the end target, i.e. the data warehouse.
The PDF format is one of the most common eBook types that you are likely to come across on the Internet. While OS X supports the reading of PDF files using the application Preview, and Apple’s portable devices now have
Extract the PKCS#7 object:
$ openssl smime -verify -in file.msg -noverify -pk7out > file.pk7
Dump the certificates in that file
openssl pkcs7 -print_certs -in file.pk7 > file.pem
Open the file in your favorite text editor and seperate out each certificate individually in to it's own file and import:
For each CA certificate that you want to trust:
smime_keys add_root file.pem
Note: You do not need to trust all intermediate CAs. You can simply trust the end-user certificate.
For the subject certificate that you want to add:
smime_keys add_cert file.pem