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remove passphrase from private key
openssl rsa -in asdf.key -out asdf.key
show technical infos about private key
openssl rsa -in asdf.key -text
show certificate details
openssl x509 -in asdf.cert -text
show certificate of a mail server (STARTTLS)
printf "QUIT" | openssl s_client -connect -starttls smtp | openssl x509 -text -noout
show remote certificate dates
printf "\r\n" | openssl s_client -connect 2>/dev/null | openssl x509 -dates -noout
generate CSR (length: 4096bit)
openssl req -newkey rsa:4096 -keyout asdf.key -out asdf.csr
create pkcs12 file from cert an private key

(ex. for Thunderbird S/MIME with StartSSL Cert)

openssl pkcs12 -export -out -inkey -in -certfile 1_Intermediate.crt
apps/openssl.txt · Last modified: 2023-01-09 23:55 by Manuel Frei