openssl genrsa -des3 -out server.key 2048
openssl req -new -key server.key -out server.csr
openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt

openssl x509 -noout -modulus -in <file>.crt | openssl md5
openssl rsa -noout -modulus -in <file>.key | openssl md5

Si les 2 commandes ne génèrent pas le meme md5 c'est que le le .key n'est pas celui qui à servi pour générer le .crt.

$ openssl x509 -hash -in ssl/server.crt -noout
deb1aaa8

$ openssl x509 -noout -issuer -subject -in google.crt -nameopt multiline
issuer=
    countryName               = US
    organizationName          = Google Inc
    commonName                = Google Internet Authority G2
subject=
    countryName               = US
    stateOrProvinceName       = California
    localityName              = Mountain View
    organizationName          = Google Inc
    commonName                = google.com

openssl verify ssl/server.crt

$ openssl verify -CAfile ssl/ca.crt ssl/server.crt
ssl/server.crt: OK

openssl req -noout -text -in keys/server.csr

openssl x509 -noout -text -in <file>.crt

openssl x509 -noout -text -in nnn -inform DER

openssl x509 -fingerprint -noout -in client.crt

openssl x509 -in input.crt -inform PEM –out output.crt -outform DER

openssl rsa -in input.key -inform PEM -out output.key -outform DER

openssl x509 -in input.crt -inform DER -out output.crt -outform PEM

openssl rsa -in input.key -inform DER -out output.key -outform PEM

openssl s_client -showcerts -connect www.google.com:443
openssl s_client -port 443 -host www.google.com

openssl s_client -connect 127.0.0.1:9999

openssl smime -sign -in message -out signed-message \
	-signer /path/to/your/certificate.pem \
	-inkey  /path/to/your/secret-key.pem -text

openssl smime -encrypt -out encrypted-signed-message \
	-in signed-message /path/to/intended-operators/certificate.pem

openssl smime -decrypt -in encrypted-signed-message \
	-out received-msg \
	-recip /path/to/operators/certificate.pem \
	-inkey /path/to/operators/private-key.pem

$ tar -zcf - directory | openssl aes-128-cbc -salt -out directory.tar.gz.aes  # Encrypt
$ openssl aes-128-cbc -d -salt -in directory.tar.gz.aes | tar -xz -f -        # Decrypt

$ openssl aes-128-cbc -salt -in file -out file.aes
$ openssl aes-128-cbc -d -salt -in file.aes -out file

openssl smime -verify -text -CApath /global/globus/share/certificates \
	-in received-msg