Commands tagged certificate (9)
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When you don't have c_rehash handy. Really simple - if you have a .pem file that doesn't really contain a x509 cert (let's say, newreq.pem), it will create a link, simply called '.0', pointing to that file.
4for file in *.pem; do ln -s $file `openssl x509 -hash -noout -in $file`.0; done -
4openssl s_client -showcerts -connect google.com:443 </dev/null 2>/dev/null|openssl x509 -outform PEM > /tmp/google.com.cer
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Handy if you want to quickly generate a self-signed certificate. Also can be used in your automated scripts for generating quick-use certificates. Show Sample Output
2openssl req -new -newkey rsa:4096 -days 3650 -nodes -x509 -subj "/C=<Country Code>/ST=<State>/L=<City>/O=<Organization>/CN=<Common Name>" -keyout certificate.key -out certificate.crt -
This will create, in the current directory, a file called 'pk.pem' containing an unencrypted 2048-bit RSA private key and a file called 'cert.pem' containing a certificate signed by 'pk.pem'. The private key file will have mode 600. !!ATTENTION!! ==> this command will overwrite both files if present.
1touch pk.pem && chmod 600 pk.pem && openssl genrsa -out pk.pem 2048 && openssl req -new -batch -key pk.pem | openssl x509 -req -days 365 -signkey pk.pem -out cert.pem -
Stores the certificate expiration date on the variable A Show Sample Output
1echo | openssl s_client -connect www.batatinha.com.br:443 2>/dev/null | openssl x509 -noout -dates | tail -1 | tr -s " " |cut -d "=" -f2 | cut -d " " -f1,2,4 -
Based on http://stackoverflow.com/questions/13127352/checking-alternative-names-for-a-san-ssl-cert Replace "facebook.com" with the desired hostname. Show Sample Output
1echo "quit" | openssl s_client -connect facebook.com:443 | openssl x509 -noout -text | grep "DNS:" | perl -pe "s/(, )?DNS:/\n/g" -
CSR.csr MUST be exists before
1openssl req -out CSR.csr -key privateKey.key -new -
1openssl x509 -in cert.pem -fingerprint -noout
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0openssl pkcs12 -export -in /dir/CERTIFICATE.pem -inkey /dir/KEY.pem -certfile /dir/CA-cert.pem -name "certName" -out /dir/certName.p12
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