The openssl smime utility is useful for signing and encrypting S/MIME messages. S/MIME messages can be signed by multiple signers, be encrypted, decrypted, and verified. You can purchase an S/MIME email (user) certificate from almost any public CA (Certification Authority). For this exercise, we … [Read more...] about openssl smime
openssl encrypt a file
How to use openssl to encrypt a file with an asymmetric public key: Use the -rsautl option in openssl to encrypt a file using the RSA algorithm asymmetrically. When sharing a secret is not possible or less than ideal, asymmetric encryption is your best solution. First, if you do not already … [Read more...] about openssl encrypt a file
keytool printcert – How to print a certificate with Java keytool
What is Java keytool? The Java keytool is a command-line utility used to manage keystores in different formats containing keys and certificates. You can use the java keytool printcert command to print and view a certificate on a server or in a file. In many respects, the java keytool is a … [Read more...] about keytool printcert – How to print a certificate with Java keytool
How to create SSL certificate with Java keytool
What is Java keytool? The Java keytool is a command-line utility used to manage keystores in different formats containing keys and certificates. You can use the java keytool to create an SSL certificate via a response from a Certificate Signing Request (CSR). In many respects, the java keytool is … [Read more...] about How to create SSL certificate with Java keytool
How to generate secret key with java keytool
What is Java keytool? The Java keytool is a command-line utility used to manage keystores in different formats containing keys and certificates. You can use the java keytool to generate a secret key in a keystore. In many respects, the java keytool is a competing utility with openssl for … [Read more...] about How to generate secret key with java keytool
keytool export cert – Export a certificate with Java keytool
What is Java keytool? The Java keytool is a command-line utility used to manage keystores in different formats containing keys and certificates. You can use the java keytool to export a cert from a keystore. In many respects, the java keytool is a competing utility with openssl for keystore, key, … [Read more...] about keytool export cert – Export a certificate with Java keytool
keytool remove cert – command to remove a cert from keystore
What is Java keytool? The Java keytool is a command-line utility used to manage keystores in different formats containing keys and certificates. You can use the java keytool to remove a cert or key entry from a keystore. In many respects, it’s a competing utility with openssl for keystore, key, … [Read more...] about keytool remove cert – command to remove a cert from keystore
How to generate a keystore with java keytool
What is java keytool? The Java keytool is a command-line utility used to manage keystores in different formats containing keys and certificates, as well as generate a keystore. In many respects, it's a competing utility with openssl for keystore, key, and certificate management. What keytool … [Read more...] about How to generate a keystore with java keytool