Generate Csr With Private Key Using Keytool
OpenSSL Commands and SSL Keytool List
OpenSSL is an open-source implementation of SSL/TLS protocols and is considered to be one of the most versatile SSL tools. It’s a library written in C programming language that implements the basic cryptographic functions. OpenSSL has different versions for most Unix-like operating systems, which include Mac OC X, Linux, and Microsoft Windows etc.
Open SSL is normally used to generate a Certificate Signing Request (CSR) and private key for different platforms. However, it also has several different functions, which can be listed as follows. It is used to:
- Just fill in the details, click Generate, and paste your customized keytool command into your terminal. If you prefer to roll your own keytool commands to generate your CSR, just follow our old instructions below: Create a New Keystore. You will be using the keytool command to create your new key-CSR.
- Jul 08, 2019 In order to generate the CSR code on Tomcat, you can use keytool commands. First, you need to create a keystore that will contain the private key. Open up a command line interface and run the following command: keytool -genkey -keysize 2048 -keyalg RSA -alias tomcat -keystore yourkeystore.jks. You are free to use any custom alias and a keystore name.
- Oct 03, 2019 Once the keystore and Private key are generated it’s time to generate the CSR itself. To generate the CSR you need to run the command below using the keystore with the Private Key you established in the step above: keytool -certreq -alias tomcat -file your.csr -keystore yourkeystore.jks The CSR generated is in the file your.csr.
- View details about a CSR or a certificate
- Compare MD5 hash of a certificate and private key to ensure they match
- Verify proper installation of the certificate on a website
- Convert the certificate format
Because keytool is a multipurpose tool for managing keys and certificates, you may find it easier to understand the generating of a public-private key pair by looking first at a less complex tool available on Unix-like platforms, named ssh-keygen. (This is for illustration purposes only. I would like to export my private key from a Java Keytool keystore, so I can use it with openssl. How can I do that?
Most of the functions mentioned below can also be performed without involving OpenSSL by using these convenient SSL tools. Here, we have put together few of the most common OpenSSL commands.
General OpenSSL Commands
These are the set of commands that allow the users to generate CSRs, Certificates, Private Keys and many other miscellaneous tasks. Here, we have listed few such commands:
(1) Generate a Certificate Signing Request (CSR) and new private key
(2) Generate a self-signed certificate
(3) Create CSR based on an existing private key
(4) Create CSR based on an existing certificate
(5) Passphrase removal from a private key
SSL Check Commands
These commands are very helpful if the user wants to check the information within an SSL certificate, a Private Key, and CSR. Few online tools can also help you check CSRs and check SSL certificates.
(1) Certificate Signing Request (CSR)
(2) Private Key
(3) SSL Certificate
Oct 02, 2015 (Optional) Specifies that the RSA key pair can be exported to another Cisco device, such as a router. Modulus modulus-size (Optional) Specifies the IP size of the key modulus.By default, the modulus of a certification authority (CA) key is 1024 bits. The recommended modulus for a CA key is 2048 bits. I did a little research and found out that if I removed the rsa key by using this command ' crypto key zeroize rsa' and then added the 'crypto key generate rsa generate-keys modulus 1024, then that would work. Any thoughts? No service pad. No service password-encryption. Hostname Sales-SW-ACC2. Ip domain name my.company.come. Feb 12, 2018 When running the following commands to generate my keys: Router(config)#crypto key generate rsa I am getting the following output: How many bits in the modulus 512: 1024% Generating 1024 bit RSA keys, keys will be non-exportable. Crypto key generate rsa modulus 1024 error.
(4) PKCS#12 File (.pfx or .p12)
Convert Commands
As per the title, these commands help convert the certificates and keys into different formats to impart them the compatibility with specific servers types. For example, a PEM file, compatible with Apache server, can be converted to PFX (PKCS#12), after which it would be possible for it to work with Tomcat or IIS. However, you can also use the SSL Converter to change the format, without having to involve OpenSSL.
(1) Convert DER Files (.crt, .cer, .der) to PEM
(2) Convert PEM to DER
(3) Convert PKCS #12 File (.pfx, .p12) Containing a Private Key and Certificate to PEM
To output only the private key, users can add –nocerts or –nokeys to output only the certificates.
(4) Convert PEM Certificate (File and a Private Key) to PKCS # 12 (.pfx #12)
Debugging Using OpenSSL Commands
If there are error messages popping up about your private key not matching the certificate or that the newly-installed certificate is not trusted, you can rely on one of the comments mentioned below. You can also use the SSL certificate checker tool for verifying the correct installation of an SSL certificate.
(1) Check SSL Connection (All certificates, including Intermediates, are to be displayed)
Here, all the certificates should be displayed, including the Intermediates as well.
Generate Key And Csr
(2) Check MD5 Hash of Public Key
This is to ensure that the public key matches with the CSR or the private key.
SSL Keytool List
Java Keytool is a key and certificate management utility that allows the users to cache the certificate and manage their own private or public key pairs and certificates. Java Keytool stores all the keys and certificates in a ‘Keystore’, which is, by default, implemented as a file. It contains private keys and certificates that are essential for establishing the reliability of the primary certificate and completing a chain of trust.
Every certificate in Java Keystore has a unique pseudonym/alias. For creating a ‘Java Keystore’, you need to first create the .jks file containing only the private key in the beginning. After that, you need to generate a Certificate Signing Request (CSR) and generate a certificate from it. After this, import the certificate to the Keystore including any root certificates.
The ‘Java Keytool’ basically contains several other functions that help the users export a certificate or to view the certificate details or the list of certificates in Keystore.
Here are few important Java Keytool commands:
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For Creating and Importing
These Keytool commands allow users to create a new Java Keytool keysKeystore, generate a Certificate Signing Request (CSR) and import certificates. Before you import the primary certificate for your domain, you need to first import any root or intermediate certificates.
(1) Import a root or intermediate CA certificate to an existing Java keystore
(2) Import a signed primary certificate to an existing Java keystore
(3) Generate a keystore and self-signed certificate
(4) Generate Key Pair & Java Keystore
(5) Generate CSR for existing Java Keystore
Openssl Generate Key From Csr
For Checking
Java Keytool Csr
Users can check the information within a certificate or Java keystore by using the following commands:
(1) Check an individual certificate
(2) Check certificates in Java keystore
(3) Check specific keystore entry using an alias
Other Java Keytool Commands
(1) Delete a certificate from Java Keystore keystore
(2) Change the password in Java keystore / Change a Java keystore password
(3) Export certificate from Java keystore
Keytool Generate Certificate
(4) List the trusted CA Certificate
(5) Import new CA into Trusted Certs
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