If the -trustcacerts option has been specified, additional certificates are considered for the chain of trust, namely the certificates in a. If the -noprompt option is given, there is no interaction with the user. There is also a -J javaoption option that may appear for any subcommand. Verify contents of keystore using this command: keytool -list -v -keystore keystore. Viewing Keystore Entries This section covers listing the contents of a Java Keystore, such as viewing certificate information or exporting certificates.
However, it is not necessary to have all the subcomponents. See the Section for a detailed description. Clients that want to use the file will want to authenticate your signature. The following command demonstrates this: keytool -importkeystore -srckeystore key. In a large-scale networked environment it is impossible to guarantee that prior relationships between communicating entities have been established or that a trusted repository exists with all used public keys.
In addition, remember your Alias Name for your private key. If the alias does not exist in the keystore, keytool creates a trusted certificate entry with the specified alias and associates it with the imported certificate. If it appears, the specified javaoption string is passed through directly to the Java interpreter. Note that the keystore password provided here matches the keystore password used when creating this private keystore file JohnsPrivateKey. If no password is provided, and the private key password is different from the keystore password, the user is prompted for it. Argument Description -alias The name in the Java KeyStore the generated key should be identified by.
The -v option can appear for all commands except -help. Each certificate in the chain after the first thus authenticates the public key of the signer of the previous certificate in the chain. The generated key pair is inserted into a Java KeyStore file as a self signed key pair. Most situations require that you buy a trusted certificate, but there are many cases when you can generate and use a self signed certificate for free. If a destination alias is not provided with destalias, then srcalias is used as the destination alias. In this case, besides the options you see in the above example, you need to specify the alias you want to import. That is, the -keyalg and -sigalg options for various subcommands must be supported by a provider implementation.
Both of these passwords are very important, and you'll see how they are used in the next steps. You may occasionally wish to generate a new self-signed certificate. Modifying Keystore This section covers the modification of Java Keystore entries, such as deleting or renaming aliases. First, copy clone your key entry: keytool -keyclone -alias sMiller -dest sMillerNew This prompts for the store password and for the initial and destination private key passwords, since they arent provided at the command line. Here is an example keytool -genkeypair command.
This is specified by the following line in the security properties file: keystore. Note: it is not required that you execute a -printcert command prior to importing a certificate, since before adding a certificate to the list of trusted certificates in the keystore, the -importcert command prints out the certificate information and prompts you to verify it. Public keys are used to verify signatures. Generating Your Key Pair The first thing you need to do is create a keystore and generate the key pair. For example, you may want to use the same key pair under a different identity distinguished name. If keypass is not provided at the command line, and is different from the password used to protect the integrity of the keystore, the user is prompted for it. This certificate will be valid for 180 days, and is associated with the private key in a keystore entry referred to by the alias business.
On a related note, this happens a zillion times successfully every day in the real world, so my hand-waving isn't that far fetched. You import a certificate for two reasons: Tag Description 1. Only if the fingerprints are equal is it guaranteed that the certificate has not been replaced in transit with somebody else's for example, an attacker's certificate. The issuer of the certificate vouches for this, by signing the certificate. Validity Period Each certificate is valid only for a limited amount of time. These options may appear for all commands operating on a keystore: -storetype storetype This qualifier specifies the type of keystore to be instantiated. This way, even if one of them is compromised somehow, the other source of randomness should keep the keys secure.
When data is digitally signed, the signature can be verified to check the data integrity and authenticity. If the -noprompt option is given, however, there will be no interaction with the user. If the alias does already exist, then keytool outputs an error, since there is already a trusted certificate for that alias, and does not import the certificate. Thus, they must be managed somewhat analogously to user names and passwords. You then have the option of aborting the import operation. If it detects alias duplication, it will ask you for a new one, you can specify a new alias or simply allow keytool to overwrite the existing one.