Openssl Generate Key Pair Without Passphrase

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4.5.4 Unattended key generation. The command -generate-key may be used along with the option -batch for unattended key generation. This is the most flexible way of generating keys, but it is also the most complex one. Consider using the quick key manipulation interface described in the previous subsection “The quick key manipulation. Sep 26, 2019 You can use a key without a passphrase, but this is not recommended. Click the Save private key button to save the private key. You must save the private key. You will need it to connect to your machine. Right-click in the text field labeled Public key for pasting into OpenSSH authorizedkeys file and choose Select All. Jan 18, 2016 Generate a 2048 bit length private key without passphrase. Generate a 2048 bit length private key without passphrase. Skip navigation. Generate Private Key with OpenSSL Csaba Kerekes. Apr 12, 2020 With openssl self signed certificate you can generate private key with and without passphrase. If you use any type of encryption while creating private key then you will have to provide passphrase every time you try to access private key. With the encrypted password file we can avoid entering the password when we create self signed certificate.

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4.5.4 Unattended key generation

The command --generate-key may be used along with the option--batch for unattended key generation. This is the mostflexible way of generating keys, but it is also the most complex one.Consider using the quick key manipulation interface described in theprevious subsection “The quick key manipulation interface”.

The parameters for the key are either read from stdin or given as afile on the command line. The format of the parameter file is asfollows:

  • Text only, line length is limited to about 1000 characters.
  • UTF-8 encoding must be used to specify non-ASCII characters.
  • Empty lines are ignored.
  • Leading and trailing white space is ignored.
  • A hash sign as the first non white space character indicates a comment line.
  • Control statements are indicated by a leading percent sign, the arguments are separated by white space from the keyword.
  • Parameters are specified by a keyword, followed by a colon. Arguments are separated by white space.
  • The first parameter must be ‘Key-Type’; control statements may be placed anywhere.
  • The order of the parameters does not matter except for ‘Key-Type’ which must be the first parameter. The parameters are only used for the generated keyblock (primary and subkeys); parameters from previous sets are not used. Some syntactically checks may be performed.
  • Key generation takes place when either the end of the parameter file is reached, the next ‘Key-Type’ parameter is encountered or at the control statement ‘%commit’ is encountered.

Control statements:

%echo text

Print text as diagnostic.

%dry-run

Suppress actual key generation (useful for syntax checking).

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%commit

Perform the key generation. Note that an implicit commit is done atthe next Key-Type parameter.

%pubring filename

Do not write the key to the default or commandline given keyring butto filename. This must be given before the first commit to takeplace, duplicate specification of the same filename is ignored, thelast filename before a commit is used. The filename is used until anew filename is used (at commit points) and all keys are written tothat file. If a new filename is given, this file is created (andoverwrites an existing one).

See the previous subsection “Ephemeral home directories” for a morerobust way to contain side-effects.

%secring filename

This option is a no-op for GnuPG 2.1 and later.

See the previous subsection “Ephemeral home directories”.

%ask-passphrase
%no-ask-passphrase

This option is a no-op for GnuPG 2.1 and later.

%no-protection

Using this option allows the creation of keys without any passphraseprotection. This option is mainly intended for regression tests.

%transient-key

If given the keys are created using a faster and a somewhat lesssecure random number generator. This option may be used for keyswhich are only used for a short time and do not require fullcryptographic strength. It takes only effect if used together withthe control statement ‘%no-protection’.

General Parameters:

Key-Type: algo

Starts a new parameter block by giving the type of the primarykey. The algorithm must be capable of signing. This is a requiredparameter. algo may either be an OpenPGP algorithm number or astring with the algorithm name. The special value ‘default’ maybe used for algo to create the default key type; in this case a‘Key-Usage’ shall not be given and ‘default’ also be usedfor ‘Subkey-Type’.

Key-Length: nbits

The requested length of the generated key in bits. The default isreturned by running the command ‘gpg --gpgconf-list’.

Key-Grip: hexstring

This is optional and used to generate a CSR or certificate for analready existing key. Key-Length will be ignored when given.

Key-Usage: usage-list

Space or comma delimited list of key usages. Allowed values are‘encrypt’, ‘sign’, and ‘auth’. This is used togenerate the key flags. Please make sure that the algorithm iscapable of this usage. Note that OpenPGP requires that all primarykeys are capable of certification, so no matter what usage is givenhere, the ‘cert’ flag will be on. If no ‘Key-Usage’ isspecified and the ‘Key-Type’ is not ‘default’, all allowedusages for that particular algorithm are used; if it is not given but‘default’ is used the usage will be ‘sign’.

Subkey-Type: algo

This generates a secondary key (subkey). Currently only one subkeycan be handled. See also ‘Key-Type’ above.

Subkey-Length: nbits

Length of the secondary key (subkey) in bits. The default is returnedby running the command ‘gpg --gpgconf-list’.

Subkey-Usage: usage-list

Key usage lists for a subkey; similar to ‘Key-Usage’.

Passphrase: string

If you want to specify a passphrase for the secret key, enter it here.Default is to use the Pinentry dialog to ask for a passphrase.

Name-Real: name
Name-Comment: comment
Passphrase
Name-Email: email

The three parts of a user name. Remember to use UTF-8 encoding here.If you don’t give any of them, no user ID is created.

Expire-Date: iso-date (number[d w m y])

Set the expiration date for the key (and the subkey). It may eitherbe entered in ISO date format (e.g. '20000815T145012') or as number ofdays, weeks, month or years after the creation date. The specialnotation 'seconds=N' is also allowed to specify a number of secondssince creation. Without a letter days are assumed. Note that thereis no check done on the overflow of the type used by OpenPGP fortimestamps. Thus you better make sure that the given value makesense. Although OpenPGP works with time intervals, GnuPG uses anabsolute value internally and thus the last year we can represent is2105.

Creation-Date: iso-date

Set the creation date of the key as stored in the key information andwhich is also part of the fingerprint calculation. Either a date like'1986-04-26' or a full timestamp like '19860426T042640' may be used.The time is considered to be UTC. The special notation 'seconds=N'may be used to directly specify a the number of seconds since Epoch(Unix time). If it is not given the current time is used.

Preferences: string

Set the cipher, hash, and compression preference values for this key.This expects the same type of string as the sub-command ‘setpref’in the --edit-key menu.

Revoker: algo:fpr [sensitive]

Add a designated revoker to the generated key. Algo is the public keyalgorithm of the designated revoker (i.e. RSA=1, DSA=17, etc.)fpr is the fingerprint of the designated revoker. The optional‘sensitive’ flag marks the designated revoker as sensitiveinformation. Only v4 keys may be designated revokers.

Keyserver: string

This is an optional parameter that specifies the preferred keyserverURL for the key.

Handle: string

This is an optional parameter only used with the status linesKEY_CREATED and KEY_NOT_CREATED. string may be up to 100characters and should not contain spaces. It is useful for batch keygeneration to associate a key parameter block with a status line.

Openssl Generate Key Pair Without Passphrase Code

Here is an example on how to create a key in an ephemeral home directory:

If you want to create a key with the default algorithms you would usethese parameters:

Openssl Generate Key Pair Without Passphrase Download

Previous: The quick key manipulation interface, Up: Unattended Usage of GPG [Contents][Index]