certtool(1)
NAME
certtool - Manipulate certificates and keys.
SYNOPSIS
certtool [options]
DESCRIPTION
Generate X.509 certificates, certificate requests, and private keys.
OPTIONS
- Program control options
- -d, --debug LEVEL
Specify the debug level. Default is 1.
- -h, --help
Shows this help text
- -v, --version
Shows the program's version
- Getting information on X.509 certificates
- -i, --certificate-info
Print information on a certificate.
- -k, --key-info
Print information on a private key.
- -l, --crl-info
Print information on a CRL.
- --p12-info
Print information on a PKCS #12 structure.
- Getting information on Openpgp certificates
- --pgp--certificate-info
Print information on an OpenPGP certificate.
- --pgp--key-info
Print information on an OpenPGP private key.
- --pgp--ring-info
Print information on a keyring.
- Generating/verifying X.509 certificates/keys
- -c, --generate-certificate
Generate a signed certificate.
- -e, --verify-chain
Verify a PEM encoded certificate chain. The last certificate in the chain must be a self signed one.
- --generate-dh-params
Generate PKCS #3 encoded Diffie-Hellman parameters.
- --load-ca-certificate FILE
Certificate authority's certificate file to use.
- --load-ca-privkey FILE
Certificate authority's private key file to use.
- --load-certificate FILE
Certificate file to use.
- --load-privkey FILE
Private key file to use.
- --load-request FILE
Certificate request file to use.
- -p, --generate-privkey
Generate a private key.
- -q, --generate-request
Generate a PKCS #10 certificate request.
- -s, --generate-self-signed
Generate a self-signed certificate.
- -u, --update-certificate
Update a signed certificate.
- Controlling output
- -8, --pkcs8
Use PKCS #8 format for private keys.
- --dsa Generate a DSA key.
- --bits BITS
Specify the number of bits for key generation.
- --export-ciphers
Use weak encryption algorithms.
- --inraw
Use RAW/DER format for input certificates and private keys.
- --infile FILE
Input file.
- --outraw
Use RAW/DER format for output certificates and private keys.
- --outfile FILE
Output file.
- --password PASSWORD
Password to use.
- --to-p12
Generate a PKCS #12 structure.
- --template
Use a template file to read input. See the doc/certtool.cfg in the distribution, for an example.
- --fix-key
Some previous versions of certtool generated wrongly the optional parameters in a private key. This may affect programs that used them. To fix an old private key use --key-info in combination with this parameter.
- --v1 When generating a certificate use the X.509 version 1 format.
This does not add any extensions (such as indication for a CA) but some programs do need these.
EXAMPLES
- To create a private key, run:
- $ certtool --generate-privkey --outfile key.pem
- To create a certificate request (needed when the certificate is issued by another party), run:
$ certtool --generate-request --load-privkey key.pem \--outfile request.pem- To generate a certificate using the previous request, use the command:
$ certtool --generate-certificate --load-request request.pem \--outfile cert.pem --load-ca-certificate ca-cert.pem \
--load-ca-privkey ca-key.pem- To generate a certificate using the private key only, use the command:
$ certtool --generate-certificate --load-privkey key.pem \--outfile cert.pem --load-ca-certificate ca-cert.pem \
--load-ca-privkey ca-key.pem- To view the certificate information, use:
$ certtool --certificate-info --infile cert.pem- To generate a PKCS #12 structure using the previous key and certificate, use the command:
$ certtool --load-certificate cert.pem --load-privkey key.pem \--to-p12 --outder --outfile key.p12
AUTHOR
Nikos Mavroyanopoulos <nmav@gnutls.org> and others; see
/usr/share/doc/gnutls-bin/AUTHORS for a complete list.
- This manual page was written by Ivo Timmermans <ivo@debian.org>, for
the Debian GNU/Linux system (but may be used by others).