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).
May 23rd 2005 certtool(1)