Linux Certif

Toute la documentation sur la certification Linux LPI

certtool

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).