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swtpm_cert(8)							 swtpm_cert(8)

NAME
       swtpm_cert - Tool to create EK and platform certs for swtpm (1.2	& 2.0)

SYNOPSIS
       swtpm_cert [OPTIONS]

DESCRIPTION
       swtpm_cert is a local CA	tool for creating X.509v3 certificates for the
       TPM's Endorsement Key. The reason for this specific tool	is that	it
       works  without access to	the Endorsement	Key's private key. Typically
       tools require either a self-signed certificate request or access	to the
       private key to issue a certificate.  This tool works with only the
       public key part.

       The following options are supported:

       --type {ek|platform}
	   The type of certificate to create; by default an EK certificate is
	   created.

       --pubkey	<filename>
	   The public key (EK) in PEM format.

       --modulus <hex digits>
	   The modulus of the public key as a string of	hex digits. This
	   option can be used in place of the --pubkey option.

       --ecc-x <hex digits>
	   The elliptic	curve parameter	x as string of hex digits.

       --ecc-y <hex digits>
	   The elliptic	curve parameter	y as string of hex digits.

       --ecc-curveid <curve id>
	   The elliptic	curve's	id. secp256r1, secp384r1, and secp521r1	are
	   supported.  If this option is not given, secp256r1 is assumed.

       --exponent <exponent>
	   The exponent	of the public key. By default 0x10001 is assumed.

       --signkey <filename>
	   The key used	for signing the	certificate. The file must be in PEM
	   format.

       --signkey-password <password>
	   Optional password for the signing key.

       --signkey-pwd <pwd>
	   This	is an alternative option for passing the signing key password.
	   The following formats are supported for pwd:

	     - <password>		    : direct password
	     - pass:<password>		    : direct password
	     - file:<filename>		    : password in file
	     - fd:<file	descriptor>	    : read password from file descriptor
	     - env:<environment	variable>   : read password from env. variable

	   All passwords read from files and file descriptors must be a
	   maximum of 255 bytes	(plus one byte for terminating NUL byte).

       --parentkey-password <password>
	   Optional password for a parent key. In case a TPM key is used for
	   signing this	would be the password for the TPM's storage root key
	   (SRK).

       --parentkey-pwd <pwd>
	   This	is an alternative option for passing the parentkey password.
	   See the description above for supported pwd formats.

       --issuercert <filename>
	   The X.509 certificate of this signer	that takes on the role of a
	   local CA.

       --out-cert <filename>
	   The name of the file	to write the X.509v3 certificate into. The
	   output will be in PEM format.

       --serial	<serial	number>
	   Optional 32bit serial number	for the	certificate.

       --days <number>
	   The number of days the certificate is valid;	by default it is valid
	   for 365 days.

       --pem
	   Write the resulting certificate in PEM format; DER format is	the
	   default.

       --tpm-manufacturer <name>
	   The name of the TPM manufacturer.

       --tpm-model <model>
	   The TPM model (part number).

       --tpm-version <version>
	   The TPM's firmware version.

       --platform-manufacturer <name>
	   The name of the platform manufacturer.

       --platform-model	<model>
	   The platform	model.

       --platform-version <version>
	   The platform's version.

       --subject <subject>
	   Subject to for example provide the location of the TPM in the
	   format of C=<country>,ST=<state>,L=<location>.  Note	that the
	   location must no contain any	spaces.

       --tpm2
	   Issue TPM 2 compliant certificates.

       --allow-signing
	   Create an EK	that can also be used for signing. Without this
	   option, the EK can only be used for key encipherment. This option
	   requires --tpm2.

       --decryption
	   If --allow-signing is passed	and the	EK should also be usable for
	   key encipherment, this option must be passed. Otherwise key
	   encipherment	is the default.	This option requires --tpm2.

       --print-capabilities (since v0.3)
	   Print capabilities that were	added to swtpm_cert after version 0.2.
	   The output may contain the following:

	       {
		 "type": "swtpm_cert",
		 "features": [
		   "cmdarg-signkey-pwd",
		   "cmdarg-parentkey-pwd"
		 ],
		 "version": "0.7.0"
	       }

	   The version field is	available since	0.7.

	   The meaning of the feature verbs is as follows:

	   cmdarg-signkey-pwd
	       The --signkey-pwd option	is supported.

	   cmdarg-parentkey-pwd
	       The --parentkey-pwd option is supported.

       --help, -h
	   Display the help screen

SEE ALSO
REPORTING BUGS
       Report bugs to Stefan Berger <stefanb@linux.vnet.ibm.com>

swtpm				  2025-04-30			 swtpm_cert(8)

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