.\" -*- mode: troff; coding: utf-8 -*- .\" Automatically generated by Pod::Man v6.0.2 (Pod::Simple 3.45) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>. .ie n \{\ . ds C` "" . ds C' "" 'br\} .el\{\ . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is >0, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .\" .\" Avoid warning from groff about undefined register 'F'. .de IX .. .nr rF 0 .if \n(.g .if rF .nr rF 1 .if (\n(rF:(\n(.g==0)) \{\ . if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{\ . nr % 0 . nr F 2 . \} . \} .\} .rr rF .\" .\" Required to disable full justification in groff 1.23.0. .if n .ds AD l .\" ======================================================================== .\" .IX Title "swtpm_cert 8" .TH swtpm_cert 8 2026-03-26 swtpm "" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH NAME swtpm_cert \- Tool to create EK and platform certs for swtpm (1.2 & 2.0) .SH SYNOPSIS .IX Header "SYNOPSIS" \&\fBswtpm_cert [OPTIONS]\fR .SH DESCRIPTION .IX Header "DESCRIPTION" \&\fBswtpm_cert\fR is a local CA tool for creating X.509v3 certificates for the TPM\*(Aqs Endorsement Key. The reason for this specific tool is that it works without access to the Endorsement Key\*(Aqs 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. .PP The following options are supported: .IP "\fB\-\-type {ek|platform}\fR" 4 .IX Item "--type {ek|platform}" The type of certificate to create; by default an EK certificate is created. .IP "\fB\-\-pubkey " 4 .IX Item "--pubkey " The public key (EK) in PEM format. .IP "\fB\-\-modulus " 4 .IX Item "--modulus " The modulus of the public key as a string of hex digits. This option can be used in place of the \-\-pubkey option. .IP "\fB\-\-ecc\-x " 4 .IX Item "--ecc-x " The elliptic curve parameter x as string of hex digits. .IP "\fB\-\-ecc\-y " 4 .IX Item "--ecc-y " The elliptic curve parameter y as string of hex digits. .IP "\fB\-\-ecc\-curveid " 4 .IX Item "--ecc-curveid " The elliptic curve\*(Aqs id. secp256r1, secp384r1, and secp521r1 are supported. If this option is not given, secp256r1 is assumed. .IP "\fB\-\-exponent " 4 .IX Item "--exponent " The exponent of the public key. By default 0x10001 is assumed. .IP "\fB\-\-signkey " 4 .IX Item "--signkey " The key used for signing the certificate. The file must be in PEM format. .IP "\fB\-\-signkey\-password " 4 .IX Item "--signkey-password " Optional password for the signing key. .IP "\fB\-\-signkey\-pwd " 4 .IX Item "--signkey-pwd " This is an alternative option for passing the signing key password. The following formats are supported for \fIpwd\fR: .Sp .Vb 5 \& \- : direct password \& \- pass: : direct password \& \- file: : password in file \& \- fd: : read password from file descriptor \& \- env: : read password from env. variable .Ve .Sp All passwords read from files and file descriptors must be a maximum of 255 bytes (plus one byte for terminating NUL byte). .IP "\fB\-\-parentkey\-password " 4 .IX Item "--parentkey-password " Optional password for a parent key. In case a TPM key is used for signing this would be the password for the TPM\*(Aqs storage root key (SRK). .IP "\fB\-\-parentkey\-pwd " 4 .IX Item "--parentkey-pwd " This is an alternative option for passing the parentkey password. See the description above for supported \fIpwd\fR formats. .IP "\fB\-\-issuercert " 4 .IX Item "--issuercert " The X.509 certificate of this signer that takes on the role of a local CA. .IP "\fB\-\-out\-cert " 4 .IX Item "--out-cert " The name of the file to write the X.509v3 certificate into. The output will be in PEM format. .IP "\fB\-\-serial " 4 .IX Item "--serial " Optional 32bit serial number for the certificate. .IP "\fB\-\-days " 4 .IX Item "--days " The number of days the certificate is valid; by default it is valid for 365 days. .IP \fB\-\-pem\fR 4 .IX Item "--pem" Write the resulting certificate in PEM format; DER format is the default. .IP "\fB\-\-tpm\-manufacturer " 4 .IX Item "--tpm-manufacturer " The name of the TPM manufacturer. .IP "\fB\-\-tpm\-model " 4 .IX Item "--tpm-model " The TPM model (part number). .IP "\fB\-\-tpm\-version " 4 .IX Item "--tpm-version " The TPM\*(Aqs firmware version. .IP "\fB\-\-platform\-manufacturer " 4 .IX Item "--platform-manufacturer " The name of the platform manufacturer. .IP "\fB\-\-platform\-model " 4 .IX Item "--platform-model " The platform model. .IP "\fB\-\-platform\-version " 4 .IX Item "--platform-version " The platform\*(Aqs version. .IP "\fB\-\-subject " 4 .IX Item "--subject " Subject to for example provide the location of the TPM in the format of C=,ST=,L=. Note that the location must no contain any spaces. .IP \fB\-\-tpm2\fR 4 .IX Item "--tpm2" Issue TPM 2 compliant certificates. .IP \fB\-\-allow\-signing\fR 4 .IX Item "--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. .IP \fB\-\-decryption\fR 4 .IX Item "--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. .IP "\fB\-\-print\-capabilities\fR (since v0.3)" 4 .IX Item "--print-capabilities (since v0.3)" Print capabilities that were added to swtpm_cert after version 0.2. The output may contain the following: .Sp .Vb 8 \& { \& "type": "swtpm_cert", \& "features": [ \& "cmdarg\-signkey\-pwd", \& "cmdarg\-parentkey\-pwd" \& ], \& "version": "0.7.0" \& } .Ve .Sp The version field is available since 0.7. .Sp The meaning of the feature verbs is as follows: .RS 4 .IP \fBcmdarg\-signkey\-pwd\fR 4 .IX Item "cmdarg-signkey-pwd" The \fI\-\-signkey\-pwd\fR option is supported. .IP \fBcmdarg\-parentkey\-pwd\fR 4 .IX Item "cmdarg-parentkey-pwd" The \fI\-\-parentkey\-pwd\fR option is supported. .RE .RS 4 .RE .IP "\fB\-\-help, \-h\fR" 4 .IX Item "--help, -h" Display the help screen .SH "SEE ALSO" .IX Header "SEE ALSO" .SH "REPORTING BUGS" .IX Header "REPORTING BUGS" Report bugs to Stefan Berger