NAME

       sigsum-key-sign - create Ed25519 signature

SYNOPSIS

       sigsum-key sign [--help] [-k key-file] [-n namespace] [-o output-file] < msg

DESCRIPTION

       Create an Ed25519 signature with a given namespace. The namespaces that are used in the Sigsum system are
       'sigsum.org/v1/tree-leaf'  (signed  checksums)  and  'sigsum.org/v1/submit-token'  (rate  limiting).  The
       default behavior is to not use any namespace.

       The message to sign is provided on stdin.

OPTIONS

       --help Show usage message and exit

       -k, --signing-key=key-file

              Private key in OpenSSH format; or a corresponding public key where the private  part  is  accessed
              using the SSH agent protocol (required)

       -n, --namespace=namespace

              Signature namespace to ensure domain separation

       -o, --output=output-file

              Signature in hex format

RETURN CODES

       A non-zero return code is used to indicate failure.

CONTACT

       Send  an email to the sigsum-general mailing list at sigsum-general@lists.sigsum.org.  You can also reach
       out in room #sigsum at OFTC.net and matrix.org.

REPORTING BUGS

       Use the issue tracker located at https://git.glasklar.is/sigsum/core/sigsum-go/-/issues.  To file  issues
       without a GitLab account, send an email to sigsum-core-sigsum-go-issues@incoming.glasklar.is and wait for
       a maintainer to make the issue public.

SEE ALSO

       sigsum-key-from-hex(1)  sigsum-key-from-vkey(1)  sigsum-key-generate(1) sigsum-key-sign(1) sigsum-key-to-
       hash(1)  sigsum-key-to-hex(1)  sigsum-key-to-vkey(1)   sigsum-key-verify(1)   sigsum-monitor(1)   sigsum-
       submit(1) sigsum-token(1) sigsum-tools(5) sigsum-verify(1)

sigsum-key sign 0.11.2-1                           March 2025                                 SIGSUM-KEY-SIGN(1)