NAME

       minisign - A dead simple tool to sign files and verify signatures.

SYNOPSIS

       minisign -G [-p pubkey_file] [-s seckey_file] [-W]

       minisign -R [-s seckey_file] [-p pubkey_file]

       minisign -C [-s seckey_file] [-W]

       minisign -S [-H] [-x sig_file] [-s seckey_file] [-c untrusted_comment] [-t trusted_comment] -m file [file
       ...]

       minisign -V [-x sig_file] [-p pubkey_file | -P pubkey] [-o] [-q] -m file

DESCRIPTION

       Minisign is a dead simple tool to sign files and verify signatures.

       It  is  portable,  lightweight,  and  uses  the highly secure Ed25519 http://ed25519.cr.yp.to/ public-key
       signature system.

OPTIONS

       These options control the actions of minisign.

       -G     Generate a new key pair

       -C     Change/remove the password of a secret key

       -R     Recreate a public key file from a secret key file

       -S     Sign files

       -V     Verify that a signature is valid for a given file

       -H     Requires the input to be prehashed

       -l     Sign using the legacy format

       -m <file>
              File to sign/verify

       -o     Combined with -V, output the file content after verification

       -p <pubkey_file>
              Public key file (default: ./minisign.pub)

       -P <pubkey>
              Public key, as a base64 string

       -s <seckey_file>
              Secret key file (default: ~/.minisign/minisign.key)

       -W     Do not encrypt/decrypt the secret key with a password

       -x <sig_file>
              Signature file (default: <file>.minisig)

       -c <comment>
              Add a one-line untrusted comment

       -t <comment>
              Add a one-line trusted comment

       -q     Quiet mode, suppress output

       -Q     Pretty quiet mode, only print the trusted comment

       -f     Force. Combined with -G, overwrite a previous key pair

       -v     Display version number

EXAMPLES

       Creating a key pair

       minisign -G

       The public key is printed and put into the minisign.pub file. The secret key is encrypted and saved as  a
       file named ~/.minisign/minisign.key.

       Signing files

       $ minisign -Sm myfile.txt $ minisign -Sm myfile.txt myfile2.txt *.c

       Or to include a comment in the signature, that will be verified and displayed when verifying the file:

       $ minisign -Sm myfile.txt -t 'This comment will be signed as well'

       The  secret key is loaded from ${MINISIGN_CONFIG_DIR}/minisign.key, ~/.minisign/minisign.key, or its path
       can be explicitly set with the -s <path> command-line switch.

       Verifying a file

       $ minisign -Vm myfile.txt -P <pubkey>

       or

       $ minisign -Vm myfile.txt -p signature.pub

       This requires the signature myfile.txt.minisig to be present in the same directory.

       The public key can either reside in a file (./minisign.pub by default) or be directly  specified  on  the
       command line.

Notes

       Signature  files  include  an  untrusted  comment  line that can be freely modified, even after signature
       creation.

       They also include a second comment line, that cannot be modified without the secret key.

       Trusted comments can be used to add instructions or application-specific metadata  (intended  file  name,
       timestamps, resource identifiers, version numbers to prevent downgrade attacks).

AUTHOR

       Frank Denis (github [at] pureftpd [dot] org)

                                                  January 2023                                       MINISIGN(1)