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+.TH zpm-sign 8 2019-02-15 "ZPM 0.3"
+.SH NAME
+zpm-sign \- manage package signatures
+.SH SYNOPSIS
+.B zpm sign
+[
+.B -hrdsgev
+]
+[
+.BI -f " sigfile"
+]
+[
+.BI -o " outfile"
+]
+[
+.BI -S " sigstring"
+]
+[
+.BI -k " keystring"
+]
+[
+.BI -K " keyfile"
+]
+[
+.BI -p " passphrase"
+]
+[
+.BI -m " messagestring"
+]
+.RI [ file ]
+.SH DESCRIPTION
+\fBzpm-sign\fR
+manages signatures on zpm packages.  It can generate signing keys,
+sign files, and verify signatures.  The ed25519 algorithms are
+used exclusively, and all the signature code is taken from the
+ref10 implementation.  Signatures themselves are hex encoded
+representions of the signature metadata and the actual signature value.
+.PP
+Private keys are potentially encrypted with chacha20 before storing
+them on disk.
+.SH OPTIONS
+.B -r
+.TP
+.B \-g
+Generate a private key
+.TP
+.B \-e
+Extract a public key from a private key.
+.TP
+.B \-s
+Sign a file or message.  In addition to the message to be signed,
+signature metadata is signed.
+.TP
+.B \-v
+Verify a signature on a file or message.
+.TP
+.B \-h
+hexencode values
+.TP
+.B \-d
+Increase the debug level.  May be given more than once.
+.TP
+.B \-r
+Output the raw signature, rather than a full zpm certificate.
+This also just signs the data given, without any signature
+metadata.
+.TP
+.BI \-p passphrase
+Specify a passphrase to decrypt a private key.
+.TP
+.BI \-m message
+Specify a message to be signed or verified.  If not set with the -m option, the
+message is taken from file named with the first non-option argument.
+.TP
+.BI \-k path
+Take the private key for message signing from the path given.  This
+defaults to ~/.zpm/key.  If ~/.zpm/key is not found and the euid
+is root, /var/lib/zpm/key is tried.
+.TP
+.BI \-K key
+Take the private key from the command line argument.  This is not
+particularly secure and is primarily intended for testing.
+.TP
+.BI \-S sigstring
+Use sigstring as the signature to verify.
+.TP
+.BI \-m message
+Specify a message to be signed or verified.  If not set with the -m option, the
+message is taken from file named with the first non-option argument.
+.SH EXAMPLES
+.TP
+.B zpm sign
+lists all files in the local database
+.SH EXIT STATUS
+0 on success non zero on failure
+.SH FILES
+/var/lib/zpm/local.db
+.SH ENVIRONMENT
+ZPMDB
+.SH AUTHOR
+Nathan Wagner
+.SH SEE ALSO
+.BR zpm (8)