signify - sign and verify files
What is signify
- CentOS 5.6
- FreeBSD 10.0
- OS X 10.9
If you confirm another platform or add more platforms, pull requests are welcome.
autoreconf ./configure make make install
see LICENSE file; this is ISC/BSD License with the advertising term
SYNOPSIS signify -C [-q] -p pubkey -x sigfile [file ...] signify -G [-n] [-c comment] -p pubkey -s seckey signify -I [-p pubkey] [-s seckey] [-x sigfile] signify -S [-e] [-x sigfile] -s seckey -m message signify -V [-eq] [-x sigfile] -p pubkey -m message DESCRIPTION The signify utility creates and verifies cryptographic signatures. A signature verifies the integrity of a message. The mode of operation is selected with the following options: -C Verify a signed checksum list, and then verify the checksum for each file. If no files are specified, all of them are checked. sigfile should be the signed output of sha256(1). -G Generate a new key pair. -I Inspect the specified keys or signature and print their fin- gerprint. -S Sign the specified message file and create a signature. -V Verify the message and signature match. The other options are as follows: -c comment Specify the comment to be added during key generation. -e When signing, embed the message after the signature. When verifying, extract the message from the signature. (This requires that the signature was created using -e and cre- ates a new message file as output.) -m message When signing, the file containing the message to sign. When verifying, the file containing the message to verify. When verifying with -e, the file to create. -n Do not ask for a passphrase during key generation. Other- wise, signify will prompt the user for a passphrase to pro- tect the secret key. -p pubkey Public key produced by -G, and used by -V to check a signa- ture. -q Quiet mode. Suppress informational output. -s seckey Secret (private) key produced by -G, and used by -S to sign a message. -x sigfile The signature file to create or verify. The default is message.sig. The key and signature files created by signify have the same format. The first line of the file is a free form text comment that may be edited, so long as it does not exceed a single line. The second line of the file is the actual key or signature base64 encoded. EXIT STATUS The signify utility exits 0 on success, and >0 if an error occurs. It may fail because of one of the following reasons: o Some necessary files do not exist. o Entered passphrase is incorrect. o The message file was corrupted and its signature does not match. o The message file is too large. EXAMPLES Create a new key pair: $ signify -G -p newkey.pub -s newkey.sec Sign a file, specifying a signature name: $ signify -S -s key.sec -m message.txt -x msg.sig Verify a signature, using the default signature name: $ signify -V -p key.pub -m generalsorders.txt Verify a release directory containing SHA256.sig and a full set of release files: $ signify -C -p /etc/signify/openbsd-55-base.pub -x SHA256.sig Verify a bsd.rd before an upgrade: $ signify -C -p /etc/signify/openbsd-55-base.pub -x SHA256.sig bsd.rd SEE ALSO fw_update(1), pkg_add(1), sha256(1) HISTORY The signify command first appeared in OpenBSD 5.5.