. ds ue
. ds *b \fIbeta\fP
.\}
+.de VS
+.sp 1
+.RS
+.nf
+.ft B
+..
+.de VE
+.ft R
+.fi
+.RE
+.sp 1
+..
.TH key 1 "5 June 1999" "Straylight/Edgeware" "Catacomb cryptographic library"
.SH NAME
key \- simple key management system
.I command
is one of:
.PP
+.B help
+.RI [ command ...]
+.br
+.B show
+.RI [ item ...]
+.br
.B add
-.RB [ \-lqrLS ]
+.RB [ \-lqrLKS ]
.RB [ \-a
.IR alg ]
.RB [ \-b | \-B
.IR tag ]
.br
\h'8n'
+.RB [ \-A
+.IR seed-alg ]
+.RB [ \-s
+.IR seed ]
+.RB [ \-n
+.IR bits ]
+.br
+\h'8n'
.RB [ \-e
.IR expire ]
.RB [ \-t
.I tag
.IR attr ...
.br
+.B getattr
+.I tag
+.I attr
+.br
.B lock
.I qtag
.br
.B fingerprint
.RB [ \-f
.IR filter ]
+.RB [ \-a
+.IR hash ]
.RI [ tag ...]
.br
+.B verify
+.RB [ \-f
+.IR filter ]
+.RB [ \-a
+.IR hash ]
+.I tag
+.I fingerprint
+.br
.B tidy
.br
.B extract
.I "global options"
may be given. The following global options are supported:
.TP
-.BR "\-h, \-\-help " [ \fIcommand ]
+.BR "\-h, \-\-help " [ \fIcommand ...]
Writes a brief summary of
.BR key 's
various options to standard output, and
-returns a successful exit status. With a command name, gives help on
-that command.
+returns a successful exit status. With command names, gives help on
+those commands.
.TP
.B "\-v, \-\-version"
Writes the program's version number to standard output, and returns a
attributes may have meaning for particular applications or key types;
others may be assigned global meanings in future.
.SH "COMMAND REFERENCE"
+.SS help
+The
+.B help
+command behaves exactly as the
+.B \-\-help
+option. With no arguments, it shows an overview of
+.BR key 's
+options; with arguments, it describes the named subcommands.
+.SS show
+The
+.B show
+command prints various lists of tokens understood by
+.BR key .
+With no arguments, it prints all of the lists; with arguments, it prints
+just the named lists, in order. The recognized lists can be enumerated
+using the
+.VS
+key show list
+.VE
+command. The lists are as follows.
+.TP
+.B list
+The lists which can be enumerated by the
+.B show
+command.
+.TP
+.B hash
+The hash functions which can be used with the
+.B fingerprint
+and
+.B verify
+commands.
+.TP
+.B ec
+The built-in elliptic curves which can be used with the
+.B add \-a ec
+command.
+.TP
+.B dh
+The built-in Diffie-Hellman groups which can be used with the
+.B add \-a dh
+command.
+.TP
+.B keygen
+The key-generation algorithms which are acceptable to the
+.B \-a
+option of the
+.B add
+command.
+.TP
+.B seed
+The pseudorandom generators which are acceptable to the
+.B \-s
+option of the
+.B add
+command.
.SS add
The
.B add
.BI "\-a, \-\-algorithm " alg
Selects a key generation algorithm. The default algorithm is
.BR binary ;
-the different algorithms are described below.
+the different algorithms are described below. The command
+.B key show keygen
+lists the recognized key-generation algorithms.
.TP
.BI "\-b, \-\-bits " bits
The length of the key to generate, in bits. The default, if this option
.TP
.BI "\-p, \-\-parameters " tag
Selects a key containing parameter values to copy. Not all
-key-generation algorithms allow the use of shared parameters.
+key-generation algorithms allow the use of shared parameters. A new key
+also inherits attributes from its parameter key.
+.TP
+.BI "\-A, \-\-seedalg " seed-alg
+Use the deterministic random number generator algorithm
+.I seed-alg
+to generate the key. Use
+.I before
+the
+.B \-s
+or
+.B \-n
+options; without one of these,
+.B \-A
+has no effect. The default algorithm is
+.BR rmd160-mgf .
+The command
+.B key show seed
+shows a list of recognized seeding algorithms. The seeding algorithm
+used to generate a key is recorded as the key's
+.B seedalg
+attribute.
+.TP
+.BI "\-s, \-\-seed " seed
+Generate the key deterministically using the given
+.IR seed ,
+which should be a Base64-encoded binary string. This is mainly useful
+for parameters keys (types
+.BR dsa-param
+and
+.BR dh-param ),
+to demonstrate that a set of parameters has been generated in an honest
+fashion. The
+.B dsarand
+generation algorithm can be used to generate
+.B dsa-param
+keys as required by FIPS186. The requested seed is recorded,
+Base64-encoded, as the new key's
+.B seed
+attribute.
+.TP
+.BI "\-n, \-\-newseed " bits
+Generate a new seed, with the given length in
+.IR bits .
+The generated seed is recorded, Base64-encoded, as the new key's
+.B seed
+attribute.
.TP
.BI "\-e, \-\-expire " expire
The expiry date for the generated key. This may be the string
Suppresses the progress indication which is usually generated while
time-consuming key generation tasks are being performed.
.TP
-.BI "\-L, --lim-lee"
+.BI "\-L, \-\-lim-lee"
When generating Diffie-Hellman parameters, generate a Lim-Lee prime
rather than a random (or safe) prime. See the details on Diffie-Hellman
key generation below.
.TP
-.BI "\-S, --subgroup"
+.BI "\-K, \-\-kcdsa"
+When generating Diffie-Hellman parameters, generate a KCDSA-style
+Lim-Lee prime rather than a random (or safe) prime. See the details on
+Diffie-Hellman key generation below.
+.TP
+.BI "\-S, \-\-subgroup"
When generating Diffie-Hellman parameters with a Lim-Lee prime, choose a
generator of a prime-order subgroup rather than a subgroup of order
.RI ( p "- 1)/2."
.IR p ;
the default size is 1024 bits.
.IP
-If no
+If no
.I q
size is selected using the
.B \-B
-option and the Lim-Lee prime option is disabled, then
+option and the Lim-Lee prime options are disabled, then
.I p
is chosen to be a `safe' prime (i.e.,
.IR p \ =\ 2 q \ +\ 1,
.IP
If the
.B \-L
-option was given Lim-Lee primes are selected: the parameters are chosen
+option was given, Lim-Lee primes are selected: the parameters are chosen
such that
.IR p \ =\ 2\ q \*(us0\*(ue\ q \*(us1\*(ue\ q \*(us2\*(ue\ ...\ +\ 1,
where the
option (or 256 bits, if no setting was given).
.IP
If the
+.B \-K
+option was given, KCDSA-style Lim-Lee primes are selected: the
+parameters are chosen such that
+.IR p \ =\ 2\ q\ v \ +\ 1,
+where
+.IR p,
+.I q
+and
+.I v
+are primes.
+.IP
+If the
.B \-S
-option was given, the generator
+or
+.B \-K
+options were given, the generator
.I g
is chosen to generate the subgroup of order
.IR q \*(us0\*(ue;
option can be given, in which case the parameters are taken directly
from the provided group specification, which may either be the the name
of one of the built-in groups (say
-.B "key add \-a dh\-param \-C list 42"
+.B "key show dh"
for a list) or a triple
.RI ( p ,\ q ,\ g ).
separated by commas. No random generation is done in this case: the
can be given explicitly (in which case
.RB ` \-b '
is ignored). It can either be the name of a built-in curve (say
-.B "key add \-a ec\-param \-C list 42"
+.B "key show ec"
for a list of curve names) or a full specification. The curve is
checked for correctness and security according to the SEC1
specification: failed checks cause a warning to be issued to standard
then an optional
.RB ` , '
and the representation of the normal element \*(*b; an optional
-.RB ` / ';
+.RB ` ; ';
a
.IR "curve type" ,
which is one of
the two field-element parameters
.I a
and
-.IR b
+.IR b
which define the elliptic curve
.IR E ,
separated by an optional
.RB ` , ';
an optional
-.RB ` / ';
-the
+.RB ` ; ';
+the
.IR x -
and
.IR y -coordinates
.RB ` : ';
the order
.I r
-of the group generated by
+of the group generated by
.IR G ;
an optional
.RB ` * ';
-and the
+and the
.I cofactor
.I h
=
the keyring file format is capable of representing an attribute with an
empty value as distinct from a nonexistant attribute, this interface
does not allow empty attributes to be set.
+.SS "getattr"
+Fetches a single attribute of a key. The key whose attribute is to be
+read is given by its
+.IR tag .
+The attribute's value is written to standard output followed by a
+newline. If the key or attribute is absent, a message is written to
+standard error and the program exits nonzero.
.SS "comment"
Sets, deletes or changes the comment attached to a key. The first
argument is a key tag or keyid which names the key to be modified; the
when you do this!
.SS "fingerprint"
Reports a fingerprint (secure hash) on components of requested keys.
-The following option is supported:
+The following options are supported:
.TP
.BI "\-f, \-\-filter " filter
Specifies a filter. Only keys and key components which match the filter
are fingerprinted. The default is to only fingerprint nonsecret
components.
+.TP
+.BI "\-a, \-\-algorithm " hash
+Names the hashing algorithm. Run
+.B key show hash
+for a list of hashing algorithms. The default is
+.BR rmd160 .
.PP
The keys to be fingerprinted are named by their tags or keyids given as
command line arguments. If no key tags are given, all keys which match
-the filter are fingerprinted.
+the filter are fingerprinted. See
+.BR keyring (5)
+for a description of how key fingerprints are computed.
+.SS "verify"
+Check a key's fingerprint against a reference copy. The following
+options are supported:
+.TP
+.BI "\-f, \-\-filter " filter
+Specifies a filter. Only key components which match the filter are
+hashed. The default is to only fingerprint nonsecret components. An
+error is reported if no part of the key matches.
+.TP
+.BI "\-a, \-\-algorithm " hash
+Names the hashing algorithm. Run
+.B key show hash
+for a list of hashing algorithms. The default is
+.BR rmd160 .
+.PP
+The reference fingerprint is given as hex, in upper or lower case. The
+hash may contain hyphens, colons and whitespace. Other characters are
+not permitted.
.SS "tidy"
Simply reads the keyring from file and writes it back again. This has
the effect of removing any deleted keys from the file.
.SH "SEE ALSO"
.BR keyring (5).
.SH AUTHOR
-Mark Wooding, <mdw@nsict.org>
+Mark Wooding, <mdw@distorted.org.uk>
projects / u / mdw / catacomb / blobdiff