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DNSSEC-KEYGEN(8)		     BIND9		      DNSSEC-KEYGEN(8)

NAME
       dnssec-keygen - DNSSEC key generation tool

SYNOPSIS
       dnssec-keygen {-a algorithm} {-b	keysize} {-n nametype} [-c class] [-e]
		     [-f flag] [-g generator] [-h] [-k]	[-p protocol]
		     [-r randomdev] [-s	strength] [-t type] [-v	level] {name}

DESCRIPTION
       dnssec-keygen generates keys for	DNSSEC (Secure DNS), as	defined	in RFC
       2535 and	RFC <TBA\>. It can also	generate keys for use with TSIG
       (Transaction Signatures), as defined in RFC 2845.

OPTIONS
       -a algorithm
	      Selects the cryptographic	algorithm. The value of	algorithm must
	      be one of	RSAMD5 (RSA) or	RSASHA1, DSA, DH (Diffie Hellman), or
	      HMAC-MD5.	These values are case insensitive.

	      Note 1: that for DNSSEC, RSASHA1 is a mandatory to implement
	      algorithm, and DSA is recommended. For TSIG, HMAC-MD5 is
	      mandatory.

	      Note 2: HMAC-MD5 and DH automatically set	the -k flag.

       -b keysize
	      Specifies	the number of bits in the key. The choice of key size
	      depends on the algorithm used. RSAMD5 / RSASHA1 keys must	be
	      between 512 and 2048 bits. Diffie	Hellman	keys must be between
	      128 and 4096 bits. DSA keys must be between 512 and 1024 bits
	      and an exact multiple of 64. HMAC-MD5 keys must be between 1 and
	      512 bits.

       -n nametype
	      Specifies	the owner type of the key. The value of	nametype must
	      either be	ZONE (for a DNSSEC zone	key (KEY/DNSKEY)), HOST	or
	      ENTITY (for a key	associated with	a host (KEY)), USER (for a key
	      associated with a	user(KEY)) or OTHER (DNSKEY). These values are
	      case insensitive.

       -c class
	      Indicates	that the DNS record containing the key should have the
	      specified	class. If not specified, class IN is used.

       -e     If generating an RSAMD5/RSASHA1 key, use a large exponent.

       -f flag
	      Set the specified	flag in	the flag field of the KEY/DNSKEY
	      record. The only recognized flag is KSK (Key Signing Key)
	      DNSKEY.

       -g generator
	      If generating a Diffie Hellman key, use this generator. Allowed
	      values are 2 and 5. If no	generator is specified,	a known	prime
	      from RFC 2539 will be used if possible; otherwise	the default is
	      2.

       -h     Prints a short summary of	the options and	arguments to
	      dnssec-keygen.

       -k     Generate KEY records rather than DNSKEY records.

       -p protocol
	      Sets the protocol	value for the generated	key. The protocol is a
	      number between 0 and 255.	The default is 3 (DNSSEC). Other
	      possible values for this argument	are listed in RFC 2535 and its
	      successors.

       -r randomdev
	      Specifies	the source of randomness. If the operating system does
	      not provide a /dev/random	or equivalent device, the default
	      source of	randomness is keyboard input.  randomdev specifies the
	      name of a	character device or file containing random data	to be
	      used instead of the default. The special value keyboard
	      indicates	that keyboard input should be used.

       -s strength
	      Specifies	the strength value of the key. The strength is a
	      number between 0 and 15, and currently has no defined purpose in
	      DNSSEC.

       -t type
	      Indicates	the use	of the key.  type must be one of AUTHCONF,
	      NOAUTHCONF, NOAUTH, or NOCONF. The default is AUTHCONF. AUTH
	      refers to	the ability to authenticate data, and CONF the ability
	      to encrypt data.

       -v level
	      Sets the debugging level.

GENERATED KEYS
       When dnssec-keygen completes successfully, it prints a string of	the
       form Knnnn.+aaa+iiiii to	the standard output. This is an	identification
       string for the key it has generated.

       o  nnnn is the key name.

       o  aaa is the numeric representation of the algorithm.

       o  iiiii	is the key identifier (or footprint).

       dnssec-keygen creates two file, with names based	on the printed string.
       Knnnn.+aaa+iiiii.key contains the public	key, and
       Knnnn.+aaa+iiiii.private	contains the private key.

       The .key	file contains a	DNS KEY	record that can	be inserted into a
       zone file (directly or with a $INCLUDE statement).

       The .private file contains algorithm specific fields. For obvious
       security	reasons, this file does	not have general read permission.

       Both .key and .private files are	generated for symmetric	encryption
       algorithm such as HMAC-MD5, even	though the public and private key are
       equivalent.

EXAMPLE
       To generate a 768-bit DSA key for the domain example.com, the following
       command would be	issued:

       dnssec-keygen -a	DSA -b 768 -n ZONE example.com

       The command would print a string	of the form:

       Kexample.com.+003+26160

       In this example,	dnssec-keygen creates the files
       Kexample.com.+003+26160.key and Kexample.com.+003+26160.private

SEE ALSO
       dnssec-signzone(8), BIND	9 Administrator	Reference Manual, RFC 2535,
       RFC 2845, RFC 2539.

AUTHOR
       Internet	Systems	Consortium

BIND9				 June 30, 2000		      DNSSEC-KEYGEN(8)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | GENERATED KEYS | EXAMPLE | SEE ALSO | AUTHOR

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