System Administration Commands dnssec-keygen(1M)
NAME
dnssec-keygen - DNSSEC key generation tool
SYNOPSIS
dnssec-keygen -a algorithm -b keysize -n nametype [-ehk]
[-c class] [-f flag] [-g generator] [-p protocol]
[-r randomdev] [-s strength] [-t type] [-v level] name
DESCRIPTION
The dnssec-keygen utility generates keys for DNSSEC (Secure
DNS), as defined in RFC 2535 and RFC 4034. It can also gen-
erate keys for use with TSIG (Transaction Signatures), as defined in RFC 2845. OPTIONS The following options are supported:-a algorithm
Select the cryptographic algorithm. The value of algo-
rithm must be one of RSAMD5 (RSA) or RSASHA1, DSA,NSEC3RSASHA1, NSEC3DSA, DH (Diffie-Hellman), or HMAC-
MD5. These values are case insensitive.For DNSSEC, RSASHA1 is a mandatory-to-implement algo-
rithm and DSA is recommended. For TSIG, HMAC-MD5 is man-
datory.Note -
HMAC-MD5 and DH automatically set the -k flag.
-b keysize
Specify the number of bits in the key. The choice of key size depends on the algorithm used. RSAMD5 and RSASHA1keys 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.
-c class
Indicate that the DNS record containing the key should have the specified class. If not specified, class IN is used.SunOS 5.11 Last change: 11 Jan 2010 1
System Administration Commands dnssec-keygen(1M)
-e
Use a large exponent if generating an RSAMD5 or RSASHA1 key.-f flag
Set the specified flag in the flag field of theKEY/DNSKEY record. The only recognized flag is KSK (Key Signing Key) DNSKEY.
-g generator
Use this generator if generating a Diffie Hellman key.Allowed values are 2 and 5. If no generator is speci-
fied, a known prime from RFC 2539 will be used if possi-
ble; otherwise the default is 2.-h
Print a short summary of the options and arguments todnssec-keygen.
-k
Generate KEY records rather than DNSKEY records.-n nametype
Specify 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. Defaults to ZONE for DNSKEY generation.
-p protocol
Set the protocol value for the generated key. The proto-
col argument 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
SunOS 5.11 Last change: 11 Jan 2010 2
System Administration Commands dnssec-keygen(1M)
Specify the source of randomness. If the operating sys-
tem does not provide a /dev/random or equivalent device,the default source of randomness is keyboard input. ran-
domdev 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
Specify the strength value of the key. The strength argument is a number between 0 and 15, and currently has no defined purpose in DNSSEC.-t type
Indicate the use of the key. type must be one of AUTH-
CONF, 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
Set the debugging level. GENERATED KEYSWhen 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 gen-
erated. o nnnn is the key name. o aaa is the numeric representation of the algorithm. o iiiii is the key identifier (or footprint).The dnssec-keygen utility creates two files, with names
based on the printed string. o Knnnn.+aaa+iiiii.key contains the public key. o Knnnn.+aaa+iiiii.private contains the private key. The .key file contains a DNS KEY record that can be insertedinto a zone file (directly or with a $INCLUDE statement).
SunOS 5.11 Last change: 11 Jan 2010 3
System Administration Commands dnssec-keygen(1M)
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 symmetricencryption algorithm such as HMAC-MD5, even though the pub-
lic and private key are equivalent.EXAMPLES
Example 1 Generating a 768-bit DSA Key
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 The following files would be created: Kexample.com.+003+26160.key Kexample.com.+003+26160.privateATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:SunOS 5.11 Last change: 11 Jan 2010 4
System Administration Commands dnssec-keygen(1M)
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | service/network/dns/bind ||_____________________________|_____________________________|
| Interface Stability | Volatile ||_____________________________|_____________________________|
SEE ALSO
dnssec-signzone(1M), attributes(5)
RFC 2539, RFC 2845, RFC 4033 See the BIND 9 Administrator's Reference Manual. As of the date of publication of this man page, this document is available at https://www.isc.org/software/bind/documentation.SunOS 5.11 Last change: 11 Jan 2010 5