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
Note 2: HMAC-MD5 and DH automatically set the -k flag.
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
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
Indicates that the DNS record containing the key should have the
specified class. If not specified, class IN is used.
If generating an RSAMD5/RSASHA1 key, use a large exponent.
Set the specified flag in the flag field of the KEY/DNSKEY
record. The only recognized flag is KSK (Key Signing Key)
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
Prints a short summary of the options and arguments to
Generate KEY records rather than DNSKEY records.
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
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.
Specifies the strength value of the key. The strength is a
number between 0 and 15, and currently has no defined purpose in
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.