dnssec-dsfromkey — DNSSEC DS RR generation tool
dnssec-dsfromkey
[
-1
| -2
| -a
]
[
alg-C
| -l
]
[domain-T ]
[TTL-v ]
[level-K ]
{keyfile}
directory
dnssec-dsfromkey
[
-1
| -2
| -a
]
[
alg-C
| -l
]
[domain-T ]
[TTL-v ]
[level-c ]
[class-A]
{-f }
[dnsname]
file
dnssec-dsfromkey
[
-1
| -2
| -a
]
[
alg-C
| -l
]
[domain-T ]
[TTL-v ]
[level-c ]
[class-K ]
{-s}
{dnsname}
directory
dnssec-dsfromkey
[
-h
| -V
]
The dnssec-dsfromkey command outputs DS (Delegation
Signer) resource records (RRs) and other similarly-constructed RRs:
with the -l option it outputs DLV (DNSSEC Lookaside
Validation) RRs; or with the -C it outputs CDS (Child
DS) RRs.
The input keys can be specified in a number of ways:
By default, dnssec-dsfromkey reads a key file
named like Knnnn.+aaa+iiiii.key, as generated
by dnssec-keygen.
With the -f
option, dnssec-dsfromkey reads keys from a zone file
or partial zone file (which can contain just the DNSKEY records).
file
With the -s
option, dnssec-dsfromkey reads
a keyset- file, as generated
by dnssec-keygen -C.
An abbreviation for -a SHA1
An abbreviation for -a SHA-256
algorithmSpecify a digest algorithm to use when converting DNSKEY records to DS records. This option can be repeated, so that multiple DS records are created for each DNSKEY record.
The algorithm must be one of
SHA-1, SHA-256, or SHA-384. These values are case insensitive,
and the hyphen may be omitted. If no algorithm is specified,
the default is SHA-256.
Include ZSKs when generating DS records. Without this option, only
keys which have the KSK flag set will be converted to DS records
and printed. Useful only in -f zone file mode.
class
Specifies the DNS class (default is IN). Useful only
in -s keyset or -f
zone file mode.
Generate CDS records rather than DS records. This is mutually
exclusive with the -l option for generating DLV
records.
file
Zone file mode: dnssec-dsfromkey's
final dnsname argument is
the DNS domain name of a zone whose master file can be read
from file. If the zone name is the same as
file, then it may be omitted.
If file is "-", then
the zone data is read from the standard input. This makes it
possible to use the output of the dig
command as input, as in:
dig dnskey example.com | dnssec-dsfromkey -f - example.com
Prints usage information.
directory
Look for key files or keyset- files in
directory.
domain
Generate a DLV set instead of a DS set. The specified
domain is appended to the name for each
record in the set.
This is mutually exclusive with the -C option
for generating CDS records.
Keyset mode: dnssec-dsfromkey's
final dnsname argument is the DNS
domain name used to locate a keyset- file.
TTLSpecifies the TTL of the DS records. By default the TTL is omitted.
levelSets the debugging level.
Prints version information.
To build the SHA-256 DS RR from the
Kexample.com.+003+26160
keyfile name, you can issue the following command:
dnssec-dsfromkey -2 Kexample.com.+003+26160
The command would print something like:
example.com. IN DS 26160 5 2 3A1EADA7A74B8D0BA86726B0C227AA85AB8BBD2B2004F41A868A54F0C5EA0B94