dnssec-dsfromkey(8)

1DNSSEC-DSFROMKEY(8)                  BIND9                 DNSSEC-DSFROMKEY(8)
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NAME

6       dnssec-dsfromkey - DNSSEC DS RR generation tool
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SYNOPSIS

9       dnssec-dsfromkey [-1 | -2 | -a alg] [-C | -l domain] [-T TTL]
10                        [-v level] [-K directory] {keyfile}
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12       dnssec-dsfromkey [-1 | -2 | -a alg] [-C | -l domain] [-T TTL]
13                        [-v level] [-c class] [-A] {-f file} [dnsname]
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15       dnssec-dsfromkey [-1 | -2 | -a alg] [-C | -l domain] [-T TTL]
16                        [-v level] [-c class] [-K directory] {-s} {dnsname}
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18       dnssec-dsfromkey [-h | -V]
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DESCRIPTION

21       The dnssec-dsfromkey command outputs DS (Delegation Signer) resource
22       records (RRs) and other similarly-constructed RRs: with the -l option
23       it outputs DLV (DNSSEC Lookaside Validation) RRs; or with the -C it
24       outputs CDS (Child DS) RRs.
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26       The input keys can be specified in a number of ways:
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28       By default, dnssec-dsfromkey reads a key file named like
29       Knnnn.+aaa+iiiii.key, as generated by dnssec-keygen.
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31       With the -f file option, dnssec-dsfromkey reads keys from a zone file
32       or partial zone file (which can contain just the DNSKEY records).
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34       With the -s option, dnssec-dsfromkey reads a keyset- file, as generated
35       by dnssec-keygen -C.
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OPTIONS

38       -1
39           An abbreviation for -a SHA1
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41       -2
42           An abbreviation for -a SHA-256
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44       -a algorithm
45           Specify a digest algorithm to use when converting DNSKEY records to
46           DS records. This option can be repeated, so that multiple DS
47           records are created for each DNSKEY record.
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49           The algorithm must be one of SHA-1, SHA-256, or SHA-384. These
50           values are case insensitive, and the hyphen may be omitted. If no
51           algorithm is specified, the default is to use both SHA-1 and
52           SHA-256.
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54       -A
55           Include ZSKs when generating DS records. Without this option, only
56           keys which have the KSK flag set will be converted to DS records
57           and printed. Useful only in -f zone file mode.
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59       -c class
60           Specifies the DNS class (default is IN). Useful only in -s keyset
61           or -f zone file mode.
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63       -C
64           Generate CDS records rather than DS records. This is mutually
65           exclusive with the -l option for generating DLV records.
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67       -f file
68           Zone file mode: dnssec-dsfromkey's final dnsname argument is the
69           DNS domain name of a zone whose master file can be read from file.
70           If the zone name is the same as file, then it may be omitted.
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72           If file is "-", then the zone data is read from the standard input.
73           This makes it possible to use the output of the dig command as
74           input, as in:
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76           dig dnskey example.com | dnssec-dsfromkey -f - example.com
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78       -h
79           Prints usage information.
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81       -K directory
82           Look for key files or keyset- files in directory.
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84       -l domain
85           Generate a DLV set instead of a DS set. The specified domain is
86           appended to the name for each record in the set. This is mutually
87           exclusive with the -C option for generating CDS records.
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89       -s
90           Keyset mode: dnssec-dsfromkey's final dnsname argument is the DNS
91           domain name used to locate a keyset- file.
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93       -T TTL
94           Specifies the TTL of the DS records. By default the TTL is omitted.
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96       -v level
97           Sets the debugging level.
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99       -V
100           Prints version information.
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EXAMPLE

103       To build the SHA-256 DS RR from the Kexample.com.+003+26160 keyfile
104       name, you can issue the following command:
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106       dnssec-dsfromkey -2 Kexample.com.+003+26160
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108       The command would print something like:
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110       example.com. IN DS 26160 5 2
111       3A1EADA7A74B8D0BA86726B0C227AA85AB8BBD2B2004F41A868A54F0C5EA0B94
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FILES

114       The keyfile can be designated by the key identification
115       Knnnn.+aaa+iiiii or the full file name Knnnn.+aaa+iiiii.key as
116       generated by dnssec-keygen(8).
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118       The keyset file name is built from the directory, the string keyset-
119       and the dnsname.
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CAVEAT

122       A keyfile error can give a "file not found" even if the file exists.
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AUTHOR

130       Internet Systems Consortium, Inc.
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COPYRIGHT

133       Copyright © 2008-2012, 2014-2016, 2018-2021 Internet Systems
134       Consortium, Inc. ("ISC")
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138ISC                               2012-05-02               DNSSEC-DSFROMKEY(8)