Struct trust_dns::rr::rdata::key::KEY

pub struct KEY { /* fields omitted */ }

RFC 2535, Domain Name System Security Extensions, March 1999

3. The KEY Resource Record

   The KEY resource record (RR) is used to store a public key that is
   associated with a Domain Name System (DNS) name.  This can be the
   public key of a zone, a user, or a host or other end entity. Security
   aware DNS implementations MUST be designed to handle at least two
   simultaneously valid keys of the same type associated with the same
   name.

   The type number for the KEY RR is 25.

   A KEY RR is, like any other RR, authenticated by a SIG RR.  KEY RRs
   must be signed by a zone level key.

3.1 KEY RDATA format

   The RDATA for a KEY RR consists of flags, a protocol octet, the
   algorithm number octet, and the public key itself.  The format is as
   follows:

                        1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             flags             |    protocol   |   algorithm   |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                                                               /
   /                          public key                           /
   /                                                               /
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|

   The KEY RR is not intended for storage of certificates and a separate
   certificate RR has been developed for that purpose, defined in [RFC
   2538].

   The meaning of the KEY RR owner name, flags, and protocol octet are
   described in Sections 3.1.1 through 3.1.5 below.  The flags and
   algorithm must be examined before any data following the algorithm
   octet as they control the existence and format of any following data.
   The algorithm and public key fields are described in Section 3.2.
   The format of the public key is algorithm dependent.

   KEY RRs do not specify their validity period but their authenticating
   SIG RR(s) do as described in Section 4 below.

3.1.1 Object Types, DNS Names, and Keys

   The public key in a KEY RR is for the object named in the owner name.

   A DNS name may refer to three different categories of things.  For
   example, foo.host.example could be (1) a zone, (2) a host or other
   end entity , or (3) the mapping into a DNS name of the user or
   account foo@host.example.  Thus, there are flag bits, as described
   below, in the KEY RR to indicate with which of these roles the owner
   name and public key are associated.  Note that an appropriate zone
   KEY RR MUST occur at the apex node of a secure zone and zone KEY RRs
   occur only at delegation points.

3.1.2 The KEY RR Flag Field

   In the "flags" field:

     0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5
   +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
   |  A/C  | Z | XT| Z | Z | NAMTYP| Z | Z | Z | Z |      SIG      |
   +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+

   Bit 0 and 1 are the key "type" bits whose values have the following
   meanings:

           10: Use of the key is prohibited for authentication.
           01: Use of the key is prohibited for confidentiality.
           00: Use of the key for authentication and/or confidentiality
               is permitted. Note that DNS security makes use of keys
               for authentication only. Confidentiality use flagging is
               provided for use of keys in other protocols.
               Implementations not intended to support key distribution
               for confidentiality MAY require that the confidentiality
               use prohibited bit be on for keys they serve.
           11: If both bits are one, the "no key" value, there is no key
               information and the RR stops after the algorithm octet.
               By the use of this "no key" value, a signed KEY RR can
               authenticatably assert that, for example, a zone is not
               secured.  See section 3.4 below.

   Bits 2 is reserved and must be zero.

   Bits 3 is reserved as a flag extension bit.  If it is a one, a second
          16 bit flag field is added after the algorithm octet and
          before the key data.  This bit MUST NOT be set unless one or
          more such additional bits have been defined and are non-zero.

   Bits 4-5 are reserved and must be zero.

   Bits 6 and 7 form a field that encodes the name type. Field values
   have the following meanings:

           00: indicates that this is a key associated with a "user" or
               "account" at an end entity, usually a host.  The coding
               of the owner name is that used for the responsible
               individual mailbox in the SOA and RP RRs: The owner name
               is the user name as the name of a node under the entity
               name.  For example, "j_random_user" on
               host.subdomain.example could have a public key associated
               through a KEY RR with name
               j_random_user.host.subdomain.example.  It could be used
               in a security protocol where authentication of a user was
               desired.  This key might be useful in IP or other
               security for a user level service such a telnet, ftp,
               rlogin, etc.
           01: indicates that this is a zone key for the zone whose name
               is the KEY RR owner name.  This is the public key used
               for the primary DNS security feature of data origin
               authentication.  Zone KEY RRs occur only at delegation
               points.
           10: indicates that this is a key associated with the non-zone
               "entity" whose name is the RR owner name.  This will
               commonly be a host but could, in some parts of the DNS
               tree, be some other type of entity such as a telephone
               number [RFC 1530] or numeric IP address.  This is the
               public key used in connection with DNS request and
               transaction authentication services.  It could also be
               used in an IP-security protocol where authentication at
               the host, rather than user, level was desired, such as
               routing, NTP, etc.
           11: reserved.

   Bits 8-11 are reserved and must be zero.

   Bits 12-15 are the "signatory" field.  If non-zero, they indicate
              that the key can validly sign things as specified in DNS
              dynamic update [RFC 2137].  Note that zone keys (see bits
              6 and 7 above) always have authority to sign any RRs in
              the zone regardless of the value of the signatory field.

Methods

impl KEY

fn new(
    key_trust: KeyTrust,
    key_usage: KeyUsage,
    signatory: UpdateScope,
    protocol: Protocol,
    algorithm: Algorithm,
    public_key: Vec<u8>
) -> KEY

Construct a new KEY RData

Arguments

• key_trust - declare the security level of this key
• key_usage - what type of thing is this key associated to
• revoke - this key has been revoked
• algorithm - specifies the algorithm which this Key uses to sign records
• public_key - the public key material, in native endian, the emitter will perform any necessary conversion

Return

A new KEY RData for use in a Resource Record

fn key_trust(&self) -> KeyTrust

Returns the trust level of the key

fn key_usage(&self) -> KeyUsage

Returns the entity type using this key

fn signatory(&self) -> UpdateScope

Returns the signatory information of the KEY

fn revoke(&self) -> bool

Returns true if the key_trust is DoNotTrust

fn protocol(&self) -> Protocol

Returns the protocol which this key can be used with

fn algorithm(&self) -> Algorithm

RFC 4034, DNSSEC Resource Records, March 2005

2.1.3.  The Algorithm Field

   The Algorithm field identifies the public key's cryptographic
   algorithm and determines the format of the Public Key field.  A list
   of DNSSEC algorithm types can be found in Appendix A.1

fn public_key(&self) -> &[u8]

RFC 4034, DNSSEC Resource Records, March 2005

2.1.4.  The Public Key Field

   The Public Key Field holds the public key material.  The format
   depends on the algorithm of the key being stored and is described in
   separate documents.

Trait Implementations

impl Verifier for KEY

fn algorithm(&self) -> Algorithm

Return the algorithm which this Verifier covers

fn key<'k>(&'k self) -> DnsSecResult<PublicKeyEnum<'k>>

Return the public key associated with this verifier

fn verify(&self, hash: &[u8], signature: &[u8]) -> DnsSecResult<()>

Verifies the hash matches the signature with the current key.

fn verify_message(
    &self,
    message: &Message,
    signature: &[u8],
    sig0: &SIG
) -> DnsSecResult<()>

Verifies a message with the against the given signature, i.e. SIG0

fn verify_rrsig(
    &self,
    name: &Name,
    dns_class: DNSClass,
    sig: &SIG,
    records: &[Record]
) -> DnsSecResult<()>

Verifies an RRSig with the associated key, e.g. DNSKEY

impl Debug for KEY

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl PartialEq for KEY

fn eq(&self, __arg_0: &KEY) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &KEY) -> bool

This method tests for !=.

impl Eq for KEY

impl Hash for KEY

fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl Clone for KEY

fn clone(&self) -> KEY

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.