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DNS_TKEY_DATAA structure (windns.h)

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The DNS_TKEY_DATA structure represents a DNS TKEY resource record, used to establish and delete an algorithm's shared-secret keys between a DNS resolver and server as specified in RFC 2930.

Syntax

typedef struct {
  PSTR  pNameAlgorithm;
  PBYTE pAlgorithmPacket;
  PBYTE pKey;
  PBYTE pOtherData;
  DWORD dwCreateTime;
  DWORD dwExpireTime;
  WORD  wMode;
  WORD  wError;
  WORD  wKeyLength;
  WORD  wOtherLength;
  UCHAR cAlgNameLength;
  BOOL  bPacketPointers;
} DNS_TKEY_DATAA, *PDNS_TKEY_DATAA;

Members

pNameAlgorithm

A pointer to a string that represents the name of the key as defined in section 2.1 of RFC 2930.

pAlgorithmPacket

A pointer to a string representing the name of the algorithm as defined in section 2.3 of RFC 2930. pKey is used to derive the algorithm specific keys.

pKey

A pointer to the variable-length shared-secret key.

pOtherData

Reserved. Do not use.

dwCreateTime

The date and time at which the key was created, expressed in seconds since the beginning of January 1, 1970, Greenwich Mean Time (GMT), excluding leap seconds.

dwExpireTime

The expiration date of the key, expressed in seconds since the beginning of January 1, 1970, Greenwich Mean Time (GMT), excluding leap seconds.

wMode

A scheme used for key agreement or the purpose of the TKEY DNS Message. Possible values for wMode are listed below:

Value Meaning
DNS_TKEY_MODE_SERVER_ASSIGN
 The key is assigned by the DNS server and is not negotiated.
DNS_TKEY_MODE_DIFFIE_HELLMAN
 The Diffie-Hellman key exchange algorithm is used to negotiate the key.
DNS_TKEY_MODE_GSS
The key is exchanged through Generic Security Services-Application Program Interface (GSS-API) negotiation.
DNS_TKEY_MODE_RESOLVER_ASSIGN
 The key is assigned by the DNS resolver and is not negotiated.

wError

An error, expressed in expanded RCODE format that covers TSIG and TKEY RR processing.

Value Meaning
DNS_RCODE_BADSIG
 The pSignature of the DNS_TSIG_DATA RR is bad.
DNS_RCODE_BADKEY
 The pKey field is bad.
DNS_RCODE_BADTIME
 A timestamp is bad.

wKeyLength

Length, in bytes, of the pKey member.

wOtherLength

The length, in bytes, of the pOtherData member.

cAlgNameLength

The length, in bytes, of the pNameAlgorithm member.

bPacketPointers

Reserved. Do not use.

Remarks

The DNS_TKEY_DATA structure is used in conjunction with the DNS_RECORD structure to programmatically manage DNS entries.

Note

The windns.h header defines DNS_TKEY_DATA as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Header windns.h

See also

DNS_RECORD

DNS_TSIG_DATA