DNS_SIG_DATA

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Windows Embedded CE 6.0 R3

4/8/2010

This structure represents a DNS signature (SIG) record.

Syntax

typedef struct {
  LPTSTR pNameSigner;
  WORD wTypeCovered;
  BYTE chAlgorithm;
  BYTE chLabelCount;
  DWORD dwOriginalTtl;
  DWORD dwExpiration;
  DWORD dwTimeSigned;
  WORD wKeyTag;
  WORD Pad;
  BYTE Signature[1];
} DNS_SIG_DATA, *PDNS_SIG_DATA;

Members

• pNameSigner
  [in] Pointer to a string representing the name of the signer that generated the record

• wTypeCovered
  [in] Type of RR covered by the signature

• chAlgorithm
  [in] Algorithm used with the key specified in the RR. The assigned values are shown in the following table.

  Value	Meaning
  1	RSA/MD5 (RFC 2537)
  2	Diffie-Hellman (RFC 2539)
  3	DSA (RFC 2536)
  4	Elliptic curve cryptography

• chLabelCount
  [in] Number of labels in the original signature RR owner name. The count does not include the NULL label for the root, nor any initial wildcards.

• dwOriginalTtl
  [in] TTL value of the RR set signed by the signature RR. A TTL of zero (0) indicates that the time to live is 10 minutes.

• dwExpiration
  [in] Expiration date, expressed in seconds since the beginning of January 1, 1970, Greenwich Mean Time (GMT), excluding leap seconds.

• dwTimeSigned
  [in] Date and time at which the signature becomes valid, expressed in seconds since the beginning of January 1, 1970, Greenwich Mean Time (GMT), excluding leap seconds.

• wKeyTag
  [in] Method used to choose a key that verifies a signature. See RFC 2535, Appendix C for the method used to calculate a KeyTag.

• Pad
  [in] Reserved. Used to keep byte field aligned.

• Signature
  [in] Signature, represented in base 64, formatted as defined in RFC 2535, Appendix A.

Remarks

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

Requirements

See Also

Reference

DNS Structures