DNS_DS_DATA structure (windns.h)
The DNS_DS_DATA structure represents a DS resource record (RR) as specified in section 2 of RFC 4034 and is used to verify the contents of DNS_DNSKEY_DATA.
Syntax
typedef struct {
WORD wKeyTag;
BYTE chAlgorithm;
BYTE chDigestType;
WORD wDigestLength;
WORD wPad;
#if ...
BYTE Digest[];
#else
BYTE Digest[1];
#endif
} DNS_DS_DATA, *PDNS_DS_DATA;
Members
wKeyTag
A value that represents the method to choose which public key is used to verify Signature in DNS_RRSIG_DATA as specified in Appendix B of RFC 4034. This value is identical to the wKeyTag field in DNS_RRSIG_DATA.
chAlgorithm
A value that specifies the algorithm defined by DNS_DNSKEY_DATA. The possible values are shown in the following table.
| Value | Meaning |
|---|---|
|
RSA/MD5 (RFC 2537) |
|
Diffie-Hellman (RFC 2539) |
|
DSA (RFC 2536) |
|
Elliptic curve cryptography |
|
RSA/SHA-1 (RFC 3110) |
chDigestType
A value that specifies the cryptographic algorithm used to generate Digest. The possible values are shown in the following table.
| Value | Meaning |
|---|---|
|
SHA-1 (RFC 3174) |
wDigestLength
The length, in bytes. of the message digest in Digest. This value is determined by the algorithm type in chDigestType.
wPad
Reserved for padding. Do not use.
Digest
A BYTE array that contains a cryptographic digest of the DNSKEY RR and RDATA as specified in section 5.1.4 of RFC 4034. Its length is determined by wDigestLength.
Digest[1]
A BYTE array that contains a cryptographic digest of the DNSKEY RR and RDATA as specified in section 5.1.4 of RFC 4034. Its length is determined by wDigestLength.
Remarks
The DNS_DS_DATA structure is used in conjunction with the DNS_RECORD structure to programmatically manage DNS entries.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 7 [desktop apps only] |
| Minimum supported server | Windows Server 2008 R2 [desktop apps only] |
| Header | windns.h |