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CERT_AUTHORITY_KEY_ID2_INFO (Compact 2013)

  • Article

3/28/2014

This structure identifies the key used to sign a certificate. It differs from the CERT_AUTHORITY_KEY_ID_INFO structure in that the certificate issuer is a CERT_ALT_NAME_INFO structure instead of a CERT_NAME_BLOB structure. Otherwise, the structures are used in the same way.

The key can be identified by an explicit key identifier, by giving a certificate's issuer and serial number, or by giving both. If both are used, the certificate issuer must ensure that the explicit key identifier, the certificate issuer, and the serial number are consistent.

The CryptDecodeObject function creates an instance of this structure when performed on a CERT_EXTENSION structure's Value member with the structure's pszObjId member set to szOID_AUTHORITY_KEY_IDENTIFIER2.

An instance of this structure can be used as input to the CryptEncodeObject function to create an appropriate CERT_EXTENSION structure.

Syntax

typedef struct _CERT_AUTHORITY_KEY_ID2_INFO {
  CRYPT_DATA_BLOB KeyId;
  CERT_ALT_NAME_INFO AuthorityCertIssuer;
  CRYPT_INTEGER_BLOB AuthorityCertSerialNumber;
} CERT_AUTHORITY_KEY_ID2_INFO, *PCERT_AUTHORITY_KEY_ID2_INFO;

Members

  • KeyId
    CRYPT_DATA_BLOB structure containing a unique identifier of a public key.
  • AuthorityCertIssuer
    CERT_ALT_NAME_INFO structure that includes the encoded name of the certification authority (CA) that issued the certificate. The cAltEntry member of the structure may be set to zero if the name is not to be used to identify the CA.
  • AuthorityCertSerialNumber
    CRYPT_INTEGER_BLOB structure that includes the serial number of the certificate associated with the private key used to sign this certificate. For more details, see the CERT_INFO structure.

Requirements

Header

wincrypt.h

See Also

Reference

Cryptography Structures
CERT_ALT_NAME_INFO
CERT_AUTHORITY_KEY_ID_INFO
CERT_EXTENSION
CERT_INFO
BLOB (Cryptography)
BLOB (Cryptography)
BLOB (Cryptography)