CRYPT_OID_INFO (Compact 2013)

3/28/2014

This structure contains information about an object identifier (OID). These structures give the relationship among an OID identifier, its name, its group, and other information on the OID. These structures can be listed using the CryptEnumOIDInfo function.

Syntax

typedef struct _CRYPT_OID_INFO {
  DWORD cbSize;
  LPCSTR pszOID;
  LPCWSTR pwszName;
  DWORD dwGroupId;
  union {
    DWORD dwValue;
    ALG_ID Algid;
    DWORD dwLength;
  };
  CRYPT_DATA_BLOB ExtraInfo;
} CRYPT_OID_INFO, *PCRYPT_OID_INFO;
typedef const CRYPT_OID_INFO CCRYPT_OID_INFO, *PCCRYPT_OID_INFO; 

Members

• cbSize
  Size of this structure in bytes.

• pszOID
  Object identifier associated with this OID information.

• pwszName
  Friendly name associated with an OID.

• dwGroupId
  Group identifier value associated with this OID information.

  The following table shows the group identifiers that are currently defined for dwGroupId.

  Group identifier	Description
  CRYPT_HASH_ALG_OID_GROUP_ID	Hash algorithms
  CRYPT_ENCRYPT_ALG_OID_GROUP_ID	Encryption algorithms
  CRYPT_PUBKEY_ALG_OID_GROUP_ID	Public key algorithms
  CRYPT_SIGN_ALG_OID_GROUP_ID	Signature algorithms
  CRYPT_RDN_ATTR_OID_GROUP_ID RDN	Attributes
  CRYPT_EXT_OR_ATTR_OID_GROUP_ID	Extensions or attributes
  CRYPT_ENHKEY_USAGE_OID_GROUP_ID	Enhanced key usages
  CRYPT_POLICY_OID_GROUP_ID	Policies

• dwValue
  Numeric value associated with this OID information. Used with dwGroupId CRYPT_SIGN_ALG_OID_GROUP_ID

• Algid
  Algorithm identifier associated with this OID information.

  Applies for the following values of dwGroupId:

  • CRYPT_HASH_ALG_OID_GROUP_ID
  • CRYPT_ENCRYPT_ALG_OID_GROUP_ID
  • CRYPT_PUBKEY_ALG_OID_GROUP_ID
  • CRYPT_SIGN_ALG_OID_GROUP_ID

• dwLength
  Not implemented and always set to zero.

• ExtraInfo
  Extra information used to find or register OID information. Applies for the following values of dwGroupId:

  • CRYPT_PUBKEY_ALG_OID_GROUP_ID
  • CRYPT_SIGN_ALG_OID_GROUP_ID
  • CRYPT_RDN_ATTR_OID_GROUP_ID

Requirements

See Also

Reference

Cryptography Structures
CryptEnumOIDInfo
CryptFindOIDInfo