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CRYPT_RETRIEVE_AUX_INFO structure

The CRYPT_RETRIEVE_AUX_INFO structure contains optional information to pass to the CryptRetrieveObjectByUrl function. All unused members of this structure must contain zero.

Syntax


typedef struct CRYPT_RETRIEVE_AUX_INFO {
  DWORD                              cbSize;
  FILETIME                           *pLastSyncTime;
  DWORD                              dwMaxUrlRetrievalByteCount;
  PCRYPTNET_URL_CACHE_PRE_FETCH_INFO pPreFetchInfo;
  PCRYPTNET_URL_CACHE_FLUSH_INFO     pFlushInfo;
  PCRYPTNET_URL_CACHE_RESPONSE_INFO  *ppResponseInfo;
  LPWSTR                             pwszCacheFileNamePrefix;
  LPFILETIME                         pftCacheResync;
  BOOL                               fProxyCacheRetrieval;
  DWORD                              dwHttpStatusCode;
} CRYPT_RETRIEVE_AUX_INFO, *PCRYPT_RETRIEVE_AUX_INFO;

Members

cbSize

The size, in bytes, of the structure.

pLastSyncTime

A FILETIME structure that contains the time of the last synchronization of the data retrieved.

dwMaxUrlRetrievalByteCount

A value that specifies a limit to the number of byes retrieved. A value of zero or less specifies no limit.

pPreFetchInfo

A pointer to a CRYPTNET_URL_CACHE_PRE_FETCH_INFO structure. To get prefetch information, set its cbSize upon input. For no prefetch information, except for cbSize, the data structure contains zero upon return.

pFlushInfo

A pointer to a CRYPTNET_URL_CACHE_FLUSH_INFO structure. To get flush information, set its cbSize upon input. For no flush information, except for cbSize, the data structure contains zero upon return.

ppResponseInfo

A pointer to a PCRYPTNET_URL_CACHE_RESPONSE_INFO structure. To get response information, set the pointer to the address of a CRYPTNET_URL_CACHE_RESPONSE_INFO pointer updated with the allocated structure. For no response information, ppResponseInfo is set to NULL. If it is not NULL, it must be freed by using the CryptMemFree function.

pwszCacheFileNamePrefix

A pointer to a string that contains a prefix for a cached file name. If not NULL, the specified prefix string is concatenated to the front of the cached file name.

pftCacheResync

A pointer to a FILETIME structure that specifies a cache synchronization time. If not NULL, any information cached before this time is considered time invalid. For a CRYPT_CACHE_ONLY_RETRIEVAL, if there is a cached entry before this time, CryptRetrieveObjectByUrl returns ERROR_INVALID_TIME. When used with an HTTP retrieval, this specifies the maximum age for a time-valid object.

fProxyCacheRetrieval

A value that indicates whether CryptRetrieveObjectByUrl was called with CRYPT_PROXY_CACHE_RETRIEVAL set in dwRetrievalFlags and a proxy cache was not explicitly bypassed for the retrieval. This flag is not explicitly cleared and only applies to HTTP URL retrievals.

dwHttpStatusCode

A value that specifies a status code from an unsuccessful HTTP response header. If CRYPT_NOT_MODIFIED_RETRIEVAL was set in dwRetrievalFlags, and the HTTP retrieval returns HTTP_STATUS_NOT_MODIFIED, this contains the HTTP_STATUS_NOT_MODIFIED status code. This value is not explicitly cleared and is only updated for HTTP or HTTPS URL retrievals.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

Wincrypt.h

 

 

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