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INTERNET_CERTIFICATE_INFO structure (wininet.h)

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Contains certificate information returned from the server. This structure is used by the InternetQueryOption function.

Syntax

typedef struct {
  FILETIME ftExpiry;
  FILETIME ftStart;
  LPTSTR   lpszSubjectInfo;
  LPTSTR   lpszIssuerInfo;
  LPTSTR   lpszProtocolName;
  LPTSTR   lpszSignatureAlgName;
  LPTSTR   lpszEncryptionAlgName;
  DWORD    dwKeySize;
} INTERNET_CERTIFICATE_INFO, *LPINTERNET_CERTIFICATE_INFO;

Members

ftExpiry

FILETIME structure that contains the date the certificate expires.

ftStart

FILETIME structure that contains the date the certificate becomes valid.

lpszSubjectInfo

Pointer to a buffer that contains the name of the organization, site, and server for which the certificate was issued. The application must call LocalFree to release the resources allocated for this parameter.

lpszIssuerInfo

Pointer to a buffer that contains the name of the organization, site, and server that issued the certificate. The application must call LocalFree to release the resources allocated for this parameter.

lpszProtocolName

Pointer to a buffer that contains the name of the protocol used to provide the secure connection. The application must call LocalFree to release the resources allocated for this parameter.

lpszSignatureAlgName

Pointer to a buffer that contains the name of the algorithm used for signing the certificate. The application must call LocalFree to release the resources allocated for this parameter.

lpszEncryptionAlgName

Pointer to a buffer that contains the name of the algorithm used for doing encryption over the secure channel (SSL/PCT) connection. The application must call LocalFree to release the resources allocated for this parameter.

dwKeySize

Size, in TCHARs, of the key.

Remarks

Despite what the header indicates, the implementation of INTERNET_CERTIFICATE_INFO is not Unicode-aware. All of the string members are filled as ANSI strings regardless of whether Unicode is enabled. Consequently, when reading these values, the caller must cast them to LPSTR if Unicode is enabled.

Applications requesting this information must free pointers that are allocated and placed in the returned structure.

Note  WinINet does not support server implementations. In addition, it should not be used from a service. For server implementations or services use Microsoft Windows HTTP Services (WinHTTP).
 

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Header wininet.h

See also

InternetQueryOption