CMSG_HASHED_ENCODE_INFO structure

The CMSG_HASHED_ENCODE_INFO structure is used with hashed messages. It is passed to the CryptMsgOpenToEncode function if the CryptMsgOpenToEncode function's dwMsgType parameter is CMSG_ENVELOPED.

Syntax

typedef struct _CMSG_HASHED_ENCODE_INFO {
  DWORD                      cbSize;
  HCRYPTPROV_LEGACY          hCryptProv;
  CRYPT_ALGORITHM_IDENTIFIER HashAlgorithm;
  void                       *pvHashAuxInfo;
} CMSG_HASHED_ENCODE_INFO, *PCMSG_HASHED_ENCODE_INFO;

Members

cbSize

The size, in bytes, of this structure.

hCryptProv

This member is not used and should be set to NULL.

Windows Server 2003 and Windows XP:  Specifies a handle to the cryptographic service provider (CSP) used to do the hash. The hCryptProv private keys are not used.

This member's data type is HCRYPTPROV.

Unless there is a strong reason for passing in a specific cryptographic provider in hCryptProv, pass zero to use the default RSA or DSS provider to be acquired before doing hash, signature verification, or recipient encryption operations.

HashAlgorithm

A CRYPT_ALGORITHM_IDENTIFIER structure that contains the hash algorithm type and any associated additional parameters.

pvHashAuxInfo

This member is currently not used and must be set to NULL.

Requirements

See also

CRYPT_ALGORITHM_IDENTIFIER