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CMSG_CTRL_DECRYPT_PARA (Windows Embedded CE 6.0)

  • Artículo

1/6/2010

This structure contains information used to decrypt an enveloped message for a key transport recipient. This structure is passed to CryptMsgControl if the dwCtrlType parameter is CMSG_CTRL_DECRYPT.

Important changes affecting the handling of enveloped messages have been made to CryptoAPI to support S/MIME e-mail interoperability. For details, see the Remarks section of CryptMsgOpenToEncode.

Syntax

typedef struct _CMSG_CTRL_DECRYPT_PARA {
  DWORD cbSize;
  HCRYPTPROV hCryptProv;
  DWORD dwKeySpec;
  DWORD dwRecipientIndex;
} CMSG_CTRL_DECRYPT_PARA, *PCMSG_CTRL_DECRYPT_PARA;

Members

  • cbSize
    Size of this structure in bytes.
  • hCryptProv
    Cryptographic service provider (CSP) handle.

  • dwKeySpec
    The private key to be used.

    The following dwKeySpec values are defined for the default provider.

    Value Description

    AT_KEYEXCHANGE

    Keys used to encrypt/decrypt session keys.

    AT_SIGNATURE

    Keys used to create and verify digital signatures.

    If dwKeySpec is zero, the default AT_KEYEXCHANGE is used.

  • dwRecipientIndex
    Index of the recipient in the message associated with the hCryptProv private key.

Requirements

Header wincrypt.h
Windows Embedded CE Windows CE .NET 4.0 and later

See Also

Reference

Cryptography Structures