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This structure contains information used to decrypt an enveloped message for a key transport recipient. This structure is passed to CryptMsgControlif the dwCtrlTypeparameter 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 dwKeySpecvalues 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 dwKeySpecis zero, the default AT_KEYEXCHANGE is used.
- dwRecipientIndex
-
Index of the recipient in the message associated with the hCryptProvprivate key.
Requirements
Header | wincrypt.h |
Windows Embedded CE | Windows CE .NET 4.0 and later |
Windows Mobile | Windows Mobile Version 5.0 and later |
See Also
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