CMSG_KEY_AGREE_RECIPIENT_INFO structure (wincrypt.h)
The CMSG_KEY_AGREE_RECIPIENT_INFO structure contains information used for key agreement algorithms.
Syntax
typedef struct _CMSG_KEY_AGREE_RECIPIENT_INFO {
DWORD dwVersion;
DWORD dwOriginatorChoice;
union {
CERT_ID OriginatorCertId;
CERT_PUBLIC_KEY_INFO OriginatorPublicKeyInfo;
} DUMMYUNIONNAME;
CRYPT_DATA_BLOB UserKeyingMaterial;
CRYPT_ALGORITHM_IDENTIFIER KeyEncryptionAlgorithm;
DWORD cRecipientEncryptedKeys;
PCMSG_RECIPIENT_ENCRYPTED_KEY_INFO *rgpRecipientEncryptedKeys;
} CMSG_KEY_AGREE_RECIPIENT_INFO, *PCMSG_KEY_AGREE_RECIPIENT_INFO;
Members
dwVersion
A DWORD that indicates the version of the structure. Always set to three.
dwOriginatorChoice
A DWORD that indicates the key identifier to use.
This member can be one of the following values.
Value | Meaning |
---|---|
|
OriginatorCertId |
|
OriginatorPublicKeyInfo |
DUMMYUNIONNAME
DUMMYUNIONNAME.OriginatorCertId
A CERT_ID that identifies the public key of the message originator.
DUMMYUNIONNAME.OriginatorPublicKeyInfo
A CERT_PUBLIC_KEY_INFO structure that contains the public key of the message originator.
UserKeyingMaterial
A CRYPT_DATA_BLOB that indicates that a different key is generated each time the same two parties generate a pair of keys. The sender provides the bits of this BLOB with some key agreement algorithms. This member can be NULL.
KeyEncryptionAlgorithm
A CRYPT_ALGORITHM_IDENTIFIER that identifies the key-encryption algorithm and any associated parameters used to encrypt the content encryption key.
cRecipientEncryptedKeys
The number of elements in the rgpRecipientEncryptedKeys array.
rgpRecipientEncryptedKeys
The address of an array of CMSG_RECIPIENT_ENCRYPTED_KEY_INFO structures that contains information about the key recipients. The cRecipientEncryptedKeys member contains the number of elements in this array.
Requirements
Requirement | Value |
---|---|
Minimum supported client | Windows XP [desktop apps only] |
Minimum supported server | Windows Server 2003 [desktop apps only] |
Header | wincrypt.h |