CRYPT_KEY_SIGN_MESSAGE_PARA structure
The CRYPT_KEY_SIGN_MESSAGE_PARA structure contains information about the cryptographic service provider (CSP) and algorithms used to sign a message.
Syntax
typedef struct _CRYPT_KEY_SIGN_MESSAGE_PARA { DWORD cbSize; DWORD dwMsgAndCertEncodingType; union { HCRYPTPROV hCryptProv; NCRYPT_KEY_HANDLE hNCryptKey; }; DWORD dwKeySpec; CRYPT_ALGORITHM_IDENTIFIER HashAlgorithm; void *pvHashAuxInfo; CRYPT_ALGORITHM_IDENTIFIER PubKeyAlgorithm; } CRYPT_KEY_SIGN_MESSAGE_PARA, *PCRYPT_KEY_SIGN_MESSAGE_PARA;
Members
- cbSize
-
The size, in bytes, of this data structure.
- dwMsgAndCertEncodingType
-
Specifies the type of message and certificate encoding used. This can be a combination of one or more of the following values.
Value Meaning - X509_ASN_ENCODING
Specifies X.509 certificate encoding.
- PKCS_7_ASN_ENCODING
Specifies PKCS 7 message encoding.
- hCryptProv
-
The handle of the CSP to use to sign the message. The CryptAcquireContext function is called to obtain this handle.
- hNCryptKey
-
The handle of the Cryptography API: Next Generation (CNG) CSP to use to sign the message. CNG signature algorithms are only supported in CNG functions.
- dwKeySpec
-
Identifies the type of private key to use to sign the message. This must be one of the following values. This member is ignored if a CNG key is passed in the hNCryptKey member.
Value Meaning - AT_KEYEXCHANGE
Use the key exchange key.
- AT_SIGNATURE
Use the digital signature key.
- HashAlgorithm
-
A CRYPT_ALGORITHM_IDENTIFIER structure that specifies the algorithm to use to generate the hash of the message. This must be a hash algorithm.
- pvHashAuxInfo
-
This member is not used and must be set to NULL.
- PubKeyAlgorithm
-
A CRYPT_ALGORITHM_IDENTIFIER structure that specifies the algorithm to use to sign the message. This must be either a public key or a signature algorithm.
Requirements
|
Minimum supported client |
Windows XP [desktop apps only] |
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Minimum supported server |
Windows Server 2003 [desktop apps only] |
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Header |
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