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BCryptSetContextFunctionProperty function (bcrypt.h)

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The BCryptSetContextFunctionProperty function sets the value of a named property for a cryptographic function in an existing CNG context.

Syntax

NTSTATUS BCryptSetContextFunctionProperty(
  [in] ULONG   dwTable,
  [in] LPCWSTR pszContext,
  [in] ULONG   dwInterface,
  [in] LPCWSTR pszFunction,
  [in] LPCWSTR pszProperty,
  [in] ULONG   cbValue,
  [in] PUCHAR  pbValue
);

Parameters

[in] dwTable

Identifies the configuration table that the context exists in. This can be one of the following values.

Value Meaning
CRYPT_LOCAL
 The context exists in the local-machine configuration table.
CRYPT_DOMAIN
 This value is not available for use.

[in] pszContext

A pointer to a null-terminated Unicode string that contains the identifier of the context to set the function property in.

[in] dwInterface

Identifies the cryptographic interface that the function exists in. This can be one of the following values.

Value Meaning
BCRYPT_ASYMMETRIC_ENCRYPTION_INTERFACE
 The function exists in the list of asymmetric encryption functions.
BCRYPT_CIPHER_INTERFACE
 The function exists in the list of cipher functions.
BCRYPT_HASH_INTERFACE
 The function exists in the list of hash functions.
BCRYPT_RNG_INTERFACE
 The function exists in the list of random number generator functions.
BCRYPT_SECRET_AGREEMENT_INTERFACE
 The function exists in the list of secret agreement functions.
BCRYPT_SIGNATURE_INTERFACE
 The function exists in the list of signature functions.
NCRYPT_KEY_STORAGE_INTERFACE
 The function exists in the list of key storage functions.
NCRYPT_SCHANNEL_INTERFACE
 The function exists in the list of Schannel functions.

[in] pszFunction

A pointer to a null-terminated Unicode string that contains the identifier of the cryptographic function to set the property for.

[in] pszProperty

A pointer to a null-terminated Unicode string that contains the identifier of the property to set.

[in] cbValue

Contains the size, in bytes, of the pbValue buffer. This is the exact number of bytes that will be stored. If the property value is a string, you should add the size of one character to also store the terminating null character, if needed.

[in] pbValue

The address of a buffer that contains the new property value.

Return value

Returns a status code that indicates the success or failure of the function.

Possible return codes include, but are not limited to, the following.

Return code Description
STATUS_SUCCESS
 The function was successful.
STATUS_ACCESS_DENIED
 The caller does not have write access to the properties for the function.
STATUS_INVALID_PARAMETER
 One or more parameters are not valid.
STATUS_NO_MEMORY
 A memory allocation failure occurred.
STATUS_NOT_FOUND
 The specified context or function could not be found.

Remarks

BCryptSetContextFunctionProperty can be called only in user mode.

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Target Platform Windows
Header bcrypt.h
Library Bcrypt.lib
DLL Bcrypt.dll