NCryptVerifySignature function (ncrypt.h)
The NCryptVerifySignature function verifies that the specified signature matches the specified hash.
SECURITY_STATUS NCryptVerifySignature( [in] NCRYPT_KEY_HANDLE hKey, [in, optional] VOID *pPaddingInfo, [in] PBYTE pbHashValue, [in] DWORD cbHashValue, [in] PBYTE pbSignature, [in] DWORD cbSignature, [in] DWORD dwFlags );
The handle of the key to use to decrypt the signature. This must be an identical key or the public key portion of the key pair used to sign the data with the NCryptSignHash function.
[in, optional] pPaddingInfo
A pointer to a structure that contains padding information. The actual type of structure this parameter points to depends on the value of the dwFlags parameter. This parameter is only used with asymmetric keys and must be NULL otherwise.
The address of a buffer that contains the hash of the data. The cbHash parameter contains the size of this buffer.
The size, in bytes, of the pbHash buffer.
The address of a buffer that contains the signed hash of the data. The NCryptSignHash function is used to create the signature. The cbSignature parameter contains the size of this buffer.
The size, in bytes, of the pbSignature buffer. The NCryptSignHash function is used to create the signature.
Flags that modify function behavior. The allowed set of flags depends on the type of key specified by the hKey parameter.
If the key is a symmetric key, this parameter is not used and should be zero.
If the key is an asymmetric key, this can be one of the following values.
||The PKCS1 padding scheme was used when the signature was created. The pPaddingInfo parameter is a pointer to a BCRYPT_PKCS1_PADDING_INFO structure.|
||The Probabilistic Signature Scheme (PSS) padding scheme was used when the signature was created. The pPaddingInfo parameter is a pointer to a BCRYPT_PSS_PADDING_INFO structure.|
||Requests that the key service provider (KSP) not display any user interface. If the provider must display the UI to operate, the call fails and the KSP should set the NTE_SILENT_CONTEXT error code as the last error.|
Returns a status code that indicates the success or failure of the function.
Possible return codes include, but are not limited to, the following.
||The function was successful.|
||The signature was not verified.|
||The hKey parameter is not valid.|
||A memory allocation failure occurred.|
||The algorithm provider used to create the key handle specified by the hKey parameter is not a signing algorithm.|
A service must not call this function from its StartService Function. If a service calls this function from its StartService function, a deadlock can occur, and the service may stop responding.
|Minimum supported client||Windows Vista [desktop apps | UWP apps]|
|Minimum supported server||Windows Server 2008 [desktop apps | UWP apps]|