WTHelperCertCheckValidSignature function
[The WTHelperCertCheckValidSignature function is available for use in the operating systems specified in the Requirements section. It may be altered or unavailable in subsequent versions. For certificate verification, use the CertGetCertificateChain and CertVerifyCertificateChainPolicy functions. For Microsoft Authenticode technology signature verification, use the .NET Framework.]
Applies to: desktop apps only
The WTHelperCertCheckValidSignature function checks whether a signature is valid. It can be used by trust providers to get an initial assessment of the validity of a signature before calling the function pointed to by the pfnFinalPolicy member of a CRYPT_PROVIDER_FUNCTIONS structure.
Syntax
HRESULT WINAPI WTHelperCertCheckValidSignature( CRYPT_PROVIDER_DATA *pProvData );
Parameters
- pProvData
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A pointer to the CRYPT_PROVIDER_DATA structure that contains the signer and countersigner information.
Return value
If the function succeeds, the function returns S_OK.
If the function fails, it returns an HRESULT value that indicates the error. For a list of possible error values, see WinVerifyTrust.
Requirements
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Minimum supported client | Windows Vista, Windows XP with SP2 |
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Minimum supported server | Windows Server 2003 |
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Header |
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Library |
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Build date: 3/6/2012
