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CryptXmlOpenToDecode function

The CryptXmlOpenToDecode function opens an XML digital signature to decode and returns the handle of the document context that encapsulates a CRYPT_XML_SIGNATURE structure. The document context can include one or more Signature elements.

Syntax


HRESULT WINAPI CryptXmlOpenToDecode(
  _In_opt_  CRYPT_XML_TRANSFORM_CHAIN_CONFIG *pConfig,
  DWORD dwFlags,
  _In_      const CRYPT_XML_PROPERTY *rgProperty,
  ULONG cProperty,
  _In_      const CRYPT_XML_BLOB *pEncoded,
  HCRYPTXML phCryptXml
);

Parameters

pConfig [in, optional]

The handle of the transform chain engine. If this parameter is NULL, then a default engine will be used to apply transforms.

dwFlags

A DWORD value that controls which CryptXML extensions are loaded and whether the XML is serialized. This parameter can be one of the following values.

ValueMeaning
CRYPT_XML_FLAG_NO_SERIALIZE
0x80000000

Inhibit serialization.

Important  Do not set this flag when multiple threads are accessing a CryptXml object. Serialization ensures mutual exclusion when two or more threads attempt to simultaneously accept a CryptXml object or memory.

CRYPT_XML_FLAG_DISABLE_EXTENSIONS
0x10000000

Only default implementations for the signature and digest are used. When this flag is set, no other registered extensions are loaded.

 

rgProperty [in]

A pointer to an array of CRYPT_XML_PROPERTY structures that contain additional properties.

cProperty

The number of items in the array pointed to by the rgProperty parameter.

pEncoded [in]

A pointer to CRYPT_XML_BLOB structure that contains the signature to decode.

phCryptXml

The handle of a Document Context object. When you have finished using the handle, release it by passing it to the CryptXmlClose function.

Return value

If the function succeeds, the function returns zero.

If the function fails, it returns an HRESULT value that indicates the error.

Requirements

Minimum supported client

Windows 7 [desktop apps only]

Minimum supported server

Windows Server 2008 R2 [desktop apps only]

Header

Cryptxml.h

Library

Cryptxml.lib

DLL

Cryptxml.dll

 

 

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