Mssign32.dll

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Windows Process Description:

The mssign32.dll file is included in the Cryptographic Service Provider (CSP)-a software library implementing the Cryptographic Application Programming Interface (CAPI) in Microsoft Windows. CSP has encoding and decoding functions, which computer application programs may use.

DLL Files in the CSP library, such as the file mssign32.dll, are implemented as a special type of DLL with special restrictions in terms of loading and use. For instance, the file mssign32.dll must be digitally signed by Microsoft and the signature is verified when Microsoft Windows loads the CSP. After loading, Windows re-scans the CSP to detect tampering, which could be done either by malicious software such as computer viruses and spyware or by the user itself. Lastly, the file mssign32.dll also acts as a pass-through layer that facilitates the communication between the Windows Operating System (OS) and the actual implementation of CSP.

The mssign32.dll file has numerous functions, first of which are DLLRegisterServer and DLLUnregisterServer. These two are for the creation and removal of registry entries for all classes supported in the sets of modules of the file mssign32.dll. The second set of functions of the file mssign32.dll is the FreeCryptProvFromCert and GetCryptProvFromCert, which releases and gets the private key, or simply referred to as a handle, to a CSP. The handle is used for authentication purposes and upon acquisition of this through the FreeCryptProvFromCert and GetCryptProvFromCert, a temporary container is created. This temporary container in turn is deleted by the PvkFreeCryptProv function, still a component of the file mssign32.dll. The said functions will only get to work if one creates a user defined header file and use the LoadLibrary and GetProcAddress functions to dynamically link to mssign32.dll.

The mssign32.dll file is also a requisite for certain DLL files such as capicom.dll to function. The latest downloadable version of the file mssign32.dll is 5.131.2600.0, measuring 35088 bytes.

Author: Microsoft Corporation

Author URL: http:// www.microsoft.com/

Part Of: Cryptographic Service Provider

Memory Usage: Low

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