C# Class Internal.NativeCrypto.CapiHelper

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Public Methods

Method	Description
CryptAcquireContext ( System.Security.Cryptography.SafeProvHandle &psafeProvHandle, string pszContainer, string pszProvider, int dwProvType, uint dwFlags ) : bool	Acquire a handle to a crypto service provider and optionally a key container
CryptDestroyHash ( IntPtr hHash ) : bool	Destroy a crypto hash.
CryptDestroyKey ( IntPtr hKey ) : bool	Destroy a crypto key.
CryptReleaseContext ( IntPtr safeProvHandle, int dwFlags ) : bool	Destroy a crypto provider.
GetProviderParameter ( System.Security.Cryptography.SafeProvHandle safeProvHandle, int keyNumber, int keyParam ) : object	This method queries the key container and get some of it's properties. Those properties should never cause UI to display.
NameOrOidToHashAlgId ( String nameOrOid ) : int	Helper for signing and verifications that accept a string to specify a hashing algorithm.
ObjToHashAlgId ( Object hashAlg ) : int	Helper for signing and verifications that accept a string/Type/HashAlgorithm to specify a hashing algorithm.
OpenCSP ( CspParameters cspParameters, uint flags, System.Security.Cryptography.SafeProvHandle &safeProvHandle ) : int	OpenCSP performs the core work of opening and creating CSPs and containers in CSPs
SignValue ( System.Security.Cryptography.SafeProvHandle hProv, SafeKeyHandle hKey, int keyNumber, int calgKey, int calgHash, byte hash ) : byte[]	Helper for RSACryptoServiceProvider.SignData/SignHash apis.
UpgradeRSA ( int dwProvType, string wszProvider ) : string	Check to see if a better CSP than the one requested is available RSA providers are supersets of each other in the following order: 1. MS_ENH_RSA_AES_PROV 2. MS_ENHANCED_PROV 3. MS_DEF_PROV This will return the best provider which is a superset of wszProvider, or NULL if there is no upgrade available on the machine.
VerifySign ( System.Security.Cryptography.SafeProvHandle hProv, SafeKeyHandle hKey, int calgKey, int calgHash, byte hash, byte signature ) : bool	Helper for RSACryptoServiceProvider.VerifyData/VerifyHash apis.

Private Methods

Method	Description
AcquireCryptContext ( System.Security.Cryptography.SafeProvHandle &safeProvHandle, string keyContainer, string providerName, int providerType, uint flags ) : int	Acquire a handle to a crypto service provider and optionally a key container This function implements the WszCryptAcquireContext_SO_TOLERANT
AcquireCsp ( CspParameters cspParameters, System.Security.Cryptography.SafeProvHandle &safeProvHandle ) : void	This method opens the CSP using CRYPT_VERIFYCONTEXT KeyContainer must be null for the flag CRYPT_VERIFYCONTEXT This method asserts if keyContainer is not null
CreateCSP ( CspParameters parameters, bool randomKeyContainer, System.Security.Cryptography.SafeProvHandle &safeProvHandle ) : void	Creates a new key container
CreateHashHandle ( this hProv, byte hash, int calgHash ) : SafeHashHandle	Create a CAPI-1 hash handle that contains the specified bits as its hash value.
CreateProvHandle ( CspParameters parameters, bool randomKeyContainer ) : System.Security.Cryptography.SafeProvHandle	This method acquires CSP and returns the handle of CSP
DecryptData ( SafeKeyHandle hKey, byte input, int inputOffset, int inputCount, byte output, int outputOffset, int outputCount ) : int
DecryptKey ( SafeKeyHandle safeKeyHandle, byte encryptedData, int encryptedDataLength, bool fOAEP, byte &decryptedData ) : void
EncryptData ( SafeKeyHandle hKey, byte input, int inputOffset, int inputCount, byte output, int outputOffset, int outputCount, bool isFinal ) : int
EncryptKey ( SafeKeyHandle safeKeyHandle, byte pbKey, int cbKey, bool foep, byte &pbEncryptedKey ) : void
ExponentAsBytes ( uint exponent ) : byte[]	Helper for converting a UInt32 exponent to bytes.
ExportKeyBlob ( bool includePrivateParameters, SafeKeyHandle safeKeyHandle ) : byte[]	Helper for Export CSP
GenerateKey ( System.Security.Cryptography.SafeProvHandle safeProvHandle, int algID, int flags, uint keySize, SafeKeyHandle &safeKeyHandle ) : int	Generates the key if provided CSP handle is valid
GetAlgIdFromOid ( string oid, OidGroup oidGroup ) : int	Convert an OID into a CAPI-1 CALG ID.
GetDefaultProvider ( int dwType ) : string	Find the default provider name to be used in the case that we were not actually passed in a provider name. The main purpose of this code is really to deal with the enhanced/default provider problems given to us by CAPI.
GetErrorCode ( ) : int	Wrapper for get last error function
GetKeyPairHelper ( CspAlgorithmType keyType, CspParameters parameters, int keySize, System.Security.Cryptography.SafeProvHandle safeProvHandle ) : SafeKeyHandle	Helper function to get the key pair
GetKeyParameter ( SafeKeyHandle safeKeyHandle, int keyParam ) : byte[]	Method helps get the different key properties
GetPersistKeyInCsp ( System.Security.Cryptography.SafeProvHandle safeProvHandle ) : bool	Returns PersistKeyInCsp value
GetProviderParameterWorker ( System.Security.Cryptography.SafeProvHandle safeProvHandle, byte impType, int &cb, CryptGetProvParam flags ) : int	This method helps reduce the duplicate code in the GetProviderParameter method
GetUserKey ( System.Security.Cryptography.SafeProvHandle safeProvHandle, int keySpec, SafeKeyHandle &safeKeyHandle ) : int	Retrieves the handle for user public / private key pair.
ImportKeyBlob ( System.Security.Cryptography.SafeProvHandle saveProvHandle, CspProviderFlags flags, bool addNoSaltFlag, byte keyBlob, SafeKeyHandle &safeKeyHandle ) : void	Helper for Import CSP
IsFlagBitSet ( uint dwImp, uint flag ) : bool	This method validates the flag bits set or not. Only works for flags with just one bit set
MapCspKeyFlags ( int flags ) : int	Maps CspProviderFlags enumeration into CAPI flags.
MapCspProviderFlags ( int flags ) : uint	Maps CspProviderFlags enumeration into CAPI flags
ObjToHashAlgorithm ( Object hashAlg ) : HashAlgorithm
ReadReversed ( this br, int count ) : byte[]	Read in a byte array in reverse order.
SaveCspParameters ( CspAlgorithmType keyType, CspParameters userParameters, CspProviderFlags defaultFlags, bool &randomKeyContainer ) : CspParameters	Helper method to save the CSP parameters.
SetKeyParameter ( SafeKeyHandle safeKeyHandle, CryptGetKeyParamQueryType keyParam, byte value ) : void	Set a key property which is based on byte[]
SetKeyParameter ( SafeKeyHandle safeKeyHandle, CryptGetKeyParamQueryType keyParam, int value ) : void	Set a key property which is based on int
SetPersistKeyInCsp ( System.Security.Cryptography.SafeProvHandle safeProvHandle, bool fPersistKeyInCsp ) : void	Sets the PersistKeyInCsp
ToKeyBlob ( this rsaParameters, int algId ) : byte[]	Helper for RsaCryptoServiceProvider.ImportParameters()
ToPlainTextKeyBlob ( int algId, byte rawKey ) : byte[]	Helper for RC2CryptoServiceProvider and DESCryptoServiceProvider
ToRSAParameters ( this cspBlob, bool includePrivateParameters ) : RSAParameters	Helper for RsaCryptoServiceProvider.ExportParameters()
ValidateCspFlags ( CspProviderFlags flags ) : void	Validates the CSP flags are expected
VerifyValidHandle ( System.Security.Cryptography.SafeHandleZeroOrMinusOneIsInvalid handle ) : void	This method checks if the handle is invalid then it throws error
WriteKeyBlobHeader ( int algId, BinaryWriter bw ) : void
WriteReversed ( this bw, byte bytes ) : void	Write out a byte array in reverse order.

Method Details

CryptAcquireContext() public static method

Acquire a handle to a crypto service provider and optionally a key container

public static CryptAcquireContext ( System.Security.Cryptography.SafeProvHandle &psafeProvHandle, string pszContainer, string pszProvider, int dwProvType, uint dwFlags ) : bool
psafeProvHandle	System.Security.Cryptography.SafeProvHandle
pszContainer	string
pszProvider	string
dwProvType	int
dwFlags	uint
return	bool

CryptDestroyHash() public static method

Destroy a crypto hash.

public static CryptDestroyHash ( IntPtr hHash ) : bool
hHash	System.IntPtr
return	bool

CryptDestroyKey() public static method

Destroy a crypto key.

public static CryptDestroyKey ( IntPtr hKey ) : bool
hKey	System.IntPtr
return	bool

CryptReleaseContext() public static method

Destroy a crypto provider.

public static CryptReleaseContext ( IntPtr safeProvHandle, int dwFlags ) : bool
safeProvHandle	System.IntPtr
dwFlags	int
return	bool

GetProviderParameter() public static method

This method queries the key container and get some of it's properties. Those properties should never cause UI to display.

public static GetProviderParameter ( System.Security.Cryptography.SafeProvHandle safeProvHandle, int keyNumber, int keyParam ) : object
safeProvHandle	System.Security.Cryptography.SafeProvHandle
keyNumber	int
keyParam	int
return	object

NameOrOidToHashAlgId() public static method

Helper for signing and verifications that accept a string to specify a hashing algorithm.

public static NameOrOidToHashAlgId ( String nameOrOid ) : int
nameOrOid	String
return	int

ObjToHashAlgId() public static method

Helper for signing and verifications that accept a string/Type/HashAlgorithm to specify a hashing algorithm.

public static ObjToHashAlgId ( Object hashAlg ) : int
hashAlg	Object
return	int

OpenCSP() public static method

OpenCSP performs the core work of opening and creating CSPs and containers in CSPs

public static OpenCSP ( CspParameters cspParameters, uint flags, System.Security.Cryptography.SafeProvHandle &safeProvHandle ) : int
cspParameters	System.Security.Cryptography.CspParameters
flags	uint
safeProvHandle	System.Security.Cryptography.SafeProvHandle
return	int

SignValue() public static method

Helper for RSACryptoServiceProvider.SignData/SignHash apis.

public static SignValue ( System.Security.Cryptography.SafeProvHandle hProv, SafeKeyHandle hKey, int keyNumber, int calgKey, int calgHash, byte hash ) : byte[]
hProv	System.Security.Cryptography.SafeProvHandle
hKey	SafeKeyHandle
keyNumber	int
calgKey	int
calgHash	int
hash	byte
return	byte[]

UpgradeRSA() public static method

Check to see if a better CSP than the one requested is available RSA providers are supersets of each other in the following order: 1. MS_ENH_RSA_AES_PROV 2. MS_ENHANCED_PROV 3. MS_DEF_PROV This will return the best provider which is a superset of wszProvider, or NULL if there is no upgrade available on the machine.

public static UpgradeRSA ( int dwProvType, string wszProvider ) : string
dwProvType	int	Provider type
wszProvider	string	Provider name
return	string

VerifySign() public static method

Helper for RSACryptoServiceProvider.VerifyData/VerifyHash apis.

public static VerifySign ( System.Security.Cryptography.SafeProvHandle hProv, SafeKeyHandle hKey, int calgKey, int calgHash, byte hash, byte signature ) : bool
hProv	System.Security.Cryptography.SafeProvHandle
hKey	SafeKeyHandle
calgKey	int
calgHash	int
hash	byte
signature	byte
return	bool