CryptHashData.md

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Function name : CryptHashData

Group: Cryptography Reference - Library: advapi32

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Adds data to a specified hash object.

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Code examples:

How to create MD-5 and SHA-1 hash values from a string
A class that encrypts and decrypts files using Cryptography API Functions

Declaration:

BOOL WINAPI CryptHashData(
	HCRYPTHASH hHash,
	BYTE* pbData,
	DWORD dwDataLen,
	DWORD dwFlags
);  

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FoxPro declaration:

DECLARE INTEGER CryptHashData IN advapi32;
	INTEGER  hHash,;
	STRING @ pbData,;
	LONG     dwDataLen,;
	LONG     dwFlags
  

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Parameters:

hHash [in] Handle of the hash object.

pbData [in] Pointer to a buffer containing the data to be added to the hash object.

dwDataLen [in] Number of bytes of data to be added. This must be zero if the CRYPT_USERDATA flag is set.

dwFlags [in] Ignore.

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Return value:

If the function succeeds, the return value is TRUE.

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Comments:

This function and CryptHashSessionKey can be called multiple times to compute the hash of long or discontinuous data streams.

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