nn::crypto::CtrDecryptor::Decrypt Member Function

static size_t Decrypt(
     void * pDst,
     size_t dstSize,
     const void * pSrc,
     size_t srcSize,
     const void * pIv,
     size_t ivSize,
     const BlockCipher & c
);

	Name	Description
out	pDst	Pointer to the buffer storing the decryption results.
in	dstSize	Size of the buffer pointed to by pDst.
in	pSrc	Pointer to the buffer storing the ciphertext.
in	srcSize	Ciphertext size in bytes.
in	pIv	Pointer to the buffer storing the IV.
in	ivSize	IV size in bytes.
in	c	Instance of the block cipher implementation used in decryption.

Returns the number of bytes written to pDst.

Handles batch decryption when in CTR mode.

When all data is loaded into memory, you can call this function to decrypt all of the data at once.

For c, specify the same key used in encryption for the block cipher of the same algorithm used in encryption.

Specify a pointer to an IV object in pIv, and its size in ivSize. You must specify the same IV value as the one used for encryption.

The function fails and displays an error if the size of the return value is larger than the buffer size specified in dstSize. Data is not written to the buffer beyond the size specified in dstSize. If the size of the return value is not larger than dstSize, the function indicates a successful completion and writes the size of the return value in pDst.

If this function fails, decryption cannot continue. You must then try again, starting by calling the Initialize function.

2011/10/27

Initial version.