AESDecryptCTR
AESDecryptCTR
Decrypts a variable length data stream in the CTR mode.
Syntax
IppStatus ippsAESDecryptCTR(const Ipp8u
* pSrc
, Ipp8u
* pDst
, int
srcLen
,
const
IppsAESSpec
* pCtx
, Ipp8u
* pCtrValue
, int
ctrNumBitSize
);
Include Files
ippcp.h
Parameters
- pSrc
- Pointer to the input ciphertext data stream.
- pDst
- Pointer to the resulting plaintext data stream of a variable length.
- srcLen
- Length of the plaintext data stream in bytes.
- pCtx
- Pointer to theIppsAESSpeccontext.
- pCtrValue
- Pointer to the counter data block.
- ctrNumBitSize
- Number of bits in the specific part of the counter to be incremented.
Description
The function decrypts the input data stream of a variable length according to the CTR mode as specified in the [NIST SP 800-38A].
Return Values
- ippStsNoErr
- Indicates no error. Any other value indicates an error or warning.
- ippStsNullPtrErr
- Indicates an error condition if any of the specified pointers isNULL.
- ippStsLengthErr
- Indicates an error condition if the output data stream length is less than or equal to zero.
- ippStsCTRSizeErr
- Indicates an error condition if the value of thectrNumBitSizeis illegal.
- ippStsContextMatchErr
- Indicates an error condition if the context parameter does not match the operation.