ippsHashDRBG_EntropyInputCtxGetSize

ippsHashDRBG_EntropyInputCtxGetSize#

Gets the size (in bytes) for the Entropy input context.

Syntax#

IppStatus ippsHashDRBG_EntropyInputCtxGetSize(int* pEntrInputSize,
                                              const int entrInputBufBitsLen,
                                              const IppsHashMethod* pHashMethod);

Include Files#

ippcp.h

Parameters#

pEntrInputSize

Pointer to the Entropy input context size.

entrInputBufBitsLen

The length of the buffer containing the entropy input and the nonce. entrInputBufBitsLen must be at least equal to the minimum entropy input length specified in Minimum and maximum values for the Hash DRBG to accommodate both the entropy input and the nonce during instantiation.

pHashMethod

Pointer to the hash method (may be NULL).

Description#

Gets the size for the IppsHashDRBG_EntropyInputCtx.

The result is stored to *pEntrInputSize.

Note

If the hash method is not specified (NULL pointer is passed), SHA-256 is used by default.

Return Values#

ippStsNoErr

Indicates no error. All single operations executed without errors. Any other value indicates an error.

ippStsNullPtrErr

pEntrInputSize is a NULL pointer.

ippStsOutOfRangeErr

entrInputBufBitsLen < 1.

ippStsNotSupportedModeErr

The hash algorithm is not supported.

ippStsLengthErr

The length of the Entropy input buffer is less than the minimum entropy input length (see Minimum and maximum values for the Hash DRBG).
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