Developer Reference

Contents

AESEncryptOFB

Encrypts a variable length data stream according to AES in the OFB mode.

Syntax

IppStatus ippsAESEncryptOFB (const Ipp8u*
pSrc
, Ipp8u*
pDst
, int
srclen
, int
ofbBlkSize
, const IppsAESSpec*
pCtx
, Ipp8u*
pIV
);
Include Files
ippcp.h
Parameters
pSrc
Pointer to the input plaintext data stream of variable length.
pDst
Pointer to the resulting ciphertext data stream.
srclen
Length of the plaintext data stream in bytes.
ofbBlkSize
Size of the OFB block in bytes.
pCtx
Pointer to the
IppsAESSpec
context.
pIV
Pointer to the initialization vector for the OFB mode operation.
Description
The function encrypts the input data stream of a variable length in the OFB mode as specified in [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 is
NULL
.
ippStsLengthErr
Indicates an error condition if the input data stream length is less than or equal to zero.
ippStsUnderRunErr
Indicates an error condition if
srclen
is not divisible by the
ofbBlkSize
parameter value.
ippStsOFBSizeErr
Indicates an error condition if the value of
ofbBlkSize
is illegal.
ippStsContextMatchErr
Indicates an error condition if the context parameter does not match the operation.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804