Developer Reference

Contents

MD5Pack, MD5Unpack

Packs/unpacks the
IppsMD5State
context into/from a user-defined buffer (deprecated).

Syntax

IppStatus ippsMD5Pack (const IppsMD5State*
pCtx
, Ipp8u*
pBuffer
);
IppStatus ippsMD5Unpack (const Ipp8u*
pBuffer
, IppsMD5State*
pCtx
);
Include Files
ippcp.h
Parameters
pCtx
Pointer to the
IppsMD5State
context.
pBuffer
Pointer to the user-defined buffer.
Description
This algorithm is considered weak due to known attacks on it. The functionality remains in the library, but the implementation will no longer be optimized and no security patches will be applied.
The
MD5Pack
function transforms the
*pCtx
context to a position-independent form and stores it in the
*pBuffer
buffer. The
MD5Unpack
function performs the inverse operation, that is, transforms the contents of the
*pBuffer
buffer into a normal
IppsMD5State
context. The
MD5Pack
and
MD5Unpack
functions enable replacing the position-dependent
IppsMD5State
context in the memory.
Call the
MD5GetSize
function prior to
MD5Pack
/
MD5Unpack
to determine the size of the buffer.
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
.
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