Developer Reference

Contents

RSA_Decrypt

Performs the RSA decryption operation.

Syntax

IppStatus ippsRSA_Decrypt(const IppsBigNumState*
pCtxt
, IppsBigNumState*
pPtxt
, const IppsRSAPrivateKeyState*
pKey
, Ipp8u*
pScratchBuffer
);
Include Files
ippcp.h
Parameters
pCtxt
Pointer to the
IppsBigNumState
context of the ciphertext.
pPtxt
Pointer to the
IppsBigNumState
context of the plaintext.
pKey
Pointer to the
IppsRSAPrivateKeyState
context.
pScratchBuffer
Pointer to the scratch buffer of size not less than returned by the
RSA_GetBufferSizePrivateKey
function.
Description
The function performs the RSA encryption operation, that is, the RSA operation on a private key.
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.
ippStsIncompleteContextErr
Indicates an error condition if the private key is not set up.
While you can set up the type 1 private key in a call to
RSA_SetPrivateKeyType1
, you can set up the type 2 private key in a call to either
RSA_SetPrivateKeyType2
or
RSA_GenerateKeys
.
ippStsOutOfRangeErr
Indicates an error condition if the big number specified by
pCtxt
is not positive or greater than the RSA modulus.
ippStsSizeErr
Indicates an error condition if the big number specified by
pPtxt
is not sufficient to hold the result.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.