Developer Reference

Contents

RSADecrypt_OAEP

Carries out the RSA-OAEP decryption scheme.

Syntax

IppStatus ippsRSADecrypt_OAEP(const Ipp8u*
pSrc
, const Ipp8u*
pLabel
, int
labLen
, Ipp8u*
pDst
, int*
pDstLen
, const IppsRSAPrivateKeyState*
pKey
, IppHashAlgId
hashAlg
, Ipp8u*
pBuffer
);
IppStatus ippsRSADecrypt_OAEP_rmf(const Ipp8u*
pSrc
, const Ipp8u*
pLabel
, int
labLen
, Ipp8u*
pDst
, int*
pDstLen
, const IppsRSAPrivateKeyState*
pKey
, const IppsHashMethod*
pMethod
, Ipp8u*
pBuffer
);
Include Files
ippcp.h
Parameters
pSrc
Pointer to the octet ciphertext to be decrypted.
pLabel
Pointer to the optional label to be associated with the message.
labLen
Length of the optional label.
pDst
Pointer to the output octet plaintext message.
pDstLen
Pointer to the length of the decrypted message.
pKey
Pointer to the properly initialized
IppsRSAPrivateKeyState
context.
hashAlg
ID of the hash algorithm used. For details, see table Supported Hash Algorithms.
pMethod
Pointer to the hash method. For details, see HashMethod functions.
pBuffer
Pointer to a temporary buffer of size not less than returned by the
RSA_GetBufferSizePrivateKey
function.
Description
The function carries out the RSA-OAEP decryption scheme defined in [PKCS 1.2.1]. The
*pDstLen
parameter returns the length of the decrypted message.
This function has a
reduced memory footprint
version. To learn more, see Reduced Memory Footprint Functions.
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
.
ippStsLengthErr
Indicates an error condition if the any input/output length parameters are inconsistent with one another.
ippStsNotSupportedModeErr
Indicates an error condition if the
hashAlg
parameter does not match any value of
IppHashAlgId
listed in table Supported Hash Algorithms.

Product and Performance Information

1

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