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.
Note
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. |
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. |
Note
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.
Related Information