RSAVerify_PSS¶
Carries out the RSA-SSA signature verification scheme.
Syntax¶
IppStatus ippsRSAVerify_PSS(const Ipp8u* pMsg, int msgLen, const Ipp8u* pSign, int* pIsSignValid, const IppsRSAPublicKeyState* pKey, IppHashAlgId hashAlg, Ipp8u* pBuffer);
IppStatus ippsRSAVerify_PSS_rmf(const Ipp8u* pMsg, int msgLen, const Ipp8u* pSign, int* pIsSignValid, const IppsRSAPublicKeyState* pKey, const IppsHashMethod* pMethod, Ipp8u* pBuffer);
Include Files¶
ippcp.h
Parameters¶
pMsg |
Pointer to the octet message that has been signed. |
msgLen |
Length in octets of the *pMsg message. |
pSign |
Pointer to the octet signature string to be verified. |
pIsSignValid |
Pointer to the verification result. |
pKey |
Pointer to the properly initialized IppsRSAPublicKeyState context. |
hashAlg |
Identifier of the hash algorithm. For details, see table Supported Hash Algorithms. |
pMethod |
Pointer to the hash method. For details, see HashMethod functions. |
pBuffer |
Pointer to the scratch buffer of size not less than returned by the RSA_GetBufferSizePublicKey function. |
Description¶
The function carries out the RSASSA-PSS signature verification scheme defined in [PKCS 1.2.1]. RSAVerify_PSS verifies the signature generated by the RSASign_PSS function called with the same hashAlg or pMethod parameter.
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 public key is not set up. |
ippsStsNotSupportedModeErr |
Indicates an error condition if the hashAlg parameter does not match any value of IppHashAlgId listed in table Supported Hash Algorithms. |
Related Information
RSA_SetPublicKey, RSA_SetPrivateKeyType1, RSA_SetPrivateKeyType2