RSAVerify_PKCS1v15¶
Carries out the RSA-SSAsignature verification scheme of PKCS#1 v1.5.
Syntax¶
IppStatus ippsRSAVerify_PKCS1v15(const Ipp8u* pMsg, int msgLen, const Ipp8u* pSign, int* pIsSignValid, const IppsRSAPublicKeyState* pKey, IppHashAlgId hashAlg, Ipp8u* pBuffer);
IppStatus ippsRSAVerify_PKCS1v15_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 message that has been signed. |
msgLen |
Length of the message *pMsg in octets. |
pSign |
Pointer to the 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 a temporary buffer of size not less than returned by the RSA_GetBufferSizePublicKey function. |
Description¶
The function verifies the signature generated by the RSASign_PKCS1v15 function that uses the same hashAlg or pMethod parameter against the input message, as defined [PKCS 1.2.1].
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. |
ippStsLengthErr |
Indicates an error condition if any input/output length parameters are inconsistent with one another. |
ippsStsNotSupportedModeErr |
Indicates an error condition if the hashAlg parameter does not match any value of IppHashAlgId listed in table Supported Hash Algorithms. |
Note
You can set up the public key in a call to RSA_SetPublicKey.
Related Information
RSA_SetPublicKey, RSA_SetPrivateKeyType1, RSA_SetPrivateKeyType2