Developer Guide and Reference for Intel® Integrated Performance Primitives Cryptography
RSA_MB_Verify_PSS_rmf
Performs RSA multi-buffer signature verification using RSASSA-PSS scheme.
Syntax
IppStatus ippsRSA_MB_Verify_PSS_rmf(const Ipp8u*pMsgs[8],const intmsgLens[8],const Ipp8u*pSignts[8],intpIsValid[8], const IppsRSAPublicKeyState*pPubKeys[8], const IppsHashMethod*pMethod, IppStatusstatuses[8], Ipp8u*pBuffer);
Include Files
ippcp.h
Parameters
| pMsgs[8] | Pointer to the array of messages that have been signed. | 
| msgLens[8] | Pointer to the array of messages lengths. | 
| pSignts[8] | Pointer to the array of signatures to be verified. | 
| pIsValid | Pointer to the array of verification results. | 
| pPubKeys[8] | Pointer to the array of preliminary initialized IppsRSAPublicKeyState contexts. | 
| pMethod | Pointer to the hash method. For details, see HashMethod functions. | 
| statuses[8] | Pointer to the array of execution statuses for each performed operation. | 
| pBuffer | Pointer to a temporary buffer. The size of the buffer must be not less than the value returned by the RSA_MB_GetBufferSizePublicKey function. | 
Description
This function carries out the RSASSA-PSS signature verification scheme defined in PKCS 1.2.1. The function can perform up to 8 verification operations at once.
Specify parameters for each single signature verification operation under the corresponding index in an input array in accordance with the ippsRSAVerify_PSS_rmf function API requirements.
To perform less than 8 operations, set one or more pointers to a context in input context arrays to NULL. In this case, each single operation with the context set to NULL will not be performed, and the function will return ippStsMbWarning . Once the function execution is completed, the statuses array will contain return codes for each single signature verification operation according to the ippsRSAVerify_PSS_rmf return values.
Important
- Sizes of all moduli n in all IppsRSAPublicKeyState contexts in the pPubKeys array must be equal.
- Sizes and values of all public exponents e in all IppsRSAPublicKeyState contexts in the pPubKeys array must be equal. 
Return Values
| ippStsNoErr | Indicates no error. All single operations executed without errors. Any other value indicates an error or warning. | 
| ippStsMbWarning | One or more of performed operations executed with error. Check statuses array for details. | 
| ippStsNullPtrErr | Any of the input parameters is a NULL pointer. | 
| ippStsSizeErr | Indicates a mismatch between moduli n sizes in the input contexts. | 
| ippStsBadArgErr | Indicates a mismatch between exponents e in public keys. | 
| ippStsContextMatchErr | No valid keys were found. | 
Related Information