Generates a signature using the v1.5 version of the RSA scheme with the SHA-256 message digest.
Syntax
IppStatus ippsRSASSASign_SHA256_PKCSv15 (const Ipp8u* pMsg, Ipp32u msgLen, Ipp8u* pSign, IppsRSAState* pRSA);
Parameters
pMsg |
Pointer to the plain message to be signed. |
msgLen |
Length of the message. The message can be empty, that is, msgLen==0. |
pSign |
Pointer to the output signature. |
pRSA |
Pointer to the properly initialized IppsRSAState context. |
Description
This function is declared in the ippcp.h file. The function computes the SHA-256 digest of the input message and generates the signature of the digest using the v1.5 version of the RSA scheme, defined in [PKCS 1.2.1].
Important
The length of the signature being generated equals the length of the RSA modulus, supplied with the IppsRSAState context. Make sure that pSign points to a buffer of the appropriate length.
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 RSA context parameter does not match the operation. |
ippStsInvalidCryptoKeyErr |
Indicates an error condition if the RSA context has not been properly set up for the operation. |
ippStsSizeErr |
Indicates an error condition if the length of the RSA modulus is too small (see details in [PKCS 1.2.1] ). |