Cryptographic Token Interface Standard

PKCS#11

General-length AES-MAC

General-length AES-MAC, denoted CKM_AES_MAC_GENERAL, is a mechanism for single- and multiple-part signatures and verification, based on NIST Advanced Encryption Standard.

It has a parameter, a CK_MAC_GENERAL_PARAMS structure, which specifies the output length desired from the mechanism.

The output bytes from this mechanism are taken from the start of the final AES cipher block produced in the MACing process.

Constraints on key types and the length of data are summarized in the following table: 




 Table 95, General-length AES-MAC: Key And Data Length   
Function Key type 

Data length

 

Signature length

   


C_Sign AES 

any

 

0-block size, as specified in parameters

   


C_Verify AES 

any

 

0-block size, as specified in parameters

  

 



For this mechanism, the ulMinKeySize and ulMaxKeySize  fields of the CK_MECHANISM_INFO structure specify the supported range of AES key sizes, in bytes.


 
 



RSA Security Inc. Public-Key Cryptography Standards - 
PKCS#11 - v211