Cryptographic Token Interface Standard

PKCS#11

General-length SHA-1-HMAC

The general-length SHA-1-HMAC mechanism, denoted CKM_SHA_1_HMAC_GENERAL, is a mechanism for signatures and verification. It uses the HMAC construction, based on the SHA-1 hash function. The keys it uses are generic secret keys and CKK_SHA_1_HMAC.

It has a parameter, a CK_MAC_GENERAL_PARAMS, which holds the length in bytes of the desired output. This length should be in the range 0-20 (the output size of SHA-1 is 20 bytes). Signatures (MACs) produced by this mechanism will be taken from the start of the full 20-byte HMAC output. 




 Table 256, General-length SHA-1-HMAC: Key And Data Length   
Function Key type 

Data length

 

Signature length

   


C_Sign 

generic secret

 

any

 

0-20, depending on parameters

   


C_Verify 

generic secret

 

any

 

0-20, depending on parameters

  

 



 
 



RSA Security Inc. Public-Key Cryptography Standards - 
PKCS#11 - v230