Cryptographic Token Interface Standard

PKCS#11

DSA with SHA-1

The DSA with SHA-1 mechanism, denoted CKM_DSA_SHA1, is a mechanism for single- and multiple-part signatures and verification based on the Digital Signature Algorithm defined in FIPS PUB 186. This mechanism computes the entire DSA specification, including the hashing with SHA-1.

For the purposes of this mechanism, a DSA signature is a 40-byte string, corresponding to the concatenation of the DSA values r and s, each represented most-significant byte first.

This mechanism does not have a parameter.

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




 Table 64, DSA with SHA-1: Key And Data Length   
Function Key type 

Input length

 

Output length

   


C_Sign DSA private key 

any

 

40

   


C_Verify DSA public key 

any, 402

 

N/A

  

 



2 Data length, signature length.


For this mechanism, the ulMinKeySize and ulMaxKeySize  fields of the CK_MECHANISM_INFO structure specify the supported range of DSA prime sizes, in bits.


 
 



RSA Security Inc. Public-Key Cryptography Standards - 
PKCS#11 - v210