CKM_DES3_RETAIL_CFB_MAC

Supported Operations

Encrypt and Decrypt	No
Sign and Verify	Yes
SignRecover and VerifyRecover	No
Digest	No
Generate Key/Key-Pair	No
Wrap and Unwrap	No
Derive	No
FIPS-approved	Yes

Key Size Range (bytes) and Parameters

Minimum	16
FIPS Minimum	16
Maximum	24
Parameter	8 bytes (IV)

Description

This is a signature generation and verification mechanism. The produced MAC is 8 bytes in length. It is an extension of the single length key MAC mechanisms.  It takes an 8 byte IV as a parameter, which is encrypted (ECB mode) with the left most key value before the first data block is MAC'ed.

The data, which must be a multiple of 8 bytes, is MAC’ed with the left most key value in the normal manner, but the final cipher block is then decrypted (ECB mode) with the middle key value and encrypted (ECB mode) with the Right most key part.

For double length DES keys, the Right key component is the same as the Left key component.

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