SKIPJACK-OFB64

SKIPJACK-OFB64, denoted CKM_SKIPJACK_OFB64, is a mechanism for single- and multiple-part encryption and decryption with SKIPJACK in 64-bit output feedback mode as defined in FIPS PUB 185.

It has a parameter, a 24-byte initialization vector. During an encryption operation, this IV is set to some value generated by the token"in other words, the application cannot specify a particular IV when encrypting. It can, of course, specify a particular IV when decrypting.

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

Table 87, SKIPJACK-OFB64: Data and Length
Function Key type Input length Output length Comments

C_Encrypt SKIPJACK multiple of 8 same as input length no final part

C_Decrypt SKIPJACK multiple of 8 same as input length no final part

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

Function	Key type	Input length	Output length	Comments
C_Encrypt	SKIPJACK	multiple of 8	same as input length	no final part
C_Decrypt	SKIPJACK	multiple of 8	same as input length	no final part