Documentation
# DES-OFB1
# From FIPS Pub 81 Appendix E


# OFB1-DES.Encrypt and OFB1-DES.Decrypt 
Klen = 8
Ilen = 8
Len = 3
Key = 0123456789abcdef
IV = 1234567890abcdef
# 010011100110111101110111
Plaintext = 4e6f77
# 111000111101001101001011
Ciphertext = e3d34b