Required files
- net/ssh/transport/key_expander
- net/ssh/transport/hmac/md5
- net/ssh/transport/hmac/md5_96
- net/ssh/transport/hmac/sha1
- net/ssh/transport/hmac/sha1_96
- net/ssh/transport/hmac/sha2_256
- net/ssh/transport/hmac/sha2_256_96
- net/ssh/transport/hmac/sha2_512
- net/ssh/transport/hmac/sha2_512_96
- net/ssh/transport/hmac/ripemd160
- net/ssh/transport/hmac/none