tsigkeyring.py 1.7 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748
  1. # Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
  2. #
  3. # Permission to use, copy, modify, and distribute this software and its
  4. # documentation for any purpose with or without fee is hereby granted,
  5. # provided that the above copyright notice and this permission notice
  6. # appear in all copies.
  7. #
  8. # THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
  9. # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10. # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
  11. # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12. # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13. # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  14. # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15. """A place to store TSIG keys."""
  16. from dns._compat import maybe_decode, maybe_encode
  17. import base64
  18. import dns.name
  19. def from_text(textring):
  20. """Convert a dictionary containing (textual DNS name, base64 secret) pairs
  21. into a binary keyring which has (dns.name.Name, binary secret) pairs.
  22. @rtype: dict"""
  23. keyring = {}
  24. for keytext in textring:
  25. keyname = dns.name.from_text(keytext)
  26. secret = base64.decodestring(maybe_encode(textring[keytext]))
  27. keyring[keyname] = secret
  28. return keyring
  29. def to_text(keyring):
  30. """Convert a dictionary containing (dns.name.Name, binary secret) pairs
  31. into a text keyring which has (textual DNS name, base64 secret) pairs.
  32. @rtype: dict"""
  33. textring = {}
  34. for keyname in keyring:
  35. keytext = maybe_decode(keyname.to_text())
  36. secret = maybe_decode(base64.encodestring(keyring[keyname]))
  37. textring[keytext] = secret
  38. return textring