[GNUnet-SVN] [lsd0001] branch master updated: add txt

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martin-schanzenbach pushed a commit to branch master
in repository lsd0001.

The following commit(s) were added to refs/heads/master by this push:
     new debb299  add txt
debb299 is described below

commit debb299627e5aefcacf0d8129e51cf1abe5299be
Author: Schanzenbach, Martin <address@hidden>
AuthorDate: Mon Sep 9 22:05:59 2019 +0200

    add txt
---
 draft-schanzen-gns.txt | 110 +++++++++++++++++++++++++++++++++++++------------
 1 file changed, 83 insertions(+), 27 deletions(-)

diff --git a/draft-schanzen-gns.txt b/draft-schanzen-gns.txt
index 1eadf6a..af0fbc7 100644
--- a/draft-schanzen-gns.txt
+++ b/draft-schanzen-gns.txt
@@ -69,11 +69,11 @@ Table of Contents
      2.4.  Serialization format  . . . . . . . . . . . . . . . . . .   5
      2.5.  Internationalization and Character Encoding . . . . . . .   5
      2.6.  Security Considerations . . . . . . . . . . . . . . . . .   5
-   3.  Record Resolution . . . . . . . . . . . . . . . . . . . . . .   5
-   4.  Namespace Revocation  . . . . . . . . . . . . . . . . . . . .   5
-   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
-   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   5
-   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   5
+   3.  Record Resolution . . . . . . . . . . . . . . . . . . . . . .   6
+   4.  Namespace Revocation  . . . . . . . . . . . . . . . . . . . .   6
+   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
+   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   6
+   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   6
 
 1.  Introduction
 
@@ -114,7 +114,7 @@ Schanzenbach             Expires 24 January 2020            
    [Page 2]
 Internet-Draft             The GNU Name System                 July 2019
 
 
-               0     1     2     3     4     5     6     7
+               0     8     16    24    32    40    48    56
                +-----+-----+-----+-----+-----+-----+-----+-----+
                |                   SIGNATURE                   |
                |                                               |
@@ -157,10 +157,10 @@ Internet-Draft             The GNU Name System            
     July 2019
 
 2.1.1.  GNS record block data cryptography
 
-   Given a GNS record block a symmetric key "k" is used to en-/decrypt
-   "BDATA".  The key is derived from the record label "l" and the public
-   key "P".  Both "l" and "P" are implicity known by the GNS resolver.
-   "k" is a 256-bit AES key which is derived as follows.
+   Given a GNS record block a symmetric encryption scheme is used to
+   en-/decrypt "BDATA".  The keys are derived from the record label "l"
+   and the public key "P".  Both "l" and "P" are implicity known by the
+   GNS resolver.  The key material "K" is derived as follows:
 
 
 
@@ -172,13 +172,29 @@ Internet-Draft             The GNU Name System            
     July 2019
 
                h := SHA512 (l,P)
                d := h*x mod n
-               k := HKDF (P,l)
+               K := HKDF (P,l)
 
    "HKDF" is a hash-based key derivation function as defined in
    [RFC5869].  For the XTR, we use HMAC-SHA512 and HMAC-SHA256 in PRF as
-   proposed in (paper).  Using this HKDF, we derive two symmetric AES
-   keys "Ka,Kt" from the public key "P" and the record label "l".  The
-   two symmetric keys are used for a AES+TWOFISH combined cipher:
+   proposed in (paper).  Using this HKDF, we derive two symmetric
+   256-bit keys "Ka,Kt" from "K":
+
+               0     8     16    24    32    40    48    56
+               +-----+-----+-----+-----+-----+-----+-----+-----+
+               |                    AES KEY                    |
+               |                                               |
+               |                                               |
+               |                                               |
+               +-----+-----+-----+-----+-----+-----+-----+-----+
+               |                  TWOFISH KEY                  |
+               |                                               |
+               |                                               |
+               |                                               |
+               +-----+-----+-----+-----+-----+-----+-----+-----+
+
+                                  Figure 2
+
+   The two symmetric keys are used for a AES+TWOFISH combined cipher:
 
                RDATA := TWOFISH256(Kt, AES256(Ka, BDATA))
 
@@ -186,7 +202,31 @@ Internet-Draft             The GNU Name System             
    July 2019
 
    The RDATA consist of one or more entries in the following format:
 
-               0     1     2     3     4     5     6     7
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Schanzenbach             Expires 24 January 2020                [Page 4]
+
+Internet-Draft             The GNU Name System                 July 2019
+
+
+               0     8     16    24    32    40    48    56
                +-----+-----+-----+-----+-----+-----+-----+-----+
                |                   EXPIRATION                  |
                +-----+-----+-----+-----+-----+-----+-----+-----+
@@ -204,11 +244,11 @@ Internet-Draft             The GNU Name System            
     July 2019
                |                                               |
                +-----+-----+-----+-----+-----+-----+-----+-----+
 
-                                  Figure 2
+                                  Figure 3
 
    The a PKEY DATA entry has the following format:
 
-               0     1     2     3     4     5     6     7
+               0     8     16    24    32    40    48    56
                +-----+-----+-----+-----+-----+-----+-----+-----+
                |                   PUBLIC KEY                  |
                |                                               |
@@ -216,15 +256,7 @@ Internet-Draft             The GNU Name System             
    July 2019
                |                                               |
                +-----+-----+-----+-----+-----+-----+-----+-----+
 
-                                  Figure 3
-
-
-
-
-Schanzenbach             Expires 24 January 2020                [Page 4]
-
-Internet-Draft             The GNU Name System                 July 2019
-
+                                  Figure 4
 
 2.3.  Examples
 
@@ -242,6 +274,14 @@ Internet-Draft             The GNU Name System             
    July 2019
 
    TODO
 
+
+
+
+Schanzenbach             Expires 24 January 2020                [Page 5]
+
+Internet-Draft             The GNU Name System                 July 2019
+
+
 3.  Record Resolution
 
    TODO
@@ -277,4 +317,20 @@ Author's Address
 
 
 
-Schanzenbach             Expires 24 January 2020                [Page 5]
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Schanzenbach             Expires 24 January 2020                [Page 6]

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