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[or-cvs] correct the key material paragraph
Update of /home2/or/cvsroot/tor/doc
In directory moria:/home/arma/work/onion/cvs/tor/doc
Modified Files:
tor-spec.txt
Log Message:
correct the key material paragraph
Index: tor-spec.txt
===================================================================
RCS file: /home2/or/cvsroot/tor/doc/tor-spec.txt,v
retrieving revision 1.109
retrieving revision 1.110
diff -u -p -d -r1.109 -r1.110
--- tor-spec.txt 5 Jan 2006 21:32:33 -0000 1.109
+++ tor-spec.txt 7 Jan 2006 02:05:22 -0000 1.110
@@ -268,12 +268,12 @@ when do we rotate which keys (tls, link,
If CREATE_FAST is used, the client and server base their key material on
K0=X|Y.
- From the base key material g^xy, they compute derivative key material as
- follows. Next, the server computes 100 bytes of key data as K = SHA1(K0
- | [00]) | SHA1(K0 | [01]) | ... SHA1(K0 | [04]) where "00" is a single
- octet whose value is zero, [01] is a single octet whose value is one, etc.
- The first 20 bytes of K form KH, bytes 21-40 form the forward digest Df,
- 41-60 form the backward digest Db, 61-76 form Kf, and 77-92 form Kb.
+ From the base key material K0, they compute 100 bytes of derivative
+ key data as K = SHA1(K0 | [00]) | SHA1(K0 | [01]) | ... SHA1(K0 |
+ [04]) where "00" is a single octet whose value is zero, [01] is a
+ single octet whose value is one, etc. The first 20 bytes of K form
+ KH, bytes 21-40 form the forward digest Df, 41-60 form the backward
+ digest Db, 61-76 form Kf, and 77-92 form Kb.
KH is used in the handshake response to demonstrate knowledge of the
computed shared key. Df is used to seed the integrity-checking hash