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| author | Karsten Loesing <karsten.loesing@gmx.net> | 2008-08-04 12:44:14 +0000 |
|---|---|---|
| committer | Karsten Loesing <karsten.loesing@gmx.net> | 2008-08-04 12:44:14 +0000 |
| commit | d56cb9ec59729db8a77224003a764e1ece70677e (patch) | |
| tree | b75f920d9c3a34be16c0f9868ca2981dcc344c05 /proposals/121-hidden-service-authentication.txt | |
| parent | b7f5a34928a1189f16ca24655df6fbc264b756c5 (diff) | |
| download | torspec-d56cb9ec59729db8a77224003a764e1ece70677e.tar.gz torspec-d56cb9ec59729db8a77224003a764e1ece70677e.zip | |
Some tiny corrections to proposal 121.
svn:r16381
Diffstat (limited to 'proposals/121-hidden-service-authentication.txt')
| -rw-r--r-- | proposals/121-hidden-service-authentication.txt | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/proposals/121-hidden-service-authentication.txt b/proposals/121-hidden-service-authentication.txt index 4ec4c50..54d709a 100644 --- a/proposals/121-hidden-service-authentication.txt +++ b/proposals/121-hidden-service-authentication.txt @@ -499,7 +499,7 @@ Details: clients and distributes them outside of Tor. The suggested key size is 128 bits, so that descriptor cookies can be encoded in 22 base64 chars (which can hold up to 22 * 5 = 132 bits, leaving 4 bits to encode the - authorization type "1" and allow a client to distinguish this + authorization type (here: "0") and allow a client to distinguish this authorization protocol from others like the one proposed below). Typically, the contact information for a hidden service using this authorization protocol looks like this: @@ -524,12 +524,12 @@ Details: ### Here comes the voodoo I've conceived: ### ### ATYPE Authorization type: set to 1. [1 octet] - ### ALEN Number of authorized clients div 16 [1 octet] + ### ALEN Number of clients := 1 + ((clients - 1) div 16) [1 octet] ### for each symmetric descriptor cookie: ### ID Client ID: H(descriptor cookie | IV)[:4] [4 octets] ### SKEY Session key encrypted with descriptor cookie [16 octets] ### (end of client-specific part) - ### RND Random data [(16 - (number-of-clients mod 16)) * 20 octets] + ### RND Random data [(15 - ((clients - 1) mod 16)) * 20 octets] ### IV AES initialization vector [16 octets] ### IPOS Intro points, encrypted with session key [remaining octets] @@ -574,8 +574,8 @@ Details: created client key and descriptor cookie, he tells them to the client outside of Tor. The contact information string looks similar to the one used by the preceding authorization protocol (with the only difference - that it has "2" encoded as auth-type in the remaining 4 of 132 bits - instead of "1" as before). + that it has "1" encoded as auth-type in the remaining 4 of 132 bits + instead of "0" as before). When creating a hidden service descriptor for an authorized client, the hidden service uses the client key and descriptor cookie to compute |