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r14629@catbus: nickm | 2007-08-17 16:14:05 -0400

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spec clarification noted by Stefan K.


svn:r11152
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Nick Mathewson 2007-08-17 20:31:56 +00:00
parent 31668172ed
commit b60f4a4d16
1 changed files with 5 additions and 2 deletions
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7
doc/spec/tor-spec.txt
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@ -293,11 +293,14 @@ see tor-design.pdf.
The CircID for a CREATE cell is an arbitrarily chosen 2-byte integer,
selected by the node (OP or OR) that sends the CREATE cell. To prevent
CircID collisions, when one OR sends a CREATE cell to another OR, it chooses
CircID collisions, when one node sends a CREATE cell to another, it chooses
from only one half of the possible values based on the ORs' public
identity keys: if the sending OR has a lower key, it chooses a CircID with
identity keys: if the sending node has a lower key, it chooses a CircID with
an MSB of 0; otherwise, it chooses a CircID with an MSB of 1.
(An OP with no public key MAY choose any CircID it wishes, since an OP
never needs to process a CREATE cell.)
Public keys are compared numerically by modulus.
As usual with DH, x and y MUST be generated randomly.