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update doc
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@ -358,7 +358,7 @@ this establishes the downstream keys.
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a: "a",
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c: [ list, of, encrypted, LCAR],
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l: encrypted frame for path creator,
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r: "<16 bytes rx hop>",
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t: "<16 bytes tx hop>",
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v: 0
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}
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@ -390,47 +390,44 @@ popped off and the last element filled with random.
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link relay upstream message (LRUM)
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sent to relay data via upstream direction of a previously created path.
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decrypt z using previously derived upstream key and nounce y. Relay with new_y
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and new_z in upstream direction as a LRUM.
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h = MDS(x, k_up)
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verify h == z[0:32]
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new_x = SD(k_up, y, x)
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new_y = y ^ new_x[0:24]
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new_z = z[32:] + RAND(32)
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{
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a: "u",
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p: "<16 bytes tx path id>",
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v: 0,
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x: "<insert N bytes payload here>",
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y: "<insert 24 bytes nounce here>",
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z: "<256 bytes rolling hmac>"
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x: "<N bytes encrypted x1 value>",
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y: "<32 bytes nonce>",
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z: "<discard>"
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}
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plaintext x1 is a routing message
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x1 = BD(SD(k_up, y[0:24], x))
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new_y = HS(y + k_up)
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verify new_y == x1.n
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in the event we get a path data message (PDM), transmit a LRUM to next hop
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{
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a: "u",
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p: x1.P,
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v: x1.V,
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x: x1.D,
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y: x1.N,
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z: RAND(x1.R)
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}
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if we are the farthest hop, process x1 as a routing message
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link relay downstream message (LRDM)
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sent to relay data via downstream direction of a previously created path.
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decrypt z using previously derived downstream key and nounce y. Relay with new_y
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and new_z in downstream direction as a LRUM.
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h = MDS(x, k_down)
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verify h == z[0:32]
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new_x = SD(k_down, y, x)
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new_y = y ^ new_x[0:24]
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new_z = z[32:] + RAND(32)
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same as LRUM but a is 'd' and p/x1.p refer to the rx path id
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{
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a: "d",
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p: "<16 bytes rx path id>",
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v: 0,
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x: "<insert N bytes payload here>",
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y: "<insert 24 bytes nounce here>",
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z: "<256 bytes rolling hmac>"
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}
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link relay exit message (LRXM)
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link relay exit message (LRXM) [under construction]
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sent to exit a previously commited path before it expires.
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verify signature using cancel key c in relay commit message.
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@ -503,6 +500,21 @@ originated from inside a LRDM.
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ipv4 addresses are allowed via ipv4 mapped ipv6 addresses, i.e. ::ffff.10.0.0.1
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path data message (PDM)
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intermediate path data
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forward N as LRUM if we got it in a LRUM
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forward N as LRDM if we got it in a LRDM
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{
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A: "D",
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D: "<N bytes payload here>",
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N: "<32 bytes next nonce>",
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P: "<16 bytes next path id>",
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R: number_of_bytes_Z_padding,
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V: 0
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}
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obtain exit address message (OXAM)
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sent to an exit router to obtain a NAT ip address for ip exit traffic.
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@ -564,8 +576,8 @@ signed data sent anonymously over the network to a recipiant from a sender.
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sent inside a TDFM encrypted to the hidden service's public encryption key.
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{
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A: "D",
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D: "<payload bytes>",
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A: "H",
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H: "<payload bytes>",
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I: Introducer for reply,
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R: SA of recipiant,
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S: SI of sender,
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