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Diffstat (limited to 'spec/rend-spec/introduction-protocol.md')
| -rw-r--r-- | spec/rend-spec/introduction-protocol.md | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/spec/rend-spec/introduction-protocol.md b/spec/rend-spec/introduction-protocol.md index 02ed828..829ba98 100644 --- a/spec/rend-spec/introduction-protocol.md +++ b/spec/rend-spec/introduction-protocol.md @@ -505,7 +505,7 @@ EXT_FIELD_TYPE: ```text The EXT_FIELD content format is: - POW_VERSION [1 byte] + POW_SCHEME [1 byte] POW_NONCE [16 bytes] POW_EFFORT [4 bytes] POW_SEED [4 bytes] @@ -513,7 +513,7 @@ The EXT_FIELD content format is: where: -POW_VERSION is 1 for the protocol specified here +POW_SCHEME is 1 for the `v1` protocol specified here POW_NONCE is the nonce value chosen by the client's solver POW_EFFORT is the effort value chosen by the client, as a 32-bit integer in network byte order @@ -521,10 +521,14 @@ POW_SEED identifies which seed was in use, by its first 4 bytes POW_SOLUTION is a matching proof computed by the client's solver ``` -Only version 1 is currently defined. -Other versions may have a different format. -A correctly functioning client only submits solutions with a version and seed which were advertised by the server and have not yet expired. -An extension with an unknown version or expired seed is suspicious and SHOULD result in introduction failure. +Only SCHEME 1, `v1`, is currently defined. +Other schemes may have a different format, +after the POW_SCHEME byte. +A correctly functioning client only submits solutions with a scheme and seed which were advertised by the server +(using a "pow-params" Item in the +[HS descriptor](hsdesc-encrypt.md#second-layer-plaintext)) +and have not yet expired. +An extension with an unknown scheme or expired seed is suspicious and SHOULD result in introduction failure. Introduced in tor-0.4.8.1-alpha. |