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| author | Vsevolod Stakhov <vsevolod@highsecure.ru> | 2020-06-21 20:30:54 +0100 |
|---|---|---|
| committer | Vsevolod Stakhov <vsevolod@highsecure.ru> | 2020-06-21 20:49:57 +0100 |
| commit | 456198fdac726db604d2bbab85a0668b5c9dfa83 (patch) | |
| tree | 2fccf36ec3aec8c8b62329bae6c4df603c57f050 | |
| parent | f9e8c237c7a723746bc6b19360ed56e199df9e8f (diff) | |
| download | rspamd-456198fdac726db604d2bbab85a0668b5c9dfa83.tar.gz rspamd-456198fdac726db604d2bbab85a0668b5c9dfa83.zip | |
[Rules] More fixes for bitcoin cash addresses decoding
| -rw-r--r-- | rules/bitcoin.lua | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/rules/bitcoin.lua b/rules/bitcoin.lua index b7f9f1dbc..4331d8382 100644 --- a/rules/bitcoin.lua +++ b/rules/bitcoin.lua @@ -145,7 +145,13 @@ local function is_segwit_bech32_address(word) if decoded then local bytes = decoded:bytes() - if bytes[1] == 0 then + -- The version byte’s most signficant bit is reserved and must be 0. + -- The 4 next bits indicate the type of address and the 3 least significant bits indicate the size of the hash. + local version = bit.band(bytes[1], 128) + local addr_type = bit.rshift(bit.band(bytes[1], 120), 3) + local _ = bit.band(bytes[1], 7) -- hash size + + if version == 0 and (addr_type == 0 or addr_type == 8)then -- TODO: Add checksum validation some day return true |