Ryan Ofsky 4272966d02 Merge bitcoin/bitcoin#32423: rpc: Undeprecate rpcuser/rpcpassword, store all credentials hashed in memory
e49a7274a2 rpc: Avoid join-split roundtrip for user:pass for auth credentials (Vasil Dimov)
98ff38a6f1 rpc: Perform HTTP user:pass split once in `RPCAuthorized` (laanwj)
879a17bcb1 rpc: Store all credentials hashed in memory (laanwj)
4ab9bedee9 rpc: Undeprecate rpcuser/rpcpassword, change message to security warning (laanwj)

Pull request description:

  This PR does two things:

  ### Undeprecate rpcuser/rpcpassword, change message to security warning

  Back in 2015, in https://github.com/bitcoin/bitcoin/pull/7044, we added configuration option `rpcauth` for multiple RPC users. At the same time the old settings for single-user configuration `rpcuser` and `rpcpassword` were "soon" to be deprecated.

  The main reason for this deprecation is that while `rpcpassword` stores the password in plain text, `rpcauth` stores a hash, so it doesn't appear in the configuration in plain text.

  As the options are still in active use, actually removing them is expected to be a hassle to many, and it's not clear that is worth it. As for the security risk, in many kinds of setups (no wallet, containerized, single-user-single-application, local-only, etc) it is an unlikely point of escalation.

  In the end, it is good to encourage secure practices, but it is the responsibility of the user. Log a clear warning but remove the deprecation notice (this is also the only place where the options appear as deprecated, they were never marked as such in the -help output).

  <hr>

  ### Store all credentials hashed in memory

  This gets rid of the special-casing of `strRPCUserColonPass` by hashing cookies as well as manually provided `-rpcuser`/`-rpcpassword` with a random salt before storing them.

  Also take the opportunity to modernize the surrounding code a bit. There should be no end-user visible differences in behavior.

  <hr>

  Closes #29240.

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2025-05-19 12:41:56 -04:00
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Bitcoin Core integration/staging tree

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For an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/.

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Bitcoin Core connects to the Bitcoin peer-to-peer network to download and fully validate blocks and transactions. It also includes a wallet and graphical user interface, which can be optionally built.

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