bitcoind with rpcauth: how to use rpcauth with curl?

Question

In bitcoin.conf, if the rpcuser/rpcpassword is specified, I can access the RPC via curl like this:

curl --data-binary '{"jsonrpc": "1.0", "id": "test", "method": "getblockchaininfo", "params": []}'  http://user:pass@127.0.0.1:8332/

Now that the rpcuser/rpcpassword option has been deprecated in favor of the new rpcauth option:

rpcauth=user:3f7c53e8c31facfaabbccf7bc4c02775$4f81f1a9c46a366d55bdf2f94ad7ddeeaa8d37cab0942430f2beffc7aca5d916

How can the rpcauth string be used to authenticate curl access?

Thank you.

Answer 1

You can't, that's the point.

The rpcauth string is generated by the rpcauth tool, and contains a hash of your password. You authenticate exactly the same way: by providing the username and password. But you can't go back from rpcauth string to password.