46 lines
1.6 KiB
Go
46 lines
1.6 KiB
Go
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// Copyright 2022 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package node
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import (
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"fmt"
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"net/http"
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"time"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/golang-jwt/jwt/v4"
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)
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// NewJWTAuth creates an rpc client authentication provider that uses JWT. The
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// secret MUST be 32 bytes (256 bits) as defined by the Engine-API authentication spec.
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//
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// See https://github.com/ethereum/execution-apis/blob/main/src/engine/authentication.md
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// for more details about this authentication scheme.
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func NewJWTAuth(jwtsecret [32]byte) rpc.HTTPAuth {
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return func(h http.Header) error {
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
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"iat": &jwt.NumericDate{Time: time.Now()},
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})
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s, err := token.SignedString(jwtsecret[:])
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if err != nil {
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return fmt.Errorf("failed to create JWT token: %w", err)
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}
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h.Set("Authorization", "Bearer "+s)
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return nil
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}
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}
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