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node: add JWT secret log line #25095

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merged 4 commits into from Jun 15, 2022
Merged

node: add JWT secret log line #25095

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33a9e1e
node: add JWT secret log line
MariusVanDerWijden Jun 15, 2022
d961279
node: better log
MariusVanDerWijden Jun 15, 2022
1eee315
Update node.go
fjl Jun 15, 2022
e282475
Update node.go
fjl Jun 15, 2022
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1 change: 1 addition & 0 deletions node/node.go
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Expand Up @@ -356,6 +356,7 @@ func (n *Node) obtainJWTSecret(cliParam string) ([]byte, error) {
if data, err := os.ReadFile(fileName); err == nil {
jwtSecret := common.FromHex(strings.TrimSpace(string(data)))
if len(jwtSecret) == 32 {
log.Info("Read JWT secret", "path", fileName)
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One thing I've been thinking of, is if we should output even more info. Like, perhaps the crc32 checksum of the secret? It's annoying trying to figure out of EL and CL have the same secret.
Would be easier if they both spit out some low-entropy signature.. (?)

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Like, how about something like this?

			log.Info("Read JWT secret", "path", fileName, "crc32", fmt.Sprintf("%#x", crc32.ChecksumIEEE(jwtSecret)))

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INFO [06-15|10:17:36.628] Read JWT secret                          path=/media/ropsten/geth/jwtsecret crc32=0x4ce4e295

return jwtSecret, nil
}
log.Error("Invalid JWT secret", "path", fileName, "length", len(jwtSecret))
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