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[MISC] Warn for poorly tuned argon2id deployments (#1426)

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The warnings are currently limited to Linux based deployments, however this covers both container and host (static binary) based deployments.
We could potentially look to expand this to FreeBSD in future too.
This commit is contained in:
Amir Zarrinkafsh 2020-11-06 08:57:03 +11:00 committed by GitHub
parent 43af825f47
commit 66b1600455
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1 changed files with 19 additions and 0 deletions
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19
internal/server/server.go
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@ -1,9 +1,12 @@
package server
import (
"io/ioutil"
"net"
"os"
"runtime"
"strconv"
"strings"
duoapi "github.com/duosecurity/duo_api_golang"
"github.com/fasthttp/router"
@ -140,6 +143,22 @@ func StartServer(configuration schema.Configuration, providers middlewares.Provi
logging.Logger().Fatalf("Error initializing listener: %s", err)
}
if configuration.AuthenticationBackend.File != nil && configuration.AuthenticationBackend.File.Password.Algorithm == "argon2id" && runtime.GOOS == "linux" {
f, err := ioutil.ReadFile("/sys/fs/cgroup/memory/memory.limit_in_bytes")
if err != nil {
logging.Logger().Warnf("Error reading hosts memory limit: %s", err)
} else {
m, _ := strconv.Atoi(strings.TrimSuffix(string(f), "\n"))
hostMem := float64(m) / 1024 / 1024 / 1024
argonMem := float64(configuration.AuthenticationBackend.File.Password.Memory) / 1024
if hostMem/argonMem <= 2 {
logging.Logger().Warnf("Authelia's password hashing memory parameter is set to: %gGB this is %g%% of the available memory: %gGB", argonMem, argonMem/hostMem*100, hostMem)
logging.Logger().Warn("Please read https://www.authelia.com/docs/configuration/authentication/file.html#memory and tune your deployment")
}
}
}
if configuration.TLSCert != "" && configuration.TLSKey != "" {
logging.Logger().Infof("Authelia is listening for TLS connections on %s%s", addrPattern, configuration.Server.Path)
logging.Logger().Fatal(server.ServeTLS(listener, configuration.TLSCert, configuration.TLSKey))