[Bug]: renew not working with reverse-proxy and mtls=false

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Seit 13.1.2025.

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Beschreibung

needs triage
Steps to Reproduce

I setup a certificate server (step 0.28.2 on ubuntu 24.04.1) and a nginx reverse proxy.
Issuing certificate works fine from step service or nginx.
But renewal does not work when using nginx ca-url (port 443). It works if accessing directly step service (port 8443).
"mtls=false" was used. "--mtls false" as described in docs did not work with step-cli for me.
It does not seem there is any debug/verbose option to check where getting invalid character which is probably the start of a html page.

From cert-renewer systemd unit

ExecStart=/usr/bin/step ca renew --ca-url=https://certs.internal --root=/usr/share/ca-certificates/stepca-internal-roots.pem --mtls false --force ${CERT_LOCATION} ${KEY_LOCATION} (code=exited, status=1/FAILURE)
# results in
Jan 08 21:50:43 myhost.internal step[3935]: too many positional arguments were provided in 'step ca renew <crt-file> <key-file>'

Manual testing

root@myhost:~# /usr/bin/step ca renew --ca-url=https://certs.internal --root=/usr/share/ca-certificates/stepca-internal-roots.pem --mtls false /etc/ssl/certs/myhost.crt /etc/ssl/private/myhost.key
too many positional arguments were provided in 'step ca renew <crt-file> <key-file>'
root@myhost:~# /usr/bin/step ca renew --ca-url=https://certs.internal --root=/usr/share/ca-certificates/stepca-internal-roots.pem /etc/ssl/certs/myhost.crt /etc/ssl/private/myhost.key
error renewing certificate: failed decoding CA error response: invalid character '<' looking for beginning of value
root@myhost:~# /usr/bin/step ca renew --mtls false --ca-url=https://certs.internal --root=/usr/share/ca-certificates/stepca-internal-roots.pem /etc/ssl/certs/myhost.crt /etc/ssl/private/myhost.key
too many positional arguments were provided in 'step ca renew <crt-file> <key-file>'
root@myhost:~# /usr/bin/step ca renew --ca-url=https://certs.internal --root=/usr/share/ca-certificates/stepca-internal-roots.pem /etc/ssl/certs/myhost.crt /etc/ssl/private/myhost.key
error renewing certificate: failed decoding CA error response: invalid character '<' looking for beginning of value

Thanks

Your Environment
  • OS - Ubuntu 24.04.1
  • step CLI Version - 0.28.2
Expected Behavior

Renewal to work

Actual Behavior

Renewal fails

Additional Context

No response

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