Set multiline ENV variable in production

Did you try to set up a private key as ENV variable in production but you get the following error:

OpenSSL::PKey::RSAError: Neither PUB key nor PRIV key: nested asn1 error

So if you are setting your ENV variables through a terminal tool, use the following approach:

MY_KEY=$(cat my_multiline_key.txt)

Next, we need to remove the escape character added when setting the key:

ENV.fetch("MY_KEY").gsub("\\n", "\n")

That’s it we have fixed this error and our customers are happy again! 🙂


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