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@stevenhaddox
Last active December 14, 2023 05:42
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Convert .crt & .key files into .pem file for HTTParty

Two ways to do it, but only worked for me so I'll put it first and the second for reference:

$ openssl pkcs12 -export -in hostname.crt -inkey hostname.key -out hostname.p12
$ openssl pkcs12 -in hostname.p12 -nodes -out hostname.pem

Other options for this method in comments below:

# Note, the -certfile root.crt appends all CA certs to the export, I've never needed these so it's optional for my personal steps
$ openssl pkcs12 -export -in hostname.crt -inkey hostname.key -certfile root.crt -out hostname.p12
# Note, I've always had my hostname.crt as part of my .pem, so I keep my certs but apparently you may not have to, hence the nocerts flag being an extra option in this sample
$ openssl pkcs12 -in hostname.p12 -nocerts -nodes -out hostname.pem

The second method hasn't ever worked for me on the servers I've setup, but here it is for reference:

$ openssl x509 -in hostname.crt -inform DER -out hostname.crt.pem -outform PEM
$ openssl rsa -in hostname.key -out hostname.key.pem -outform PEM

Then to create the .pem I usually use just concat the two together with the PEM formatted certificate first and the key second.

@melroy89
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Thx!

@Prabhat36
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thank you so much... u save me..

@AvantesInc
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you have "hsot" name in your code. If you cut and paste this, make sure you correct the type or you're not going to get too far.

@dayron2004
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perfect!!!

@matthax
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matthax commented Aug 22, 2018

Thanks, forgot how to convert private keys when setting up a mysql instance. Second method worked perfectly

@hichMEN
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hichMEN commented Jan 15, 2019

the command generate an empty file, any idea please?

@tom-stacey-712
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You king. Thanks for the help!

@stevenhaddox
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Wow, I'd completely forgotten about this snippet. I'm glad to see it's been helpful to someone besides myself.

@Takerman
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Thank you very much. The first way worked to me.

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