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Posted over 5 years ago. Visible to the public.

Fix "A client error (MalformedCertificate) occurred: Invalid Private Key." at AWS SSL Certificate upload

I'm creating certificate requests with this command:

openssl req -new -out www.example.com.csr -keyout www.example.com.key -newkey rsa:2048 -nodes

When I try to upload the certificate to AWS IAM I get this error:

$ aws iam upload-server-certificate --server-certificate-name www.example.com-2013010-2014010 --certificate-body www.example.com.crt --private-key www.example.com.key --certificate-chain www.example.com.ca-bundle A client error (MalformedCertificate) occurred: Invalid Public Key Certificate.

That's because of the format of the key file (www.example.com.key).

If it starts with -----BEGIN PRIVATE KEY----- you have to convert it to rsa:

mv www.example.com.key www.example.com.key_norsa openssl rsa -in www.example.com.key_norsa -out www.example.com.key

After this the key file should start with -----BEGIN RSA PRIVATE KEY----- and the upload should work without any problems.

Owner of this card:

Kim Jahn
Last edit:
over 2 years ago
by Andreas Herz
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