Where can i find AWS EC2 X.509 Certificate private key [closed]

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Only the cert-xxxxx.pem can be download.

Can not find the create new key pair link in my account, but found it in source code, and created the new key pair.

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For security reasons, AWS does not retain a copy of your private key.

http://docs.amazonwebservices.com/AWSSecurityCredentials/1.0/AboutAWSCredentials.html#X509Credentials

If you have us generate your X.509 certificates, we give you a PEM-encoded certificate file, and a PEM-encoded private key (unencrypted, which means you don't get a password for it). You'll need to convert the files to whatever format your toolkit uses (see the toolkit's documentation for help). Even though we provide you the private key, we don't store it anywhere. If you lose it, you must switch to using a different X.509 certificate.

If you provide your own keys, you must upload only your certificate to AWS (you keep the private key). The certificate must be in PEM format. AWS accepts any syntactically and cryptographically valid, unexpired X.509 certificates. They don't need to be from a formal Certificate Authority (CA).