CODEWITHSUNDEEP
sslopensslssl-certificateprivate-key
chhameed
chhameed

Reputation: 4456

Get SSL certificate files from private key

I want to get crt & a chain file from a private key. the file I have is starting with

-----BEGIN RSA PRIVATE KEY-----

& an extension of .key file.

tried multiple ways to convert it using OpenSSL command but not getting it properly.

Upvotes: 1

Views: 2998

Answers (2)

Andrew Henle
Andrew Henle

Reputation: 1

Just having a private key does not provide the certificate associated with that key.

The certificate contains a lot of information that the mere private key does not, including validity dates, subject and signer DNs, SANs, usages, along with the cryptographic signature itself.

Upvotes: 1

Steffen Ullrich
Steffen Ullrich

Reputation: 123531

It is impossible to get certificate and chain from the private key. While one can get the public key from the private key file, the public key is part of the certificate. In addition to the public key it also contains subject, expiration, issuer and issuers signature - the last two needed to build and verify the trust chain.

Upvotes: 3

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