AM263P4: Keys generation using Openssl

Kunukuntla Geetha

Part Number: AM263P4

Hi,

The following sequence is used to generate degenerate RSA keys:
1. Create a random RSA key:
openssl genrsa –out key.pem

Does this command generate only private key or public-private pair key?

But when i see through the key.pem, it titled as BEGIN PRIVATE KEY,if it contains only private key, how do we generate corresponding public key?

Thanks and Regards,

Geetha.

2 months ago

0 Shaunak Deshpande 2 months ago

TI__Mastermind 18972 points

You can derive the public key from RSA private key:

1. Generate Private key:

2. Extract public key:

Optionally, you can also change the format (if needed) of the key, or encrypt the RSA keys (if needed). I'd suggest following openssl documentation of in-depth understanding

Regards,
Shaunak

0 Kunukuntla Geetha 2 months ago in reply to Shaunak Deshpande

Intellectual 290 points

Hi Shaunak,

During image signing we just give a file named Mpk.pem without differentiating the private and public key inside the file, do signing scripts extract public/private key and sign with private key and insert the public key in the certficate?

Reagrds,

Geetha K

0 Shaunak Deshpande 1 month ago in reply to Kunukuntla Geetha

TI__Mastermind 18972 points

yes, we give private key to the signing tool and public key is extracted by tool from private key and put in certificate.

openssl req command will take care of it

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AM263P4: Keys generation using Openssl