CSR Decoder Features

In addition to decoding the CSR, the decoder has a few other features including:

Verify the CSR

A CSR is signed by the private key corresponding to the public key in the CSR. The decoder verifies the signature on the CSR and warns you if it isn't valid. An invalid signature indicates that the CSR has been modified since it was created or the public key in the CSR doesn't correspond to the private key used to sign it.

Calculate CSR fingerprint

The decoder calculates the SHA-1 fingerprint over the complete DER encoded CSR.

Tidy CSR

The decoder tidies up the CSR so that it is nicely layed out. This includes, for example, adding the header and footer ( lines beginning with ----- ) if they are missing from the CSR you provide. Try pasting in a CSR without a header and footer line to see this feature in action.