PKCS#1 support about forge HOT 6 CLOSED

I only took a quick look, but are you talking about PKCS#1.5 padding support? Because Forge already has this:

https://github.com/digitalbazaar/forge/blob/master/js/rsa.js#L236

I think that's the same padding that Tom Wu's rsa.js file appears to be doing.

from forge.

I'm talking about generating those public keys that have an RSA PUBLIC KEY header instead of just PUBLIC KEY.

http://www.cryptosys.net/pki/rsakeyformats.html says that the format I want is PKCS#1 RSAPublicKey but the format that's currently implemented seems to be X.509 SubjectPublicKeyInfo.

I once just swapped those comments but that totally broke things :D

from forge.

The format I'm after seems to be

RSAPublicKey ::= SEQUENCE {
          modulus           INTEGER,  -- n
          publicExponent    INTEGER   -- e
      }

whereas the currently implemented format seems to be

SubjectPublicKeyInfo  ::=  SEQUENCE  {
     algorithm            AlgorithmIdentifier,
     subjectPublicKey     BIT STRING  }

...I can't really figure out how those 2 formats differ exactly

from forge.

A SubjectPublicKeyInfo is a wrapper for an RSAPublicKey. It supports more than just RSA and is the most common format for transporting public keys. Constructing an RSAPublicKey is a prerequisite to storing an RSA key in a SubjectPublicKeyInfo so this was already available in Forge, however, an API for generating just the RSAPublicKey was not exposed because it's not used nearly as often as a SubjectPublicKeyInfo. I quickly added a couple of methods to let you use just the raw RSAPublicKey:

forge.pki.publicKeyToRSAPublicKey
forge.pki.publicKeyToRSAPublicKeyPem

Hopefully this is what you need. If so, please feel free to close the issue.

from forge.

This does exactly what I want, super big thank you!

from forge.

@juliangruber, great, sure!

from forge.