[CSR RFR] 8242068: Signed JAR support for RSASSA-PSS and EdDSA

Weijun Wang weijun.wang at oracle.com
Tue May 19 13:58:25 UTC 2020

One more thing: do you think we should allow "-siglag Ed25519" and "-sigalg Ed448"? It looks like we should support it because we can call Signature.getInstance() on it, but even if so, the block extension name will still be "EDD" (or "EdDSA").


> On May 19, 2020, at 5:43 PM, Weijun Wang <weijun.wang at oracle.com> wrote:
> Please review the CSR at
>   https://bugs.openjdk.java.net/browse/JDK-8245274
> The most arguable is the new block extension names. I drafted "PSS" for "RSASSA-PSS", and "EDD" for "EdDSA", since the old extension names never exceeded 3 letters. If we do not care about this, we can just make them "RSASSA-PSS" and "EdDSA". We've always treated the extension name in a case-insensitive way but this needs some debugging.
> Another thing I haven't mentioned in the CSR is about using `-sigalg RSASSA-PSS` for an RSA key. The hashAlgorithm and maskGenAlgorithm of the PSS parameters will be determined by the key size of the key, i.e.
>    // Same values for RSA and DSA
>    private static String ifcFfcStrength (int bitLength) {
>        if (bitLength > 7680) { // 256 bits
>            return "SHA512";
>        } else if (bitLength > 3072) {  // 192 bits
>            return "SHA384";
>        } else  { // 128 bits and less
>            return "SHA256";
>        }
>    }
> and it's not adjustable. I don't know what the best place is for this info.
> Thanks,
> Max

More information about the security-dev mailing list