sshj can't run with java 6

[sblond]

Hi,

I get java.lang.UnsupportedClassVersionError: net/i2p/crypto/eddsa/spec/EdDSAParameterSpec : Unsupported major.minor version 51.0 when using sshj 0.15.0 with java 6. Usually this error means that a class has been compiled with java 7 compatibility but run with an older java.

This may be related to the fix of #171 that adds a new dependency to net.vrallev.ecc:ecc-25519-java:1.0.1. This dependency seems to require the use of java 7 https://github.com/vRallev/ECC-25519/blob/master/ECC-25519-Java/build.gradle.

Does it mean that java 6 compatibility is dropped?

[hierynomus]

Hi Stephane,

Thanks for pointing that out. Hadn't actually noticed that!
I am somewhat inclined to then maybe indeed drop java6 support for new versions. Or to make ecc-25519 an optional dependency, and checking in the code whether it can be added or not.
What would be the preference?

[dkocher]

+1 to drop Java 6 support.

[sblond]

I have to deal with java 6, so
+1 to keep java 6 support

[hierynomus]

I cannot easily make ecc-25519 optional, as it is used directly in the KeyType enum, so I cannot optionally load it. So I am dropping java6 support, sorry.

[hierynomus]

@sblond We've been able to add Java6 support back to the mix.

[sblond]

Hi,
I upgraded to 0.18.0 and it worked fine.
Thanks!