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Make Context conform to "x/crypto/ssh".ConnMetadata interface #124

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Make Context conform to "x/crypto/ssh".ConnMetadata interface #124

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Commits on Oct 21, 2019

  1. Make Context implement "x/crypto/ssh".ConnMetadata interface 

    It's useful for this package's sshContext to implement ConnMetadata when you
want to authenticate user certificates from a PublicKeyHandler.

Somewhat realistic example of user certificate checking after this patch:

    checker := gossh.CertChecker{
        IsUserAuthority: func(pub gossh.PublicKey) bool {
            // our own logic to check whether pub is acceptable
            return true
        }
    }

    func isUserCertOk(ctx ssh.Context, key ssh.PublicKey) bool {
        if cert, ok := key.(*gossh.Certificate); ok {
            _, err := checker.Authenticate(ctx, cert)
        }
    }

    sshServer := &ssh.Server{
        // ...
        PublicKeyHandler: isUserCertOK,
    }
    @ransford-stripe
    ransford-stripe committed Oct 21, 2019
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