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Matt Sicker commented on SSHD-704: ---------------------------------- Though from a theoretical point of view, since there's already an EdDSA library dependency that implements Edwards curves as in Ed25519 signatures, there's a formula to convert Montgomery curves used in X25519 back and forth to their corresponding Edwards curves. Let {{p = 2^255 - 19}} and {{A = 486662}}. The Montgomery curve in X25519 is the formula {{y^2 = x^3 + A*x^2 + x}} modulo {{p}} (i.e., over the finite prime field). That's isomorphic to the Edwards curve with {{d = 1 - 1/121666}} in the formula {{x^2 + y^2 = 1 + d*x^2*y^2}} modulo {{p}}. This allows implementers to use either the Montgomery curve or the Edwards curve for calculations involving either protocol (sounds handy for embedded platforms). Source: https://cr.yp.to/newelliptic/nistecc-20160106.pdf section 4 > Add support for curve25519-sha...@libssh.org key exchange > ---------------------------------------------------------- > > Key: SSHD-704 > URL: https://issues.apache.org/jira/browse/SSHD-704 > Project: MINA SSHD > Issue Type: Improvement > Affects Versions: 1.4.0 > Reporter: Lyor Goldstein > Priority: Major > Labels: features > Attachments: Curve25519.java, Curve25519SHA256AbstractDH.java, > Curve25519SHA256DHFactory.java, Curve25519SHA256KeyExchange.java, > Curve25519SHA256KeyExchangeFactory.java > > > See > * [curve25519-sha...@libssh.org kexy exchange > specification|https://git.libssh.org/projects/libssh.git/tree/doc/curve25519-sha...@libssh.org.txt] > * [Secure Shell (SSH) Key Exchange Method using Curve25519 and > Curve448|https://tools.ietf.org/html/draft-ietf-curdle-ssh-curves-06] > * [JEP 324: Key Agreement with Curve25519 and > Curve448|http://openjdk.java.net/jeps/324] -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@mina.apache.org For additional commands, e-mail: dev-h...@mina.apache.org