35 lines
908 B
Rust
35 lines
908 B
Rust
// This is an example of three-party Diffie-Hellman key exchange
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// Requires two rounds
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extern crate bn;
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extern crate rand;
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use bn::*;
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fn main() {
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let rng = &mut rand::thread_rng();
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// Construct private keys
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let alice_sk = Scalar::random(rng);
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let bob_sk = Scalar::random(rng);
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let carol_sk = Scalar::random(rng);
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// Construct public keys
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let alice_pk = G1::one() * &alice_sk;
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let bob_pk = G1::one() * &bob_sk;
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let carol_pk = G1::one() * &carol_sk;
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// Round one:
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let alice_dh_1 = &bob_pk * &carol_sk;
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let bob_dh_1 = &carol_pk * &alice_sk;
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let carol_dh_1 = &alice_pk * &bob_sk;
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// Round two:
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let alice_dh_2 = alice_dh_1 * &alice_sk;
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let bob_dh_2 = bob_dh_1 * &bob_sk;
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let carol_dh_2 = carol_dh_1 * &carol_sk;
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// All parties should arrive to the same shared secret
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assert!(alice_dh_2 == bob_dh_2 && bob_dh_2 == carol_dh_2);
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}
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