nx_mse_dh.nx

buildroot/runtime/nx_mse_dh.nx

5016 B77 linesdepth 4pulls 5 transitivereach 18 importersview sourcekind tooltopic mse

docs dependencies structs consts functions

about

nx_mse_dh.nx -- MSE/PE Diffie-Hellman key exchange (BitTorrent Message Stream Encryption anti-throttle). MSE hides the BitTorrent handshake from ISP DPI so it can't be fingerprinted + throttled. Step 1 is a DH exchange over a FIXED 768-bit prime P (the MSE/PE spec's prime) with generator G=2: each side picks a private Xa, sends Ya = G^Xa mod P; the shared secret S = Yb^Xa mod P = Ya^Xb mod P feeds the RC4 handshake keys. Composes bi_modexp (nx_bigint_modexp). P is 24 u32 limbs (768 bits). PUBLIC params -> no secrecy in P/G. nx_mse_dh -- no-arg = GATE: two parties derive the SAME S (Sa==Sb), pubkeys differ, S != 0. license_tier: ORIGINAL module: nishi-core.torrent.mse_dh depends: nishi-core.crypto.bigint_modexp

dependencies 1 imports · 1 importers

imports: nx_bigint_modexp.nx

imported by: nx_mse_keys.nx

call flow from main pre-order; caps 40 nodes / depth 6 declared; ↻ = already shown

structs

none

consts

12	const MSE_N: i64 = 24 // 768-bit / 32 = 24 limbs
14	const MSE_P_HEX: u8 = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A63A36210000000000090563" as u8

functions

16	func if_s(b: i64) -> u8 { if b==1 { return "1" as u8 } return "0" as *u8 } called by 2: main main
17	func md_p(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(1,s,n); return 0 } called by 4: main main main main
18	func md_hv(c: i64) -> i64 { if c>=48 { if c<=57 { return c-48 } } if c>=97 { if c<=102 { return c-87 } } if c>=65 { if c<=70 { return c-55 } } return 0 } called by 1: md_hex2bytes
20	func md_hex2bytes(hex: u8, nbytes: i64, out: u8) -> i64 called by 1: md_load_p calls 1: md_hv
25	func md_load_p(p: *i64) -> i64 called by 5: main main main mse_connect mse_accept_dh calls 2: md_hex2bytes bi_from_bytes_be
32	func md_nonzero(a: *i64, n: i64) -> i64 { var i: i64=0; while i<n { if (a[i] & 0xFFFFFFFF) != 0 { return 1 } i=i+1 } return 0 } called by 1: main
33	func md_eq(a: i64, b: i64, n: i64) -> i64 { var i: i64=0; while i<n { if (a[i]&0xFFFFFFFF) != (b[i]&0xFFFFFFFF) { return 0 } i=i+1 } return 1 } called by 2: main main
36	func mse_dh_public(x: i64, p: i64, out: *i64) -> i64 called by 5: main main main mse_connect mse_accept_dh calls 2: bi_zero bi_modexp
42	func mse_dh_shared(peer_pub: i64, x: i64, p: i64, out: i64) -> i64 called by 5: main main main mse_connect mse_accept_dh calls 1: bi_modexp
47	func main() -> i64 calls 8: md_load_p bi_zero md_p mse_dh_public mse_dh_shared md_nonzero+2