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use ffi;
use error::ErrorStack;
use bio::MemBioSlice;
use std::ptr;
use {cvt, cvt_p};
use bn::BigNum;
use std::mem;
pub struct DH(*mut ffi::DH);
impl DH {
pub fn from_params(p: BigNum, g: BigNum, q: BigNum) -> Result<DH, ErrorStack> {
unsafe {
let dh = DH(try!(cvt_p(ffi::DH_new())));
try!(cvt(compat::DH_set0_pqg(dh.0,
p.as_ptr(),
q.as_ptr(),
g.as_ptr())));
mem::forget((p, g, q));
Ok(dh)
}
}
pub fn from_pem(buf: &[u8]) -> Result<DH, ErrorStack> {
let mem_bio = try!(MemBioSlice::new(buf));
unsafe {
cvt_p(ffi::PEM_read_bio_DHparams(mem_bio.as_ptr(),
ptr::null_mut(),
None,
ptr::null_mut()))
.map(DH)
}
}
/// Requires the `v102` or `v110` features and OpenSSL 1.0.2 or OpenSSL 1.1.0.
#[cfg(any(all(feature = "v102", ossl102), all(feature = "v110", ossl110)))]
pub fn get_1024_160() -> Result<DH, ErrorStack> {
unsafe {
cvt_p(ffi::DH_get_1024_160()).map(DH)
}
}
/// Requires the `v102` or `v110` features and OpenSSL 1.0.2 or OpenSSL 1.1.0.
#[cfg(any(all(feature = "v102", ossl102), all(feature = "v110", ossl110)))]
pub fn get_2048_224() -> Result<DH, ErrorStack> {
unsafe {
cvt_p(ffi::DH_get_2048_224()).map(DH)
}
}
/// Requires the `v102` or `v110` features and OpenSSL 1.0.2 or OpenSSL 1.1.0.
#[cfg(any(all(feature = "v102", ossl102), all(feature = "v110", ossl110)))]
pub fn get_2048_256() -> Result<DH, ErrorStack> {
unsafe {
cvt_p(ffi::DH_get_2048_256()).map(DH)
}
}
pub unsafe fn as_ptr(&self) -> *mut ffi::DH {
self.0
}
}
impl Drop for DH {
fn drop(&mut self) {
unsafe {
ffi::DH_free(self.as_ptr())
}
}
}
#[cfg(ossl110)]
mod compat {
pub use ffi::DH_set0_pqg;
}
#[cfg(ossl10x)]
#[allow(bad_style)]
mod compat {
use ffi;
use libc::c_int;
pub unsafe fn DH_set0_pqg(dh: *mut ffi::DH,
p: *mut ffi::BIGNUM,
q: *mut ffi::BIGNUM,
g: *mut ffi::BIGNUM) -> c_int {
(*dh).p = p;
(*dh).q = q;
(*dh).g = g;
1
}
}
#[cfg(test)]
mod tests {
use super::DH;
use bn::BigNum;
use ssl::{SslMethod, SslContext};
#[test]
#[cfg(any(all(feature = "v102", ossl102), all(feature = "v110", ossl110)))]
fn test_dh_rfc5114() {
let mut ctx = SslContext::builder(SslMethod::tls()).unwrap();
let dh1 = DH::get_1024_160().unwrap();
ctx.set_tmp_dh(&dh1).unwrap();
let dh2 = DH::get_2048_224().unwrap();
ctx.set_tmp_dh(&dh2).unwrap();
let dh3 = DH::get_2048_256().unwrap();
ctx.set_tmp_dh(&dh3).unwrap();
}
#[test]
fn test_dh() {
let mut ctx = SslContext::builder(SslMethod::tls()).unwrap();
let p = BigNum::from_hex_str("87A8E61DB4B6663CFFBBD19C651959998CEEF608660DD0F25D2CEED4435\
E3B00E00DF8F1D61957D4FAF7DF4561B2AA3016C3D91134096FAA3BF429\
6D830E9A7C209E0C6497517ABD5A8A9D306BCF67ED91F9E6725B4758C02\
2E0B1EF4275BF7B6C5BFC11D45F9088B941F54EB1E59BB8BC39A0BF1230\
7F5C4FDB70C581B23F76B63ACAE1CAA6B7902D52526735488A0EF13C6D9\
A51BFA4AB3AD8347796524D8EF6A167B5A41825D967E144E5140564251C\
CACB83E6B486F6B3CA3F7971506026C0B857F689962856DED4010ABD0BE\
621C3A3960A54E710C375F26375D7014103A4B54330C198AF126116D227\
6E11715F693877FAD7EF09CADB094AE91E1A1597")
.unwrap();
let g = BigNum::from_hex_str("3FB32C9B73134D0B2E77506660EDBD484CA7B18F21EF205407F4793A1A0\
BA12510DBC15077BE463FFF4FED4AAC0BB555BE3A6C1B0C6B47B1BC3773\
BF7E8C6F62901228F8C28CBB18A55AE31341000A650196F931C77A57F2D\
DF463E5E9EC144B777DE62AAAB8A8628AC376D282D6ED3864E67982428E\
BC831D14348F6F2F9193B5045AF2767164E1DFC967C1FB3F2E55A4BD1BF\
FE83B9C80D052B985D182EA0ADB2A3B7313D3FE14C8484B1E052588B9B7\
D2BBD2DF016199ECD06E1557CD0915B3353BBB64E0EC377FD028370DF92\
B52C7891428CDC67EB6184B523D1DB246C32F63078490F00EF8D647D148\
D47954515E2327CFEF98C582664B4C0F6CC41659")
.unwrap();
let q = BigNum::from_hex_str("8CF83642A709A097B447997640129DA299B1A47D1EB3750BA308B0FE64F\
5FBD3")
.unwrap();
let dh = DH::from_params(p, g, q).unwrap();
ctx.set_tmp_dh(&dh).unwrap();
}
#[test]
fn test_dh_from_pem() {
let mut ctx = SslContext::builder(SslMethod::tls()).unwrap();
let params = include_bytes!("../test/dhparams.pem");
let dh = DH::from_pem(params).ok().expect("Failed to load PEM");
ctx.set_tmp_dh(&dh).unwrap();
}
}
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