Fix build

3 files changed, 17 insertions, 1 deletions

diff --git a/openssl/src/c_helpers.c b/openssl/src/c_helpers.c
index 4a2021e4..13041956 100644
--- a/openssl/src/c_helpers.c
+++ b/openssl/src/c_helpers.c
@@ -15,6 +15,18 @@ STACK_OF(X509_EXTENSION) *rust_X509_get_extensions(X509 *x) {
     return x->cert_info ? x->cert_info->extensions : NULL;
 }
 
+DH *rust_DH_new_from_params(BIGNUM *p, BIGNUM *g, BIGNUM *q) {
+    DH *dh;
+
+    if ((dh = DH_new()) == NULL) {
+        return NULL;
+    }
+    dh->p = p;
+    dh->g = g;
+    dh->q = q;
+    return dh;
+}
+
 #if OPENSSL_VERSION_NUMBER < 0x10000000L
 int rust_HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int key_len, const EVP_MD *md, ENGINE *impl) {
     HMAC_Init_ex(ctx, key, key_len, md, impl);
diff --git a/openssl/src/c_helpers.rs b/openssl/src/c_helpers.rs
index a195d88f..90fcf877 100644
--- a/openssl/src/c_helpers.rs
+++ b/openssl/src/c_helpers.rs
@@ -10,4 +10,5 @@ extern "C" {
     pub fn rust_HMAC_Init_ex(ctx: *mut ffi::HMAC_CTX, key: *const c_void, keylen: c_int, md: *const ffi::EVP_MD, impl_: *mut ffi::ENGINE) -> c_int;
     pub fn rust_HMAC_Final(ctx: *mut ffi::HMAC_CTX, output: *mut c_uchar, len: *mut c_uint) -> c_int;
     pub fn rust_HMAC_Update(ctx: *mut ffi::HMAC_CTX, input: *const c_uchar, len: c_uint) -> c_int;
+    pub fn rust_DH_new_from_params(p: *mut ffi::BIGNUM, g: *mut ffi::BIGNUM, q: *mut ffi::BIGNUM) -> *mut ffi::DH;
 }
diff --git a/openssl/src/dh/mod.rs b/openssl/src/dh/mod.rs
index c0122d44..b9613a1d 100644
--- a/openssl/src/dh/mod.rs
+++ b/openssl/src/dh/mod.rs
@@ -7,9 +7,11 @@ use std::ptr;
 pub struct DH(*mut ffi::DH);
 
 impl DH {
+    /// Requires the `dh_from_params` feature.
+    #[cfg(feature = "dh_from_params")]
     pub fn from_params(p: BigNum, g: BigNum, q: BigNum) -> Result<DH, ErrorStack> {
         let dh = unsafe {
-            try_ssl_null!(ffi::DH_new_from_params(p.into_raw(), g.into_raw(), q.into_raw()))
+            try_ssl_null!(::c_helpers::rust_DH_new_from_params(p.into_raw(), g.into_raw(), q.into_raw()))
         };
         Ok(DH(dh))
     }
@@ -75,6 +77,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg(feature = "dh_from_params")]
     fn test_dh() {
         let mut ctx = SslContext::new(Sslv23).unwrap();
         let p = BigNum::from_hex_str("87A8E61DB4B6663CFFBBD19C651959998CEEF608660DD0F25D2CEED4435\