From 4ed81d6426271344a8fcc9bc4401f10d0f530634 Mon Sep 17 00:00:00 2001
From: Steven Fackler <sfackler@gmail.com>
Date: Sat, 15 Oct 2016 13:12:37 -0700
Subject: [PATCH] Fix EVP_DigestVerifyFinal version support

---
 openssl/src/crypto/sign.rs | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/openssl/src/crypto/sign.rs b/openssl/src/crypto/sign.rs
index 2a72a390..c5d54597 100644
--- a/openssl/src/crypto/sign.rs
+++ b/openssl/src/crypto/sign.rs
@@ -168,9 +168,9 @@ impl<'a> Verifier<'a> {
 
     pub fn finish(&self, signature: &[u8]) -> Result<bool, ErrorStack> {
         unsafe {
-            let r = ffi::EVP_DigestVerifyFinal(self.0,
-                                               signature.as_ptr() as *const _ as _,
-                                               signature.len());
+            let r = EVP_DigestVerifyFinal(self.0,
+                                          signature.as_ptr() as *const _,
+                                          signature.len());
             match r {
                 1 => Ok(true),
                 0 => {
@@ -194,6 +194,17 @@ impl<'a> Write for Verifier<'a> {
     }
 }
 
+#[cfg(not(ossl101))]
+use ffi::EVP_DigestVerifyFinal;
+
+#[cfg(ossl101)]
+#[allow(bad_style)]
+unsafe fn EVP_DigestVerifyFinal(ctx: *mut ffi::EVP_MD_CTX,
+                                sigret: *const ::libc::c_uchar,
+                                siglen: ::libc::size_t) -> ::libc::c_int {
+    ffi::EVP_DigestVerifyFinal(ctx, sigret as *mut _, siglen)
+}
+
 #[cfg(test)]
 mod test {
     use serialize::hex::FromHex;