duo_unix openssl 1.1.0 update

hmac_fixup.patch

# Update hmac related code for changes in openssl 1.1.0
# Author: Evan Anderson <evananderson@thelinuxman.us>
--- a/lib/https.c       2016-08-08 13:55:29.000000000 -0400
+++ b/lib/https.c       2017-04-24 15:31:51.980702951 -0400
@@ -623,7 +623,7 @@
     int argc, char *argv[])
 {
         BIO *b64;
-       HMAC_CTX hmac;
+       HMAC_CTX *hmac;
        unsigned char MD[SHA_DIGEST_LENGTH];
         char *qs, *p;
         int i, n, is_get;
@@ -655,11 +655,11 @@
         /* Add signature */
         BIO_puts(req->cbio, "Authorization: Basic ");

-       HMAC_CTX_init(&hmac);
-       HMAC_Init(&hmac, ctx->skey, strlen(ctx->skey), EVP_sha1());
-       HMAC_Update(&hmac, (unsigned char *)p, strlen(p));
-       HMAC_Final(&hmac, MD, NULL);
-       HMAC_CTX_cleanup(&hmac);
+       hmac = HMAC_CTX_new();
+       HMAC_Init(hmac, ctx->skey, strlen(ctx->skey), EVP_sha1());
+       HMAC_Update(hmac, (unsigned char *)p, strlen(p));
+       HMAC_Final(hmac, MD, NULL);
+       HMAC_CTX_free(hmac);
         free(p);

         b64 = _BIO_new_base64();

pkgbuild prepare

prepare() {
  cd "${srcdir}/${pkgname}-${pkgver}"
  patch -p1 -i ../../hmac_fixup.patch
}