Add support for OpenSSL 1.1.0

This commit is relatively major refactoring of the `openssl-sys` crate as well
as the `openssl` crate itself. The end goal here was to support OpenSSL 1.1.0,
and lots of other various tweaks happened along the way. The major new features
are:

* OpenSSL 1.1.0 is supported
* OpenSSL 0.9.8 is no longer supported (aka all OSX users by default)
* All FFI bindings are verified with the `ctest` crate (same way as the `libc`
  crate)
* CI matrixes are vastly expanded to include 32/64 of all platforms, more
  OpenSSL version coverage, as well as ARM coverage on Linux
* The `c_helpers` module is completely removed along with the `gcc` dependency.
* The `openssl-sys` build script was completely rewritten
  * Now uses `OPENSSL_DIR` to find the installation, not include/lib env vars.
  * Better error messages for mismatched versions.
  * Better error messages for failing to find OpenSSL on a platform (more can be
    done here)
  * Probing of OpenSSL build-time configuration to inform the API of the `*-sys`
    crate.
* Many Cargo features have been removed as they're now enabled by default.

As this is a breaking change to both the `openssl` and `openssl-sys` crates this
will necessitate a major version bump of both. There's still a few more API
questions remaining but let's hash that out on a PR!

Closes #452

1 files changed, 0 insertions, 77 deletions

diff --git a/openssl-sys/src/probe.rs b/openssl-sys/src/probe.rs
deleted file mode 100644
index e3711b54..00000000
--- a/openssl-sys/src/probe.rs
+++ /dev/null
@@ -1,77 +0,0 @@
-use std::env;
-use std::fs;
-use std::path::PathBuf;
-
-pub struct ProbeResult {
-    pub cert_file: Option<PathBuf>,
-    pub cert_dir: Option<PathBuf>,
-}
-
-/// Probe the system for the directory in which CA certificates should likely be
-/// found.
-///
-/// This will only search known system locations.
-pub fn find_certs_dirs() -> Vec<PathBuf> {
-    // see http://gagravarr.org/writing/openssl-certs/others.shtml
-    [
-        "/var/ssl",
-        "/usr/share/ssl",
-        "/usr/local/ssl",
-        "/usr/local/openssl",
-        "/usr/local/share",
-        "/usr/lib/ssl",
-        "/usr/ssl",
-        "/etc/openssl",
-        "/etc/pki/tls",
-        "/etc/ssl",
-    ].iter().map(|s| PathBuf::from(*s)).filter(|p| {
-        fs::metadata(p).is_ok()
-    }).collect()
-}
-
-pub fn init_ssl_cert_env_vars() {
-    let ProbeResult { cert_file, cert_dir } = probe();
-    match cert_file {
-        Some(path) => put("SSL_CERT_FILE", path),
-        None => {}
-    }
-    match cert_dir {
-        Some(path) => put("SSL_CERT_DIR", path),
-        None => {}
-    }
-
-    fn put(var: &str, path: PathBuf) {
-        // Don't stomp over what anyone else has set
-        match env::var(var) {
-            Ok(..) => {}
-            Err(..) => env::set_var(var, &path),
-        }
-    }
-}
-
-pub fn probe() -> ProbeResult {
-    let mut result = ProbeResult {
-        cert_file: env::var_os("SSL_CERT_FILE").map(PathBuf::from),
-        cert_dir: env::var_os("SSL_CERT_DIR").map(PathBuf::from),
-    };
-    for certs_dir in find_certs_dirs().iter() {
-        // cert.pem looks to be an openssl 1.0.1 thing, while
-        // certs/ca-certificates.crt appears to be a 0.9.8 thing
-        for cert in [
-            "cert.pem",
-            "certs.pem",
-            "certs/ca-certificates.crt",
-            "certs/ca-root-nss.crt"
-        ].iter() {
-            try(&mut result.cert_file, certs_dir.join(cert));
-        }
-        try(&mut result.cert_dir, certs_dir.join("certs"));
-    }
-    result
-}
-
-fn try(dst: &mut Option<PathBuf>, val: PathBuf) {
-    if dst.is_none() && fs::metadata(&val).is_ok() {
-        *dst = Some(val);
-    }
-}