add weak-crypto feature

This commit disables by default a few of the weaker cryptographical algorithms
that are not directly exposed through the rust-openssl crate. The compilation of
these can be re-enabled by selecting the "weak-crypto" feature. This
should slighly reduce compilation time and compiled size.

Signed-off-by: Petre Eftime <[email protected]>

Author: petreeftime

Cargo.toml

@@ -16,6 +16,10 @@ exclude = [
   'openssl/test/*',
 ]
 
+[features]
+default = []
+weak-crypto = []
+
 [workspace]
 members = ['testcrate']
 

src/lib.rs

@@ -104,6 +104,17 @@ impl Build {
             .arg("no-zlib")
             .arg("no-zlib-dynamic");
 
+        #[cfg(not(feature = "weak-crypto"))]
+        {
+            configure
+                .arg("no-md2")
+                .arg("no-rc5")
+                .arg("no-seed")
+                .arg("no-idea")
+                .arg("no-camellia")
+                .arg("no-weak-ssl-ciphers");
+        }
+
         if target.contains("musl") || target.contains("windows") {
             // This actually fails to compile on musl (it needs linux/version.h
             // right now) but we don't actually need this most of the time.