Certify certs downloaded from the web.

- Fixes #174.

Cargo.lock

@@ -3025,9 +3025,9 @@ dependencies = [
 
 [[package]]
 name = "sequoia-cert-store"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9359ae25b815675b04c89216709c4c6cc6b7b4d4a0a5547f0f3635c3a1803a58"
+checksum = "e0d58235b88e5518ca84a74462e07c4391cb9b3067dccfb9b4ed8a8fdad77299"
 dependencies = [
  "anyhow",
  "crossbeam",

Cargo.toml

@@ -42,7 +42,7 @@ clap = { version = "4", features = ["derive", "env", "string", "wrap_help"] }
 humantime = "2"
 indicatif = "0.17"
 itertools = ">=0.10, <0.13"
-sequoia-cert-store = "0.4.1"
+sequoia-cert-store = "0.4.2"
 sequoia-wot = "0.9"
 tempfile = "3.1"
 tokio = { version = "1.13.1" }

src/commands/network.rs

@@ -524,7 +524,12 @@ impl Method {
                 }
                 Method::WKD => certd.shadow_ca_wkd()?,
                 Method::DANE => certd.shadow_ca_dane()?,
-                Method::Http(_) => return Ok(None),
+                Method::Http(url) =>
+                    if let Some(r) = certd.shadow_ca_for_url(&url.to_string())? {
+                        r
+                    } else {
+                        return Ok(None);
+                    },
                 Method::CertStore => return Ok(None),
             };