dev: reduce build sizes (especially debug)

Cargo.toml

@@ -10,8 +10,19 @@ keywords = ["oauth", "oauth2", "oidc", "OpenID"]
 categories = ["web-programming::http-server", "authentication"]
 
 [profile.release]
+lto = true
 strip = "symbols" # almost half of binary size smh
 
+# so I don't need "full" just yet and the debug builds are HUGE
+[profile.dev]
+debug = 1
+[profile.dev.package.actix-web]
+opt-level = 3
+debug = false
+[profile.dev.package.tokio]
+opt-level = 3
+debug = false
+
 [features]
 default = ["pamsock"]
 pamsock = ["dep:pamsock"]

src/utils.rs

@@ -37,3 +37,29 @@ pub mod web {
         }
     }
 }
+
+pub mod shasum {
+    #[must_use]
+    pub fn sha256sum_to_hex_string(sha256sum: &[u8]) -> String {
+        let mut out = String::with_capacity(sha256sum.len() * 2);
+
+        for &b in sha256sum {
+            /// Only correct as long as `n` is ranged within a nibble
+            #[inline]
+            const fn nibble_to_hex(n: u8) -> char {
+                (match n {
+                    0..=9 => b'0' + n,
+                    _ => b'a' + (n - 10),
+                }) as char
+            }
+
+            let hi = (b >> 4) & 0x0f;
+            let lo = b & 0x0f;
+
+            out.push(nibble_to_hex(hi));
+            out.push(nibble_to_hex(lo));
+        }
+
+        out
+    }
+}