add a simple function to combine both provider and init steps

Cargo.toml

@@ -13,7 +13,6 @@ categories = ["cryptography", "no-std"]
 keywords = ["rustls", "tls"]
 edition = "2021"
 rust-version = "1.75"
-resolver = "1" # Hack to enable the `custom` feature of `getrandom`
 
 # Ensure all dependencies + feats are mapped to crate features for correct usage
 # default features often have std breaking no_std and potentially other unwanted

src/lib.rs

@@ -65,6 +65,12 @@ pub fn provider() -> CryptoProvider {
     }
 }
 
+#[cfg(feature = "alloc")]
+pub fn provider_and_init_rng(rng: Box<dyn RngCore + Send + Sync>) -> CryptoProvider {
+    init_randomness_source(rng);
+    provider()
+}
+
 // TODO: switch to ThinBox once it is available
 #[cfg(feature = "alloc")]
 static mut RNG: OnceCell<Box<dyn RngCore + Send + Sync>> = OnceCell::new();