Made some advancements on the cryptographic primitives implementation

src/crypto/sha256.zig

@@ -1,7 +1,18 @@
 pub const Implementation = struct {
     
+    hash: *const fn (buffer: []const u8, out: []u8) void,
 };
 
 pub const defaultImplementation = struct {
     
+    const Sha256 = @import("std").crypto.hash.sha2.Sha256;
+
+    const HASH_LEN = 32; // In bytes
+
+    pub fn hash(buffer: []const u8, out: []u8) !void {
+        if (out.len < HASH_LEN) {
+            return error.BufferTooShort;
+        }
+        Sha256.hash(buffer, out, .{});
+    }
 };