Added the random crypto module with its default implementation, implemented the Ed25519 keys generation function

src/crypto.zig

@@ -12,6 +12,7 @@ const HMAC = @import("crypto/hmac.zig");
 const SHA256 = @import("crypto/sha256.zig");
 const SHA512 = @import("crypto/sha512.zig");
 const X25519= @import("crypto/x25519.zig");
+const RANDOM = @import("crypto/random.zig");
 
 
 ///////////////// Structs
@@ -25,6 +26,7 @@ pub const PartialEngine = struct {
     sha256:     ? SHA256.Implementation     = null,
     sha512:     ? SHA512.Implementation     = null,
     x25519:     ? X25519.Implementation     = null,
+    random:     ? RANDOM.Implementation     = null,
 };
 
 pub const Engine = struct {
@@ -35,6 +37,7 @@ pub const Engine = struct {
     sha256:     SHA256.Implementation,
     sha512:     SHA512.Implementation,
     x25519:     X25519.Implementation,
+    random:     RANDOM.Implementation,
 };
 
 
@@ -53,6 +56,7 @@ pub fn resolveEngine(comptime provider: PartialEngine) Engine {
         .sha256     = provider.sha256     orelse SHA256.DefaultImplementation,
         .sha512     = provider.sha512     orelse SHA512.DefaultImplementation,
         .x25519     = provider.x25519     orelse X25519.DefaultImplementation,
+        .random     = provider.random     orelse RANDOM.DefaultImplementation,
     };
 }